@article{Huang2022, 
author = {Jingjing Huang and Zhe Chen and Jinmeng Cai and Yongzhen Jin and Tao Wang and Jianhui Wang},
title = {Activating copper oxide for stable electrocatalytic ammonia oxidation reaction via in-situ introducing oxygen vacancies},
year = {2022},
journal = {Nano Research},
volume = {15},
number = {7},
pages = {5987-5994},
keywords = {stability, oxygen vacancy, electrocatalysis, CuO, ammonia oxidation reaction},
url = {https://www.sciopen.com/article/10.1007/s12274-022-4279-5},
doi = {10.1007/s12274-022-4279-5},
abstract = {Electrocatalytic ammonia oxidation reaction (EAOR) provides an ideal solution for on-board hydrogen supply for fuel cells, while the lack of efficient and durable EAOR catalysts has been a long-standing obstacle for its practical application. Herein, we reported that the defect engineering via in-situ electrochemically introducing oxygen vacancies (Vo) not only turns the inactive CuO into efficient EAOR catalyst but also achieves a high stability of over 400 h at a high current density of ~ 200 mA·cm−2. Theoretical simulation reveals that the presence of Vo on the CuO surface induces a remarkable upshift of the d-band center of active Cu site closer to the Fermi level, which significantly stabilizes the reaction intermediates (*NHx) and efficiently oxidizes NH3 into N2. This Vo-modulated CuO shows a different catalytic mechanism from that on the conventional Pt-based catalysts, paving a new avenue to develop inexpensive, efficient, and robust catalysts, not limited to EAOR.}
}