Chem Catalysis
ArticleConstructing directional component distribution in a bifunctional catalyst to boost the tandem reaction of syngas conversion
The bigger picture
Syngas is an important platform for producing a variety of value-added chemicals. The direct conversion of syngas to olefins and aromatics over oxide-zeolite bifunctional catalysts could achieve high selectivity of desired products via a tandem-reaction coupling strategy in a short-cut process. The tandem reaction usually involves the transfer or diffusion of key intermediates among catalytic components, which is critical for catalytic performance. Therefore, modulating the diffusion behavior of the intermediates is significant but remains a great challenge. Here, using a recrystallization methodology, we constructed a Cr2O3/ZSM-5 catalyst with an oriented distribution of Cr2O3 component on specific surfaces of ZSM-5. Hence, the diffusion of the intermediate and products is modulated in a directional way, highly boosting the syngas-to-aromatics conversion. This approach is thus justified as a promising and universal strategy to improve the catalytic performance in bifunctional catalysts.
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UN Sustainable Development Goals
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