Synergy and site dependent kinetics of photo-thermal catalysis over Pt/TiO2 for methanol decomposition

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2024-07-01 DOI:10.1016/j.apcata.2024.119862

Chenghao Yao , Jinbiao Huang , Can Yang , Weiwei Deng , Lei Li , Zhan Lin

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引用次数: 0

Abstract

Photo-thermal catalysis which interplay the heat and light-induced effects have drawn broad attention owing to their synergistic effect to extend the capability of chemical transformation. Here, the effect of heat and/or light on methanol decomposition has been clarified. On Pt/TiO₂, light irradiation activates the TiO₂ and enhance the absorption and the oxidation of intermediates. The main intermediate under PTC condition is formaldehyde, which is the same to TC condition rather than methyl formate under PC condition. Differences CO absorption site correlates with the key intermediates under PC and TC/PTC conditions. Light and heat display their strengths in a synergistic manner, optimizing the activity to promote efficient catalytic processes which is verified to be photo-assisted thermal catalysis. This work offers detailed mechanistic understanding of the surface species and paves the way for an educated microkinetic modeling approach under photo and/or thermal condition over oxide-supported metal catalysts.

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Pt/TiO2 光热催化甲醇分解的协同作用和位点依赖动力学

光热催化是热效应和光诱导效应的交互作用，由于其协同效应可扩展化学转化能力，因而受到广泛关注。本文阐明了热和/或光对甲醇分解的影响。在 Pt/TiO2 上，光照射激活了 TiO2，增强了中间产物的吸收和氧化。PTC 条件下的主要中间产物是甲醛，这与 TC 条件相同，而不是 PC 条件下的甲酸甲酯。二氧化碳吸收位点的不同与 PC 和 TC/PTC 条件下的主要中间产物有关。光和热以协同增效的方式显示出各自的优势，优化了活性，促进了高效催化过程，这已被证实为光助热催化。这项工作提供了对表面物种的详细机理了解，并为在氧化物支撑的金属催化剂上进行光和/或热条件下的微动力学建模方法铺平了道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.