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Microwave Synthesis of Carbon‐Supported Cobalt Nickel Selenide Ternary Catalyst Toward the Oxygen Reduction Reaction
Author(s) -
Zheng Jiwu,
Gong Qing,
Cheng Xuan,
Gong Shuiping,
Yang Weifeng,
Huang Liuying
Publication year - 2018
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201800190
Subject(s) - crystallite , catalysis , cobalt , nickel , ternary operation , selenide , chemistry , inorganic chemistry , carbon fibers , materials science , nuclear chemistry , crystallography , organic chemistry , composite number , selenium , computer science , composite material , programming language
Carbon supported cobalt nickel selenide (Co,Ni) Se 2 /C ternary catalysts were prepared by a simple microwave‐assisted polyol method. The effects of the Co amount ( x ), in terms of the Co content over the total amounts of Co and Ni presented in (Co x Ni 1 ‐x ) Se 2 /C ( x= 0, 0.25, 0.33, 0.50, 0.67, 0.75 and 1.0), on the crystal structures, surface morphologies, microstructures, electrocatalytic activities and stabilities toward oxygen reduction reaction (ORR) were systematically investigated. It was found that the incorporation of Co into NiSe 2 /C apparently reduced the average crystallite sizes of the as‐prepared (Co x Ni 1 ‐x ) Se 2 /C (0 0.5), in particular, with (Co 0.75 Ni 0.25 ) Se 2 /C which showed no loss in E ORR after 1000 cycles. The excessive amount of Co introduced into NiSe 2 /C resulted in the coexistence of a cubic (Co x Ni 1 ‐x ) Se 2 single crystallite and an orthogonal CoSe 2 polycrystallite, which might be beneficial to inhibit the grain growth and to provide more active sites. Furthermore, the formation of (Co x Ni 1 ‐x ) Se 2 might provide more stable structure for the ternary (Co 0.75 Ni 0.25 ) Se 2 /C to impede the Se oxidation.