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火焰合成的Co-CeO₂ 催化剂用于CO₂ 甲化

Angelina Evtushkova¹, Jason M J J Heinrichs¹, Alexander Parastaev¹

¹Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.

ACS catalysis

|July 10, 2025

概括

火焰喷雾热解产生了定制的氧化物催化剂,用于选择性二氧化碳化. 不同的含量控制产品的选择性,有利于甲或一氧化碳的形成.

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:

选择性地将二氧化碳 (CO2) 转化为有价值的产品,如CO,CH4或CH3OH,是催化的一个重大挑战.
金属支接口对二氧化碳化中的催化活性和选择性产生了重大影响.
优化金属颗粒的大小,位置和与支物的相互作用是催化剂设计的关键.

研究的目的:

通过火焰喷雾热解 (FSP) 合成具有可控 (Co) 含量的Co-CeO2催化剂.
研究的位置和结构对二氧化碳化中的催化活性和选择性的影响.
为了理解物种和氧化之间的协同作用,支持.

主要方法:

火焰喷雾热解 (FSP) 用于合成具有不同负载的Co-CeO2催化剂.
催化剂结构的表征,包括颗粒大小和氧化状态.
在200°C时测试二氧化碳化的催化性能.

主要成果:

具有≥5mol%Co的催化剂显示出分离的CoO/Co3O4颗粒,在10mol%Co-CeO2样本中部分降解为金属Co纳米颗粒 (4-5nm).
10摩尔%的Co-CeO2催化剂表现出最高的Co-weight-normalized活动用于CH4生产 (85%的选择性).
2.5 摩尔 % Co-CeO2 样本,具有最小的 Co 减少和小的 Co 集群,通过 Co2+-O-Ce 位点和氧气空缺有利于通过 CO 形成 (79% 的选择性).

结论:

FSP是一种有效的调整Co-CeO2催化剂结构的方法,用于选择性CO2化.
小金属纳米粒子主要产生甲,而CO2+-O-Ce位点和小集群更倾向于一氧化碳.
催化剂设计利用金属颗粒与氧化支之间的相互作用,可以控制二氧化碳化路径.

关键词:

二氧化碳的甲化.这就是CeO2 .合作伙伴合作伙伴 Co−O−Ce 的接口接口.火焰喷雾的热解.有空缺的氧气位

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