Co-sputtered NiMnCo as bifunctional electrocatalysts for anion exchange membrane water electrolysis
Journal
Inorganic Chemistry Communications
Journal Volume
192
Journal Issue
P1
Start Page
117278
ISSN
1387-7003
Date Issued
2026-10
Author(s)
Hsiao, Kai-Wen
Yeh, Li-Yun
Hsu, Ruei-Yu
Chiu, Li-Da
Chen, I-Tong
Chen, Chih-Hung
Tung, Yung-Liang
Cheng, I-Chun
Abstract
Developing efficient and scalable non-precious metal electrocatalysts is critical for advancing anion exchange membrane water electrolysis (AEMWE) toward practical hydrogen production. Herein, a bifunctional NiMnCo catalyst system is fabricated via a single-step co-sputtering method, enabling the simultaneous preparation of both anode and cathode electrodes using non-precious metals. The optimized N93 (Ni:MnCo power ratio = 90 W: 30 W, deposited on Ni fiber paper) and S93 (Ni:MnCo power ratio = 90 W: 30 W, deposited on stainless steel fiber paper) samples exhibit competitive HER and OER performance with low charge transfer resistance and favorable reaction kinetics. When integrated into an AEMWE system, the cathode-wet configuration delivers better performance, achieving current densities of 366.9, 537.2, and 871.8 mA cm−2 at 2 V at temperatures of 25, 50, and 70 °C, respectively. Moreover, the system demonstrates stable operation over 60 h at 100 mA·cm−2. This work presents a simple, scalable, and cost-effective approach for constructing bifunctional non-precious metal electrodes, offering a promising scalable pathway toward replacing noble-metal-based systems in promising AEMWE applications.
Subjects
Anion exchange membrane water electrolysis
Co-sputtering
Non-precious metal
Publisher
Elsevier BV
Type
journal article