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Highly Efficient and Stable Mo-CoP3@FeOOH Electrocatalysts for Alkaline Seawater Splitting
Depeng Zhao1, Xingyu Liu1, Wei-Chao Zhang2
1School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, P. R. China.
Small Methods
|December 27, 2023
Summary
New electrocatalysts using molybdenum-doped cobalt phosphide coated with iron oxyhydroxide achieve efficient water and seawater electrolysis. This breakthrough offers a scalable method for high-performance, durable catalysts, advancing clean energy technologies.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Designing efficient electrocatalysts for water electrolysis is crucial for clean energy.
- Scalable synthesis methods are needed to understand performance enhancement mechanisms.
Purpose of the Study:
- To develop high-performance electrocatalysts for water and alkaline seawater electrolysis.
- To investigate the role of element doping and surface modification in electrocatalytic activity.
Main Methods:
- Synthesis of Mo-doped CoP nanostructures coated with FeOOH.
- Electrochemical testing for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER).
- Assembly of electrolyzer devices for seawater/water splitting.
- Density functional theory (DFT) calculations.
Main Results:
- Mo-CoP3-2@FeOOH exhibited low overpotentials for OER (232 mV in alkaline seawater).
- The catalyst demonstrated excellent HER performance and stability (350 h).
- Electrolyzer devices achieved a cell voltage of 1.58 V for alkaline seawater electrolysis.
Conclusions:
- Transition-metal phosphides coated with FeOOH provide an effective strategy for high-performance electrocatalysts.
- Mo doping and FeOOH coating enhance charge transfer and optimize intermediate adsorption.
- The developed catalysts are promising for efficient and durable seawater/water electrolysis.
Keywords:
CoP3d band centerdensity functional theoryelement dopingfenton reactionseawater electrolysisMore Related Videos
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