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The Effect of Metal Components in the Quaternary Electrocatalysts on the Morphology and Catalytic Performance of Transition Metal Phosphides
Author(s) -
Cao Qiao,
Gu Wenling,
Li Jing,
Wang Erkang
Publication year - 2018
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201800494
Subject(s) - tafel equation , transition metal , catalysis , metal , morphology (biology) , electrochemistry , materials science , nanowire , platinum , chemical engineering , inorganic chemistry , nanotechnology , chemistry , metallurgy , electrode , geology , organic chemistry , paleontology , engineering
Abstract Development of low‐cost, earth‐abundant alternative electrocatalysts to platinum catalyst for hydrogen evolution reaction (HER) is of great significance. Some multimetallic transition metal phosphides have been synthesized recently. However, the impacts of metal components on the morphology and performance of catalyst were less discussed. In this communication, taking the quaternary phosphides Co x Ni y Mn z P (x+y+z=1) grown on carbon cloth (CC) as an example, the influence of proportion of metals in catalysts on the morphology and HER performance was investigated in detail. The results indicated that When x/y/z=6/1/1(Co 0.75 Ni 0.125 Mn 0.125 P), a nanowire morphology was grown on CC with the optimal HER performance, which had a Tafel slope of 48.87 mV/dec and needed 137 and 190 mV to realize a current density of 10 and 100 mA cm −2 , respectively. Moreover, the electrocatalysts exhibited an excellent long‐term electrochemical durability for at least 12.5 h.