IHEP OpenIR
Electrochemical etching of alpha-cobalt hydroxide for improvement of oxygen evolution reaction
Liu, PF; Yang, S; Zheng LR(郑黎荣); Zheng, LR; Zhang, B; Yang, HG
2016
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
EISSN2050-7496
Volume4Issue:24Pages:9578-9584
SubtypeArticle
AbstractExploring low-cost and high-efficiency electrocatalysts for oxygen evolution reaction (OER) is of paramount importance to develop large-scale alkaline water-splitting electrolyzers (AWEs). Cobalt-based materials have been widely studied because of their promising activity and abundance. However, exposing more active sites for cobalt-based electrocatalysts with enhanced activity and durability still remains as a great challenge. Herein, we demonstrate that chlorine intercalated alpha-type cobalt hydroxide can be electrochemically etched to form a highly active OER catalyst, achieving a current density of 10 mA cm(-2) at an OER overpotential of similar to 320 mV. The improvement in the OER activity can be ascribed to the dechlorination induced defective structures and in situ formation of cobalt oxyhydroxide fragments as active sites via anodic polarization. Our findings suggest a novel strategy of electrochemical etching of chlorine containing hydroxide catalysts to obtain defective oxyhydroxides for continuous electrochemical water splitting.
DOI10.1039/c6ta04078k
WOS KeywordEFFICIENT WATER OXIDATION ; ALKALINE-SOLUTION ; NANOSHEET ARRAYS ; OXIDE SURFACES ; ELECTROCATALYSTS ; CATALYSTS ; SPECTROSCOPY ; NANOPARTICLES ; OXYHYDROXIDE ; ELECTRODES
Indexed BySCI
Language英语
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS IDWOS:000378946700029
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Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/260274
Collection中国科学院高能物理研究所
Affiliation中国科学院高能物理研究所
Recommended Citation
GB/T 7714
Liu, PF,Yang, S,Zheng LR,et al. Electrochemical etching of alpha-cobalt hydroxide for improvement of oxygen evolution reaction[J]. JOURNAL OF MATERIALS CHEMISTRY A,2016,4(24):9578-9584.
APA Liu, PF,Yang, S,郑黎荣,Zheng, LR,Zhang, B,&Yang, HG.(2016).Electrochemical etching of alpha-cobalt hydroxide for improvement of oxygen evolution reaction.JOURNAL OF MATERIALS CHEMISTRY A,4(24),9578-9584.
MLA Liu, PF,et al."Electrochemical etching of alpha-cobalt hydroxide for improvement of oxygen evolution reaction".JOURNAL OF MATERIALS CHEMISTRY A 4.24(2016):9578-9584.
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