Restructured Co-Ru alloys via electrodeposition for efficient hydrogen production in proton exchange membrane water electrolyzers
- Authors
- Lee, Taegyeom; Park, Yoonsu; Kim, Hoyoung; Hong, Yun-Kun; Hwang, Eunseo; Kim, Minyoung; Kim, Soo-Kil; Ha, Don-Hyung
- Issue Date
- May-2022
- Publisher
- WILEY
- Keywords
- cobalt-ruthenium alloy; electrodeposition; hydrogen evolution reaction; proton exchange membrane water electrolyzer
- Citation
- INTERNATIONAL JOURNAL OF ENERGY RESEARCH, v.46, no.6, pp 7975 - 7987
- Pages
- 13
- Journal Title
- INTERNATIONAL JOURNAL OF ENERGY RESEARCH
- Volume
- 46
- Number
- 6
- Start Page
- 7975
- End Page
- 7987
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/55020
- DOI
- 10.1002/er.7699
- ISSN
- 0363-907X
1099-114X
- Abstract
- The design of robust and high-performance hydrogen evolution reaction (HER) catalysts is crucial for the scalable production of hydrogen by electrochemical water splitting. In this work, we fabricated hierarchically porous Co-Ru catalysts with excellent catalytic activity and durability in acidic media. The morphology of the Co-Ru catalysts was successfully controlled through an optimized electrochemical process. Among all Co-Ru samples prepared in this study, the Co72Ru28 catalyst exhibited the largest catalytic surface area, as well as excellent HER activity (overpotential of 26.4 mV at -10 mA cm(-2)) and durability. X-ray photoelectron spectroscopy measurements revealed the electron transfer between Co and Ru, indicating that the formation of the Co-Ru alloy improved the activity and durability of the catalyst. Furthermore, a proton exchange membrane water electrolyzer (PEMWE) prepared with the Co72Ru28 sample showed excellent performances (3.4 A cm(-2) at 2.0 V-cell), illustrating the promising potential of the present Co-Ru catalysts as cathode materials for PEMWE systems.
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