{"title":"In-situ constructed MoOx-TiO2 interfaces with abundant oxygen vacancies for noble metal-free and high-efficiency reverse water-gas shift reaction","authors":"Lichen Shao, Yangchen Wu, Yuxian Jiang, Guiyu Huang, Dongxu Wang, Jiancong Liu","doi":"10.1016/j.apsusc.2025.163914","DOIUrl":null,"url":null,"abstract":"<div><div>Interfacial modulation of transition metal oxide composites without noble metal is of great importance for CO<sub>2</sub> hydrogenation catalytic efficiency. Herein, we propose a heterogeneous interface engineering strategy to prepare the MoO<sub>x</sub>-TiO<sub>2</sub> heterojunction catalyst with enhanced oxygen vacancy (O<sub>V</sub>), which shows outstanding catalytic performance in the reverse water–gas shift (RWGS) reaction. MoO<sub>3</sub>-TiO<sub>2</sub> heterojunction precursor is constructed by an in-situ solvent-thermal method. The electron transfer from TiO<sub>2</sub> to MoO<sub>3</sub> promotes the reduction of MoO<sub>3</sub>, contributing to the formation of the MoO<sub>x</sub>-TiO<sub>2</sub> heterojunction interface rich in O<sub>V</sub> and then facilitating the adsorption and activation of CO<sub>2</sub>. The catalyst shows excellent catalytic activity with a CO yield of 452.6 mmol g<sup>−1</sup> h<sup>−1</sup> at 400 °C. This performance is significantly improved over that of the MoO<sub>x</sub> catalyst and superior to many reported Mo-based non-noble metal catalyst systems. In this study, the effective modulation of O<sub>V</sub> of transition-metal oxides is realized by heterojunction engineering, which provides a new design paradigm for the development of high-efficiency CO<sub>2</sub> conversion catalysts.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"710 ","pages":"Article 163914"},"PeriodicalIF":6.3000,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Surface Science","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0169433225016290","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Interfacial modulation of transition metal oxide composites without noble metal is of great importance for CO2 hydrogenation catalytic efficiency. Herein, we propose a heterogeneous interface engineering strategy to prepare the MoOx-TiO2 heterojunction catalyst with enhanced oxygen vacancy (OV), which shows outstanding catalytic performance in the reverse water–gas shift (RWGS) reaction. MoO3-TiO2 heterojunction precursor is constructed by an in-situ solvent-thermal method. The electron transfer from TiO2 to MoO3 promotes the reduction of MoO3, contributing to the formation of the MoOx-TiO2 heterojunction interface rich in OV and then facilitating the adsorption and activation of CO2. The catalyst shows excellent catalytic activity with a CO yield of 452.6 mmol g−1 h−1 at 400 °C. This performance is significantly improved over that of the MoOx catalyst and superior to many reported Mo-based non-noble metal catalyst systems. In this study, the effective modulation of OV of transition-metal oxides is realized by heterojunction engineering, which provides a new design paradigm for the development of high-efficiency CO2 conversion catalysts.
期刊介绍:
Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.