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MOF‐Derived Hollow CoS Decorated with CeO x Nanoparticles for Boosting Oxygen Evolution Reaction Electrocatalysis
Author(s) -
Xu Huajie,
Cao Jing,
Shan Changfu,
Wang Bingkai,
Xi Pinxian,
Liu Weisheng,
Tang Yu
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201804673
Subject(s) - electrocatalyst , oxygen evolution , materials science , nanoparticle , nanocages , cobalt , nanostructure , chemical engineering , catalysis , transition metal , oxygen , nanotechnology , chemistry , electrode , electrochemistry , metallurgy , organic chemistry , engineering
Transition‐metal sulfides (TMSs) have emerged as important candidates for oxygen evolution reaction (OER) electrocatalysts. Now a hybrid nanostructure has been decorated with CeO x nanoparticles on the surface of ZIF‐67‐derived hollow CoS through in situ generation. Proper control of the amount of CeO x on the surface of CoS can achieve precise tuning of Co 2+ /Co 3+ ratio, especially for the induced defects, further boosting the OER activity. Meanwhile, the formation of protective CeO x thin layer effectively inhibits the corrosion by losing cobalt ion species from the active surface into the solution. It is thus a rare example of a hybrid hetero‐structural electrocatalyst with CeO x NPs to improve the performance of the hollow TMS nanocage.