Anion insertion enhanced electrodeposition of robust metal hydroxide/oxide electrodes for oxygen evolution

被引：473

作者：

Yan, Zhenhua ^{[1
]}

Sun, Hongming ^{[1
]}

Chen, Xiang ^{[1
]}

Liu, Huanhuan ^{[1
]}

Zhao, Yaran ^{[1
]}

Li, Haixia ^{[1
]}

Xie, Wei ^{[1
]}

Cheng, Fangyi ^{[1
]}

Chen, Jun ^{[1
,2
]}

机构：

[1] Nankai Univ, Coll Chem, Key Lab Adv Energy Mat Chem, Minist Educ, Tianjin 300071, Peoples R China

[2] Nankai Univ, Collaborat Innovat Ctr Chem Sci & Engn, Tianjin 300071, Peoples R China

来源：

NATURE COMMUNICATIONS | 2018年 / 9卷

关键词：

WATER OXIDATION; ELECTROCATALYSTS; PERFORMANCE; NUCLEATION; REDUCTION; CATALYSIS; GROWTH; OXIDES; FILMS; IRON;

D O I：

10.1038/s41467-018-04788-3

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Electrochemical deposition is a facile strategy to prepare functional materials but suffers from limitation in thin films and uncontrollable interface engineering. Here we report a universal electrosynthesis of metal hydroxides/oxides on varied substrates via reduction of oxyacid anions. On graphitic substrates, we find that the insertion of nitrate ion in graphene layers significantly enhances the electrodeposit-support interface, resulting in high mass loading and super hydrophilic/aerophobic properties. For the electrocatalytic oxygen evolution reaction, the nanocrystalline cerium dioxide and amorphous nickel hydroxide co-electrodeposited on graphite exhibits low overpotential (177 mV@10 mA cm(-2)) and sustains long-term durability (over 300 h) at a large current density of 1000 mA cm(-2). In situ Raman and operando X-ray diffraction unravel that the integration of cerium promotes the formation of electrocatalytically active gamma-phase nickel oxyhydroxide with exposed (003) facets. Therefore, combining anion intercalation with cathodic electrodeposition allows building robust electrodes with high electrochemical performance.

引用

页数：9

共 45 条

[1] Pulse-Electrodeposited Ni-Fe (Oxy)hydroxide Oxygen Evolution Electrocatalysts with High Geometric and Intrinsic Activities at Large Mass Loadings [J].