Journal
CHEMSUSCHEM
Volume 12, Issue 12, Pages 2644-2650Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201901058
Keywords
carbon nanosheets; CO2 conversion; electrocatalytic reduction; layered confinement reaction; ultra-thin structures
Funding
- National Natural Science Foundation of China [21676093, 21838003, 21776092, 21808061, 21471056]
- Shanghai Scientific and Technological Innovation Project [18JC1410500]
- Social Development Program of Shanghai [17DZ1200900]
- Innovation Program of Shanghai Municipal Education Commission
- Fundamental Research Funds for the Central Universities [222201718002]
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High electrochemical over-potential and low product selectivity are regarded as the main limitations of electroreduction of CO2. Here, we proposed a new strategy to synthesize metal porphyrin-hybridized porous and ultra-thin carbon nanosheets (MPPCN) by the confinement function of the layered template. The layered confinement reaction protects the coordination structure of metal and nitrogen atoms during subsequent high-temperature treatment while ensuring the formation of ultra-thin structures. This method effectively prevents the aggregation of metal atoms, so that the metal atoms exhibit a dispersed state of a single atomic level. MPPCN exhibit unexpected catalytic activity for electroreduction of CO2, and the catalytic reaction can be carried out at an over-potential of 0.39 V. The faradaic efficiency of CO can reach 95.9 % at the potential of -0.7 V versus the reversible hydrogen electrode.
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