open access

https://hdl.handle.net/2115/91223

Redox Behavior of In-O-Ti Interface for Selective Hydrogenation of CO2 to CO in Doped In-TiO2 Catalyst

英語

2023-02-08

Wiley-Blackwell

ChemCatChem

15(3)

e202201348

In the CO2 hydrogenation reaction, selective synthesis of CO at low temperature and high pressure is needed to integrate the reverse water gas shift reaction with Fischer-Tropsch synthesis. Here, we show that a mixed oxide catalyst prepared by doping indium (In) into TiO2 produces CO with the formation rate of 22 mu mol g(-1) s(-1). The CO selectivity was more than 99 % at 350 degrees C and 3 MPa pressure. Moreover, the catalyst was durable for over 100 h on stream. During reaction the interfacial In3+-O-Ti4+ sites were first reduced in presence of H-2 and then oxidized back with CO2 producing CO. Because of the redox mechanism, the formation of methanol and methane was limited. This study shows the development of a promoter-free oxide catalyst for CO2 hydrogenation and the importance of the redox property at the oxide interface for selective hydrogenation of CO2 to CO under unfavorable conditions.

学術雑誌論文

Accepted Manuscript

This is the peer reviewed version of the following article: [Dostagir, N. H. M., Fukuoka, A., Shrotri, A., ChemCatChem 2023, 15, e202201348.], which has been published in final form at https://doi.org/10.1002/cctc.202201348. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

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