期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 7, 页码 8337-8343出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c20271
关键词
water splitting; electrocatalyst; alkaline hydrogen evolution reaction; transition metal nitrides; heterostructure
资金
- Natural Science Foundation of Guangdong Province [2016A030312011]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [51621001]
The study introduces a facile synthesis method for a novel self-supported Co2N/CoN/Co2Mo3O8 catalyst, which significantly enhances the catalytic performance for the hydrogen evolution reaction by utilizing a heterostructured design with abundant active sites and good electrical conductivity.
The development of earth-abundant electrocatalysts with high intrinsic activity, abundant active sites, and good electrical conductivity is of vital importance for the market penetration of clean energy technologies. We herein report a facile synthesis of a self-supported Co2N/CoN/Co2Mo3O8 heterostructured catalyst on cobalt foam (CF) by a hydrothermal process followed by nitridation treatment. Our first-principles calculations revealed that Co2Mo3O8 and Co2N could work in concert to provide active sites for an alkaline hydrogen evolution reaction (HER). The hierarchical and nanoporous architecture of the Co2N/CoN/Co2Mo3O8 catalyst ensured an abundance of accessible active sites. The direct growth of metalloid CoxN nanoparticles on the defective Co2Mo3O8 substrate endowed the catalyst with good electrical conductivity. As a consequence, the Co2N/CoN/Co2Mo3O8/CF catalyst showed extraordinarily high activity and good stability toward the alkaline HER, outperforming most existing non-precious electrocatalysts. In particular, it exhibited a comparable catalytic performance to the commercial Pt/C catalyst at a current density of 100 mA cm(-2).
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