Anti-Corrosive SnS2/SnO2 Heterostructured Support for Pt Nanoparticles Enables Remarkable Oxygen Reduction Catalysis via Interfacial Enhancement
发布时间：2024-12-29
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- 论文类型：
- Research Article
- 第一作者：
- Lin,Zijie
- 通讯作者：
- Li,Qing
- 合写作者：
- Huang, Yunhui,Han, Jiantao,Lu, Gang,Xie, Linfeng, Xuan,Liang, Jiashun,Li, Shenzhou,Liu, Junyi
- 发表刊物：
- Advanced Functional Materials
- 所属单位：
- 华中科技大学
- 刊物所在地：
- 德国
- 文献类型：
- Article
- 卷号：
- 33
- 期号：
- 11
- 页面范围：
- 2211638
- ISSN号：
- 1616-3028
- 关键字：
- Catalyst Supports; Fuel Cells; Heterostructures; Oxygen Reduction Reactions; Tin Oxides
- DOI码：
- 10.1002/adfm.202211638
- 发表时间：
- 2023-01-01
- 影响因子：
- 18.5
- 摘要：
- The stability of Pt-based catalysts for oxygen reduction reaction (ORR) in hydrogen fuel cells is seriously handicapped by the corrosion of their carbon supports at high potentials and acidic environments. Herein, a novel SnS2/SnO2 hetero-structured support is reported for Pt nanoparticles (NPs) as the ORR catalyst, where Pt NPs are mainly deposited at the interfaces of SnS2 and SnO2 moieties. The Pt-support interactions, which can be tuned by the concentration of the heterointerfaces, can accelerate the electronic transfer and enrich the electron density of Pt with a favorable shift of the d-band center. In electrochemical measurements, the ORR mass activity (MA) of the optimal Pt-SnS2/SnO2 catalyst at 0.9 V versus RHE (0.40 A mgPt−1) is four times higher than that of Pt/C. As for the stability, the electrochemical active surface area and MA of Pt-SnS2/SnO2 are only decreased by 18.2% and 23.7% after 50 000 potential cycles at a high potential region (1.0–1.6 V), representing the best ORR stability among the reported Pt-based catalysts. Density functional theory calculations indicate that the binding energy and migration barrier of Pt atom/cluster on the SnS2/SnO2 heterojunction are much higher relative to other supports, accounting for the outstanding stability of the catalyst.