1. VO x Matrix Confinement Approach to Generate Sub-3 nm L1 0 -Pt-Based Intermetallic Catalysts for Fuel Cell Cathode.
- Author
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Deng Y, Zhang L, Zheng J, Dang D, Zhang J, Gu X, Yang X, Tan W, Wang L, Zeng L, Chen C, Wang T, and Cui Z
- Abstract
Pt-based intermetallic compounds (IMCs) are considered as a class of promising fuel cell electrocatalysts, owing to their outstanding intrinsic activity and durability. However, the synthesis of uniformly dispersed IMCs with small sizes presents a formidable challenge during the essential high-temperature annealing process. Herein, a facile and generally applicable VO
x matrix confinement strategy is demonstrated for the controllable synthesis of ordered L10 -PtM (M = Fe, Co, and Mn) nanoparticles, which not only enhances the dispersion of intermetallic nanocrystals, even at high loading (40 wt%), but also simplifies the oxide removal and acid-washing procedures. Taking intermetallic PtCo as an example, the as-prepared catalyst displays a high-performance oxygen reduction activity (mass activity of 1.52 A mgPt -1 ) and excellent stability in the membrane electrode assemblies (MEAs) (the ECSA has just 7% decay after durability test). This strategy provides an economical and scalable route for the controlled synthesis of Pt-based intermetallic catalysts, which can pave a way for the commercialization of fuel cell technologies., (© 2024 Wiley‐VCH GmbH.)- Published
- 2024
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