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Heterogeneous Catalysis

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...

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相关实验视频

Updated: May 4, 2026

Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation

Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation

Published on: July 18, 2017

构建高效的基于CuO的CO氧化催化剂,具有很大的特定表面积的中孔CeO₂纳米层支持.

Yixin Zhang¹, Fen Zhao¹, Hui Yang¹

¹Collaborative Innovation Centre of the Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Joint International Research Laboratory of Climate and Environment Change (ILCEC), Nanjing 210044, China.

Nanomaterials (Basel, Switzerland)

|March 27, 2024

概括

基于氧化铜 (CuO) 的一氧化碳 (CO) 氧化催化剂合成了具有高表面积的新型半孔 (CeO₂) 纳米球. 这些增强的催化剂由于更好的CuO分散和稳定性而提高了性能.

关键词:

在CO氧化过程中,CO的氧化.基于CuO的催化剂的催化剂具有很大的特定表面积.网格中的氧气.半孔 CeO2 纳米圈的存在.氧化还原特性氧化还原性属性

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Tuning the Acidity of Pt/ CNTs Catalysts for Hydrodeoxygenation of Diphenyl Ether

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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

相关实验视频

Last Updated: May 4, 2026

Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation

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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

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:

二氧化 (CeO₂) 是氧化碳 (CO) 氧化的氧化铜 (CuO) 基催化剂的关键成分,因其氧化还原和氧气储存能力而受到重视.
支持CeO2的催化剂的催化效率通常受到支持的小特定表面积的限制.
提高CeO₂的表面积对于改善CO氧化反应中的催化剂性能至关重要.

研究的目的:

为了合成具有显著大的特定表面积的新型半孔CeO₂纳米球.
开发先进的CuO/CeO₂催化剂,利用这些半孔纳米球作为增强CO氧化支持.
研究影响这些新型材料催化性能的结构-活性关系.

主要方法:

通过改进的热水方法轻松合成半孔CeO2纳米圈.
制备CuO/CeO₂催化剂,通过在半孔CeO₂支上变化CuO负载来制备.
系统地研究催化剂特性,包括特定表面积,热稳定性,CuO分散性和氧化还原特性.
在各种条件下评估CO氧化性能.

主要成果:

成功合成了具有较大的特定表面积 (~190.4 m2 / g) 的半孔CeO纳米球.
证明了中孔CeO2的优良热稳定性,可支持高达500°C的温度.
由于高CuO分散和增加Cu⁺度和晶格氧含量,实现了显著增强的CO氧化性能.
确定了中孔结构,高Cu⁺度和晶格氧作为优越催化活性的关键因素.

结论:

半孔CeO₂纳米圈是先进的CO氧化催化剂的有希望的支材料,因为它们具有很大的表面积和热稳定性.
增强的催化活性与 CuO 分散的改善以及 CuO/CeO₂系统的有利氧化还原特性有关.
这种方法为设计用于CO氧化和其他工业应用的高性能催化剂提供了可行的策略.