HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Institute for Catalysis >
Peer-reviewed Journal Articles, etc >

Co Single Atoms in ZrO2 with Inherent Oxygen Vacancies for Selective Hydrogenation of CO2 to CO

Files in This Item:
Co-ZrO2 manuscript_210701_Accepted.pdf2.22 MBPDFView/Open
Please use this identifier to cite or link to this item:

Title: Co Single Atoms in ZrO2 with Inherent Oxygen Vacancies for Selective Hydrogenation of CO2 to CO
Authors: Dostagir, Nazmul Hasan Md Browse this author
Rattanawan, Rattanawalee Browse this author
Gao, Min Browse this author
Ota, Jin Browse this author
Hasegawa, Jun-ya Browse this author →KAKEN DB
Asakura, Kiyotaka Browse this author →KAKEN DB
Fukuoka, Atsushi Browse this author →KAKEN DB
Shrotri, Abhijit Browse this author
Keywords: CO2 hydrogenation
cobalt catalyst
oxygen vacancy
in situ DRIFT
doped oxide
RWGS reaction
Issue Date: 6-Aug-2021
Publisher: American Chemical Society
Journal Title: ACS catalysis
Volume: 11
Issue: 15
Start Page: 9450
End Page: 9461
Publisher DOI: 10.1021/acscatal.1c02041
Abstract: Controlling the selectivity of products among CO, methane, and methanol is a challenge in CO2 hydrogenation. Catalysts with oxygen vacancies are helpful for CO2 activation, but they exhibit poor CO selectivity as intermediates stabilized over oxygen vacancies undergo deep hydrogenation to methanol and methane. Here, we report the synthesis of a catalyst with isolated Co atoms in ZrO2 that exhibits oxygen vacant sites near Co atoms owing to charge imbalance between cations. The resulting catalytic site effectively adsorbs CO2 and also achieves more than 95% CO selectivity during hydrogenation. The CO selectivity was independent of other reaction parameters such as reaction pressure, space velocity, and H-2/CO2 ratio. Operando DRIFTS analysis showed that CO2 was first hydrogenated to formate, which preferentially decomposed to CO under the reaction condition instead of forming methanol. Furthermore, the adsorption of CO on active sites was less favorable than the adsorption of CO2, limiting its further hydrogenation to methane. The synergy between Co and Zr was crucial for the generation of oxygen vacancy and stabilization of formate species as an intermediate for CO formation. This study shows the importance of strategic design of atomic interface to control the selectivity of a specific product from CO2 hydrogenation.
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in [ACS Catalysis], copyright c American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Type: article (author version)
Appears in Collections:触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: Abhijit Shrotri

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University