Multigrain Ruthenium Nanocrystals with Enriched (101¯1) Facets for Enhanced Hydrogen Oxidation in Anion Exchange Membrane Fuel Cells
(2025) In Advanced Materials 37(41).- Abstract
Ruthenium-based materials are promising alternatives to expensive platinum for the anodic hydrogen oxidation reaction (HOR) in anion exchange membrane fuel cells (AEMFCs), but face stability issues due to the strong oxophilicity. Here, an oxidation-resistant ruthenium multigrain catalyst is reported that exposes rich (10 (Formula presented.) 1) facets for high-performing HOR catalysis in alkaline electrolytes. The catalyst exhibits a high kinetic current density of 61 mA cm−2 at an overpotential of 50 mV, which is 25.6- and 7.8-times higher than that of commercial ruthenium-carbon and platinum-carbon catalysts, respectively. Moreover, it also demonstrates a wide stability window up to 0.3 V versus the reverse hydrogen... (More)
Ruthenium-based materials are promising alternatives to expensive platinum for the anodic hydrogen oxidation reaction (HOR) in anion exchange membrane fuel cells (AEMFCs), but face stability issues due to the strong oxophilicity. Here, an oxidation-resistant ruthenium multigrain catalyst is reported that exposes rich (10 (Formula presented.) 1) facets for high-performing HOR catalysis in alkaline electrolytes. The catalyst exhibits a high kinetic current density of 61 mA cm−2 at an overpotential of 50 mV, which is 25.6- and 7.8-times higher than that of commercial ruthenium-carbon and platinum-carbon catalysts, respectively. Moreover, it also demonstrates a wide stability window up to 0.3 V versus the reverse hydrogen electrode and enhanced tolerance to carbon monoxide. An AEMFC containing this catalyst at the anode achieves peak power densities of 1.31 and 1.06 W cm−2 under hydrogen-oxygen and hydrogen-air conditions at 90 °C, respectively, and operates steadily. Experimental and theoretical studies reveal that the (10 (Formula presented.) 1) facet possesses a higher oxidation barrier and lower hydrogen oxidation barrier than the common (0002) facets, enabling the exceptional HOR performances in alkali.
(Less)
- author
- organization
- publishing date
- 2025-10-16
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- anion exchange membrane fuel cell, hydrogen oxidation reaction, nanograins, ruthenium, stability window
- in
- Advanced Materials
- volume
- 37
- issue
- 41
- article number
- e05781
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- pmid:40708362
- scopus:105011876399
- ISSN
- 0935-9648
- DOI
- 10.1002/adma.202505781
- language
- English
- LU publication?
- yes
- id
- 47dff3b4-0e74-4312-85e9-04ccc95cc513
- date added to LUP
- 2026-01-20 16:16:59
- date last changed
- 2026-01-20 16:17:42
@article{47dff3b4-0e74-4312-85e9-04ccc95cc513,
abstract = {{<p>Ruthenium-based materials are promising alternatives to expensive platinum for the anodic hydrogen oxidation reaction (HOR) in anion exchange membrane fuel cells (AEMFCs), but face stability issues due to the strong oxophilicity. Here, an oxidation-resistant ruthenium multigrain catalyst is reported that exposes rich (10 (Formula presented.) 1) facets for high-performing HOR catalysis in alkaline electrolytes. The catalyst exhibits a high kinetic current density of 61 mA cm<sup>−2</sup> at an overpotential of 50 mV, which is 25.6- and 7.8-times higher than that of commercial ruthenium-carbon and platinum-carbon catalysts, respectively. Moreover, it also demonstrates a wide stability window up to 0.3 V versus the reverse hydrogen electrode and enhanced tolerance to carbon monoxide. An AEMFC containing this catalyst at the anode achieves peak power densities of 1.31 and 1.06 W cm<sup>−2</sup> under hydrogen-oxygen and hydrogen-air conditions at 90 °C, respectively, and operates steadily. Experimental and theoretical studies reveal that the (10 (Formula presented.) 1) facet possesses a higher oxidation barrier and lower hydrogen oxidation barrier than the common (0002) facets, enabling the exceptional HOR performances in alkali.</p>}},
author = {{Sun, Xiandi and Wu, Jiashun and Wang, Tao and Zhang, Xiao Long and Liu, Pei and Sun, Hongyu and Liu, Hang and Chen, Siyu and Ge, Jia and Liu, Tianrui and Wei, Haibing and Zhang, Chuan Ling and Cong, Huai Ping and Wang, Zhenbin and Zheng, Ya Rong and Gao, Min Rui}},
issn = {{0935-9648}},
keywords = {{anion exchange membrane fuel cell; hydrogen oxidation reaction; nanograins; ruthenium; stability window}},
language = {{eng}},
month = {{10}},
number = {{41}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Advanced Materials}},
title = {{Multigrain Ruthenium Nanocrystals with Enriched (101¯1) Facets for Enhanced Hydrogen Oxidation in Anion Exchange Membrane Fuel Cells}},
url = {{http://dx.doi.org/10.1002/adma.202505781}},
doi = {{10.1002/adma.202505781}},
volume = {{37}},
year = {{2025}},
}