Volume 1, 2023

Non-conventional low-temperature reverse water–gas shift reaction over highly dispersed Ru catalysts in an electric field

Abstract

The reverse water–gas shift (RWGS) reaction, a promising carbon-recycling reaction, was investigated by applying an electric field to promote the reaction at a temperature of 473 K or lower. The highly dispersed Ru/ZrTiO4 catalysts with an approximately 2 nm particle size of Ru showed high RWGS activity with a DC electric field below 473 K, whereas CO2 methanation proceeded predominantly over catalysts with larger Ru particles. The RWGS reaction in the electric field maintained high CO selectivity, suppressing CO hydrogenation into CH4 on the Ru surface by virtue of promoted hydrogen migration (surface protonics). The reaction mechanisms of the non-conventional low-temperature reverse water gas shift reaction were investigated and revealed using various characterization methods including in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) measurements. With the DC electric field, the reaction proceeds via a redox reaction where the generated oxygen vacancies are involved in CO2 activation at low temperatures. As a result, the electric field promotes both hydrogen migration and redox reactions using lattice oxygen/vacancies, resulting in high RWGS activity and selectivity even at low temperatures.

Graphical abstract: Non-conventional low-temperature reverse water–gas shift reaction over highly dispersed Ru catalysts in an electric field

Supplementary files

Transparent peer review

To support increased transparency, we offer authors the option to publish the peer review history alongside their article.

View this article’s peer review history

Article information

Article type
Paper
Submitted
10 ago 2022
Accepted
11 nov 2022
First published
29 nov 2022
This article is Open Access
Creative Commons BY-NC license

EES. Catal., 2023,1, 125-133

Non-conventional low-temperature reverse water–gas shift reaction over highly dispersed Ru catalysts in an electric field

R. Yamano, S. Ogo, N. Nakano, T. Higo and Y. Sekine, EES. Catal., 2023, 1, 125 DOI: 10.1039/D2EY00004K

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party commercial publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements