Topotactic transition of α-Co(OH)2 to β-Co(OH)2 anchored on CoO nanoparticles during electrochemical water oxidation: synergistic electrocatalytic effects

被引：50

作者：

Kundu, Sumana ^{[1
,2
]}

Malik, Bibhudatta ^{[1
]}

Prabhakaran, Amrutha ^{[1
]}

Pattanayak, Deepak K. ^{[1
,2
]}

Pillai, Vijayamohanan K. ^{[1
,2
]}

机构：

[1] CSIR, Cent Electrochem Res Inst, Karaikkudi 630003, Tamil Nadu, India

[2] Acad Sci & Innovat Res, Madras 600113, Tamil Nadu, India

来源：

CHEMICAL COMMUNICATIONS | 2017年 / 53卷 / 70期

关键词：

OXYGEN EVOLUTION; ALPHA-COBALT; EFFICIENT; CO3O4; HYDROXIDE; NANOSHEETS; CATALYST; BEHAVIOR; FILMS;

D O I：

10.1039/c7cc06086f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Herein, we report a single step, anionic surfactant-assisted, low temperature-hydrothermal synthetic strategy of CoO nanoparticles anchored on beta-Co(OH)(2) nanosheets which show a low overpotential (295 mV @ 10 mA cm(-2)) for the oxygen evolution reaction (OER). They also demonstrate much better kinetic parameters compared to the state-of-the-art RuO2. Interestingly, under the OER operational conditions (in alkaline medium), the topotactic transformation of alpha-Co(OH)(2) to a stable Brucite-like beta-Co(OH)(2) phase leads to a synergistic interaction between the beta-Co(OH)(2) sheets on the CoO nanoparticles for enhancing the OER electrocatalytic activity.

引用

收藏

页码：9809 / 9812

页数：4

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