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Issue 40, 2019
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Intentional construction of high-performance SnO2 catalysts with a 3D porous structure for electrochemical reduction of CO2

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Abstract

Herein, SnO2-NC (SnO2-nanocube) and SnO2-NF (SnO2-nanoflake) electro-catalysts featuring a large specific surface area and 3D porous structure were successfully constructed via acid etching and sulfurization–desulphurization methods, respectively. As catalysts for the electrochemical reduction of CO2, the faradaic efficiency (FHCOO+CO = 82.4%, 91.5%, respectively) and partial current density (jHCOO+CO = 10.7 and 11.5 mA cm−2, respectively) of SnO2-NCs and SnO2-NFs were enhanced in comparison with SnO2-NPs (SnO2-nanoparticles, FHCOO+CO = 63.4%, jHCOO+CO = 5.7 mA cm−2) at −1.0 V vs. RHE. The enhanced catalytic activity is attributed to their uniform 3D porous structure, high specific surface area and excellent wettability. Additionally, the morphology of SnO2-NCs and SnO2-NFs was largely preserved after electrolyzing for 12 h (after 12 h of electrolysis), indicating the effective buffering effect of the 3D structure in electrolysis. Naturally, the current density and faradaic efficiency of the SnO2-NC and SnO2-NF catalysts remained nearly unchanged after long-term stability measurements, revealing great stability.

Graphical abstract: Intentional construction of high-performance SnO2 catalysts with a 3D porous structure for electrochemical reduction of CO2

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Publication details

The article was received on 25 Jul 2019, accepted on 12 Sep 2019 and first published on 12 Sep 2019


Article type: Paper
DOI: 10.1039/C9NR06354D
Nanoscale, 2019,11, 18715-18722

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    Intentional construction of high-performance SnO2 catalysts with a 3D porous structure for electrochemical reduction of CO2

    X. Zhang, Z. Chen, K. Mou, M. Jiao, X. Zhang and L. Liu, Nanoscale, 2019, 11, 18715
    DOI: 10.1039/C9NR06354D

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