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Hollow Nanocages of Ni_xCo_(1-x)Se for Efficient Zinc–Air Batteries and Overall Water Splitting
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  • 英文篇名:Hollow Nanocages of Ni_xCo_(1-x)Se for Efficient Zinc–Air Batteries and Overall Water Splitting
  • 作者:Zhengxin ; Qian ; Yinghuan ; Chen ; Zhenghua ; Tang ; Zhen ; Liu ; Xiufang ; Wang ; Yong ; Tian ; Wei ; Gao
  • 英文作者:Zhengxin Qian;Yinghuan Chen;Zhenghua Tang;Zhen Liu;Xiufang Wang;Yong Tian;Wei Gao;School of Pharmacy,Guangdong Pharmaceutical University;Guangzhou Key Laboratory for Surface Chemistry of Energy Materials,New Energy Research Institute,School of Environment and Energy,South China University of Technology,Guangzhou Higher Education Mega Center;Guangdong Engineering and Technology Research Center for Surface Chemistry of Energy Materials,School of Environment and Energy,South China University of Technology,Guangzhou Higher Education Mega Centre;Department of Physics and Engineering,Frostburg State University;
  • 英文关键词:Ni_xCo_(1-x)Se hollow nanocages;;Oxygen evolution reaction;;Hydrogen evolution reaction;;Rechargeable/all-solid-state zinc–air battery;;Overall water splitting
  • 中文刊名:NANO
  • 英文刊名:纳微快报(英文)
  • 机构:School of Pharmacy,Guangdong Pharmaceutical University;Guangzhou Key Laboratory for Surface Chemistry of Energy Materials,New Energy Research Institute,School of Environment and Energy,South China University of Technology,Guangzhou Higher Education Mega Center;Guangdong Engineering and Technology Research Center for Surface Chemistry of Energy Materials,School of Environment and Energy,South China University of Technology,Guangzhou Higher Education Mega Centre;Department of Physics and Engineering,Frostburg State University;
  • 出版日期:2019-06-15
  • 出版单位:Nano-Micro Letters
  • 年:2019
  • 期:v.11
  • 基金:the Guangzhou Science and Technology Plan Projects(No.201804010323);; the Guangdong Natural Science Funds for Distinguished Young Scholars(No.2015A030306006);; the Guangdong Innovative and Entrepreneurial Research Team Program(No.2014ZT05N200);; the Fundamental Research Funds for the Central Universities(SCUT Grant No.2018ZD022);; the Project for Natural Science Foundation of Guangdong Province(No.2018A030313178);; the funding support from the Natural Science Foundation of Guangdong Province(No.2015A030310176)
  • 语种:英文;
  • 页:NANO201902010
  • 页数:17
  • CN:02
  • ISSN:31-2103/TB
  • 分类号:140-156
摘要
Developing Earth-abundant,highly efficient,and anticorrosion electrocatalysts to boost the oxygen evolution reaction(OER),oxygen reduction reaction(ORR),and hydrogen evolution reaction(HER) for the Zn–air battery(ZAB) and for overall water splitting is imperative.In this study,a novel process starting with Cu_2O cubes was developed to fabricate hollow Ni_xCo_(1-x)Se nanocages as trifunctional electrocatalysts for the OER,ORR,and HER and a reasonable formation mechanism was proposed.The Ni_(0.2)Co_(0.8)Se nanocages exhibited higher OER activity than its counterparts with the low overpotential of 280 mV at 10 mA cm~(-2).It also outperformed the other samples in the HER test with a low overpotential of 73 mV at 10 mA cm~(-2).As an air–cathode of a self-assembled rechargeable ZAB,it exhibited good performance,such as an ultralong cycling lifetime of > 50 h,a high round-trip efficiency of 60.86%,and a high power density of 223.5 mW cm~(-2).For the application in self-made all-solid-state ZAB,it also demonstrated excellent performance with a power density of 41.03 mW cm~(-2) and an open-circuit voltage of 1.428 V.In addition,Ni_(0.2)Co_(0.8)Se nanocages had superior performance in a practical overall water splitting,in which only 1.592 V was needed to achieve a current density of 10 mA cm~(-2).These results show that hollow Ni_xCo_(1-x)Se nanocages with an optimized Ni-to-Co ratio are a promising cost-effective and high-efficiency electrocatalyst for ZABs and overall water splitting in alkaline solutions.
        Developing Earth-abundant,highly efficient,and anticorrosion electrocatalysts to boost the oxygen evolution reaction(OER),oxygen reduction reaction(ORR),and hydrogen evolution reaction(HER) for the Zn–air battery(ZAB) and for overall water splitting is imperative.In this study,a novel process starting with Cu_2O cubes was developed to fabricate hollow Ni_xCo_(1-x)Se nanocages as trifunctional electrocatalysts for the OER,ORR,and HER and a reasonable formation mechanism was proposed.The Ni_(0.2)Co_(0.8)Se nanocages exhibited higher OER activity than its counterparts with the low overpotential of 280 mV at 10 mA cm~(-2).It also outperformed the other samples in the HER test with a low overpotential of 73 mV at 10 mA cm~(-2).As an air–cathode of a self-assembled rechargeable ZAB,it exhibited good performance,such as an ultralong cycling lifetime of > 50 h,a high round-trip efficiency of 60.86%,and a high power density of 223.5 mW cm~(-2).For the application in self-made all-solid-state ZAB,it also demonstrated excellent performance with a power density of 41.03 mW cm~(-2) and an open-circuit voltage of 1.428 V.In addition,Ni_(0.2)Co_(0.8)Se nanocages had superior performance in a practical overall water splitting,in which only 1.592 V was needed to achieve a current density of 10 mA cm~(-2).These results show that hollow Ni_xCo_(1-x)Se nanocages with an optimized Ni-to-Co ratio are a promising cost-effective and high-efficiency electrocatalyst for ZABs and overall water splitting in alkaline solutions.
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