摘要
甲烷作为天然气的主要成分,全球储量丰富,将其转化为高附加值化学品具有重要的经济和环保意义。其中甲醇路径具有较高的能量密度,能够有效促进“甲醇经济”发展。传统的甲烷制甲醇方法是通过水蒸气重整反应生成合成气,随后在高压下合成甲醇,但这一过程能耗极大。光催化甲烷氧化反应作为一种新的催化途径,能够利用催化剂在光激发下产生的电子和空穴活化甲烷分子的C-H键,克服了传统方法的热力学限制,使得甲烷氧化能够在温和条件下进行,减少了高温高压条件下催化剂失活及积碳等问题。金属有机框架材料具有可调控的结构和优异的光催化性能,因此在光催化领域备受关注。本文系统综述了甲烷光氧化反应金属有机框架基催化剂优化策略,包括光敏配体优化、金属助剂引入、以及界面优化策略,梳理了金属有机框架材料光催化甲烷氧化的研究进展与面临的关键科学问题。
Methane,as the primary component of natural gas,is abundant in global reserves,its conversion into high-value-added chemicals holds substantial economic and environmental significance.Among various conversion pathways,the methanol route offers a higher energy density and can effectively facilitate the advancement of the"methanol economy".Traditional methods for methane-to-methanol conversion typically involve the generation of syngas through steam reforming,followed by methanol synthesis under high pressure.However,this process is highly energy-intensive.The photocatalytic methane oxidation reaction,as an emerging catalytic approach,leverages the electrons and holes generated by the catalyst upon light excitation to activate the C-H bonds of methane molecules,overcoming the thermodynamic constraints of conventional methods.This enables methane oxidation to occur under milder conditions,mitigating issues such as catalyst deactivation and carbon deposition under high-temperature and high-pressure environments.Metal-organic frameworks(MOFs),with their tunable structures and superior photocatalytic properties,have garnered significant attention in the field of photocatalysis.This review provides a comprehensive analysis of optimization strategies for MOF-based catalysts in the photocatalytic methane oxidation reaction,including strategies for optimizing photosensitive ligands,introducing metal co-catalysts,and optimizing interfaces.Additionally,it outlines the progress in research and identifies the key scientific challenges in MOF-based photocatalytic methane oxidation.
作者
李佳倪
LI Jiani(Department of Catalytic Science,Sinopec(Beijing)Research Institute of Chemical Industry Co.,Ltd.,Beijing 100084,China)
出处
《山东化工》
2025年第14期68-74,共7页
Shandong Chemical Industry
关键词
金属有机框架
甲烷氧化
光催化
metal-organic frameworks
methane oxidation
photocatalysis
