Related Experiment Video
Updated: Jul 8, 2025
Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells
Published on: October 20, 2023
Improving Alkaline Hydrogen Oxidation through Dynamic Lattice Hydrogen Migration in Pd@Pt Core-Shell Electrocatalysts
Tonghui Zhao1, Mengting Li2, Dongdong Xiao3
1Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China.
A new dynamic lattice hydrogen migration mechanism significantly boosts alkaline hydrogen oxidation reaction (HOR) activity on Pd@Pt catalysts. This advance enhances catalyst design for efficient hydrogen electro-catalysis.
Area of Science:
- Electrochemistry
- Materials Science
- Catalysis
Background:
- Designing efficient catalysts for hydrogen electro-catalysis requires understanding hydrogen intermediate behavior.
- Synergetic multi-component catalysts offer improved performance through a division of chemical labor.
Purpose of the Study:
- To demonstrate a novel dynamic lattice hydrogen migration mechanism.
- To investigate its impact on alkaline hydrogen oxidation reaction (HOR) activity.
Main Methods:
- Utilizing Palladium-Platinum core-shell (Pd@Pt) nanoparticles.
- Employing electrochemical hydrogenation and dehydrogenation processes.
- In situ analysis to track lattice hydrogen (LH) dynamics.
Main Results:
- Pd@Pt catalysts exhibited a two orders of magnitude increase in alkaline HOR activity compared to pure Pd.
- Mass activity enhancement reached approximately 31.8 times that of commercial Pt.
- Demonstrated a dynamic LH migration mechanism involving PdHₓ formation and dehydrogenation, enhancing surface Pt sites and lowering the Volmer step energy barrier.
Conclusions:
- The dynamic lattice hydrogen migration mechanism significantly enhances HOR activity.
- PdHₓ acts as a hydrogen reservoir, facilitating continuous hydrogen supply to Pt surface sites.
- This mechanism offers a new avenue for designing advanced electro-catalysts for hydrogen-related energy applications.
More Related Videos
09:02Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
Published on: April 27, 2018
08:40Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
Related Concept Videos
02:13Reduction of Alkenes: Catalytic Hydrogenation
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.