通过固相混合制备的高分散催化剂的无溶剂合成和应用
Kazu Okumura1, Sou Sugihara1, Yoshinao Yasui1
1Department of Applied Chemistry, School of Advanced Engineering, Kogakuin University, 2665-1 Nakano-machi Hachioji-city, Tokyo 192-0015, Japan.
ACS omega
|July 21, 2025
概括
这项研究开发了使用特定氧化物支的无溶剂方法的高活性催化剂. 单临床ZrO2和CeO2支持在关键化学反应中产生了优越的催化剂性能.
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
- 绿色化学 绿色化学
背景情况:
- 无溶剂催化剂合成提供环境和工艺优势.
- 开发高度分散和活性催化剂对于高效的化学转化至关重要.
研究的目的:
- 用一种简单的,无溶剂的方法制备高度分散和活性 (Ru) 催化剂.
- 研究不同固体氧化物支对Ru催化剂结构和活性的影响.
- 评估合成的催化剂在醇氧化,酸氧化和氨分解中的性能.
主要方法:
- 大量二氧化与六种固体氧化物支物 (Al2O3,SiO2,TiO2,四边形ZrO2,单临ZrO2,CeO2) 的物理混合.
- 混合样品在空气中在773到1273K的温度下进行热处理.
- 使用Ru K边缘X射线吸收细结构 (XAFS) 分析进行表征.
- 在三种不同的化学反应中对催化性能进行评估.
主要成果:
- 原子分散的Ru物种在单临床ZrO2和CeO2支上在973-1073 K.获得.
- RuO2仍然聚集在Al2O3,SiO2和四角形ZrO2.2上.
- 在较高温度 (1173-1273 K) 下,在TiO2上形成的Ru-TiO2固体溶液.
- 支持单临床ZrO2和CeO2的Ru催化剂在所有测试反应中表现出高活性和产量.
- 支持Al2O3,SiO2,TiO2和四角形ZrO2的催化剂的活性有限或不存在.
结论:
- 支持的选择显著影响Ru物种的分散和状态.
- 单临床ZrO2和CeO2是通过无溶剂合成创建高度活性,原子分散的Ru催化剂的有效支持.
- 使用最佳支物的无溶剂合成为高效的催化提供了一个有前途的途径.
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