| 학회 |
한국재료학회 |
| 학술대회 |
2021년 봄 (05/12 ~ 05/14, 광주 김대중컨벤션센터) |
| 권호 |
27권 1호 |
| 발표분야 |
특별심포지엄 5. 에너지 변환소재 심포지엄-오거나이저: 심욱(전남대) |
| 제목 |
Manipulating dynamic surface transformation of electrocatalysts for superior water oxidation |
| 초록 |
Rationally manipulating the in-situ formed catalytically-active surface of catalysts remains a tremendous challenge for highly-efficient water electrolysis. Here we present a cationic redox-tuning method to redirect dynamic surface restructuring from the same parent structure, for electrochemical oxygen evolution reaction (OER). Partially replacing oxygen of the layered transition metal oxides with halide modified redox transitions during the OER, which was monitored by operando X-ray absorption spectroscopy. Surface-restructured transition metal oxides showed an OER activity approximately two orders of magnitude higher than that of benchmark RuO2 and sustained this high activity for 500 h without degradation, making it among the best OER electrocatalysts ever reported. This work makes a stride in modulating surface restructuring and opens up new opportunities to design superior OER electrocatalysts via tuning cationic redox. |
| 저자 |
Jian Wang1, Se-Jun Kim2, Hyungjun Kim3, Jongwoo Lim4
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| 소속 |
1Department of Chemistry, 2College of Science, 3Seoul National Univ., 4Seoul |
| 키워드 |
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| E-Mail |
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