Themed collection CO2 capture and conversion

Elena Shevchenko, Ah-Hyung Alissa Park, Shouheng Sun and Tierui Zhang introduce the Nanoscale themed collection on CO₂ capture and conversion.

This article reviews the strategies of maximizing CO₂ photoreduction rates in distinguished ZnS-based photocatalytic systems by continuously optimizing the reaction medium and photocatalysts.

Both unary Bi and binary BiSn catalysts exhibit high faradaic efficiencies toward the production of formic acid via electrocatalytic CO₂ reduction approach. The electrocatalytic abilities are directly related to the structures and morphologies of the metal-based catalysts.

Alloying is efficient for tuning product selectivity of copper in electrochemical reduction of CO₂. Different alloying strategies and their impacts on product formation paths, the key challenges and future directions of the field have been reviewed.

This review paper provides an overview of the fundamental and applied aspects of advancing carbon dioxide electrolysis for the integrated amine-based CO₂ capture and conversion.

To evaluate the role of Ag in Ag-based photocatalysts, heterojunction and localized surface plasmon resonance effect are reviewed along with emerging applications - CO₂ reduction, water splitting, antibacterial application and pollutant removal, etc.

The ever-increasing energy demand leads to fast depletion of fossil fuels and excessive CO₂ emission into the atmosphere, and requires efficient capture and conversion of CO₂ to achieve negative carbon emission and energy sustainability.

This review focuses on the recent research progress in photocatalytic CO₂ conversion systems from C1 products to multi-carbon oxygenates.

Doping Ti atoms into ultrathin WO₃ nanosheets can enhance the separation of photogenerated carriers and facilitate charge transfer, which is beneficial for CO₂ activation and COOH* formation, thus promoting the formation of CH₃OH.

The 3D porous Cu-TCPP(Cu) MOF was adopted as the catalytic scaffold on exquisite multi-junction Si-based photocathodes for boosting both the kinetics and selectivity of photoelectrochemical CO₂ reduction reactions.

Electrochemical carbon dioxide capture by supercapacitors is found to depend strongly on charging protocols. Varying the charging polarity leads to increases in capture capacities and improved mechanistic understanding of the capture process.

A novel siloxene material with a high specific surface area of 217.8 m² g⁻¹ was prepared with a feasible room-temperature method, enabling high catalytic performances for both photothermal CO₂ reduction and electrochemical hydrogen evolution.

The current study reports A_xA′_1−xB_yB′_1−yO_3−δ perovskite redox catalysts (RCs) for CO₂-splitting and methane partial oxidation (POx) in a cyclic redox scheme.

Yolk(CaO)–shell(ZrO₂)-structured sorbents yield superior materials for high-temperature CO₂ capture by mitigating deactivation via sintering and mixed phase (CaZrO₃) formation.

Tungsten nanoparticles are encapsulated in silica, preserving particle size during carburization, leading to active and selective catalysts for CO₂ hydrogenation.

Metal–organic frameworks (MOFs) can selectively adsorb CO₂, but are often ineffective in the presence of H₂O, which binds more strongly. By selecting MOF ‘shells’ to keep water out of MOF ‘cores’ this limitation may be overcome.

A metal–organic framework, known as Mg-CUK-1, is loaded with Ru and Ni nanoparticles and evaluated as a hybrid sorbent/catalyst for the integrated capture and conversion of carbon dioxide to methane under temperature-swing operating conditions.

Herein we describe the use of an ultramicroporous metal–organic framework for the selective capture of carbon dioxide from wet flue gas followed by its conversion to value-added products.

The specific identity of electrolyte cations has many implications in various electrochemical reactions. However, the exact mechanism by which cations affect electrochemical reactions is unknown.

Bio-enhanced carbonate precipitation for CO₂ mineralization.

The hydrogenation of CO₂ is a structure sensitive reaction over copper nanoparticles. The particle size effect has been related to the differences in reaction intermediate coverage for different Cu facets whose abundancy vary with the particle size.

GIXRD is used to determine the relative ratio of facets in porous electrocatalysts, thus providing a general technique for evaluating how the surface faceting affects product selectivity for CO₂ conversion: (left) Bragg–Brentano vs. (right) GIXRD

CO₂ captured from high temperature effluent gases by molten borate salts are reduced electrochemically to form carbon nanotubes.

CO₂ separations from cabin air and the atmospheric air are achieved by ionic liquid containing facilitated transport membrane.

In this work we show that it is possible to design “switchable” dual function materials that can directly convert carbon dioxide into useful products using hydrogen or methane. These DFMs offer a means to respond to changes in the energy sector.

Alkyl groups are grafted onto the surface of g-C₃N₄ for optimizing the adsorption of reactants and improving the photoelectronic properties, and thus greatly enhance the photocatalytic CO₂ reduction activity.

Electrochemical CO₂ reduction is an appealing approach to diminish CO₂ emissions, while obtaining valuable chemicals and fuels from renewable electricity.

A combined structural engineering strategy and thinning strategy were used to optimize nanoarray-based photothermal catalysts, showing a high CO₂ conversion rate of 1780 mmol g_Co^-1 h^-1.

Microporous graphitic carbon derived from cyclodextrins exhibited photocatalytic activity in CO₂ reduction upon irradiation in the presence of triethanolamine, forming H₂ (19 μmol h⁻¹), CO (23 μmol h⁻¹) and CH₄ (4 μmol h⁻¹).

Pd overlayer content in Ag@Pd bimetallic nanoparticles determines the strain profile and CO₂ conversion performance.

Confinement mediates the formation of calcite preferentially over metastable carbonate phases due to the presence of fewer water molecules in the first hydration shell of calcium ions in confined fluids compared to in bulk fluids.

A MgO sorbent synthesized on a CNT template achieved stable multicycle CO₂ capture performance by preventing agglomeration and preserving the material's structure.

Electrodeposited Sn–Cu@Sn dendrites have enhanced selectivity for CO₂ reduction to formic acid on a gas diffusion electrode.

The result of probing the dynamic structure of co-sputtered CuO and ZnO electrocatalyst suggests the reversing Ostwald ripening of Cu structure is triggered during CO₂RR and has a key impact on its methane selectivity.

Low temperature CO₂ reduction and mechanism on BaTiO₃ nanocatalysts from 500 K, CO₂ physical adsorption at 300–500 K, CO₂ chemisorption above 450 K, CO₂ reduction at 500–850 K, and CO₂ and CO release above 800 K.

A cascade Z-scheme nano-heterojunction of TiO₂ incorporated TCPP/PDI with full spectrum response is constructed for efficient CO₂ reduction, in which the energy platform TiO₂ directs charge transfer by inhibiting the pathway as that in a type II one.

The ZnCr-LDH/Ti₃C₂T_x hybrid obtained using an in situ coprecipitation method was forming a Schottky junction to promote the yield of photoreduction CO₂ to CO and CH₄ gas.

This article reports a facile laser ablation in liquid (LAL) strategy for synthesizing gold nanoparticles (Au NPs) whose rich compressive strain can greatly promote the electrochemical CO₂ reduction performance of Au.

We report the first ever robocast (additive manufacturing/3D printing) sintered ceria scaffolds, and explore their use for the production of renewable fuels via solar thermochemical fuel production using concentrated solar energy.