Exploring the Dominant Role of Atomic- and Nano-Ruthenium as Active Sites for Hydrogen Evolution Reaction in Both Acidic and Alkaline Mediaopen access
- Authors
- Zhang, Lijie; Jang, Haeseong; Wang, Yan; Li, Zijian; Zhang, Wei; Kim, Min Gyu; Yang, Dongjiang; Liu, Shangguo; Liu, Xien; Cho, Jaephil
- Issue Date
- Aug-2021
- Publisher
- WILEY
- Keywords
- electrocatalysts; hydrogen evolution reaction; metal-organic supramolecules; ruthenium; single atoms
- Citation
- ADVANCED SCIENCE, v.8, no.15
- Journal Title
- ADVANCED SCIENCE
- Volume
- 8
- Number
- 15
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/69287
- DOI
- 10.1002/advs.202004516
- ISSN
- 2198-3844
2198-3844
- Abstract
- Ru nanoparticles (NPs) and single atoms (SAs)-based materials have been investigated as alternative electrocatalysts to Pt/C for hydrogen evolution reaction (HER). Exploring the dominant role of atomic- and nano-ruthenium as active sites in acidic and alkaline media is very necessary for optimizing the performance. Herein, an electrocatalyst containing both Ru SAs and NPs anchored on defective carbon (RuSA+NP/DC) has been synthesized via a Ru-alginate metal-organic supramolecules conversion method. RuSA+NP/DC exhibits low overpotentials of 16.6 and 18.8 mV at 10 mA cm(-2) in acidic and alkaline electrolytes, respectively. Notably, its mass activities are dramatically improved, which are about 1.1 and 2.4 times those of Pt/C at an overpotential of 50 mV in acidic and alkaline media, respectively. Theoretical calculations reveal that Ru SAs own the most appropriate H* adsorption strength and thus, plays a dominant role for HER in acid electrolyte, while Ru NPs facilitate the dissociation of H2O that is the rate-determining step in alkaline electrolyte, leading to a remarkable HER activity.
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