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Short-Path Hydrogen Spillover on CeO2-Supported PtPd Nanoclusters for Efficient Hydrogen Evolution in Acidic Media
Zixin Yan1, Zirui Liu2, Guosheng Zhou1
1Zhejiang Key Laboratory for Island Green Energy and New Materials, Taizhou University, Jiaojiang, Zhejiang, 318000, China.
This study enhances hydrogen evolution reaction (HER) efficiency using PtPd alloy clusters on CeO2. The novel approach facilitates hydrogen spillover, significantly lowering energy barriers and overpotential in acidic conditions.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Hydrogen spillover in supported metal electrocatalysts is key for improving hydrogen evolution reaction (HER) efficiency.
- Current challenges include facilitating hydrogen spillover and reducing reaction energy barriers.
Purpose of the Study:
- To design highly efficient HER electrocatalysts for acidic environments.
- To investigate the mechanism of hydrogen spillover on PtPd alloy clusters anchored to CeO2.
Main Methods:
- Anchoring Platinum-Palladium (PtPd) alloy clusters onto a Cerium dioxide (CeO2) surface.
- Investigating hydrogen adsorption and migration pathways during HER.
- Measuring electrocatalytic performance, including overpotential and stability.
Main Results:
- Achieved short-path hydrogen spillover from PtPd to CeO2 interface.
- Observed a near-zero Gibbs free energy of hydrogen adsorption (0.023 eV) at the interface.
- Demonstrated exceptionally low overpotential (5.7 mV at 10 mA cm-2) in acidic media.
- Exhibited remarkable long-term stability.
Conclusions:
- PtPd/CeO2 catalyst design effectively lowers HER energy barriers via optimized hydrogen spillover.
- The findings offer valuable insights for developing advanced HER electrocatalysts for acidic applications.
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