Phase Segregated Pt–SnO2/C Nanohybrids for Highly Efficient Oxygen Reduction Electrocatalysis
Abstract
Strengthening the interfacial interaction in heterogeneous catalysts can lead to a dramatic improvement in their performance and allow the use of smaller amounts of active noble metal, thus decreasing the cost without compromising their activity. In this work, a facile phase-segregation method is demonstrated for synthesizing platinum-tin oxide hybrids supported on carbon black (PtSnO 2 /C) in situ by air annealing PtSn alloy nanoparticles on carbon black. Compared with a control sample formed by preloading SnO 2 on carbon support followed by deposition of Pt nanoparticles, the phase-segregation-derived PtSnO 2 /C exhibits a more strongly coupled PtSnO 2 interface with lattice overlap of Pt (111) and SnO 2 (200), along with enhanced electron transfer from SnO 2 to Pt. Furthermore, the PtSnO 2 active sites show a strong ability to degrade reactive oxygen species. As a result, the PtSnO 2 /C nanohybrids exhibit both excellent activity and stability as a catalyst for the oxygen reduction reaction, with an overall performance which is superior to both the control sample and commercial Pt/C catalyst. This phase-segregation method can be expected to be applicable in the preparation of other strongly coupled nanohybrids and offers a new route to high-performance heterogeneous catalysts for low-cost energy conversion devices.
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A tiny peak shift in the Pt 4f core-level XPS spectrum is evidence of the electronic modification of the Pt 5d band by either charge transfer or alloy formation with the support.
“A tiny peak shift in the Pt 4f core-level XPS spectrum is evidence of the electronic modification of the Pt 5d band by either charge transfer or alloy formation with the support.72,76,77”
From Highly Dispersed Pt Clusters on F-Doped Tin(IV) Oxide Aerogel Matrix: An Ultra-Robust Hybrid Catalyst for Enhanced Hydrogen Evolution (2022) · cites this paper as [76]
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- Authors
- Guan, J., Zan, Y., Shao, R., Niu, J., Dou, M., Zhu, B., Zhang, Z., & Wang, F.
- Affiliations
- State Key Laboratory of Chemical Resource Engineering (CN)
- Beijing University of Chemical Technology (CN)
- Corresponding author
- Zhu, Baoning
- Zhang, Zhengping
- Wang, Feng
- Venue
- Small
- Publisher
- Wiley
- Published
- 2020-12
- Volume
- 16
- Issue
- 51
- Pages
- e2005048-e2005048
- ISSN
- 1613-6810 (ISSN-L)
- 1613-6829
- OpenAlex
- W3110717075
- Cited by
- 54
- References
- 36
- Citations by year
- 2026: 2 · 2025: 12 · 2024: 10 · 2023: 10 · 2022: 9 · 2021: 11
- FWCI
- 1.48
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Small (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China (51432003, 51802011, 51125007)
- National Basic Research Program of China (2018YFB0105500)
- Beijing University of Chemical Technology (buctrc201806)
- Fundamental Research Funds for the Central Universities (JD2010)
- 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, phase segregation, carbon black support, air annealing, interfacial interactions, lattice matching, electron transfer, heterogeneous electrocatalysts, noble metal reduction, fuel cells
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