Ternary PtCoSn Catalyst with Regulated Intermediates Adsorption for Efficient Ammonia Electrolysis
Congfu Dai1, Xiaofen Yuan1, Yuxing Wang1
1College of Materials Science and Engineering, Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|May 3, 2025
Summary
A novel ternary platinum-cobalt-tin (PtCoSn/C) catalyst significantly boosts ammonia oxidation reaction (AOR) for green hydrogen production. This efficient catalyst enhances ammonia electrolysis, offering a promising pathway for sustainable energy solutions.
Area of Science:
- Electrochemistry
- Materials Science
- Catalysis
Background:
- Ammonia electrolysis offers a sustainable and cost-effective route for hydrogen production.
- The ammonia oxidation reaction (AOR) is kinetically challenging, requiring efficient catalysts.
- Developing advanced catalysts is crucial for advancing ammonia electrolysis technology.
Purpose of the Study:
- To develop and evaluate a novel ternary catalyst for the ammonia oxidation reaction (AOR).
- To investigate the catalytic performance of PtCoSn/C for enhanced hydrogen production via ammonia electrolysis.
- To elucidate the mechanism behind the improved catalytic activity.
Main Methods:
- Synthesis of ternary PtCoSn/C catalyst using a wet-chemical reduction method.
- Electrochemical characterization, including specific activity measurements (0.87 mA cmECSA-2).
- In situ attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy to study reaction intermediates.
Main Results:
- The PtCoSn/C catalyst demonstrated a specific activity three times higher than Pt/C.
- Co-alloying with Sn regulated intermediate adsorption and facilitated OH- supply.
- The catalyst exhibited bifunctional activity, requiring only 0.78 V for 10 mA cm-2 in a two-electrode system.
Conclusions:
- Ternary PtCoSn/C is a highly efficient catalyst for ammonia oxidation reaction (AOR).
- The catalyst design optimizes intermediate adsorption and reactant supply for enhanced ammonia electrolysis.
- This work advances catalyst development for efficient and sustainable hydrogen production from ammonia.
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