Size-dependent oxygen reduction property of octahedral Pt–Ni nanoparticle electrocatalysts
Abstract
The size effect on the electrocatalytic property of octahedral Pt–Ni alloy nanoparticles in the oxygen reduction reaction (ORR) was studied by making particles with different sizes and conducting electrochemical measurements. Octahedral Pt–Ni nanoparticles on carbon support (Pt–Ni/C) were produced using a facile and surfactant-free solid-state chemistry method. Two groups of octahedral Pt–Ni/C, including Pt3Ni/C and Pt1.5Ni/C, with particle size ranging from around 4 to 8 nm were prepared. Both the ORR activity and the stability of the two group catalysts were studied, which exhibited varying dependence over the particle size. The different relationships between the Pt–Ni size and the ORR property were investigated and attributed to alterations in the particle electronic/geometric structure and the Ni leaching behaviour.
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The maximal mass activity at 2.2 nm for octahedral Pt1.5Ni was explained based on density functional theory calculations performed on fully relaxed NPs.
“They explained the maximal mass activity at 2.2 nm based on density functional theory calculations performed on fully relaxed NPs.97”
From A comprehensive review of Pt electrocatalysts for the oxygen reduction reaction: Nanostructure, activity, mechanism and carbon support in PEM fuel cells (2017) · cites this paper as [97]
Octahedral Pt1.5Ni/C exhibited a volcano relationship between ORR activity and Pt1.5Ni size, caused by the interplay between lower stability and a higher fraction of (111) terraces of the larger octahedral Pt1.5Ni particles.
“In comparison, the octahedral Pt 1.5 Ni/C exhibited a different size dependency on ORR activity, a volcano relationship between the ORR activity and the Pt 1.5 Ni size, which could be caused by the interplay between lower stability and a higher fraction of (111) terraces of the larger octahedral Pt 1.5 Ni particles.”
From A comprehensive review of Pt electrocatalysts for the oxygen reduction reaction: Nanostructure, activity, mechanism and carbon support in PEM fuel cells (2017) · cites this paper as [97]
For Pt alloys with two compositions, the relationship of size-ORR activity relies on the surface.
“Pt alloys with two compositions demonstrated that the relationship of size-ORR activity relies on the surface.97”
From A comprehensive review of Pt electrocatalysts for the oxygen reduction reaction: Nanostructure, activity, mechanism and carbon support in PEM fuel cells (2017) · cites this paper as [97]
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Self-citation
- Authors
- Zhang, C., Hwang, S. Y., & Peng, Z.
- Affiliations
- University of Akron (US)
- Corresponding author
- Peng, Zhenmeng
- Venue
- J. Mater. Chem. A
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2014-10-09
- Volume
- 2
- Issue
- 46
- Pages
- 19778-19787
- ISSN
- 2050-7488 (ISSN-L)
- 2050-7496
- OpenAlex
- W2097901161
- Cited by
- 71
- References
- 3
- Citations by year
- 2026: 2 · 2025: 3 · 2024: 3 · 2023: 4 · 2022: 9 · 2021: 5 · 2020: 3 · 2019: 4 · 2018: 6 · 2017: 10 · 2016: 12 · 2015: 10
- FWCI
- 3.52
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Materials Chemistry A (publishedVersion)
- Funders
- University of Akron
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Materials Science › Materials Chemistry › Catalytic Processes in Materials Science
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
- Keywords
- oxygen reduction reaction, octahedral nanoparticles, particle size effects, electrocatalysts, Pt3Ni, solid-state synthesis, surfactant-free synthesis, carbon-supported catalysts, catalyst stability, electronic structure, geometric structure
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