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Copper single-atoms embedded in 2D graphitic carbon nitride for the CO2 reduction

DOI: 10.1038/s41699-021-00243-y DOI Help

Authors: Claudio Cometto (Università di Padova) , Aldo Ugolotti (Università degli Studi di Milano-Bicocca) , Elisa Grazietti (Università di Padova) , Alessandro Moretto (Università di Padova) , Gregorio Bottaro (Università di Padova) , Lidia Armelao (Università di Padova; Consiglio Nazionale delle Ricerche, DSCTM CNR) , Cristiana Di Valentin (Università degli Studi di Milano-Bicocca) , Laura Calvillo (Università di Padova) , Gaetano Granozzi (Università di Padova)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Npj 2d Materials And Applications , VOL 5

State: Published (Approved)
Published: July 2021
Diamond Proposal Number(s): 25902

Open Access Open Access

Abstract: We report the study of two-dimensional graphitic carbon nitride (GCN) functionalized with copper single atoms as a catalyst for the reduction of CO2 (CO2RR). The correct GCN structure, as well as the adsorption sites and the coordination of the Cu atoms, was carefully determined by combining experimental techniques, such as X-ray diffraction, transmission electron microscopy, X-ray absorption, and X-ray photoemission spectroscopy, with DFT theoretical calculations. The CO2RR products in KHCO3 and phosphate buffer solutions were determined by rotating ring disk electrode measurements and confirmed by 1H-NMR and gas chromatography. Formate was the only liquid product obtained in bicarbonate solution, whereas only hydrogen was obtained in phosphate solution. Finally, we demonstrated that GCN is a promising substrate able to stabilize metal atoms, since the characterization of the Cu-GCN system after the electrochemical work did not show the aggregation of the copper atoms.

Subject Areas: Chemistry, Energy

Instruments: B18-Core EXAFS

Added On: 05/07/2021 10:49


Discipline Tags:

Catalysis Physical Chemistry Earth Sciences & Environment Climate Change Energy Sustainable Energy Systems Chemistry

Technical Tags:

Spectroscopy X-ray Absorption Spectroscopy (XAS)