Oxygen vacancies in ultrathin BiOCl nanosheets induced Pt for enhanced methanol oxidation

IF 7.8 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL Process Safety and Environmental Protection Pub Date : 2025-02-06 DOI:10.1016/j.psep.2025.106866

Yukun Chang , Wenyuan Zhou , Yanhui Chen , Guangshun Ran , Fangyan Cui , Zicong Yang , Hui Song , Jinshu Wang , Hongyi Li

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Abstract

Developing efficient and stable catalysts for methanol oxidation reaction (MOR) is urgent for economic development and energy scarcity. Herein, platinum (Pt) catalyst was planted on carbon nanotubes crosslinked BiOCl ultrathin nanosheets whose (001) facets enriched with oxygen vacancies. It has been found that he oxygen vacancies not only can enhance the electrical conductivity and the adsorption capability, but also can stabilize Pt due to strong metal-support interaction. The catalyst exhibits a mass activity of 2.39 A mg_Pt⁻¹, four times higher than that of the benchmark PtC. Moreover, its stability has increased by 54 times compared to PtC. Such a superior electrochemical activity is attributed to the enhancement of OH* adsorption dominantly, which is considered as the catalytically active species. Additionally, the density functional theory calculation is employed to explore the methanol oxidation mechanism with assistant of in-situ Raman test. The valuable formic acid may be produced rather than CO₂, which is expected to be applied to direct methanol fuel cells while generating additional economic benefits.

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超薄BiOCl纳米片上的氧空位诱导Pt增强甲醇氧化

开发高效稳定的甲醇氧化反应催化剂是经济发展和能源短缺的迫切需要。本文将铂（Pt）催化剂置于碳纳米管交联BiOCl超薄纳米片上，其（001）面富含氧空位。研究发现，氧空位不仅能提高导电性能和吸附性能，还能通过强的金属-载体相互作用稳定铂。催化剂的质量活度为2.39 a mgPt−1，是基准PtC的4倍。与PtC相比，其稳定性提高了54倍。这种优异的电化学活性主要归因于OH*吸附的增强，被认为是催化活性物质。利用密度泛函理论计算，结合现场拉曼实验，探讨甲醇氧化机理。可以产生有价值的甲酸而不是二氧化碳，这有望应用于直接甲醇燃料电池，同时产生额外的经济效益。

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

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.