The increasing amount of plastic waste poses serious environmental problems that threaten both ecosystems and human well-being. Hydrogenolysis has been widely studied as an effective approach for converting polyolefins into high-value liquids and waxy fuels. Their multifaceted reaction mechanism, including dehydrogenation, C–C bond cleavage, and hydrogenation, highlights the need for sophisticated catalyst design. The suppression of methane production, a persistent challenge in polyolefin hydrogenolysis, requires precise control of the cleavage site and inhibition of successive C–C bond cleavage. This delicate balance is achieved by carefully tuning the size and structure of metals. In this review, we investigate the effects of the size and structure of active sites on their catalytic activity and selectivity for the hydrogenolysis of polyolefins, including polyethylene and polypropylene. A fundamental understanding of hydrogenolysis mechanisms, combined with strategic synthetic methodologies, is crucial for creating efficient catalysts with tailored properties.

中文翻译：

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催化活性位点的尺寸和结构在聚烯烃氢解中的作用


塑料废物数量的增加造成了严重的环境问题，威胁着生态系统和人类福祉。氢解作为将聚烯烃转化为高价值液体和蜡质燃料的有效方法已被广泛研究。它们的多方面反应机制，包括脱氢、C-C 键断裂和氢化，凸显了对复杂催化剂设计的需求。抑制甲烷产生是聚烯烃氢解中的一个持续挑战，需要精确控制裂解位点并抑制连续的 C-C 键裂解。这种微妙的平衡是通过仔细调整金属的尺寸和结构来实现的。在这篇综述中，我们研究了活性位点的大小和结构对其催化活性和聚烯烃（包括聚乙烯和聚丙烯）氢解选择性的影响。对氢解机制的基本了解与战略合成方法相结合对于创造具有定制特性的高效催化剂至关重要。