Metal-support interaction boosts the stability of Ni-based electrocatalysts for alkaline hydrogen oxidation

Ni-based hydrogen oxidation reaction (HOR) electrocatalysts are promising anode materials for the anion exchange membrane fuel cells (AEMFCs), but their application is hindered by their inherent instability for practical operations. Here, we report a TiO 2 supported Ni 4 Mo (Ni 4 Mo/TiO 2 ) catalyst...

Full description

Saved in:
Bibliographic Details
Published in:Nature communications 2024-01, Vol.15 (1), p.76-76, Article 76
Main Authors: Tian, Xiaoyu, Ren, Renjie, Wei, Fengyuan, Pei, Jiajing, Zhuang, Zhongbin, Zhuang, Lin, Sheng, Wenchao
Format: Article
Language:English
Subjects:
639/4077/893
639/638/161/886
Anion exchange
Anion exchanging
Anodes
Catalysts
Charge transfer
Durability
Electrocatalysts
Electrode materials
Electrolytic cells
Electronic structure
Fuel cells
Fuel technology
Humanities and Social Sciences
Hydrogen
Membranes
multidisciplinary
Nickel
Oxidation
Science
Science (multidisciplinary)
Stability
Titanium dioxide
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Ni-based hydrogen oxidation reaction (HOR) electrocatalysts are promising anode materials for the anion exchange membrane fuel cells (AEMFCs), but their application is hindered by their inherent instability for practical operations. Here, we report a TiO 2 supported Ni 4 Mo (Ni 4 Mo/TiO 2 ) catalyst that can effectively catalyze HOR in alkaline electrolyte with a mass activity of 10.1 ± 0.9 A g −1 Ni and remain active even up to 1.2 V. The Ni 4 Mo/TiO 2 anode AEMFC delivers a peak power density of 520 mW cm −2 and durability at 400 mA cm −2 for nearly 100 h. The origin for the enhanced activity and stability is attributed to the down-shifted d band center, caused by the efficient charge transfer from TiO 2 to Ni. The modulated electronic structure weakens the binding strength of oxygen species, rendering a high stability. The Ni 4 Mo/TiO 2 has achieved greatly improved stability both in half cell and single AEMFC tests, and made a step forward for feasibility of efficient and durable AEMFCs. Nickel-based electrocatalysts for hydrogen oxidation in anion exchange membrane fuel cells face stability issues. Here the authors report Ni 4 Mo/TiO 2 catalyst with significantly improved stability, owing to the efficient charge transfer from TiO 2 to Ni.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-023-44320-w