.png){kind=icon}
.png){kind=icon}
Return
Ultra-Low-Loading RuW Nanoclusters Coupled with W Single Atoms for Efficient Anion Exchange Membrane Fuel Cells
.png){kind=icon}
PRE
AI
Q
R
L
Z
L
Y
Q
J
Z
Q
X
N
X
DOI：10.1039/D5EE04114G.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Cost-effective Ru holds promise to tackle the sluggish hydrogen oxidation reaction (HOR) kinetic under alkaline conditions; which has emerged as an appealing alternative to Pt and Pt-Ru. However; developing Ru-type catalysts that can simultaneously possess high activity and stability for practical anion exchange membrane fuel cell (AEMFC) applications remains a significant challenge; particularly when using low platinum-group-metal (PGM) loadings. Here; we present a versatile dual tungsten (W)-embedding nanocatalyst that integrates dispersive Ru−W nanoclusters with W single atoms on a N-doped carbon (NC) substrate (RuW/W−NC). Specifically; W acts as both an activator for Ru nanoclusters as well as a stabilizer between Ru nanoclusters and NC support to enhance the activity and durability. Importantly; the RuW/W−NC-based fuel cell with an ultralow Ru loading of 0.1 mg cm−2 achieves an excellent peak power density of 2.03 W cm−2 in H2-O2; surpassing state-of-the-art Ru-based HOR catalysts and commercial Pt-Ru/C. Notably; the AEMFC delivers a rated power density of 0.91 W cm−2 at 0.65 V under H2-air conditions; approaching the U.S. Department of Energy (DOE) 2025 target (1 W cm−2) with a total PGM loading of 0.125 mg cm−2. Additionally; the RuW/W−NC-based fuel cell can be run stably at an industrial current density of 1 A cm-2 beyond 100 h. Detailed mechanistic and theoretical investigations reveal that the exceptional performance of RuW/W−NC originates from the embedment of W in Ru nanoclusters and the formation of interfacial Ru−W coordination; which effectively balances *OH and *H adsorption/desorption and inhibits nanoclusters agglomeration; respectively. These ground-breaking milestones shed light on Ru-type catalysts; positioning RuW/W−NC as the most efficient HOR catalysts for practical cost-effective AEMFC applications.
Journal
IF:
30.8
Papers:
6.9K
Citations:
12.4W
Organization
No organization information available
Cited Papers