Grafting Cobalt Diselenide on Defective Graphene for Enhanced Oxygen Evolution Reaction
Xin Wang,
Linzhou Zhuang,
Tianwei He,
Yi Jia,
Longzhou Zhang,
Xuecheng Yan,
Minrui Gao,
Aijun Du,
Zhonghua Zhu,
Xiangdong Yao,
Shu-Hong Yu
Affiliations
Xin Wang
Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, CAS Centre for Excellence in Nanoscience, Hefei Science Centre of CAS, University of Science and Technology of China, Hefei 230026, China; School of Natural Sciences and Queensland, Micro- and Nanotechnology Centre, Griffith University, Nathan Campus, Brisbane 4111, Australia
Linzhou Zhuang
School of Chemical Engineering, University of Queensland, Brisbane 4072, Australia
Tianwei He
School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
Yi Jia
School of Natural Sciences and Queensland, Micro- and Nanotechnology Centre, Griffith University, Nathan Campus, Brisbane 4111, Australia
Longzhou Zhang
School of Natural Sciences and Queensland, Micro- and Nanotechnology Centre, Griffith University, Nathan Campus, Brisbane 4111, Australia
Xuecheng Yan
School of Natural Sciences and Queensland, Micro- and Nanotechnology Centre, Griffith University, Nathan Campus, Brisbane 4111, Australia
Minrui Gao
Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, CAS Centre for Excellence in Nanoscience, Hefei Science Centre of CAS, University of Science and Technology of China, Hefei 230026, China
Aijun Du
School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
Zhonghua Zhu
School of Chemical Engineering, University of Queensland, Brisbane 4072, Australia
Xiangdong Yao
School of Natural Sciences and Queensland, Micro- and Nanotechnology Centre, Griffith University, Nathan Campus, Brisbane 4111, Australia; Corresponding author
Shu-Hong Yu
Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, CAS Centre for Excellence in Nanoscience, Hefei Science Centre of CAS, University of Science and Technology of China, Hefei 230026, China; Corresponding author
Summary: Cobalt diselenide (CoSe2) has been demonstrated to be an efficient and economic electrocatalyst for oxygen evolution reaction (OER) both experimentally and theoretically. However, the catalytic performance of up-to-now reported CoSe2-based OER catalysts is still far below commercial expectation. Herein, we report a hybrid catalyst consisting of CoSe2 nanosheets grafted on defective graphene (DG). This catalyst exhibits a largely enhanced OER activity and robust stability in alkaline solution (overpotential at 10 mA cm−2: 270 mV; Tafel plots: 64 mV dec−1). Both experimental evidence and density functional theory calculations reveal that the outstanding OER performance of this hybrid catalyst can be attributed to the synergetic effect of exposed cobalt atoms and carbon defects (electron transfer from CoSe2 layer to defect sites at DG). Our results suggest a promising way for the development of highly efficient and low-cost OER catalysts based on transition metal dichalcogenides. : Catalysis; Chemistry; Energy Materials Subject Areas: Catalysis, Chemistry, Energy Materials
