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Ultrahigh surface density of Co-N₂C single-atom-sites for boosting photocatalytic CO₂ reduction to methanol

Ma, Minzhi; Huang, Zeai; Doronkin, Dmitry E. ORCID iD icon 1,2; Fa, Wenjun; Rao, Zhiqiang; Zou, Yanzhao; Wang, Rui; Zhong, Yunqian; Cao, Yuehan; Zhang, Ruiyang; Zhou, Ying
1 Institut für Katalyseforschung und -technologie (IKFT), Karlsruher Institut für Technologie (KIT)
2 Institut für Technische Chemie und Polymerchemie (ITCP), Karlsruher Institut für Technologie (KIT)

Abstract:

Cobalt species as active sites for photocatalytic reduction of CO2 to valuable products such as methanol have received increasing attention, however, it remains a huge challenge to achieve the high activity. Herein, a pyrolysis-induced-vaporization strategy was successfully employed to fabricate Co/g-C3N4 single-atom catalysts (Co/g-C3N4 SACs) with surface Co atom loading up to 24.6 wt%. Systematic investigation of Co/g-C3N4 SACs formation process disclosed that concentrated-H2SO4 exfoliation of g-C3N4 nanosheets (g-C3N4 NSs) as the substrate followed by a two-step calcination process is essential to achieve ultrahigh metal loading. It was found that the ultrahigh-density of Co single-atom sites were anchored on the g-C3N4 substrate surface and coordinated with two nitrogen and one carbon atoms (Co-N2C). These single dispersed Co-N2C sites on the g-C3N4 surface were found to act not only as electron gathering centers but also as the sites of CO2 adsorption and activation, subsequently, boosting the photocatalytic methanol generation during light irradiation. ... mehr

Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -technologie (IKFT)
Institut für Technische Chemie und Polymerchemie (ITCP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 01.2022
Sprache Englisch
Identifikator ISSN: 0926-3373
KITopen-ID: 1000137304
HGF-Programm 38.03.02 (POF IV, LK 01) Power-based Fuels and Chemicals
Weitere HGF-Programme 56.98.01 (POF III, LK 01) Betrieb in MML
Erschienen in Applied catalysis / B
Verlag Elsevier
Band 300
Seiten Art.-Nr.: 120695
Vorab online veröffentlicht am 09.09.2021
Schlagwörter Cobalt, g-C$_{3}$N$_{4}$, single-atom catalysts, ultrahigh surface metal loading,, photoreduction CO$_{2}$ to methanol
Nachgewiesen in Scopus
Web of Science
Dimensions
Globale Ziele für nachhaltige Entwicklung Ziel 13 – Maßnahmen zum Klimaschutz

Postprint §
DOI: 10.5445/IR/1000137304
Veröffentlicht am 13.09.2021
Originalveröffentlichung
DOI: 10.1016/j.apcatb.2021.120695
Scopus
Zitationen: 118
Web of Science
Zitationen: 105
Dimensions
Zitationen: 116
Seitenaufrufe: 148
seit 13.09.2021
Downloads: 225
seit 11.09.2022
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