Ultra-tiny Co(OH)2 particles supported on graphene oxide for highly efficient electrocatalytic water oxidation

Jiong Liu; Fuping Du; Haojie Zhang; Chao Lin; Peng Gao; Yuyun Chen; Zhifang Shi; Xiaopeng Li; Tiejun Zhao; Yuhan Sun

doi:10.1039/C5RA05706J

Ultra-tiny Co(OH)₂ particles supported on graphene oxide for highly efficient electrocatalytic water oxidation†

Jiong Liu,^ab Fuping Du,^a Haojie Zhang,^a Chao Lin,^a Peng Gao,^a Yuyun Chen,^a Zhifang Shi,^a Xiaopeng Li,*^a Tiejun Zhao*^a and Yuhan Sun^ac

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* Corresponding authors

^a CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201412, PR China
E-mail: lixp@sari.ac.cn, zhaotj@sari.ac.cn

^b University of Chinese Academy of Sciences, Beijing 100049, PR China

^c Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, PR China

Abstract

Here, we report a novel highly efficient cobalt-based catalyst for the oxygen evolution reaction (OER), which consists of ∼2 nm Co(OH)₂ clusters supported on graphene oxide (Co(OH)₂/GO). Compared with hydrothermally treated Co₃O₄/GO (HT-Co₃O₄/GO) reported in the literature, Co(OH)₂/GO shows comparable OER performance but with 42% less cobalt loading mass. The turnover frequency (TOF) of Co(OH)₂/GO is 2.8 times as high as that of HT-Co₃O₄/GO. Our result presents a new opportunity for researchers to design efficient OER electrocatalysts.

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Ultra-tiny Co(OH)₂ particles supported on graphene oxide for highly efficient electrocatalytic water oxidation†

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Ultra-tiny Co(OH)₂ particles supported on graphene oxide for highly efficient electrocatalytic water oxidation

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