DataVXACS Applied Energy MaterialsPaper
journal article·2025-12-08

Understanding Catalyst Design of High-Entropic Non-Noble Metal Alloys for the Oxygen Evolution Reaction in Acidic Media

Fumiya Shiokawa, Shunnosuke Sato, Zeyu Xi, Samuel Jeong, Hisanori Tanimoto, Rafat Tahawy, Mahmoud Abdelnabi, Yusuke Hasegawa, Yoshitatsu Misu, Kaori Takano, Yoshikazu Ito

ACS Applied Energy Materials· Volume 8· Issue 23
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Source abstract

Abstract

Non-noble metal-based anodes are crucial for the replacement of noble metal-based anodes in proton-exchange membrane electrolyzers. However, the catalyst design is challenging for use in acidic electrolytes since the catalytically active elements accelerate anode degradation, while the corrosion-resistant elements reduce the catalytic activity. To solve this trade-off, this study systematically investigates the composition ratios of catalytically active elements (Cr, Mn, Fe, Co, and Ni) and passivation elements (Ti, Zr, Nb, and Mo) and defines the optimal elemental composition to mimic the acid stability exhibited by nonary alloys. The results indicate that the compositional ratio affects the corrosion mechanism. Although a stable system can be achieved using fewer elements (Ti, Co, Ni, Zr, and Nb), the anode performance is reduced compared to that of the nonary alloy. This study provides useful insights into the design of acid-stable non-noble metal-based anodes to replace noble metal-based anodes.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storageMetals & alloysCatalysis & surfaces

OpenAlex topics: Hybrid Renewable Energy Systems · Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Applied Physics, Institute of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan

Central Metallurgical Research and Development Institute (CMRDI), P.O. Box 87 Helwan, Cairo 11421, Egypt

Physics Department, Faculty of Science

Ain Shams University

Central Technical Research Laboratory, ENEOS Corporation, 8 Chidori-cho, Naka-Ku, Yokohama 231-0815, Japan

Tsukuba Institute for Advanced Research (TIAR), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan

Funding

Matsumae International Foundation · University of Tsukuba · ENEOS Hydrogen Trust Fund · Tohoku University · Japan Society for the Promotion of Science · Iwatani Naoji Foundation · Paloma Environmental Technology Development Foundation · Egyptian Cultural Affairs and Missions Sector · KRI Exploratory Research Fund · JACI Prize for Outstanding Achievements

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