期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 40, 页码 13135-13139出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201807571
关键词
bifunctional systems; CO2 reduction; electrocatalysis; metal-free electrodes; nanomaterials
资金
- National Natural Science Foundation of China [21872147, 21501173, 21805277, 21601190]
- Natural Science Foundation of Fujian Province [2018J05030]
- National Key R&D Program of China [2016YFB0100100]
- Strategic Priority Research Program, CAS [XDB20000000]
Photo/electrochemical CO2 splitting is impeded by the low cost-effective catalysts for key reactions: CO2 reduction (CDRR) and water oxidation. A porous silicon and nitrogen co-doped carbon (SiNC) nanomaterial by a facile pyrolyzation was developed as a metal-free bifunctional electrocatalyst. CO2-to-CO and oxygen evolution (OER) partial current density under neutral conditions were enhanced by two orders of magnitude in the Tafel regime on SiNC relative to single-doped comparisons beyond their specific area gap. The photovoltaic-driven CO2 splitting device with SiNC electrodes imitating photosynthesis yielded an overall solar-to-chemical efficiency of advanced 12.5% (by multiplying energy efficiency of CO2 splitting cell and photovoltaic device) at only 650mV overpotential. Mechanism studies suggested the elastic electron structure of -Si(O)-C-N- unit in SiNC as the highly active site for CDRR and OER simultaneously by lowering the free energy of CDRR and OER intermediates adsorption.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据