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A high-throughput, solvent free method for dispersing metal atoms directly onto supports

Kohlrausch, Emerson C., Centurion, Higor Andrade, Lodge, Rhys W., Luo, Xuanli, Slater, Thomas, Santos, Marcos J. L., Ling, Sanliang, Mastelaro, Valmor R., Cliffe, Matthew J., Goncalves, Renato Vitalino and Alves Fernandes, Jesum 2021. A high-throughput, solvent free method for dispersing metal atoms directly onto supports. Journal of Materials Chemistry A: materials for energy and sustainability 9 (47) , pp. 26676-26679. 10.1039/D1TA08372D

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Abstract

Atomically-dispersed metal catalysts (ADMCs) on surfaces have demonstrated high activity and selectivity in many catalytic reactions. However, dispersing and stabilising individual atoms in support materials in an atom/energy-efficient scalable way still presents a significant challenge. Currently, the synthesis of ADMCs involves many steps and further filtration procedures, creating a substantial hurdle to their production at industrial scale. In this work, we develop a new pathway for producing ADMCs in which Pt atoms are stabilised in the nitrogen-interstices of a graphitic carbon nitride (g-C3N4) framework using scalable, solvent-free, one-pot magnetron sputtering deposition. Our approach has the highest reported rate of ADMC production of 4.8 mg h−1 and generates no chemical waste. Deposition of only 0.5 weight percent of Pt onto g-C3N4 led to improved hydrogen production by factor of ca. 3333 ± 450 when compared to bare g-C3N4. PL analysis showed that the deposition of Pt atoms onto g-C3N4 suppressed the charge carrier recombination from the photogenerated electron–hole pairs of Pt/g-C3N4 thereby enhance hydrogen evolution. Scanning transmission electron microscope imaging before and after the hydrogen evolution reaction revealed that the Pt atoms stabilised in g-C3N4 have a high stability, with no agglomeration observed. Herein, it is shown that this scalable and clean approach can produce effective ADMCs with no further synthetic steps required, and that they can be readily used for catalytic reactions.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Additional Information: Attribution 3.0 Unported (CC BY 3.0)
Publisher: Royal Society of Chemistry
ISSN: 2050-7488
Funders: EPSRC
Date of First Compliant Deposit: 10 March 2022
Date of Acceptance: 17 November 2021
Last Modified: 11 Mar 2022 12:15
URI: https://orca.cardiff.ac.uk/id/eprint/148262

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