在Ce0.90在0.10Oδ上构建高效的CuAg纳米合金,用于低温甲醇深氧化催化
Gang Chen1, Lulu Zhou1, Yongli Xiao1
1College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan, 610500, P. R. China.
ChemPlusChem
|March 5, 2024
概括
为低温甲醇深氧化开发高效的催化剂仍然具有挑战性. 这项研究在氧化物纳米棒上引入了高度分散的CuAg合金催化剂,显示出对甲醇氧化具有优越的活性和稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 纳米技术纳米技术
背景情况:
- 在低温下深氧化甲醇对于环境应用至关重要,但面临着催化效率的挑战.
- 开发具有增强活性和稳定性的新型催化剂对于有效的甲醇氧化至关重要.
研究的目的:
- 在氧化物 (Ce$_{0.90}$In$_{0.10}$O$_{\delta}$) 纳米基板上构建高度分散的铜银 (CuAg) 合金催化剂.
- 为了研究CuAg合金催化剂的催化性能,以在低温下深度氧化甲醇.
主要方法:
- 使用X射线衍射 (XRD),传输电子显微镜 (TEM),紫外线光谱和X射线光电子光谱 (XPS) 的催化剂表征.
- 通过甲醇深氧化反应评估催化活性和稳定性.
- 分析CuAg合金和Ce$_{0.90}$In$_{0.10}$O$_{\delta}$支之间的协同效应.
主要成果:
- Cu$_{x}$Ag$_{100-x}$/Ce$_{0.90}$In$_{0.10}$O$_{\delta}$合金催化剂在与纯 Ag/Ce$_{0.90}$In$_{0.10}$O$_{\delta}$相比表现出更高的活性和稳定性.
- 在Cu$_{40}$Ag$_{60}$/Ce$_{0.90}$In$_{0.10}$O$_{\delta}$催化剂表现出最高的活动,光 (T$_{50}$) 和完全转换 (T$_{90}$) 温度分别为115°C和145°C.
- 在CuAg合金中的协同效应导致了电子转移,增加了Ag0种,增强了CuAg支相互作用,增加了Ce3+含量,增加了氧空度.
结论:
- CuAg合金催化剂在低温下对高效的甲醇深氧化具有显著的前景.
- 增强的催化性能归因于CuAg合金中的协同效应及其与Ce$_{0.90}$In$_{0.10}$O$_{\delta}$支的相互作用.
- 这项工作为CuAg合金催化剂在甲醇氧化热催化反应中的应用提供了宝贵的见解.
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