Ensembled Ptδ+ species on Beta zeolites for efficient preferential oxidation of CO in H2

IF 11.5 Q1 CHEMISTRY, PHYSICAL Chem Catalysis Pub Date : 2025-03-10 DOI:10.1016/j.checat.2025.101302

Jia Shen, Qian Xiang, Lichuan Song, Yake Lou, Jiajie Ye, Xiao Yang, Yanglong Guo, Wangcheng Zhan, Li Wang, Xiao-Ming Cao, Xuan Tang, Sheng Dai, Yun Guo

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Abstract

The preferential oxidation of CO in H₂-rich environments (CO-PROX) is one of the most promising strategies for purifying H₂. However, developing catalysts with low noble metal loadings that can effectively operate within a wide temperature range remains a significant challenge. Here, we synthesized ensembled Pt^δ+ species on Beta zeolite (0.36 wt % Pt) through a reduction treatment. This catalyst achieved 100% CO conversion in CO-PROX across the temperature range of 25°C–220°C. The outstanding performance of this catalyst originates from the temperature-dependent dual mechanisms. Specifically, the ensembled Pt^δ+ species weaken the adsorption strength of CO and enhance activation in O₂ at elevated temperatures. Moreover, these Pt^δ+ species play a crucial role in facilitating the adsorption and dissociation of H₂ at lower temperatures, enabling it to react with O₂ and form –OH species. These –OH species readily react with CO, overcoming the challenges associated with O₂ activation.

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来源期刊

Chem Catalysis

CiteScore

10.50

自引率

6.40%

发文量

期刊介绍： Chem Catalysis is a monthly journal that publishes innovative research on fundamental and applied catalysis, providing a platform for researchers across chemistry, chemical engineering, and related fields. It serves as a premier resource for scientists and engineers in academia and industry, covering heterogeneous, homogeneous, and biocatalysis. Emphasizing transformative methods and technologies, the journal aims to advance understanding, introduce novel catalysts, and connect fundamental insights to real-world applications for societal benefit.