Seeing the light: the role of cobalt in light-assisted CO2 methanation

George E. P. O'Connell; Tze Hao Tan; Jodie A. Yuwono; Yu Wang; Amanj Kheradmand; Yijiao Jiang; Priyank V. Kumar; Rose Amal; Jason Scott; Emma C. Lovell

doi:10.1016/j.apcatb.2023.123507

Seeing the light: the role of cobalt in light-assisted CO₂ methanation

George E. P. O'Connell
, Tze Hao Tan
, Jodie A. Yuwono
, Yu Wang
, Amanj Kheradmand
, Yijiao Jiang
, Priyank V. Kumar
, Rose Amal
, Jason Scott^*
, Emma C. Lovell^*

^*Corresponding author for this work

School of Engineering

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

246 Downloads (Pure)

Abstract

Illuminating thermal catalysts with visible light is an effective strategy to reduce the thermal requirements of CO₂ methanation. In this study, we systematically varied the cobalt loading and properties of xCo/CeO₂ catalysts (between 0 and 10 wt%) to understand changes in the visible light-assisted reaction mechanism with cobalt loading. 10Co/CeO₂ had the highest CO₂ conversion of 90% at 450 °C. The light promoted the CO₂ conversion of all catalysts from 300 to 450°C, peaking for 7.5Co/CeO₂ with a 125% improvement relative to thermal conditions (300 °C) before diminishing for 10Co/CeO₂. The light facilitated the conversion of the formate intermediate adsorbed onto CeO₂. In-situ DRIFTS and DFT unveiled a particle size trade-off between maximising CO₂ adsorbed at the Co-Ce interface while minimising CO₂ adsorbed onto cobalt, which is required for the best light enhancement. These findings underscore the importance of careful deposit size optimisation to unlock the light-assisted methanation's full potential.

Original language	English
Article number	123507
Pages (from-to)	1-16
Number of pages	16
Journal	Applied Catalysis B: Environmental
Volume	343
DOIs	https://doi.org/10.1016/j.apcatb.2023.123507
Publication status	Published - Apr 2024

Bibliographical note

Copyright the Author(s) 2023. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher

Keywords

CO₂ methanation
Visible light illumination
Cobalt-ceria catalyst
Active metal
DRIFTS

Access to Document

10.1016/j.apcatb.2023.123507Licence: CC BY

Publisher version (open access)Final published version, 8.76 MBLicence: CC BY

Cite this

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title = "Seeing the light: the role of cobalt in light-assisted CO2 methanation",

abstract = "Illuminating thermal catalysts with visible light is an effective strategy to reduce the thermal requirements of CO2 methanation. In this study, we systematically varied the cobalt loading and properties of xCo/CeO2 catalysts (between 0 and 10 wt\%) to understand changes in the visible light-assisted reaction mechanism with cobalt loading. 10Co/CeO2 had the highest CO2 conversion of 90\% at 450 °C. The light promoted the CO2 conversion of all catalysts from 300 to 450°C, peaking for 7.5Co/CeO2 with a 125\% improvement relative to thermal conditions (300 °C) before diminishing for 10Co/CeO2. The light facilitated the conversion of the formate intermediate adsorbed onto CeO2. In-situ DRIFTS and DFT unveiled a particle size trade-off between maximising CO2 adsorbed at the Co-Ce interface while minimising CO2 adsorbed onto cobalt, which is required for the best light enhancement. These findings underscore the importance of careful deposit size optimisation to unlock the light-assisted methanation's full potential.",

keywords = "CO₂ methanation, Visible light illumination, Cobalt-ceria catalyst, Active metal, DRIFTS",

author = "O'Connell, \{George E. P.\} and Tan, \{Tze Hao\} and Yuwono, \{Jodie A.\} and Yu Wang and Amanj Kheradmand and Yijiao Jiang and Kumar, \{Priyank V.\} and Rose Amal and Jason Scott and Lovell, \{Emma C.\}",

note = "Copyright the Author(s) 2023. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher",

year = "2024",

month = apr,

doi = "10.1016/j.apcatb.2023.123507",

language = "English",

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T2 - the role of cobalt in light-assisted CO2 methanation

AU - O'Connell, George E. P.

AU - Tan, Tze Hao

AU - Yuwono, Jodie A.

AU - Wang, Yu

AU - Kheradmand, Amanj

AU - Jiang, Yijiao

AU - Kumar, Priyank V.

AU - Amal, Rose

AU - Scott, Jason

AU - Lovell, Emma C.

N1 - Copyright the Author(s) 2023. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher

PY - 2024/4

Y1 - 2024/4

N2 - Illuminating thermal catalysts with visible light is an effective strategy to reduce the thermal requirements of CO2 methanation. In this study, we systematically varied the cobalt loading and properties of xCo/CeO2 catalysts (between 0 and 10 wt%) to understand changes in the visible light-assisted reaction mechanism with cobalt loading. 10Co/CeO2 had the highest CO2 conversion of 90% at 450 °C. The light promoted the CO2 conversion of all catalysts from 300 to 450°C, peaking for 7.5Co/CeO2 with a 125% improvement relative to thermal conditions (300 °C) before diminishing for 10Co/CeO2. The light facilitated the conversion of the formate intermediate adsorbed onto CeO2. In-situ DRIFTS and DFT unveiled a particle size trade-off between maximising CO2 adsorbed at the Co-Ce interface while minimising CO2 adsorbed onto cobalt, which is required for the best light enhancement. These findings underscore the importance of careful deposit size optimisation to unlock the light-assisted methanation's full potential.

AB - Illuminating thermal catalysts with visible light is an effective strategy to reduce the thermal requirements of CO2 methanation. In this study, we systematically varied the cobalt loading and properties of xCo/CeO2 catalysts (between 0 and 10 wt%) to understand changes in the visible light-assisted reaction mechanism with cobalt loading. 10Co/CeO2 had the highest CO2 conversion of 90% at 450 °C. The light promoted the CO2 conversion of all catalysts from 300 to 450°C, peaking for 7.5Co/CeO2 with a 125% improvement relative to thermal conditions (300 °C) before diminishing for 10Co/CeO2. The light facilitated the conversion of the formate intermediate adsorbed onto CeO2. In-situ DRIFTS and DFT unveiled a particle size trade-off between maximising CO2 adsorbed at the Co-Ce interface while minimising CO2 adsorbed onto cobalt, which is required for the best light enhancement. These findings underscore the importance of careful deposit size optimisation to unlock the light-assisted methanation's full potential.

KW - CO₂ methanation

KW - Visible light illumination

KW - Cobalt-ceria catalyst

KW - Active metal

KW - DRIFTS

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