在Ag2Pt3TiS6上的合作活动站点用于增强的低温氨燃料电池电催化
Tong Wu1,2, Kapil Dhaka3, Mengjia Luo4
1Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585, Republic of Singapore.
Angewandte Chemie (International ed. in English)
|November 26, 2024
概括
一种新的Ag2Pt3TiS6电催化剂提高了低温氨燃料电池的性能. 这种双功能催化剂增强了氨氧化和氧降解反应,为高效的能能源铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 氨是减碳能源系统的有希望的载体.
- 低温氨燃料电池对于按需发电至关重要.
- 缓慢的氨氧化 (AOR) 和氧减少 (ORR) 反应限制了燃料电池的效率.
研究的目的:
- 设计一种双功能电催化剂,用于低温氨燃料电池中高效的AOR和ORR.
- 研究新型电催化剂的催化机制和性能.
- 使用开发的催化剂构建和评估低温氨燃料电池.
主要方法:
- Ag2Pt3TiS6电催化剂的合成和表征.
- 密度函数理论 (DFT) 计算以了解催化机制.
- 在现场外隔离的纳米粒子增强拉曼光谱 (SHINERS) 用于反应分析.
- 制造和测试低温氨燃料电池.
主要成果:
- 电催化剂Ag2Pt3TiS6的质量活动超过商业Pt/C的AOR和ORR.
- DFT的计算显示了合作性Pt-Ti活性位点,催化了这两种反应.
- SHINERS的实验显示,氧化物形成减少,催化剂中毒耐受性提高.
- 氨燃料电池实现了8.71mW/cm2的峰值功率密度,同时具有较低的Pt负载 (0.45 mg/cm2).
结论:
- Ag2Pt3TiS6是一种有效的双功能电催化剂,用于低温氨燃料电池.
- 合作的多元素活性站点是提高催化性能的关键.
- 这项工作为设计用于能应用的先进电催化剂提供了策略.
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