ORR durability study on Pt3.7Mn/KB, Pt3.9Co/KB and Pt3.7Ni/KB for heavy-duty vehicle operation

Galindev Oyunbileg; Garavdorj Batnyagt; Waka Nagano; Hidenobu Wakita; Koichi Ui; Tatsuya Takeguchi

doi:10.1039/D5YA00059A

ORR durability study on Pt_3.7Mn/KB, Pt_3.9Co/KB and Pt_3.7Ni/KB for heavy-duty vehicle operation†

Galindev Oyunbileg,

*^ab Garavdorj Batnyagt,^a Waka Nagano,^a Hidenobu Wakita,

^a Koichi Ui

^a and Tatsuya Takeguchi*^a

Author affiliations

* Corresponding authors

^a Faculty of Science and Engineering, Iwate University, Morioka, Iwate 020-8551, Japan
E-mail: takeguch@iwate-u.ac.jp

^b Department of Chemistry, School of Arts and Science, National University of Mongolia, Ulaanbaatar 14201, Mongolia
E-mail: oyunbileg19@num.edu.mn

Abstract

Since durability is one of the key issues for using robust catalysts in fuel cell systems of heavy-duty vehicles (HDV, a durability target of 50 000 h) applications, the durability of various core–shell Pt-based alloy catalysts is evaluated. Herein, we present the durability behaviors of Pt_3.7Mn/KB (KB: EC600JD), Pt_3.9Co/KB and Pt_3.7Ni/KB catalysts with similar initial activities for the oxygen reduction reaction (ORR) of fuel cell systems. The durability of the catalysts was evaluated by a square-wave accelerated durability test (ADT) under the HDV operation. Notably, Pt_3.9Co/KB largely retained its mass activity (MA) even after 70 000 ADT cycles, while Pt_3.7Mn/KB and Pt_3.7Ni/KB significantly degraded during the tests. Less alteration in MA of Pt_3.9Co/KB was consistent with the slight change in the Tafel slope.

This article is part of the themed collection: Research advancing UN SDG 7: Affordable and clean energy

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Article information

DOI: https://doi.org/10.1039/D5YA00059A
Article type: Paper
Submitted: 04 Mar 2025
Accepted: 12 Jun 2025
First published: 20 Jun 2025
This article is Open Access

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Energy Adv., 2025, Advance Article

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ORR durability study on Pt_3.7Mn/KB, Pt_3.9Co/KB and Pt_3.7Ni/KB for heavy-duty vehicle operation

G. Oyunbileg, G. Batnyagt, W. Nagano, H. Wakita, K. Ui and T. Takeguchi, Energy Adv., 2025, Advance Article , DOI: 10.1039/D5YA00059A

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