Premium
Ni 1‐x Co x O y , Ni 1‐x Co x S y and Ni 1‐x Co x P y Catalysts Prepared from Ni 1‐x Co x ‐ZIF‐67 for Hydrogen Production by Electrolysis in Alkaline Media
Author(s) -
Cui Yuchen,
Liu Zhi,
Guo Hailing,
Chai Yongming,
Liu Chenguang,
Mintova Svetlana
Publication year - 2019
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201901385
Subject(s) - catalysis , nickel , cobalt , bimetallic strip , crystallinity , inorganic chemistry , sodium hypophosphite , materials science , hydrogen production , chemistry , nuclear chemistry , crystallography , metallurgy , nanotechnology , electroplating , biochemistry , layer (electronics)
Abstract The uniform homeotypic bimetallic Ni 1‐x Co x O y , Ni 1‐x Co x S y and Ni 1‐x Co x P y catalysts were synthesized from Ni 1‐x Co x ‐ZIF‐67 crystals (120‐135 nm) reacting with oxygen, sublimed sulfur and sodium hypophosphite, respectively under control conditions. The catalysts were deposited on glassy carbon electrode (GCE), and their electro‐catalytic activity for hydrogen production in alkaline media by electrolysis was investigated. The electrocatalytic activity of the catalysts towards hydrogen evolution reaction (HER) decreased in the following order Ni 0.1 Co 0.9 P y >Ni 0.2 Co 0.8 O y >Ni 0.5 Co 0.5 S y >Ni 0.1 Co 0.9 ‐ZIF‐67. The Ni 0.1 Co 0.9 P y exhibited the highest electrocatalytic activity towards HER due to the high crystallinity, high specific surface area and the synergistic effect of nickel and cobalt that accelerate the electron transfer process.