在H2丰富的流中低温CO优先氧化,超过改性Pd-Cu/Al2O3催化剂
Lijun Yue1, Wanjun Zhao1, Jinfang Li1
1Engineering Research Center of Ministry of Education for Fine Chemicals, Shanxi University, Taiyuan 030006, China; School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China.
兴奋剂显著增强了用于低温一氧化碳优先氧化 (CO-PROX) 的铜催化剂. 修改后的催化剂在富含气的大气中表现出卓越的性能和稳定性.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 首选氧化一氧化碳 (CO-PROX) 对于在燃料电池中净化 (H$_{2}$) 是至关重要的.
- 低温CO-PROX需要高度活性和选择性的催化剂.
研究的目的:
- 为了研究 (In) 兴奋剂对Pd-Cu/Al$_{2}$O$_{3}$低温CO-PROX的催化性能的影响.
- 了解In在增强CO-PROX反应机制中的作用.
主要方法:
- 合成Pd-Cu/Al$_{2}$O$_{3}$催化剂,具有极低的 (Pd) 负载 (0.06重量%) 使用共浸.
- 系统地描述催化剂的特性和30°C的性能评估.
主要成果:
- 在30°C下120分钟以上,Pd-Cu-In$_{0.25}$/Al$_{2}$O$_{3}$实现了40%的CO转化和100%的CO2选择性.
- 兴奋剂促进了铜种的分散,并促进了Pd和Cu的重新氧化.
- 改造后的催化剂表现出明显优异的性能,与未使用的Pd-Cu/Al$_{2}$O$_{3}$相比.
结论:
- 兴奋剂有效地增强了低温CO-PROX的Pd-Cu/Al$_{2}$O$_{3}$的催化活性和稳定性.
- 性能改善归因于In$_{2}$O$_{3}$的形成,增强了Pd/Cu分散,并促进了氧化还原循环.
- 这项研究为开发高效的净化催化剂提供了一个有希望的策略.
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