Rational design of Pt-Ni-Co ternary alloy nanoframe crystals as highly efficient catalysts toward the alkaline hydrogen evolution reaction
- Authors
- Oh, Aram; Sa, Young Jin; Hwang, Hyeyoun; Baik, Hionsuck; Kim, Jun; Kim, Byeongyoon; Joo, Sang Hoon; Lee, Kwangyeol
- Issue Date
- 28-Sep-2016
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- NANOSCALE, v.8, no.36, pp.16379 - 16386
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANOSCALE
- Volume
- 8
- Number
- 36
- Start Page
- 16379
- End Page
- 16386
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/87480
- DOI
- 10.1039/c6nr04572c
- ISSN
- 2040-3364
- Abstract
- The rational design of highly efficient electrocatalysts for the hydrogen evolution reaction ( HER) is of prime importance for establishing renewable and sustainable energy systems. The alkaline HER is particularly challenging as it involves a two-step reaction of water dissociation and hydrogen recombination, for which platinum-based binary catalysts have shown promising activity. In this work, we synthesized high performance platinum-nickel-cobalt alloy nanocatalysts for the alkaline HER through a simple synthetic route. This ternary nanostructure with a Cartesian-coordinate-like hexapod shape could be prepared by a one-step formation of core-dual shell Pt@Ni@Co nanostructures followed by a selective removal of the Ni@Co shell. The cobalt precursor brings about a significant impact on the control of size and shape of the nanostructure. The PtNiCo nanohexapods showed a superior alkaline HER activity to Pt/C and binary PtNi hexapods, with 10 times greater specific activity than Pt/C. In addition, the PtNiCo nanohexapods demonstrated excellent activity and durability for the oxygen reduction reaction in acidic media.
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