articleJournal of the American Chemical SocietyJul 16, 2024Closed access

Nitrogen-Mediated Promotion of Cobalt-Based Oxygen Evolution Catalyst for Practical Anion-Exchange Membrane Electrolysis

PYPengcheng YuXZXiaolong ZhangTZTian-Yun ZhangXTXuyingnan TaoYYYang Yu

University of Science and Technology of China · Hefei National Center for Physical Sciences at Nanoscale

PubMed
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Abstract

Scarce and expensive iridium oxide is still the cornerstone catalyst of polymer-electrolyte membrane electrolyzers for green hydrogen production because of its exceptional stability under industrially relevant oxygen evolution reaction (OER) conditions. Earth-abundant transition metal oxides used for this task, however, show poor long-term stability. We demonstrate here the use of nitrogen-doped cobalt oxide as an effective iridium substitute. The catalyst exhibits a low overpotential of 240 mV at 10 mA cm–2 and negligible activity decay after 1000 h of operation in an alkaline electrolyte. Incorporation of nitrogen dopants not only triggers the OER mechanism switched from the traditional adsorbate evolution…

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118
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Authors

11

Topics & keywords

Topics
Keywords
  • Chemistry
  • Cobalt
  • Electrolysis
  • Catalysis
  • Inorganic chemistry
  • Ion exchange
  • Nitrogen
  • Membrane
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