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Tailoring the d‐Band Centers Enables Co 4 N Nanosheets To Be Highly Active for Hydrogen Evolution Catalysis
Author(s) -
Chen Zhiyan,
Song Yao,
Cai Jinyan,
Zheng Xusheng,
Han Dongdong,
Wu Yishang,
Zang Yipeng,
Niu Shuwen,
Liu Yun,
Zhu Junfa,
Liu Xiaojing,
Wang Gongming
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201801834
Subject(s) - overpotential , catalysis , materials science , xanes , transition metal , hydrogen , doping , band gap , nanotechnology , water splitting , desorption , hydrogen fuel , chemical engineering , chemistry , optoelectronics , spectroscopy , photocatalysis , physics , organic chemistry , adsorption , electrode , quantum mechanics , engineering , electrochemistry
Endowing materials with specific functions that are not readily available is always of great importance, but extremely challenging. Co 4 N, with its beneficial metallic characteristics, has been proved to be highly active for the oxidation of water, while it is notoriously poor for catalyzing the hydrogen evolution reaction (HER), because of its unfavorable d‐band energy level. Herein, we successfully endow Co 4 N with prominent HER catalytic capability by tailoring the positions of the d‐band center through transition‐metal doping. The V‐doped Co 4 N nanosheets display an overpotential of 37 mV at 10 mA cm −2 , which is substantially better than Co 4 N and even close to the benchmark Pt/C catalysts. XANES, UPS, and DFT calculations consistently reveal the enhanced performance is attributed to the downshift of the d‐band center, which helps facilitate the H desorption. This concept could provide valuable insights into the design of other catalysts for HER and beyond.