Identifying the Distinct Roles of Dual Dopants in Stabilizing the Platinum-nickel Nanowire Catalyst for Durable Fuel Cell

Overview

Journal Nat Commun

Specialty Biology

Date 2024 Jan 13

PMID 38218946

Authors

Lei Gao

Tulai Sun

Xuli Chen

Zhilong Yang

Mengfan Li

Wenchuan Lai

Wenhua Zhang

Quan Yuan

Hongwen Huang

Affiliations

Soon will be listed here.

Abstract

Stabilizing active PtNi alloy catalyst toward oxygen reduction reaction is essential for fuel cell. Doping of specific metals is an empirical strategy, however, the atomistic insight into how dopant boosts the stability of PtNi catalyst still remains elusive. Here, with typical examples of Mo and Au dopants, we identify the distinct roles of Mo and Au in stabilizing PtNi nanowires catalysts. Specifically, due to the stronger interaction between atomic orbital for Ni-Mo and Pt-Au, the Mo dopant mainly suppresses the outward diffusion of Ni atoms while the Au dopant contributes to the stabilization of surface Pt overlayer. Inspired by this atomistic understanding, we rationally construct the PtNiMoAu nanowires by integrating the different functions of Mo and Au into one entity. Such catalyst assembled in fuel cell cathode thus presents both remarkable activity and durability, even surpassing the United States Department of Energy technical targets for 2025.

Citing Articles

Balancing Activity and Stability through Compositional Engineering of Ternary PtNi-Au Alloy ORR Catalysts.

Xie X, Briega-Martos V, Alemany P, Mohandas Sandhya A, Skala T, Rodriguez M ACS Catal. 2025; 15(1):234-245.

PMID: 39781331 PMC: 11705540. DOI: 10.1021/acscatal.4c05269.

Stability of Graphene/Nafion Composite in PEM FC Electrodes.

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