DataVXSmall MethodsPaper
journal article·2025-12

Degradation Behavior of Co 3 O 4 Spinel OER Catalyst Under Dynamic Operation and Thermally Driven Healing in Alkaline Water Electrolysis

Myeongmin Seo, Young Hwa Yun, Gisu Doo, Hyeonjung Park, Sungtak Kim, Won‐Chul Cho, Chang‐Hee Kim, Changsoo Lee, Sechan Lee, MinJoong Kim, Hyun‐Seok Cho

Small Methods· Volume 9· Issue 12
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Source abstract

Abstract

Abstract Green hydrogen production suffers from the intermittent nature of renewable energy resources, which accelerates the degradation of electrocatalysts in water electrolyzers. Therefore, it is crucial to minimize the catalyst degradation under dynamic operating conditions. This study investigated the degradation behavior of an oxygen evolution reaction catalyst under two types of dynamic operation via controlling the voltage range, elapsed time at high voltage, and power fluctuation frequency. High‐voltage operation and short start/stop periods caused severe catalyst degradation. In addition, chemical and physical characterization identified the formation of amorphous Co(OH) 2 and defects as key factors in Co 3 O 4 degradation. These results indicated that it is possible to respond to dynamic operation by understanding how the degradation phenomenon is intensified by dynamic operating conditions. In addition, a thermal‐healing method is investigated for degraded catalysts, which restores defects by inducing atomic rearrangement toward the original crystal structure, returning the Co 3 O 4 catalyst to its initial performance. The results indicated that a suitable restoration strategy targeting the origin of the catalyst degradation can lead to the realization of a water electrolyzer capable of long‐term operation.
Source: crossref · Quality: baseline

Research context

Catalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Hybrid Renewable Energy Systems · Chemical Looping and Thermochemical Processes

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Hydrogen Research Department Korea Institute of Energy Research 152 Gajeong‐ro, Yuseong‐gu Dajeon 34129 Republic of Korea

Department of Chemical Engineering and Applied Chemistry Chungnam National University 99 daehak‐ro, Yuseong‐gu Dajeon 34134 Republic of Korea

Department of Furture Energy Convergence Seoul National University of Science & Technology Nowon‐gu Seoul 01811 Republic of Korea

School of Energy Technology Hydrogen Energy Korea Institute of Energy Technology 21, KENTECH‐gil Naju‐si Jeonnam 58330 Republic of Korea

Department of Chemical Engineering Education Chungnam National University 99 daehak‐ro, Yuseong‐gu Dajeon 34134 Republic of Korea

Department of Chemistry Kookmin University 77 Jeongneung‐ro Seoul Seongbuk‐gu 02707 Republic of Korea

Department of Applied Chemistry Kookmin University 77 Jeongneung‐ro Seoul Seongbuk‐gu 02707 Republic of Korea

Departemnt of Materials Science and Engineering Kyung Hee University 1732 Deogyeong‐daero, Giheung‐gu Yongin Gyeonggi‐do 17104 Republic of Korea

Department of Chemical and Biomolecular Engineering Sogang University 35 Baekbeom‐ro, Mapo‐gu Seoul 04107 Republic of Korea

Institute of Emergent Materials Sogang University 35 Baekbeom‐ro, Mapo‐gu Seoul 04107 Republic of Korea

Institute of Energy and Environmental Technology Sogang University 35 Baekbeom‐ro, Mapo‐gu Seoul 04107 Republic of Korea

Funding

Ministry of Trade, Industry and Energy

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