Modifying redox properties and local bonding of Co3O4 by CeO2 enhances oxygen evolution catalysis in acid
Jinzhen Huang,Jinzhen Huang,Hongyuan Sheng,R. Dominic Ross,Jiecai Han,Xianjie Wang,Bo Song,Song Jin +7 more
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In this article, a nanocrystalline CeO2 in a Co3O4/CeO2 nanocomposite was shown to modify the redox properties of Co3 O4 and enhance its intrinsic oxygen evolution reaction activity.Abstract:
Developing efficient and stable earth-abundant electrocatalysts for acidic oxygen evolution reaction is the bottleneck for water splitting using proton exchange membrane electrolyzers. Here, we show that nanocrystalline CeO2 in a Co3O4/CeO2 nanocomposite can modify the redox properties of Co3O4 and enhances its intrinsic oxygen evolution reaction activity, and combine electrochemical and structural characterizations including kinetic isotope effect, pH- and temperature-dependence, in situ Raman and ex situ X-ray absorption spectroscopy analyses to understand the origin. The local bonding environment of Co3O4 can be modified after the introduction of nanocrystalline CeO2, which allows the CoIII species to be easily oxidized into catalytically active CoIV species, bypassing the potential-determining surface reconstruction process. Co3O4/CeO2 displays a comparable stability to Co3O4 thus breaks the activity/stability tradeoff. This work not only establishes an efficient earth-abundant catalysts for acidic oxygen evolution reaction, but also provides strategies for designing more active catalysts for other reactions.read more
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NiMoO4@Co3O4 Core–Shell Nanorods: In Situ Catalyst Reconstruction toward High Efficiency Oxygen Evolution Reaction
Getachew Solomon,Anton Landström,Raffaello Mazzaro,Matteo Jugovac,Paolo Moras,Elti Cattaruzza,Vittorio Morandi,Isabella Concina,Alberto Vomiero,Alberto Vomiero +9 more
TL;DR: In this paper, the potential of a core-shell structure of hydrous NiMoO4 micromachines was investigated for water splitting in the presence of hydroxide.
Journal ArticleDOI
Advances in Oxygen Evolution Electrocatalysts for Proton Exchange Membrane Water Electrolyzers
Zhichao Chen,Lei Guo,Lun Pan,Tianqing Yan,Zexing He,Yue Li,Chengxiang Shi,Zhen-Feng Huang,Xiang Wen Zhang,Ji-Jun Zou +9 more
TL;DR: In this article , an in-depth understanding of oxygen evolution reaction mechanisms including the adsorption evolution mechanism and lattice oxygen evolution mechanism is first provided to aid development of innovative materials and elucidate the origin of catalyst degradation.
Journal ArticleDOI
Surface Reconstruction of Water Splitting Electrocatalysts
Ye Zeng,Mengting Zhao,Zi-Ling Huang,Weijie Zhu,Jiaxian Zheng,Qiu Jiang,Zhoucheng Wang,Hanfeng Liang +7 more
TL;DR: In this paper , a review summarizes recent progress in the regulation strategies for reconstruction reactions of electrocatalysts during a catalytic reaction has been discovered, which could form reactive sites for both the oxygen evolution and hydrogen evolution reactions.
Journal ArticleDOI
Dynamic Dissolution and Re-adsorption of Molybdate Ion in Iron Incorporated Nickel-molybdenum Oxyhydroxide for Promoting Oxygen Evolution Reaction
Hanxiao Liao,Xiaodong Zhang,Shu Juan Niu,Pengfei Tan,Kejun Chen,Yong Liu,Gongming Wang,Min Liu,Jun Pan +8 more
TL;DR: In this paper , the effect of escaped inactive ion from pre-catalysts themselves is usually ignored during reconstruction processes, which delivers a promoting effect on OER performance, and an efficient electrocatalyst of Fe incorporated NiMo oxyhydroxide is prepared through an electrochemical strategy for OER.
Journal ArticleDOI
Current and future trends for spinel-type electrocatalysts in electrocatalytic oxygen evolution reaction
TL;DR: In this paper , the authors summarized the recent progress of spinel-based catalysts with modified electronic configurations and their applications in OER and highlighted some advanced strategies for engineering spinels.
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