期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 56, 期 2, 页码 505-509出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201608279
关键词
3D electrodes; CO2 reduction; electrocatalysis; nanosheets; nanostructures
资金
- Australian Research Council (ARC) through the ARC Centre of Excellence for Electromaterials Science
- ARC
Electrochemical reduction of CO2 into liquid fuels is a promising approach to achieve a carbon-neutral energy cycle. However, conventional electrocatalysts usually suffer from low energy efficiency and poor selectivity and stability. A 3D hierarchical structure composed of mesoporous SnO2 nanosheets on carbon cloth is proposed to efficiently and selectively electroreduce CO2 to formate in aqueous media. The electrode is fabricated by a facile combination of hydrothermal reaction and calcination. It exhibits an unprecedented partial current density of about 45 mAcm(-2) at a moderate overpotential (0.88 V) with high faradaic efficiency (87 +/- 2%), which is even larger than most gas diffusion electrodes. Additionally, the electrode also demonstrates flexibility and long-term stability. The superior performance is attributed to the robust and highly porous hierarchical structure, which provides a large surface area and facilitates charge and mass transfer.
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