Oxygen Transport at Three-Phase Interfaces of Pt Single-Atom Catalysts in Proton Exchange Membrane Fuel Cells

ACS Applied Materials & Interfaces 2026

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Authors: Jiabin You, Huiyuan Li, Xiaojing Cheng, Liuxuan Luo, Xiaohui Yan, Guoqiang Zhang, Shuiyun Shen, Junliang Zhang
DOI: 10.1021/acsami.5c21281
Cited by: 1
References: 49

Abstract

High Pt-loading catalysts constitute a critical bottleneck hindering the large-scale development of fuel cells. Pt single-atom catalysts (Pt SACs) demonstrate ultrahigh atomic utilization and catalytic activity, while their performance remains unsatisfactory under the harsh reaction conditions in catalyst layers (CLs), particularly due to mass transport constraints. Herein, molecular dynamics simulations are employed to thoroughly investigate the nanoscale oxygen transport mechanisms at Pt SACs-ionomer-gas three-phase interfaces in CLs. The results show the dense ionomer layer (

Fields of Study & Subjects

Electrocatalysts for Energy Conversion Fuel Cells and Related Materials Hybrid Renewable Energy Systems

Publication details

Journal / source
ACS Applied Materials & Interfaces
Publisher
American Chemical Society (ACS)
Volume
18
Issue
5
Pages
9125–9137
Publication date
2 February 2026
Language
EN