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Synergetic interaction between neighbouring platinum monomers in CO 2 hydrogenation
Nature Nanotechnology ( IF 38.3 ) Pub Date : 2018-03-19 , DOI: 10.1038/s41565-018-0089-z
Hongliang Li , Liangbing Wang , Yizhou Dai , Zhengtian Pu , Zhuohan Lao , Yawei Chen , Menglin Wang , Xusheng Zheng , Junfa Zhu , Wenhua Zhang , Rui Si , Chao Ma , Jie Zeng

Exploring the interaction between two neighbouring monomers has great potential to significantly raise the performance and deepen the mechanistic understanding of heterogeneous catalysis. Herein, we demonstrate that the synergetic interaction between neighbouring Pt monomers on MoS2 greatly enhanced the CO2 hydrogenation catalytic activity and reduced the activation energy relative to isolated monomers. Neighbouring Pt monomers were achieved by increasing the Pt mass loading up to 7.5% while maintaining the atomic dispersion of Pt. Mechanistic studies reveal that neighbouring Pt monomers not only worked in synergy to vary the reaction barrier, but also underwent distinct reaction paths compared with isolated monomers. Isolated Pt monomers favour the conversion of CO2 into methanol without the formation of formic acid, whereas CO2 is hydrogenated stepwise into formic acid and methanol for neighbouring Pt monomers. The discovery of the synergetic interaction between neighbouring monomers may create a new path for manipulating catalytic properties.



中文翻译:

CO 2加氢中相邻铂单体之间的协同相互作用

探索两个相邻单体之间的相互作用具有巨大的潜力,可以显着提高性能并加深对非均相催化的机理的理解。在本文中,我们证明了MoS 2上相邻Pt单体之间的协同相互作用大大增强了CO 2加氢催化活性,并且相对于分离的单体降低了活化能。通过将Pt质量负载增加到7.5%,同时保持Pt的原子分散,可以实现相邻的Pt单体。机理研究表明,与分离的单体相比,相邻的Pt单体不仅协同作用以改变反应壁垒,而且经历了截然不同的反应路径。分离的Pt单体有利于CO 2的转化生成甲醇,而不会形成甲酸,而将CO 2逐步氢化成甲酸和甲醇,形成相邻的Pt单体。相邻单体之间协同作用的发现可能为操纵催化性能创造一条新途径。

更新日期:2018-03-20
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