Effect of Carbon Doping on CO2–Reduction Activity of Single Cobalt Sites in Graphitic Carbon Nitride
Abstract
Single atom catalysts have demonstrated interesting activity in a variety of applications. In this study, we prepared single Co2+ sites on graphitic carbon nitride (C3N4), which was doped with carbon for enhanced activity in visible-light CO2 reduction. The synthesized materials were characterized with a variety of techniques, including microscopy, X-ray powder diffraction, UV-vis spectroscopy, infrared spectroscopy, photoluminescence spectroscopy, and X-ray absorption spectroscopy. Here, doping C3N4 with carbon was found to have profound effect on the photocatalytic activity of the single Co2+ sites. At relatively low levels, carbon doping enhanced the photoresponse of C3N4 in the visible region and improved charge separation upon photoactivation, thereby enhancing the photocatalytic activity. Furthermore, high levels of carbon doping were found to be detrimental to the photocatalytic activity of the single Co2+ sites by altering the structure of C3N4 and generating defect sites responsible for charge recombination.
- Authors:
-
- Univ. of New Hampshire, Durham, NH (United States)
- Stony Brook Univ., NY (United States)
- Univ. of Connecticut, Storrs, CT (United States)
- Publication Date:
- Research Org.:
- Univ. of New Hampshire, Durham, NH (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
- OSTI Identifier:
- 1786350
- Alternate Identifier(s):
- OSTI ID: 1786355; OSTI ID: 1797314; OSTI ID: 1805265
- Report Number(s):
- BNL-221727-2021-JAAM
Journal ID: ISSN 2199-692X
- Grant/Contract Number:
- SC0016417; SC0012704; SC0012335
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ChemNanoMat
- Additional Journal Information:
- Journal Volume: 7; Journal Issue: 9; Journal ID: ISSN 2199-692X
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Single atom catalyst; Carbon nitride; Cobalt; Carbon doping; CO2 reduction; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
Citation Formats
Huang, Peipei, Huang, Jiahao, Li, Junying, Zhang, Lei, He, Jie, Caputo, Christine A., Frenkel, Anatoly I., and Li, Gonghu. Effect of Carbon Doping on CO2–Reduction Activity of Single Cobalt Sites in Graphitic Carbon Nitride. United States: N. p., 2021.
Web. doi:10.1002/cnma.202100164.
Huang, Peipei, Huang, Jiahao, Li, Junying, Zhang, Lei, He, Jie, Caputo, Christine A., Frenkel, Anatoly I., & Li, Gonghu. Effect of Carbon Doping on CO2–Reduction Activity of Single Cobalt Sites in Graphitic Carbon Nitride. United States. https://doi.org/10.1002/cnma.202100164
Huang, Peipei, Huang, Jiahao, Li, Junying, Zhang, Lei, He, Jie, Caputo, Christine A., Frenkel, Anatoly I., and Li, Gonghu. Fri .
"Effect of Carbon Doping on CO2–Reduction Activity of Single Cobalt Sites in Graphitic Carbon Nitride". United States. https://doi.org/10.1002/cnma.202100164. https://www.osti.gov/servlets/purl/1786350.
@article{osti_1786350,
title = {Effect of Carbon Doping on CO2–Reduction Activity of Single Cobalt Sites in Graphitic Carbon Nitride},
author = {Huang, Peipei and Huang, Jiahao and Li, Junying and Zhang, Lei and He, Jie and Caputo, Christine A. and Frenkel, Anatoly I. and Li, Gonghu},
abstractNote = {Single atom catalysts have demonstrated interesting activity in a variety of applications. In this study, we prepared single Co2+ sites on graphitic carbon nitride (C3N4), which was doped with carbon for enhanced activity in visible-light CO2 reduction. The synthesized materials were characterized with a variety of techniques, including microscopy, X-ray powder diffraction, UV-vis spectroscopy, infrared spectroscopy, photoluminescence spectroscopy, and X-ray absorption spectroscopy. Here, doping C3N4 with carbon was found to have profound effect on the photocatalytic activity of the single Co2+ sites. At relatively low levels, carbon doping enhanced the photoresponse of C3N4 in the visible region and improved charge separation upon photoactivation, thereby enhancing the photocatalytic activity. Furthermore, high levels of carbon doping were found to be detrimental to the photocatalytic activity of the single Co2+ sites by altering the structure of C3N4 and generating defect sites responsible for charge recombination.},
doi = {10.1002/cnma.202100164},
journal = {ChemNanoMat},
number = 9,
volume = 7,
place = {United States},
year = {Fri May 28 00:00:00 EDT 2021},
month = {Fri May 28 00:00:00 EDT 2021}
}
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