期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 8, 期 18, 页码 8920-8926出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta03290e
关键词
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资金
- National Key Project on Basic Research [2016YFB0101202]
- National Natural Science Foundation of China [21773263, 21625502, 21974070, 21873050]
The development of efficient and cost-effective electrocatalysts is essential for the electrochemical reduction of N-2 to produce NH3 under ambient conditions. Herein, various well-dispersed Mo-based nanoparticles are selectively synthesized to reveal the influences of the compositions and hetero-interfaces on the performance for the N-2 reduction reaction (NRR). Systematic experiments discovered that compared with single-component Mo2C or Mo nanoparticles, the heterostructured binary MoC/Mo2C and ternary Mo/MoC/Mo2C nanoparticles exhibit significantly enhanced NRR performance by creating abundant hetero-interfaces. Moreover, theoretical calculations reveal that the integration of metallic Mo with MoC/Mo2C appreciably reduces the energy demand for NH3 desorption, contributing to the enhanced NRR process. As a result, a remarkable NH3 yield rate of up to 20.4 mu g h(-1) mg(-1) and a FE up to 18.9% can be achieved. These findings suggest that engineering crystalline phases and hetero-interfaces represents a new avenue for advancing the electrocatalytic performance of a NRR catalyst.
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