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|Title:||Heteroatom-doped transition metal electrocatalysts for hydrogen evolution reaction|
|Citation:||ACS Energy Letters, 2019; 4(4):805-810|
|Publisher:||American Chemical Society|
|Huanyu Jin, Xin Liu, Shuangming Chen, Anthony Vasileff, Laiquan Li, Yan Jiao, Li Song, Yao Zheng, and Shi-Zhang Qiao|
|Abstract:||Developing efficient and low-cost electrocatalysts for the hydrogen evolution reaction (HER) is important for clean energy systems. Non-noble transition metals are the most promising candidates for replacement of conventional Pt group catalysts for the HER. However, most non-noble metals show poor HER activity due to their intrinsic electronic structures. Herein, we use a multifaceted heteroatom doping method (nitrogen, sulfur, and phosphorus) to directly and continuously fine-tune the electronic structure and HER activity of non-noble metals without changing their chemical composition. As a proof-of-concept, a nitrogen and phosphorus dual-doped Ni catalyst is explored by precisely manipulating doping modes, revealing the best HER performance among all doped Ni catalysts tested. The doping-induced charge redistribution in the Ni metal significantly influences its catalytic performance for the HER in alkaline media, which is confirmed by merging theoretical calculation with synchrotron-based spectroscopy. The principle that can bridge the doping modes and HER activity of the doped catalysts is built with a volcano relationship.|
|Rights:||© 2019 American Chemical Society|
|Appears in Collections:||Chemical Engineering publications|
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