Self-supporting nanoporous Ni/metallic glass composites with hierarchically porous structure for efficient hydrogen evolution reaction
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2021年第14期
论文作者：Jing Wang Li You Zhibin Li Xiongjun Liu Rui Li Qing Du Xianzhen Wang Hui Wang Yuan Wu Suihe Jiang Zhaoping Lu
摘 要：Searching for free-standing and cost-efficient hydrogen evolution reaction （HER） electrocatalysts with high efficiency and excellent durability remains a great challenge for the hydrogen-based energy industry.Here,we report fabrication of a unique hierarchically porous structure,i.e.,nanoporous Ni （NPN）/metallic glass （MG） composite,through surface dealloying of the specially designed Ni40Zr40Ti20MG wire.This porous composite is composed of micrometer slits staggered with nanometer pores,which not only enlarges effective surface areas for the catalytic reaction,but also facilitates the release of H2 gas.As a result,the NPN/MG hybrid electrode exhibited the prominent HER performance with a low overpotential of 78 m V at 10 m A cm-2and Tafel slope of 42.4 m V dec-1,along with outstanding stability in alkaline solutions.Outstanding catalytic properties,combining with their free-standing capability and cost efficiency,make the current composite electrode viable for HER applications.
Jing Wang1，Li You1，Zhibin Li1，Xiongjun Liu1，Rui Li1,2，Qing Du1，Xianzhen Wang3，Hui Wang1，Yuan Wu1，Suihe Jiang1，Zhaoping Lu1
1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing2. Advanced Manufacturing Technology Research Centre, Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University3. Institute for Advanced Materials and Technology,University of Science and Technology Beijing
摘 要：Searching for free-standing and cost-efficient hydrogen evolution reaction （HER） electrocatalysts with high efficiency and excellent durability remains a great challenge for the hydrogen-based energy industry.Here,we report fabrication of a unique hierarchically porous structure,i.e.,nanoporous Ni （NPN）/metallic glass （MG） composite,through surface dealloying of the specially designed Ni40Zr40Ti20MG wire.This porous composite is composed of micrometer slits staggered with nanometer pores,which not only enlarges effective surface areas for the catalytic reaction,but also facilitates the release of H2 gas.As a result,the NPN/MG hybrid electrode exhibited the prominent HER performance with a low overpotential of 78 m V at 10 m A cm-2and Tafel slope of 42.4 m V dec-1,along with outstanding stability in alkaline solutions.Outstanding catalytic properties,combining with their free-standing capability and cost efficiency,make the current composite electrode viable for HER applications.
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