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Ni3 N as an Active Hydrogen Oxidation Reaction Catalyst in Alkaline Medium.
Journal article

Ni3 N as an Active Hydrogen Oxidation Reaction Catalyst in Alkaline Medium.

  • Ni W Laboratory of Inorganic Synthesis and Catalysis (LSCI), Institute of Chemical Sciences and Engineering (ISIC), École Polytechnique Fédérale de Lausanne (EPFL), BCH 3305, Lausanne, 1015, Switzerland.
  • Krammer A Solar Energy and Building Physics Laboratory (LESO-PB), Institute of Civil Engineering (IIC), École Polytechnique Fédérale de Lausanne (EPFL), GC A0 391 (Bâtiment GC), 1015, Lausanne, Switzerland.
  • Hsu CS Department of Chemistry, National (Taiwan) University, Taipei, 10617, Taiwan.
  • Chen HM Department of Chemistry, National (Taiwan) University, Taipei, 10617, Taiwan.
  • Schüler A Solar Energy and Building Physics Laboratory (LESO-PB), Institute of Civil Engineering (IIC), École Polytechnique Fédérale de Lausanne (EPFL), GC A0 391 (Bâtiment GC), 1015, Lausanne, Switzerland.
  • Hu X Laboratory of Inorganic Synthesis and Catalysis (LSCI), Institute of Chemical Sciences and Engineering (ISIC), École Polytechnique Fédérale de Lausanne (EPFL), BCH 3305, Lausanne, 1015, Switzerland.
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  • 2019-04-06
Published in:
  • Angewandte Chemie (International ed. in English). - 2019
alkaline fuel cells
electrocatalysis
hydrogen evolution
hydrogen oxidation reaction
nickel
English Hydroxide-exchange membrane fuel cells can potentially utilize platinum-group-metal (PGM)-free electrocatalysts, offering cost and scalability advantages over more developed proton-exchange membrane fuel cells. However, there is a lack of non-precious electrocatalysts that are active and stable for the hydrogen oxidation reaction (HOR) relevant to hydroxide-exchange membrane fuel cells. Here we report the discovery and development of Ni3 N as an active and robust HOR catalyst in alkaline medium. A supported version of the catalyst, Ni3 N/C, exhibits by far the highest mass activity and break-down potential for a PGM-free catalyst. The catalyst also exhibits Pt-like activity for hydrogen evolution reaction (HER) in alkaline medium. Spectroscopy data reveal a downshift of the Ni d band going from Ni to Ni3 N and interfacial charge transfer from Ni3 N to the carbon support. These properties weaken the binding energy of hydrogen and oxygen species, resulting in remarkable HOR activity and stability.
Language
  • English
Open access status
closed
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Persistent URL
https://susi.usi.ch/global/documents/25611
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