Immiscible bi-metal single-atoms driven synthesis of electrocatalysts having superb mass-activity and durability
SCIE
SCOPUS
- Title
- Immiscible bi-metal single-atoms driven synthesis of electrocatalysts having superb mass-activity and durability
- Authors
- PARK, JAE HOON; Ahmad M. Harzandi; Sahar Shadman; Miran Ha; Chang Woo Myung; Dong Yeon Kim; Hyo Ju Park; Siraj Sultan; Woo-Suk Noh; Wanggeun Lee; Pandiarajan Thangavel; Woo Jin Byun; Seong-hun Lee; Jitendra N. Tiwari; Tae Joo Shin; Zonghoon Lee; Jae Sung Lee; Kwang S. Kim
- Date Issued
- 2020-08-05
- Publisher
- ELSEVIER
- Abstract
- Properties of metal elements can be modified by alloying. Given that catalytic efficiencies are often maximized using metal single-atoms (SAs), two immiscible metals can improve the catalytic activity when they can be present as non-agglomerated dual SAs. Here, we report yet-unexplored synthesis of high-performance electro-catalysts utilizing immiscibility of Cu/Ru bimetal atoms. In the synthesized electrocatalyst (Cu/Ru@G(N)), both Cu-SAs and Ru-SAs are dispersed on N-doped graphitic-matrix (GN), while other Cu-SAs are bridged to Ru nanoparticles (NPs) surface via nitrogen. It shows superior mass-activity with outstanding catalytic performance and durability for hydrogen evolution reaction (HER), outperforming commercial Pt-20wt%/C. Cu-SAs along with Ru-NPs enhance electric conduction or charge-transfer rate of GN-templates for fast kinetics. Owing to Cu-Ru immiscibility, the coordination of Cu-SAs by N atoms which bridge to Ru-NPs surface, introduces new active sites and brings about long-term stability (over 600 h in acidic media) by preventing aggregation of Ru-NPs.
- Keywords
- SOLUTION ALLOY NANOPARTICLES; OXYGEN REDUCTION REACTION; EVOLUTION REACTION; HYDROGEN; PERFORMANCE; EFFICIENT; CLUSTERS; RU; CATALYST; SITES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/103329
- DOI
- 10.1016/j.apcatb.2020.118896
- ISSN
- 0926-3373
- Article Type
- Article
- Citation
- APPLIED CATALYSIS B-ENVIRONMENTAL, vol. 270, 2020-08-05
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