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journal article·2025-04Open access

UV to IR Continuous Photocatalytic Gas‐Phase CO2 Hydrogenation Over Ni‐Doped Molybdenum Oxysulfide: An Experimental and Mechanistic Study

Arturo Sanz‐Marco, Javier Navarro‐Ruiz, Jose L. Hueso, Iann C. Gerber, Victor Sebastian, Susanne Mossin, David Nielsen, Francisco Balas, Jesus Santamaria

Carbon Energy· Volume 7· Issue 4
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Source abstract

Abstract

ABSTRACT The reduction of CO2 toward CO and CH4 over Ni‐loaded MoS2‐like layered nanomaterials is investigated. The mild hydrothermal synthesis induced the formation of a molybdenum oxysulfide (MoOxSy) phase, enriched with sulfur defects and multiple Mo oxidation states that favor the insertion of Ni2+ cations via photo‐assisted precipitation. The photocatalytic tests under LED irradiation at different wavelengths from 365 to 940 nm at 250°C rendered 1% CO2 conversion and continuous CO production up to 0.6 mmol/(gcat h). The incorporation of Ni into the MoOxSy structure boosted the continuous production of CO up to 5.1 mmol/(gcat h) with a CO2 conversion of 3.5%. In situ spectroscopic techniques and DFT simulations showed the O‐incorporated MoS2 structure, in addition to Ni clusters as a supported metal catalyst. The mechanistic study of the CO2 reduction reaction over the catalysts revealed that the reverse water–gas shift reaction is favored due to the preferential formation of carboxylic species.
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Research context

NanomaterialsCatalysis & surfaces

OpenAlex topics: Advanced Photocatalysis Techniques · Covalent Organic Framework Applications · Catalytic Processes in Materials Science

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Instituto de Nanociencia y Materiales de Aragón (INMA), Department of Chemical Engineering and Environmental Technologies University of Zaragoza and Consejo Superior de Investigaciones Científicas (CSIC) Zaragoza Spain

Networking Research Center in Biomaterials, Bioengineering and Nanomedicine (CIBER‐BBN) Madrid Spain

Laboratory of Physics and Chemistry of Nano‐Objects (LPCNO), Institut National des Sciences Appliquées (INSA‐CNRS‐UPS) Université de Toulouse Toulouse CEDEX 4 France

Escuela Politécnica Superior Universidad de Zaragoza Huesca Spain

Instituto de Investigación Sanitaria (IIS) de Aragón Zaragoza Spain

Department of Chemistry Centre for Catalysis and Sustainable Chemistry, Technical University of Denmark Kgs. Lyngby Denmark

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