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Updated: Jan 6, 2026
Hydrogen Production and Utilization in a Membrane Reactor
Published on: March 10, 2023
Unlocking Hydrogen-Bond Network-Mediated Directional Spillover Mechanism in Electrocatalytic Hydrogen Evolution
Linsen Li1, Yuefei Li2, Hong-Ying Zang3
1Key Laboratory of Fluorine & Nitrogen Chemicals, School of Chemical Engineering, Xi'an Jiaotong University, Xi'an, 710048, China.
We developed a novel hydrogen spillover mechanism using a hydrogen-bond network to enhance the electrocatalytic hydrogen evolution reaction (HER). This approach significantly boosts catalytic activity by facilitating efficient hydrogen transport across catalyst components.
Area of Science:
- Electrochemistry
- Materials Science
- Catalysis
Background:
- Hydrogen spillover is key to overcoming scaling relations in electrocatalytic hydrogen evolution reaction (HER).
- Sluggish spillover kinetics at heterogeneous interfaces limit practical HER applications.
- Conventional interfacial mediation hinders efficient hydrogen transport.
Purpose of the Study:
- To propose and demonstrate a hydrogen-bond (H-bond) network-mediated spillover mechanism for enhanced HER.
- To bypass conventional interfacial mediation for improved spillover kinetics.
- To design a novel catalyst facilitating this H-bond mediated spillover.
Main Methods:
- Designed a Pt/g-C3N4/CoP catalyst with a specific architecture.
- Investigated hydrogen-bond network-mediated spillover via Grotthuss-type H* hopping.
- Evaluated the electrocatalytic HER activity in acidic medium.
Main Results:
- Achieved an ultrahigh Pt-mass-normalized HER activity of 175.0 A mgPt−1 at -0.1 V vs. RHE.
- Demonstrated efficient H-bond network-mediated spillover along the Pt→g-C3N4→CoP pathway.
- Established a coverage gradient of active hydrogen species (H*) from Pt to CoP.
Conclusions:
- The H-bond network-mediated spillover mechanism offers a new strategy for HER catalyst design.
- This approach overcomes limitations of sluggish spillover kinetics.
- Opens new avenues for multi-step hydrogen-involving electrocatalytic processes.
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