Author, as appears in the article.: Kim, Dongseok; Bhattacharjee, Subhajit; Lam, Erwin; Casadevall, Carla; Rodriguez-Jimenez, Santiago; Reisner, Erwin
Department: Química Física i Inorgànica
URV's Author/s: Casadevall Serrano, Carla
Keywords: Carbon dots Co2 reduction Efficient H- Material-molecule interfaces Material‐molecule interfaces Molecular catalysts Photocatalysi Photocatalysis Systems Water
Abstract: A simple and precious-metal free photosystem for the reduction of aqueous CO2 to syngas (CO and H-2) is reported consisting of carbon dots (CDs) as the sole light harvester together with a molecular cobalt bis(terpyridine) CO2 reduction co-catalyst. This homogeneous photocatalytic system operates in the presence of a sacrificial electron donor (triethanolamine) in DMSO/H2O solution at ambient temperature. The photocatalytic system exhibits an activity of 7.7 +/- 0.2 mmol(syngas) g(CDs)(-1) (3.6 +/- 0.2 mmol(CO) g(CDs)(-1) and 4.1 +/- 0.1 mmol(H2) g(CDs)(-1)) after 24 hours of full solar spectrum irradiation (AM 1.5G). Spectroscopic and electrochemical characterization supports that this photocatalytic performance is attributed to a favorable association between CDs and the molecular cobalt catalyst, which results in improved interfacial photoelectron transfer and catalytic mechanism. This work provides a scalable and inexpensive platform for the development of CO2 photoreduction systems using CDs.
Thematic Areas: Astronomia / física Biomaterials Biotechnology Biotecnología Chemistry (all) Chemistry (miscellaneous) Chemistry, multidisciplinary Chemistry, physical Ciências biológicas i Engenharias ii Engineering (miscellaneous) General chemistry General materials science Interdisciplinar Materiais Materials science (all) Materials science (miscellaneous) Materials science, multidisciplinary Medicine (miscellaneous) Nanoscience & nanotechnology Nanoscience and nanotechnology Physics, applied Physics, condensed matter Química
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: carla.casadevall@urv.cat
Author identifier: 0000-0002-3090-4938
Record's date: 2025-01-28
Paper version: info:eu-repo/semantics/publishedVersion
Paper original source: Small. 20 (39): e2400057-
APA: Kim, Dongseok; Bhattacharjee, Subhajit; Lam, Erwin; Casadevall, Carla; Rodriguez-Jimenez, Santiago; Reisner, Erwin (2024). Photocatalytic CO2 Reduction Using Homogeneous Carbon Dots with a Molecular Cobalt Catalyst. Small, 20(39), e2400057-. DOI: 10.1002/smll.202400057
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Entity: Universitat Rovira i Virgili
Journal publication year: 2024
Publication Type: Journal Publications
Repositori URV