Size Influence on the Oxygen Reduction Reaction Activity and Instability of Supported Pt Nanoparticles
Open accessAbstract
Size-dependent oxygen reduction reaction activity (ORR) and instability of Pt nanoparticles is of great importance in proton exchange membrane fuel cell applications. In this study, the size-dependence of ORR activity on Pt nanoparticles (NPs) was investigated on high-surface-area carbon supported Pt NPs below 5 nm in acidic electrolytes using rotating disk electrode method. The ORR activity was correlated to the estimated surface coverage by OH anion from cyclic voltammogram measurements and the surface composition and electronic structure of Pt NPs, which was studied using X-ray photoemission spectroscopy, and ultraviolet photoemission spectroscopy. The results revealed a size-independent ORR activity on Pt NPs below 5 nm, which was attributed to similar surface compositions and surface electronic structures of Pt NPs below 5 nm as well as comparable OH anion coverage at the potential where ORR was evaluated. In contrast, the instability of Pt NPs under accelerated potential cycling was found to be strongly dependent on the particle size.
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The ORR activity of Pt NPs below 5 nm is size-independent, attributed to similar surface compositions and surface electronic structures of Pt NPs below 5 nm as well as comparable OH anion coverage at the potential where ORR was evaluated.
“Another investigation 99 revealed a size-independent ORR activity of Pt NPs below 5 nm, which was attributed to the similar surface compositions and surface electronic structures of Pt NPs below 5 nm as well as comparable OH anion coverage at the potential where ORR was evaluated.”
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 [99]
The instability of Pt NPs under accelerated potential cycling is strongly dependent on the particle size.
“In contrast, the instability of Pt NPs under accelerated potential cycling was found to be strongly dependent on the particle size.”
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 [99]
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- Authors
- Sheng, W., Chen, S., Vescovo, E., & Shao-Horn, Y.
- Affiliations
- Massachusetts Institute of Technology (US)
- Brookhaven National Laboratory (US)
- Venue
- Journal of The Electrochemical Society
- Publisher
- The Electrochemical Society
- Published
- 2011
- Volume
- 159
- Issue
- 2
- Pages
- B96-B103
- ISSN
- 0013-4651 (ISSN-L)
- 1945-7111
- OpenAlex
- W2065222018
- Cited by
- 150
- References
- 3
- Citations by year
- 2026: 4 · 2025: 7 · 2024: 7 · 2023: 8 · 2022: 6 · 2021: 7 · 2020: 13 · 2019: 9 · 2018: 8 · 2017: 14 · 2016: 9 · 2015: 15 · 2014: 22 · 2013: 15 · 2012: 5
- FWCI
- 5.72
- Type
- journal article
- Language
- en
- Update notices
- correction (2012-01-01)
- Open access
- bronze
- doi.org
- Locations
- Journal of The Electrochemical Society (publishedVersion)
- DSpace@MIT (Massachusetts Institute of Technology) (submittedVersion)
- Funders
- National Science Foundation (DE-AC02-98CH10886, 0213282)
- U.S. Department of Energy (DE‐FG02‐, DEAC-02-98CH10886, No. DE-AC02-98CH10886, FG02-05ER15728, -AC02-98 CH 10886, DEFG0205ER15728, Contract No. DE-AC02-98CH10886, DE-AC02-)
- Office of Science (DE-AC-02-98CH10886, FG02-05ER15728, DE-AC02)
- Materials Research Science and Engineering Center, Harvard University
- Division of Materials Research
- Basic Energy Sciences (DE-AC02, DEAC0298CH10886, DE-FG02, AC02-98CH10886)
- Brookhaven National Laboratory (AC-02-98CH10886, DE-AC02- 98CH10886, Contract No. DE-AC02-98CH10886)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
- Physical Sciences › Materials Science › Materials Chemistry › Catalytic Processes in Materials Science
- Keywords
- oxygen reduction reaction, platinum nanoparticles, particle size effects, catalyst stability, proton exchange membrane fuel cells, surface electronic structure, surface composition, acidic electrolyte, carbon-supported catalysts
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