Inducing Covalent Atomic Interaction in Intermetallic Pt Alloy Nanocatalysts for High-Performance Fuel Cells
发布时间：2024-06-05
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- 论文类型：
- Research Article
- 第一作者：
- Liu,Xuan
- 通讯作者：
- Li,Qing
- 合写作者：
- Huang,Yunhui,Xiaoming,Wu,Han,Jiantao,Wang,Tanyuan,Priest,Cameron,Lu,Gang,Li,Shenzhou,Liang,Jiashun,Zhao,Zhonglong
- 发表刊物：
- Angewandte Chemie International Edition
- 所属单位：
- 华中科技大学
- 刊物所在地：
- 德国
- 文献类型：
- Article
- 卷号：
- 62
- 期号：
- 23
- 页面范围：
- e202302134
- ISSN号：
- 1521-3773
- 关键字：
- Covalent Interaction; Electrocatalysis; Fuel Cells; Intermetallics; Oxygen Reduction Reaction
- DOI码：
- 10.1002/anie.202302134
- 发表时间：
- 2023-04-04
- 影响因子：
- 16.1
- 摘要：
- The harsh working environments of proton exchange membrane fuel cells (PEMFCs) pose huge challenges to the stability of Pt-based alloy catalysts. The widespread presence of metallic bonds with significantly delocalized electron distribution often lead to component segregation and rapid performance decay. Here we report L10−Pt2CuGa intermetallic nanoparticles with a unique covalent atomic interaction between Pt−Ga as high-performance PEMFC cathode catalysts. The L10−Pt2CuGa/C catalyst shows superb oxygen reduction reaction (ORR) activity and stability in fuel cell cathode (mass activity=0.57 A mgPt−1 at 0.9 V, peak power density=2.60/1.24 W cm−2 in H2-O2/air, 28 mV voltage loss at 0.8 A cm−2 after 30 000 cycles). Theoretical calculations reveal the optimized adsorption of oxygen intermediates via the formed biaxial strain on L10−Pt2CuGa surface, and the durability enhancement stems from the stronger Pt−M bonds than those in L11−PtCu resulted from Pt−Ga covalent interactions.