Modulating Built‐In Electric Field via Variable Oxygen Affinity for Robust Hydrogen Evolution Reaction in Neutral Media
Hong Kong Polytechnic University · University of Electronic Science and Technology of China · +3 more institutions
Abstract
Abstract Work function strongly impacts the surficial charge distribution, especially for metal‐support electrocatalysts when a built‐in electric field (BEF) is constructed. Therefore, studying the correlation between work function and BEF is crucial for understanding the intrinsic reaction mechanism. Herein, we present a Pt@CoO x electrocatalyst with a large work function difference (ΔΦ) and strong BEF, which shows outstanding hydrogen evolution activity in a neutral medium with a 4.5‐fold mass activity higher than 20 % Pt/C. Both experimental and theoretical results confirm the interfacial charge redistribution induced by the strong BEF, thus subtly optimizing hydrogen and hydroxide adsorption energy. This…
Citation impact
- FWCI
- 14.70
- Percentile
- 100%
- References
- 59
Authors
11Topics & keywords
- Work function
- Electric field
- Hydrogen production
- Hydrogen
- Redistribution (election)
- Oxygen evolution
- Electrocatalyst
- Chemical physics