Selective CO production from CO2 over a metal catalyst supported on perovskite oxide in the presence of excess hydrogen

Abstract

Hydrogenation of carbon dioxide (CO2) to liquid fuels via an industrial catalytic reaction is the most effective strategy for the realization of carbon neutrality. The sequential reaction system of a reverse water–gas shift (RWGS) reaction followed by Fischer–Tropsch synthesis is a promising way to achieve this; hence, the development of catalysts with high conversion efficiency and selectivity for RWGS is required. We succeeded in the conversion of CO2 into carbon monoxide (CO) with a selectivity of 100% in the gas phase using a platinum-loaded perovskite oxide support composed of barium and zirconium, in which 10% of zirconium was substituted with yttrium (Pt/BaZr0.9Y0.1O3−δ, Pt/BZY10) at 500 °C in the gas stream with H2/CO2 = 3. Furthermore, a ruthenium-loaded catalyst (Ru/BZY10) afforded not only CO but also methane (CH4) as gaseous products. Kinetic analysis demonstrated that the activation energy was identical for both catalysts, and Fourier transform infrared spectroscopy clarified that the surface-adsorbed methoxy group was generated as a reaction intermediate only in the case of Ru/BZY10, which indicated the ability of the loaded metal for the dissociative adsorption of hydrogen. The present research is expected to provide a new methodology for the preparation of catalysts for the RWGS reaction and a quite important insight for the realization of carbon neutrality.

Graphical abstract: Selective CO production from CO2 over a metal catalyst supported on perovskite oxide in the presence of excess hydrogen

Supplementary files

Article information

Article type
Paper
Submitted
26 Jun 2024
Accepted
05 Aug 2024
First published
11 Sep 2024

Catal. Sci. Technol., 2024, Advance Article

Selective CO production from CO2 over a metal catalyst supported on perovskite oxide in the presence of excess hydrogen

K. Tashiro, S. Sekizawa, W. Doi, H. Konno, K. Izutani, T. Furukawa, A. Yanagita and S. Satokawa, Catal. Sci. Technol., 2024, Advance Article , DOI: 10.1039/D4CY00797B

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