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Gas-solid photoelectrocatalytic CO2 reduction using solid planar photoelectrocatalytic device ITO/RGO/ITO.
- Source :
-
Applied Surface Science . Dec2023, Vol. 639, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- [Display omitted] • Planar solid device was applied for gas-phase photoelectrocatalysis CO 2 reduction. • Heat treatment at 130 °C of GO exhibited the best CO yields under visible light. • Structure and surface properties of RGO were key factors for CO 2 reduction efficiency. • Appropriate bias improved photoelectrocatalytic performance of the device. Photoelectric co-catalysis is a promising method for carbon dioxide (CO 2) reduction due to its greater flexibility and higher reaction efficiency. However, the development of gas-phase photoelectrocatalysis is still in progress. Additionally, there is limited information available regarding the intrinsic photocatalytic capability of reduced graphene oxide (RGO) and its "structure-activity" relationship. In this study, solid planar photoelectrocatalytic (PEC) devices ITO/RGO/ITO were designed to enable gas-solid PEC CO 2 reduction. The device consists of two strip electrodes functioning as the cathode and anode, biased to create a horizontal electric field that facilitates the separation of photogenerated electron-hole pairs. RGO-130 (heat treatment at 130 °C) presented the best PEC CO 2 reduction efficiency, 2.2 times higher than photocatalysis under visible light irradiation. This enhancement can be attributed to its moderate oxygen content (48.8%), 001 crystal face and "layer upon layer" structure, all of which facilitate the separation and transfer of photogenerated carriers. Therefore, RGO is capable of acting as a stand-alone catalyst for the photocatalytic CO 2 reduction, and the appropriate design of RGO in surface and structure can improve its activity. This work provides a new perspective on research and application of PEC CO 2 reduction, in view of its environmentally safe and conducive to large-scale applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01694332
- Volume :
- 639
- Database :
- Academic Search Index
- Journal :
- Applied Surface Science
- Publication Type :
- Academic Journal
- Accession number :
- 171920452
- Full Text :
- https://doi.org/10.1016/j.apsusc.2023.158196