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Peer-reviewedCC BY-NC-NDChemSusChem

Catalysts for Acidic Oxygen Evolution Reaction

  • Guanghui Yang1,2
  • Jong-Min Lee1,2
  1. 1Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, Republic of Korea.
  2. 2Energy Science and Engineering Research Center, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, Republic of Korea.
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Abstract

The acidic oxygen evolution reaction (OER) is a key half-reaction underpinning proton exchange membrane water electrolysis (PEMWE), a promising technology for the industrial production of high-purity green hydrogen. However, under harsh acidic conditions of OER, even highly active metals are prone to corrosion and dissolution, leading to rapid performance degradation, particularly at industrially relevant current densities. Therefore, developing acidic OER catalysts that simultaneously exhibit high intrinsic activity with long-term stability remains a core scientific and engineering challenge for the practical deployment of PEMWE. This review first outlines the fundamental mechanisms of acidic OER, including the adsorbate evolution mechanism (AEM), the lattice oxygen mechanism (LOM), and the oxide path mechanism (OPM). It then summarizes recent advances in catalyst design and structure-property relationships, with emphasis on strategies for stabilizing Ru-based catalysts, reducing Ir loading while enhancing site efficiency in Ir-based systems, and developing platinum group metals (PGM)-free catalysts featuring acid-stable frameworks, corrosion-resistant architectures, and improved electronic conductivity. Finally, it discusses the remaining challenges and future directions in acidic OER catalysis, providing insights to guide the rational design of high-performance anode catalysts for next-generation PEMWE systems.

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Cite

BibTeXRIS
BibTeX
@article{yang2026catalysts,
  title = {{Catalysts for Acidic Oxygen Evolution Reaction}},
  author = {Guanghui Yang and Jong-Min Lee},
  journal = {ChemSusChem},
  year = {2026},
  month = oct,
  doi = {10.1002/cssc.71180},
  url = {https://europepmc.org/article/PMC/PMC13717575},
  note = {CC BY-NC-ND},
}
RIS
TY  - JOUR
TI  - Catalysts for Acidic Oxygen Evolution Reaction
AU  - Guanghui Yang
AU  - Jong-Min Lee
PY  - 2026
DA  - 2026/10/29
JO  - ChemSusChem
DO  - 10.1002/cssc.71180
UR  - https://europepmc.org/article/PMC/PMC13717575
AB  - The acidic oxygen evolution reaction (OER) is a key half-reaction underpinning proton exchange membrane water electrolysis (PEMWE), a promising technology for the industrial production of high-purity green hydrogen. However, under harsh acidic conditions of OER, even highly active metals are prone to corrosion and dissolution, leading to rapid performance degradation, particularly at industrially relevant current densities. Therefore, developing acidic OER catalysts that simultaneously exhibit high intrinsic activity with long-term stability remains a core scientific and engineering challenge for the practical deployment of PEMWE. This review first outlines the fundamental mechanisms of acidic OER, including the adsorbate evolution mechanism (AEM), the lattice oxygen mechanism (LOM), and the oxide path mechanism (OPM). It then summarizes recent advances in catalyst design and structure-property relationships, with emphasis on strategies for stabilizing Ru-based catalysts, reducing Ir loading while enhancing site efficiency in Ir-based systems, and developing platinum group metals (PGM)-free catalysts featuring acid-stable frameworks, corrosion-resistant architectures, and improved electronic conductivity. Finally, it discusses the remaining challenges and future directions in acidic OER catalysis, providing insights to guide the rational design of high-performance anode catalysts for next-generation PEMWE systems.
SN  - 1864-5631
SN  - 1864-564X
ER  -