Vanadium and nitrogen co-doped CoP nanoleaf array as pH-universal electrocatalyst for efficient hydrogen evolution

JOURNAL OF ALLOYS AND COMPOUNDS

卷:791

Article

Zhang, Wen¹  Sun, Yanfang²  Liu, Qingyun³  Guo, Jinxue¹  Zhang, Xiao¹ 

[1] Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, Key Lab Biochem Anal,MOE, Key Lab Opt Elect Sensing & Analyt Chem Life Sci, Qingdao 266042, Shandong, Peoples R China

[2] Agr Univ Hebei, Coll Sci & Technol, Cangzhou 061100, Peoples R China

[3] Shandong Univ Sci & Technol, Coll Chem & Environm Engn, Qingdao 266510, Shandong, Peoples R China

关键词: CoP;    Vanadium doping;    Nitrogen doping;    pH-universal;    Water splitting;   

DOI  :  10.1016/j.jallcom.2019.03.380

来源: Elsevier

【 摘 要 】

Exploring electrocatalysts which efficiently perform the hydrogen evolution reaction (HER) catalytic activity over wide pH range is greatly important for water splitting, however, remains enormous challenge. Herein, the host catalyst of CoP nanoarray on carbon cloth is co-doped with the guest elements of vanadium and nitrogen to acquire tuned electronic characteristics and additional active sites for improved HER activity. The electrochemical measurements show that the as-obtained V, N-CoP is endowed with smaller overpotentials and Tafel slopes than V-CoP and CoP. Impressively, V, N-CoP only needs low overpotentials of 57, 146, and 81 mV at 10 mA cm(-2) in 1 M KOH, 1 M phosphate buffer, and 0.5 M H2SO4, respectively. This study sets a blueprint for developing pH-universal HER electrocatalysts via metal and nonmetal elements co-doping engineering. (C) 2019 Elsevier B.V. All rights reserved.

【 授权许可】

Free