Journal
CHEMICAL SCIENCE
Volume 13, Issue 28, Pages 8388-8394Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2sc02222b
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Funding
- National Key Research and Development Program of China [2017YFA0403102, 2017YFA0403003, 2017YFA0403101]
- National Natural Science Foundation of China [22003070, 21890761, 21733011, 22121002]
- Chinese Academy of Sciences [QYZDY-SSW-SLH013]
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In this study, Cu nanoparticles supported on N-doped carbon were designed for the electroreduction of CO2 to CH4. The catalyst exhibited outstanding performance with high FE and current density, providing a new approach for producing CH4.
The electroreduction of CO2 to CH4 has attracted extensive attention. However, it is still a challenge to achieve high current density and faradaic efficiency (FE) for producing CH4 because the reaction involves eight electrons and four protons. In this work, we designed Cu nanoparticles supported on N-doped carbon (Cu-np/NC). It was found that the catalyst exhibited outstanding performance for the electroreduction of CO2 to CH4. The FE toward CH4 could be as high as 73.4% with a high current density of 320 mA cm(-2). In addition, the mass activity could reach up to 6.4 A mg(Cu)(-1). Both experimental and theoretical calculations illustrated that the pyrrolic N in NC could accelerate the hydrogenation of *CO to the *CHO intermediate, resulting in high current density and excellent selectivity for CH4. This work conducted the first exploration of the effect of N-doped species in composites on the electrocatalytic performance of CO2 reduction.
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