Ruthenium Core-Shell Engineering with Nickel Single Atoms for Selective Oxygen Evolution via Nondestructive Mechanism
- Authors
- Harzandi, Ahmad M.; Shadman, Sahar; Nissimagoudar, Arun S.; Kim, Dong Yeon; Lim, Hee-Dae; Lee, Jong Hoon; Kim, Min Gyu; Jeong, Hu Young; Kim, Youngsik; Kim, Kwang S.
- Issue Date
- Mar-2021
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- lattice oxygen; leaching; mechanism; nickel; oxygen evolution reaction; ruthenium; surface engineering
- Citation
- ADVANCED ENERGY MATERIALS, v.11, no.10, pp.1 - 12
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED ENERGY MATERIALS
- Volume
- 11
- Number
- 10
- Start Page
- 1
- End Page
- 12
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/186228
- DOI
- 10.1002/aenm.202003448
- ISSN
- 1614-6832
- Abstract
- To develop effective electrocatalytic splitting of acidic water, which is a key reaction for renewable energy conversion, the fundamental understanding of sluggish/destructive mechanism of the oxygen evolution reaction (OER) is essential. Through investigating atom/proton/electron transfers in the OER, the distinctive acid-base (AB) and direct-coupling (DC) lattice oxygen mechanisms (LOMs) and adsorbates evolution mechanism (AEM) are elucidated, depending on the surface-defect engineering condition. The designed catalysts are composed of a compressed metallic Ru-core and oxidized Ru-shell with Ni single atoms (SAs). The catalyst synthesized with hot acid treatment selectively follows AB-LOM, exhibiting simultaneously enhanced activity and stability. It produces a current density of 10/100 mA cm(-2) at a low overpotential of 184/229 mV and sustains water oxidation at a high current density of up to 20 mA cm(-2) over approximate to 200 h in strongly acidic media.
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