We are proud to spotlight cutting-edge research published by Huiqi Li, Rui Zeng, David Muller, Hector Abruna, and their team at Cornell University. Their work advances the rational design of high-performance, low-loading oxygen reduction reaction (ORR) catalysts for alkaline fuel cells using Scribner’s 850 Fuel Cell Test System. This work establishes clear design principles for overcoming sluggish ORR kinetics in alkaline environments—one of the key bottlenecks limiting alkaline fuel cell performance.
Key Insights:
- A modified volcano plot tailored for alkaline ORR provides a new theoretical framework linking adsorption energetics with catalytic activity.
- Guided by this framework, the authors designed Pt nanosheets supported on PdHₓ nanosheets, achieving exceptional ORR activity at ultra-low precious metal loadings.
- The catalyst exhibits a specific activity of 1.71 mA cm⁻² at 0.95 V vs RHE, outperforming conventional Pt/C catalysts by nearly 50×, while also delivering outstanding durability.
- Enhanced performance is attributed to tensile strain on Pt{111} facets, which improves oxidative stability and mitigates degradation pathways.
Why It Matters:
This study provides both mechanistic insight and practical design rules for next-generation ORR catalysts in alkaline fuel cells. By enabling high activity at low platinum loadings, the work directly supports the development of more efficient, durable, and cost-effective alkaline fuel cell technologies.
Congratulations to the research team for this impactful contribution to electrochemical energy conversion.
