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Themed collection 2019 Journal of Materials Chemistry A Most Popular Articles

50 items
Communication

Improving the electrocatalytic N2 reduction activity of Pd nanoparticles through surface modification

Tannic acid (TA)-modified Pd nanoparticles (Pd-TA) are efficient for ambient electrocatalytic N2-to-NH3 fixation with an NH3 yield of 24.12 μg h−1 mgcat.−1 and a faradaic efficiency of 9.49%.

Graphical abstract: Improving the electrocatalytic N2 reduction activity of Pd nanoparticles through surface modification
Communication

Metal-free energy storage systems: combining batteries with capacitors based on a methylene blue functionalized graphene cathode

Novel aqueous hybrid ion capacitors based on an MB functionalized graphene cathode and asymmetric electrolytes exhibited both improved energy density and power density.

Graphical abstract: Metal-free energy storage systems: combining batteries with capacitors based on a methylene blue functionalized graphene cathode
Communication

Ambient electrohydrogenation of N2 for NH3 synthesis on non-metal boron phosphide nanoparticles: the critical role of P in boosting the catalytic activity

As a non-metal electrocatalyst for the N2 reduction reaction, boron phosphide nanoparticles offer a high NH3 yield of 26.42 μg h−1 mgcat.−1 and a high faradaic efficiency of 12.7% at –0.60 V vs. the reversible hydrogen electrode in 0.1 M HCl.

Graphical abstract: Ambient electrohydrogenation of N2 for NH3 synthesis on non-metal boron phosphide nanoparticles: the critical role of P in boosting the catalytic activity
Communication

One-pot synthesized molybdenum dioxide–molybdenum carbide heterostructures coupled with 3D holey carbon nanosheets for highly efficient and ultrastable cycling lithium-ion storage

The function of the interfacial effect caused by MoO2/Mo2C heterostructures was proved by DFT and DOS calculations, promoting ultrastable cycling performance.

Graphical abstract: One-pot synthesized molybdenum dioxide–molybdenum carbide heterostructures coupled with 3D holey carbon nanosheets for highly efficient and ultrastable cycling lithium-ion storage
Communication

Ultra-facile aqueous synthesis of nanoporous zeolitic imidazolate framework membranes for hydrogen purification and olefin/paraffin separation

An ultra-facile one-step method is discovered to synthesize defect-free ZIF-8 molecular sieve membranes in aqueous solution at room temperature for exceptional gas separation.

Graphical abstract: Ultra-facile aqueous synthesis of nanoporous zeolitic imidazolate framework membranes for hydrogen purification and olefin/paraffin separation
Communication

Highly efficient hydrogen sensors based on Pd nanoparticles supported on boron nitride coated ZnO nanowires

High selectivity and sensitivity were measured using a novel type of sensor device, based on ZnO nanowires (NWs) coated with a thin layer of boron nitride (BN) decorated with palladium nanoparticles (NPs).

Graphical abstract: Highly efficient hydrogen sensors based on Pd nanoparticles supported on boron nitride coated ZnO nanowires
Paper

16.7%-efficiency ternary blended organic photovoltaic cells with PCBM as the acceptor additive to increase the open-circuit voltage and phase purity

Ternary solar cells with an efficiency of 16.7% were enabled through the use of PCBM as a higher LUMO-level acceptor additive to concurrently increase Voc, Jsc and FF values.

Graphical abstract: 16.7%-efficiency ternary blended organic photovoltaic cells with PCBM as the acceptor additive to increase the open-circuit voltage and phase purity
Paper

Pure spin current generated in thermally driven molecular magnetic junctions: a promising mechanism for thermoelectric conversion

Thermally driven magnetic-molecular junctions can be designed as pure spin current generators, spin thermoelectric devices or thermal-spin converters.

Graphical abstract: Pure spin current generated in thermally driven molecular magnetic junctions: a promising mechanism for thermoelectric conversion
Paper

Graphene oxide based dopamine mussel-like cross-linked polyethylene imine nanocomposite coating with enhanced hexavalent uranium adsorption

GO-pDA-PEI with excellent stability provided enough movement space and active sites for highly preferential adsorption of U(VI).

Graphical abstract: Graphene oxide based dopamine mussel-like cross-linked polyethylene imine nanocomposite coating with enhanced hexavalent uranium adsorption
Paper

A novel strategy for the synthesis of highly stable ternary SiOx composites for Li-ion-battery anodes

A facile method is used to prepare a series of high-performance Ni/SiOx/nitrogen-doped carbon ternary anodes for lithium-ion batteries.

Graphical abstract: A novel strategy for the synthesis of highly stable ternary SiOx composites for Li-ion-battery anodes
Paper

The comprehensive utilization of the synergistic effect of fullerene and non-fullerene acceptors to achieve highly efficient polymer solar cells

A ternary strategy could combine the advantages of incorporated materials as an encouraging approach to achieve high power conversion efficiency (PCE) polymer solar cells (PSCs).

Graphical abstract: The comprehensive utilization of the synergistic effect of fullerene and non-fullerene acceptors to achieve highly efficient polymer solar cells
Paper

Magnetic functional heterojunction reactors with 3D specific recognition for selective photocatalysis and synergistic photodegradation in binary antibiotic solutions

Magnetic functional heterojunction reactors, containing a 3D specific recognition layer and TiO2–POPD heterojunction, improve the selectivity and photocatalytic activity.

Graphical abstract: Magnetic functional heterojunction reactors with 3D specific recognition for selective photocatalysis and synergistic photodegradation in binary antibiotic solutions
Paper

Zinc ion stabilized MnO2 nanospheres for high capacity and long lifespan aqueous zinc-ion batteries

Zinc ion stabilized MnO2 nanospheres with a flower-like morphology and mesoporous texture are prepared, and they show high specific capacity and superior cycling stability for Zn-ion batteries.

Graphical abstract: Zinc ion stabilized MnO2 nanospheres for high capacity and long lifespan aqueous zinc-ion batteries
Paper

Amphiphilic two-dimensional graphitic carbon nitride nanosheets for visible-light-driven phase-boundary photocatalysis

Amphiphilic two-dimensional graphitic carbon nitride nanosheets exhibit improved performance for visible-light-driven phase-boundary photocatalytic reduction of nitrobenzene to aniline.

Graphical abstract: Amphiphilic two-dimensional graphitic carbon nitride nanosheets for visible-light-driven phase-boundary photocatalysis
Paper

Sulfur-deficient MoS2 grown inside hollow mesoporous carbon as a functional polysulfide mediator

Engineering sulfur vacancies in ultrathin MoS2 nanosheets enabled enhanced trapping of polysulfide intermediates with propelled redox conversion kinetics.

Graphical abstract: Sulfur-deficient MoS2 grown inside hollow mesoporous carbon as a functional polysulfide mediator
Paper

Transition metal-embedded two-dimensional C3N as a highly active electrocatalyst for oxygen evolution and reduction reactions

The best catalyst for OER is Rh-VCC with ηOER of 0.35 V, followed by Co-VCC (0.43 V). For ORR, Rh-VCC exhibits the lowest ηORR value of 0.27 V, followed by Co-VCC (0.42 V).

Graphical abstract: Transition metal-embedded two-dimensional C3N as a highly active electrocatalyst for oxygen evolution and reduction reactions
Paper

Tunable titanium metal–organic frameworks with infinite 1D Ti–O rods for efficient visible-light-driven photocatalytic H2 evolution

A new approach for the synthesis of infinite Ti–O rod-based MOFs with superior photocatalytic H2 evolution performances was developed.

Graphical abstract: Tunable titanium metal–organic frameworks with infinite 1D Ti–O rods for efficient visible-light-driven photocatalytic H2 evolution
Paper

Zinc–nickel–cobalt ternary hydroxide nanoarrays for high-performance supercapacitors

Zn–Ni–Co ternary hydroxide nanoarrays with a controlled morphology are used as the cathode material for supercapacitors for the first time.

Graphical abstract: Zinc–nickel–cobalt ternary hydroxide nanoarrays for high-performance supercapacitors
Paper

Achieving gradient-pore-oriented graphite felt for vanadium redox flow batteries: meeting improved electrochemical activity and enhanced mass transport from nano- to micro-scale

A gradient-pore-oriented graphite felt electrode was prepared by a facile one-step etching method, showing improved electrochemical activity and enhanced mass transport from nano- to micro-scale in flow batteries.

Graphical abstract: Achieving gradient-pore-oriented graphite felt for vanadium redox flow batteries: meeting improved electrochemical activity and enhanced mass transport from nano- to micro-scale
Paper

Conductive hollow kapok fiber-PPy monolithic aerogels with excellent mechanical robustness for efficient solar steam generation

‘Kapok fiber-PPy aerogels were prepared by using polypyrrole modification of the Ca2+ crosslinked kapok fiber aerogels. The kapok fiber-PPy aerogels show excellent light absorption, high porosity and mechanical strength’. As a solar steam generator a high energy conversion efficiency of 82.4% was obtained under 1 sun illumination.

Graphical abstract: Conductive hollow kapok fiber-PPy monolithic aerogels with excellent mechanical robustness for efficient solar steam generation
Paper

Enhanced efficacy of defect passivation and charge extraction for efficient perovskite photovoltaics with a small open circuit voltage loss

A multifunctional 2D polymeric semiconductor was incorporated to provide surprisingly robust efficacy in grain boundary functionalization and defect passivation of perovskite, which suppresses charge recombination and thus affording an illustrious photovoltage of 1.16 V and power conversion efficiency of 21.1%.

Graphical abstract: Enhanced efficacy of defect passivation and charge extraction for efficient perovskite photovoltaics with a small open circuit voltage loss
Paper

MOFs-derived Co9S8-embedded graphene/hollow carbon spheres film with macroporous frameworks for hybrid supercapacitors with superior volumetric energy density

Electrode materials with macroporous structures have desirable structural advantages, which can provide excellent reaction sites for electrons and ions.

Graphical abstract: MOFs-derived Co9S8-embedded graphene/hollow carbon spheres film with macroporous frameworks for hybrid supercapacitors with superior volumetric energy density
Paper

Ultra-high energy storage performance with mitigated polarization saturation in lead-free relaxors

A strategy of mitigating polarization saturation is applied to enhance the energy storage properties of Sn-modified NBT–ST relaxor ceramics.

Graphical abstract: Ultra-high energy storage performance with mitigated polarization saturation in lead-free relaxors
Open Access Paper

Ab initio investigation of the stability of electrolyte/electrode interfaces in all-solid-state Na batteries

Calculated voltage stability window of selected Na oxides.

Graphical abstract: Ab initio investigation of the stability of electrolyte/electrode interfaces in all-solid-state Na batteries
From the themed collection: Recent Open Access Articles
Paper

Multipurpose [1,2,4]triazolo[4,3-b][1,2,4,5] tetrazine-based energetic materials

Next-generation fused ring energetic materials for different applications were designed by regulating mechanical sensitivity.

Graphical abstract: Multipurpose [1,2,4]triazolo[4,3-b][1,2,4,5] tetrazine-based energetic materials
Paper

Achieving 14.11% efficiency of ternary polymer solar cells by simultaneously optimizing photon harvesting and exciton distribution

The exciton distribution can be optimized by employing ternary strategy, which well supports the performance improvement of ternary PSCs.

Graphical abstract: Achieving 14.11% efficiency of ternary polymer solar cells by simultaneously optimizing photon harvesting and exciton distribution
Paper

Precursor-mediated size tuning of monodisperse PtRh nanocubes as efficient electrocatalysts for ethylene glycol oxidation

We firstly report a reliable method to synthesize PtRh-S and PtRh-L NCs with different size of 5.5 and 10.5 nm. PtRh-S NCs show much better electrochemical activity and stability than PtRh-L NCs and pure Pt NCs towards EGOR.

Graphical abstract: Precursor-mediated size tuning of monodisperse PtRh nanocubes as efficient electrocatalysts for ethylene glycol oxidation
Paper

Constructing metallic zinc–cobalt sulfide hierarchical core–shell nanosheet arrays derived from 2D metal–organic-frameworks for flexible asymmetric supercapacitors with ultrahigh specific capacitance and performance

Electrode materials of flexible asymmetric supercapacitors are usually suffers from low capacitance and sluggish kinetics.

Graphical abstract: Constructing metallic zinc–cobalt sulfide hierarchical core–shell nanosheet arrays derived from 2D metal–organic-frameworks for flexible asymmetric supercapacitors with ultrahigh specific capacitance and performance
Paper

MoNb12O33 as a new anode material for high-capacity, safe, rapid and durable Li+ storage: structural characteristics, electrochemical properties and working mechanisms

Intercalation-type MoNb12O33 with a porous-microspherical nanoarchitecture is explored as the first molybdenum niobium oxide anode material for Li+ storage.

Graphical abstract: MoNb12O33 as a new anode material for high-capacity, safe, rapid and durable Li+ storage: structural characteristics, electrochemical properties and working mechanisms
Paper

Rational design of free-standing 3D porous MXene/rGO hybrid aerogels as polysulfide reservoirs for high-energy lithium–sulfur batteries

A Ti3C2Tx MXene/rGO hybrid aerogel is applied for the first time as a free-standing polysulfide reservoir to inhibit the shuttle effect and improve the overall performance of Li–S batteries.

Graphical abstract: Rational design of free-standing 3D porous MXene/rGO hybrid aerogels as polysulfide reservoirs for high-energy lithium–sulfur batteries
Paper

Selective integration of hierarchical nanostructured energy materials: an effective approach to boost the energy storage performance of flexible hybrid supercapacitors

A selective integration of Ni(OH)2 NNAs@NiO–NiCo2O4 NSAs was rationally designed and directly utilized as a binder-free flexible electrode for hybrid SCs with excellent energy density.

Graphical abstract: Selective integration of hierarchical nanostructured energy materials: an effective approach to boost the energy storage performance of flexible hybrid supercapacitors
Paper

Construction of unique heterogeneous cobalt–manganese oxide porous microspheres for the assembly of long-cycle and high-rate lithium ion battery anodes

Porous (Co, Mn)(Co, Mn)2O4-based microspheres (CM-11-Ms) and core–shell microspheres (CM-11-CSMs) were firstly synthesized via controlled pyrolysis of CoMn-precursor microspheres at different temperatures under nitrogen, exhibiting advanced lithium storage capacities.

Graphical abstract: Construction of unique heterogeneous cobalt–manganese oxide porous microspheres for the assembly of long-cycle and high-rate lithium ion battery anodes
Paper

MXene-derived TiO2/reduced graphene oxide composite with an enhanced capacitive capacity for Li-ion and K-ion batteries

MXene-derived TiO2/RGO composite was designed and synthesized by the hydrothermal process as a universal anode for Li-ion and K-ion batteries.

Graphical abstract: MXene-derived TiO2/reduced graphene oxide composite with an enhanced capacitive capacity for Li-ion and K-ion batteries
Paper

g-C3N4 promoted MOF derived hollow carbon nanopolyhedra doped with high density/fraction of single Fe atoms as an ultra-high performance non-precious catalyst towards acidic ORR and PEM fuel cells

Atomic Fe-doped hollow carbon nanopolyhedra as efficient ORR catalysts.

Graphical abstract: g-C3N4 promoted MOF derived hollow carbon nanopolyhedra doped with high density/fraction of single Fe atoms as an ultra-high performance non-precious catalyst towards acidic ORR and PEM fuel cells
Paper

Conversion of dinitrogen to ammonia on Ru atoms supported on boron sheets: a DFT study

By first-principles computations, nitrogen becomes activated via distal pathway on the single Ru-atom-embedded two boron monolayers, exhibiting relatively low reaction energy barriers of 0.42 and 0.44 eV, respectively.

Graphical abstract: Conversion of dinitrogen to ammonia on Ru atoms supported on boron sheets: a DFT study
Paper

Linear-like lead-free relaxor antiferroelectric (Bi0.5Na0.5)TiO3–NaNbO3 with giant energy-storage density/efficiency and super stability against temperature and frequency

A novel lead-free polar dielectric ceramic with linear-like polarization responses was found in (1 − x)(Bi0.5Na0.5)TiO3xNaNbO3 ((1 − x)BNT–xNN) solid solutions, exhibiting giant energy storage density/efficiency and super stability against temperature and frequency.

Graphical abstract: Linear-like lead-free relaxor antiferroelectric (Bi0.5Na0.5)TiO3–NaNbO3 with giant energy-storage density/efficiency and super stability against temperature and frequency
Paper

Ni-foam supported Co(OH)F and Co–P nanoarrays for energy-efficient hydrogen production via urea electrolysis

Ni-foam-supported Co(OH)F and Co–P nanoarrays were developed for energy-efficient hydrogen production with the assistance of urea electrolysis.

Graphical abstract: Ni-foam supported Co(OH)F and Co–P nanoarrays for energy-efficient hydrogen production via urea electrolysis
Paper

Probing ring-opening pathways for efficient photocatalytic toluene decomposition

The alternative charge arrangement on the {010} facet of BiOCl facilitates benzyl oxidation and selectivity for benzoic acid ring-opening reactions, subsequently resulting in remarkably enhanced photocatalytic efficiency.

Graphical abstract: Probing ring-opening pathways for efficient photocatalytic toluene decomposition
Paper

A metal–organic framework with suitable pore size and dual functionalities for highly efficient post-combustion CO2 capture

A novel porous material was realized for highly efficient post-combustion CO2 capture with high CO2 adsorption capacity, high selectivity and moderate heat of adsorption, mainly attributed to the suitable pore size and dual functionalities.

Graphical abstract: A metal–organic framework with suitable pore size and dual functionalities for highly efficient post-combustion CO2 capture
Paper

Sodium storage in hard carbon with curved graphene platelets as the basic structural units

The mechanism of sodium storage in hard carbon has been revealed by in situ transmission electron microscopy.

Graphical abstract: Sodium storage in hard carbon with curved graphene platelets as the basic structural units
Paper

Enhanced antiferroelectric phase stability in La-doped AgNbO3: perspectives from the microstructure to energy storage properties

High energy density was achieved in lead-free La-doped AgNbO3 antiferroelectric ceramics.

Graphical abstract: Enhanced antiferroelectric phase stability in La-doped AgNbO3: perspectives from the microstructure to energy storage properties
Paper

Synergistic interaction of perovskite oxides and N-doped graphene in versatile electrocatalyst

A new catalyst, P-3G simultaneously exhibited outstanding multifunctional catalytic activities for the ORR, OER, and HER. The synergistic effects between perovskite oxides and 3DNG was firstly proposed by DFT calculations.

Graphical abstract: Synergistic interaction of perovskite oxides and N-doped graphene in versatile electrocatalyst
Paper

Ultrahigh energy density of a N, O codoped carbon nanosphere based all-solid-state symmetric supercapacitor

A novel quinone–amine route is developed to fabricate N, O codoped carbon nanospheres for an all-solid-state supercapacitor with an ultrahigh energy density.

Graphical abstract: Ultrahigh energy density of a N, O codoped carbon nanosphere based all-solid-state symmetric supercapacitor
Paper

Achievable high Voc of carbon based all-inorganic CsPbIBr2 perovskite solar cells through interface engineering

The Voc of carbon based CsPbIBr2 PSCs can be highly boosted through the surface passivation of SnO2 films.

Graphical abstract: Achievable high Voc of carbon based all-inorganic CsPbIBr2 perovskite solar cells through interface engineering
Paper

An indole-based aerogel for enhanced removal of heavy metals from water via the synergistic effects of complexation and cation–π interactions

A novel indole-based aerogel (4-HIFA) has been obtained by the condensation of 4-hydroxyindole and formaldehyde via sol–gel technology, which proceeds easily by acid catalysis in one pot.

Graphical abstract: An indole-based aerogel for enhanced removal of heavy metals from water via the synergistic effects of complexation and cation–π interactions
Paper

Phase transitions in tantalum-modified silver niobate ceramics for high power energy storage

Ag(Nb0.8Ta0.2)O3 is used here as a model system to shed light on the nature of the low temperature phase behavior of the unsubstituted parent compound AgNbO3, which is an important material for high-power energy storage applications.

Graphical abstract: Phase transitions in tantalum-modified silver niobate ceramics for high power energy storage
Paper

Synergistic design of a N, O co-doped honeycomb carbon electrode and an ionogel electrolyte enabling all-solid-state supercapacitors with an ultrahigh energy density

Synergistic design of a N, O co-doped honeycomb porous carbon electrode and an ionogel electrolyte is reported to boost the energy output of all-solid-state supercapacitors.

Graphical abstract: Synergistic design of a N, O co-doped honeycomb carbon electrode and an ionogel electrolyte enabling all-solid-state supercapacitors with an ultrahigh energy density
Paper

An argyrodite sulfide-based superionic conductor synthesized by a liquid-phase technique with tetrahydrofuran and ethanol

An argyrodite Li6PS5Br electrolyte is synthesized using tetrahydrofuran and ethanol solvents and shows the highest conductivity of 3.1 mS cm−1.

Graphical abstract: An argyrodite sulfide-based superionic conductor synthesized by a liquid-phase technique with tetrahydrofuran and ethanol
Paper

Electrospun MXene/carbon nanofibers as supercapacitor electrodes

MXene/carbon composite electrodes with high loadings of MXene were prepared via electrospinning. These flexible and free-standing electrodes exhibit high areal capacitance relative to pure carbon nanofibers and MXene-coated fibers and textiles.

Graphical abstract: Electrospun MXene/carbon nanofibers as supercapacitor electrodes
Paper

A versatile foaming platform to fabricate polymer/carbon composites with high dielectric permittivity and ultra-low dielectric loss

A microcellular structure can effectively tune the dielectric properties of PVDF/carbon composite foams.

Graphical abstract: A versatile foaming platform to fabricate polymer/carbon composites with high dielectric permittivity and ultra-low dielectric loss
50 items

About this collection

This web collection features the top 50 most popular articles published in Journal of Materials Chemistry A in 2019. 

Congratulations to all of the authors whose articles have been featured!

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