TY - JOUR
T1 - Cobalt sulfides as efficient catalyst towards oxygen reduction reactions
AU - Yao, Shuo
AU - Huang, Taizhong
AU - Fang, Hengyi
AU - Yu, Jiemei
AU - Meganathan, Mayilvel Dinesh
AU - Cui, Zhaoxin
AU - Yuan, Xianxia
N1 - Funding Information:
This project was financially supported National Natural Science Foundation of China (No. 21476138), Shandong Provincial Natural Science Foundation (No. ZR2018MB036), Science Development Project of Shandong Province (Nos. 2017GGX40115 and 2016GGX102038), Project of Shandong Province Higher Educational Science and Technology Program (Nos. J17KA094, J13LD08).
Funding Information:
This project was financially supported National Natural Science Foundation of China (No. 21476138 ), Shandong Provincial Natural Science Foundation (No. ZR2018MB036 ), Science Development Project of Shandong Province (Nos. 2017GGX40115 and 2016GGX102038 ), Project of Shandong Province Higher Educational Science and Technology Program (Nos. J17KA094 , J13LD08 ).
Publisher Copyright:
© 2020 The Author
PY - 2020/2/1
Y1 - 2020/2/1
N2 - Developing low-cost and high performance catalysts to replace precious metal based catalysts for oxygen reduction reaction (ORR) is one of the most feasible ways to promote the commercial application of fuel cells. In this work, flower-like CoS and octahedral CoS2 are synthesized by a facile one-pot hydrothermal method without any adjunction of surfactants or follow-up thermolysis, their catalytic performance towards ORR in alkaline electrolyte are comparatively investigated. The results reveal that CoS2 outperforms CoS owing to the higher electron density around S[sbnd]S bond of S2 2- in the crystal structure, which promotes the adsorption of oxygen on catalyst surface and facilitates the breakage of O[sbnd]O bond in oxygen, leading to direct 4-electron transfer ORR. When CoS2 particles are dispersed on the surface of rGO with large surface area, their ORR performance could be further improved.
AB - Developing low-cost and high performance catalysts to replace precious metal based catalysts for oxygen reduction reaction (ORR) is one of the most feasible ways to promote the commercial application of fuel cells. In this work, flower-like CoS and octahedral CoS2 are synthesized by a facile one-pot hydrothermal method without any adjunction of surfactants or follow-up thermolysis, their catalytic performance towards ORR in alkaline electrolyte are comparatively investigated. The results reveal that CoS2 outperforms CoS owing to the higher electron density around S[sbnd]S bond of S2 2- in the crystal structure, which promotes the adsorption of oxygen on catalyst surface and facilitates the breakage of O[sbnd]O bond in oxygen, leading to direct 4-electron transfer ORR. When CoS2 particles are dispersed on the surface of rGO with large surface area, their ORR performance could be further improved.
KW - Catalysts
KW - Catalytic performance
KW - Cobalt sulfides
KW - Oxygen reduction reaction
KW - Reduced graphene oxide
UR - http://www.scopus.com/inward/record.url?scp=85066106197&partnerID=8YFLogxK
U2 - 10.1016/j.cclet.2019.04.069
DO - 10.1016/j.cclet.2019.04.069
M3 - Article
AN - SCOPUS:85066106197
SN - 1001-8417
VL - 31
SP - 530
EP - 534
JO - Chinese Chemical Letters
JF - Chinese Chemical Letters
IS - 2
ER -