Influence of cocatalysts (Ni, Co, and Cu) and synthesis method on the photocatalytic activity of exfoliated graphitic carbon nitride for hydrogen production
Rana, Adeem Ghaffar (Technical University of Munich. Department of Life Science Engineering)
Schwarze, Michael (Technische Universität Berlin. Department of Chemistry)
Tasbihi, Minoo (Technische Universität Berlin. Department of Chemistry)
Sala Román, Xavier (Universitat Autònoma de Barcelona. Departament de Química)
García-Antón, Jordi (Universitat Autònoma de Barcelona. Departament de Química)
Minceva, Mirjana (Technical University of Munich. Department of Life Science Engineering)

Data:	2022
Descripció:	13 pàg.
Resum:	Exfoliated graphitic carbon nitride (ex-g-CN) was synthesized and loaded with non-noble metals (Ni, Cu, and Co). The synthesized catalysts were tested for hydrogen production using a 300-W Xe lamp equipped with a 395 nm cutoff filter. A noncommercial double-walled quartz-glass reactor irradiated from the side was used with a 1 g/L catalyst in 20 mL of a 10 vol% triethanolamine aqueous solution. For preliminary screening, the metal-loaded ex-g-CN was synthesized using the incipient wetness impregnation method. The highest hydrogen production was observed on the Ni-loaded ex-g-CN, which was selected to assess the impact of the synthesis method on hydrogen production. Ni-loaded ex-g-CN was synthesized using different synthesis methods: incipient wetness impregnation, colloidal deposition, and precipitation deposition. The catalysts were characterized by X-ray powder diffraction, X-ray photoelectron spectroscopy, nitrogen adsorption using the Brunauer-Emmett-Teller method, and transmission electron microscopy. The Ni-loaded ex-g-CN synthesized using the colloidal method performed best with a hydrogen production rate of 43. 6 µmol h−1 g−1. By contrast, the catalysts synthesized using the impregnation and precipitation methods were less active, with 28. 2 and 10. 1 µmol h−1 g−1, respectively. The hydrogen production performance of the suspended catalyst (440 µmol m−2 g−1) showed to be superior to that of the corresponding immobilized catalyst (236 µmol m−2 g−1).
Ajuts:	Agencia Estatal de Investigación PID2019-104171-RB-I00
Nota:	Altres ajuts: Sala thanks ICREA for the ICREA Academia award 2020.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Graphitic carbon nitride ; Water splitting ; Hydrogen production ; Nickel ; Cocatalyst deposition ; SDG 7 - Affordable and Clean Energy
Publicat a:	Nanomaterials, Vol. 12, issue 22 (Nov. 2022) , art. 4006, ISSN 2079-4991

DOI: 10.3390/nano12224006
PMID: 36432291

13 p, 2.6 MB

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