单原子催化甲烷直接转化的研究进展

Direct conversion of methane (DMC) into high-value-added chemicals (such as methanol and other compounds) is an effective way to achieve efficient utilization of natural gas. Due to the very stable structure of methane, its efficient activation under mild conditions (a non-strong acid medium system with a reaction temperature ≤ 150 °C) is extremely challenging. In recent years, single-atom catalysts (SACs) have attracted extensive attention from researchers at home and abroad because of the high utilization rate and high selectivity of active species and have been attempted to be applied to a variety of reactions. Research shows that SACs exhibit unique catalytic properties in the DMC reaction. In this review, we summarize the research progress of SACs in the DMC reaction under mild conditions, with a focus on summarizing and analyzing the catalyst design and reaction path research in the thermal catalytic reaction process. In addition, the DMC reaction on SACs involved in the photocatalytic reaction process is also analyzed. Finally, the DMC under mild conditions is summarized and prospected.

将甲烷直接转化(DMC)为高附加值化学品(如甲醇等化合物),是实现天然气高效利用的有效途径.因甲烷结构非常稳定,使其在温和条件下(反应温度≤150℃的非强酸介质体系)的高效活化极具挑战性.近年来,单原子催化剂(SACs)因其活性物种的高利用率和高选择性,已引起国内外研究者的广泛关注,并被尝试应用于多种反应.研究表明,SACs在DMC反应中表现出独特的催化性能.本综述中,我们总结了在温和条件下,SACs在DMC反应中的研究进展,重点针对热催化反应过程的催化剂设计和反应路径研究进行了归纳和分析.此外,还对光催化反应过程中涉及的SACs上的DMC反应进行了分析.最后,对温和条件下实现DMC进行了总结和展望.