Amorphous Metallic NiFeP: A Conductive Bulk Material Achieving High Activity for Oxygen Evolution Reaction in Both Alkaline and Acidic Media

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  • Fei Hu
    School of Materials Science and Engineering Tongji University Shanghai 201804 P. R. China
  • Shengli Zhu
    School of Materials Science and Engineering Tianjin University Tianjin 300072 P. R. China
  • Shuangming Chen
    Hefei National Laboratory for Physical Sciences at the Microscale iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 P. R. China
  • Yu Li
    Hefei National Laboratory for Physical Sciences at the Microscale iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 P. R. China
  • Lu Ma
    X‐ray Science Division Argonne National Laboratory Argonne IL 60439 USA
  • Tianpin Wu
    X‐ray Science Division Argonne National Laboratory Argonne IL 60439 USA
  • Yan Zhang
    Institute for Materials Research Tohoku University Aobaku Sendai 980‐8577 Japan
  • Chengming Wang
    Hefei National Laboratory for Physical Sciences at the Microscale iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 P. R. China
  • Congcong Liu
    School of Materials Science and Engineering Tongji University Shanghai 201804 P. R. China
  • Xianjin Yang
    School of Materials Science and Engineering Tianjin University Tianjin 300072 P. R. China
  • Li Song
    Hefei National Laboratory for Physical Sciences at the Microscale iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 P. R. China
  • Xiaowei Yang
    School of Materials Science and Engineering Tongji University Shanghai 201804 P. R. China
  • Yujie Xiong
    Hefei National Laboratory for Physical Sciences at the Microscale iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 P. R. China

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<jats:p>The intrinsic catalytic activity at 10 mA cm<jats:sup>−2</jats:sup> for oxygen evolution reaction (OER) is currently working out at overpotentials higher than 320 mV. A highly efficient electrocatalyst should possess both active sites and high conductivity; however, the loading of powder catalysts on electrodes may often suffer from the large resistance between catalysts and current collectors. This work reports a class of bulk amorphous NiFeP materials with metallic bonds from the viewpoint of electrode design. The materials reported here perfectly combine high macroscopic conductivity with surface active sites, and can be directly used as the electrodes with active sites toward high OER activity in both alkaline and acidic electrolytes. Specifically, a low overpotential of 219 mV is achieved at the geometric current density 10 mA cm<jats:sup>−2</jats:sup> in an alkaline electrolyte, with the Tafel slope of 32 mV dec<jats:sup>−1</jats:sup> and intrinsic overpotential of 280 mV. Meanwhile, an overpotential of 540 mV at 10 mA cm<jats:sup>−2</jats:sup> is attained in an acidic electrolyte and stable for over 30 h, which is the best OER performance in both alkaline and acidic media. This work provides a different angle for the design of high‐performance OER electrocatalysts and facilitates the device applications of electrocatalysts.</jats:p>

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