Structural and electronic modulation by Ce-doping in MOF-derived In2O3@CeO2-ZrO2 catalysts for CO2 hydrogenation
Indium oxide (In2O3) has emerged as a promising catalyst for CO2 hydrogenation to methanol due to its exceptional selectivity compared with conventional Cu-based systems, which typically yield undesired by-products despite higher conversion rates. However, the reduction of In2O3 under reaction condi...
| Autores: | , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2026 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/416162 |
| Acceso en línea: | http://hdl.handle.net/10261/416162 https://api.elsevier.com/content/abstract/scopus_id/105024306136 |
| Access Level: | acceso abierto |
| Palabra clave: | Ce-doping CO2 hydrogenation Formate pathway MOF-derived |
| Sumario: | Indium oxide (In2O3) has emerged as a promising catalyst for CO2 hydrogenation to methanol due to its exceptional selectivity compared with conventional Cu-based systems, which typically yield undesired by-products despite higher conversion rates. However, the reduction of In2O3 under reaction conditions limits its long-term stability, motivating the development of robust oxide supports. In this work, we present a systematic study on the influence of cerium concentration in CeO2–ZrO2 supports on the performance of In2O3-based catalysts. A series of In2O3@Ce(100−x)Zrx materials were synthesized via a scalable and reproducible MOF-templated approach using UiO-66(Ce/Zr) precursors and subsequent calcination. Comprehensive characterization by in situ PXRD, XAS and H2-TPR revealed that low cerium incorporation (≈5 %) promotes unique Ce-Zr-In interfacial interactions, enhancing indium oxide dispersion and suppressing its reduction to metallic indium. Catalytic tests under CO2 hydrogenation conditions (25 bar, 513–573 K) demonstrated unprecedented methanol selectivity and stability for the low-Ce composition. These findings highlight the critical role of controlled Ce doping in tuning the structural and electronic properties of CeO2–ZrO2 supports and demonstrate the scalability of MOF-derived synthesis routes for designing next-generation catalysts for sustainable methanol production. |
|---|