来自Zr-修饰的NiTi-LDH的RuNi/TiZr-MMO催化剂用于CO选择性甲化
Zhihui Li1, Jiteng Ma1, Xinfa Dong1
1Guangdong Provincial Key Laboratory of Green Chemical Product Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
Molecules (Basel, Switzerland)
|July 27, 2024
概括
开发用于CO选择性甲化 (CO-SMET) 的先进催化剂对于燃料电池至关重要. RuNi/TiZr0.2-MMO催化剂在低温下表现出色,降低了CO的10ppm以下,具有很高的稳定性.
科学领域:
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 碳选择性甲化 (CO-SMET) 对于净化用于质子交换膜燃料电池的富含气是必不可少的.
- 在低温下开发具有高活性的催化剂对于高效的CO-SMET反应至关重要.
研究的目的:
- 合成和评估用于CO-SMET的RuNi/TiZrx混合金属氧化物 (RuNi/TiZrx-MMO) 催化剂.
- 调查Zr/Ti摩尔比对催化剂性能的影响,了解结构-活性关系.
主要方法:
- 通过使用Zr促进的NiTi层双氧化物 (NiTi-LDH) 前体,通过共同沉和湿浸制备催化剂.
- 使用XRD,BET,SEM,TEM,XPS,TPR和TPD进行表征.
- 在低温窗口 (180-280°C) 中评估催化性能.
主要成果:
- RuNi/TiZr0.2-MMO催化剂表现出优越的催化性能,降低了CO度低于10 ppm.
- 添加ZrO2增强了催化剂表面积,纳米粒子分散,Ni可还原性和CO吸附/激活.
- 优化的催化剂表现出优异的低温活性,长期稳定性和碳抵抗性.
结论:
- 在低温CO-SMET中,RuNi/TiZr0.2-MMO催化剂非常有效.
- 促进ZrO2是提高催化剂性能和性能的关键.
- 这种催化剂在燃料电池技术中的实际应用方面显示出希望.
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