UV to IR Continuous Photocatalytic Gas‐Phase CO<sub>2</sub> Hydrogenation Over Ni‐Doped Molybdenum Oxysulfide: An Experimental and Mechanistic Study
ABSTRACT The reduction of CO 2 toward CO and CH 4 over Ni‐loaded MoS 2 ‐like layered nanomaterials is investigated. The mild hydrothermal synthesis induced the formation of a molybdenum oxysulfide (MoO x S y ) phase, enriched with sulfur defects and multiple Mo oxidation states that favor the insertion of Ni 2+ cations via photo‐assisted precipitation. The photocatalytic tests under LED irradiation at different wavelengths from 365 to 940 nm at 250°C rendered 1% CO 2 conversion and continuous CO production up to 0.6 mmol/(g cat h). The incorporation of Ni into the MoO x S y structure boosted the continuous production of CO up to 5.1 mmol/(g cat h) with a CO 2 conversion of 3.5%. In situ spectroscopic techniques and DFT simulations showed the O‐incorporated MoS 2 structure, in addition to Ni clusters as a supported metal catalyst. The mechanistic study of the CO 2 reduction reaction over the catalysts revealed that the reverse water–gas shift reaction is favored due to the preferential formation of carboxylic species.
Authors
- Iann C. Gerber (ORCID: https://orcid.org/0000-0001-5091-2655)
- D.J. Nielsen (ORCID: https://orcid.org/0000-0002-7764-1151)
- Javier Navarro‐Ruiz (ORCID: https://orcid.org/0000-0002-3604-9338)
- Susanne Mossin (ORCID: https://orcid.org/0000-0001-7763-9660)
- Arturo Sanz‐Marco (ORCID: https://orcid.org/0000-0003-1123-2635)
- José L. Hueso (ORCID: https://orcid.org/0000-0002-4546-4111)
- Francisco Balas (ORCID: https://orcid.org/0000-0001-5512-0075)
- Jesús Santamaría (ORCID: https://orcid.org/0000-0002-8701-9745)
- Víctor Sebastián (ORCID: https://orcid.org/0000-0002-7386-6484)
Institutions
- Centre National de la Recherche Scientifique (FR)
- Université Toulouse III - Paul Sabatier (FR)
- Consejo Superior de Investigaciones Científicas (ES)
- Université Fédérale de Toulouse Midi-Pyrénées (FR)
- Universidad de Zaragoza (ES)
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (ES)
- Instituto de Nanociencia y Materiales de Aragón (ES)
- Instituto de Investigación Sanitaria Aragón (ES)
- Laboratoire de Physique et Chimie des Nano-Objets (FR)
- Technical University of Denmark (DK)
Publication Details
- Journal
- Carbon Energy
- Published
- 2025-02-28
- DOI
- https://doi.org/10.1002/cey2.685
- Citations
- 1
- Primary Topic
- Advanced Photocatalysis Techniques
- Type
- article
- Field-Weighted Citation Impact
- 0.36
Funders
- Ministerio de Ciencia e Innovación
- Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina
- Universidad de Zaragoza
- Grand Équipement National De Calcul Intensif