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Bifunctional PdMoPt trimetallene boosts alcohol-water electrolysis
Junfeng Liu1, Tong Li1, Qiuxia Wang1
1Institute for Energy Research, School of Chemistry and Chemical Engineering, Jiangsu University Zhenjiang 212013 China jliu@ujs.edu.cn wangyong@ujs.edu.cn.
Chemical Science
|September 26, 2024
Summary
Developing a novel PdMoPt trimetallene catalyst enhances alcohol oxidation for efficient hydrogen production. This bifunctional catalyst significantly lowers voltage requirements in alcohol-water electrolysis, advancing energy-efficient hydrogen generation.
Area of Science:
- Electrochemistry
- Materials Science
- Catalysis
Background:
- Efficient hydrogen production is vital for renewable energy.
- Replacing oxygen evolution with alcohol oxidation can lower energy demands for hydrogen evolution.
- Developing high-performance bifunctional catalysts is essential but challenging.
Purpose of the Study:
- To develop a novel ultrathin and porous PdMoPt trimetallene catalyst.
- To investigate its performance in alcohol electrooxidation and hydrogen evolution reaction (HER).
- To establish an energy-efficient alcohol-water hybrid electrolysis system.
Main Methods:
- A wet-chemical strategy was employed to synthesize the PdMoPt trimetallene.
- The catalyst's activity was tested for electrooxidation of methanol, ethylene glycol, and glycerol.
- Its performance in the hydrogen evolution reaction (HER) was evaluated.
- An alcohol-water hybrid electrolysis system was constructed using the catalyst.
Main Results:
- The PdMoPt trimetallene exhibited high mass activity for methanol (6.13 A mgPd+Pt-1), ethylene glycol (5.5 A mgPd+Pt-1), and glycerol (4.37 A mgPd+Pt-1) electrooxidation.
- The catalyst demonstrated excellent HER activity with a low overpotential of 39 mV at 10 mA cm-2.
- The alcohol-water hybrid electrolysis system significantly reduced voltage requirements for hydrogen production.
Conclusions:
- The synergetic effect in PdMoPt trimetallene optimizes adsorption energies for enhanced catalytic activity.
- This bifunctional catalyst offers exceptional performance for both alcohol electrooxidation and HER.
- The developed catalyst and electrolysis system present a promising pathway for energy-efficient hydrogen production.
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