Supported Single Fe Atoms Prepared via Atomic Layer Deposition for Catalytic Reactions

Abstract

We report a general strategy to synthesize Fe single-atom catalysts (SACs) on various substrates (e.g., multiwalled carbon nanotubes, SiO2, and TiO2) with high Fe loading ( > 1.5 wt %) by atomic layer deposition (ALD) through optimization of ferrocene (Fe precursor) dose time. Fe/SiO2 and Fe/TiO2 SACs were used for CO oxidation reactions and catalytic degradation of a methylene blue (MB) solution, respectively. Compared with reported iron oxide catalysts, the efficiency of Fe/SiO2 for CO oxidation was more than 2 orders of magnitude higher than the reported values. The photocatalysis experiment demonstrated that TiO2 nanoparticles, deposited with two cycles of Fe ALD, showed the highest activity and had a more than 6-fold photocatalytic activity enhancement over pure TiO2 for the degradation of MB. This universal method, optimized Fe ALD, expands the potential applications of Fe SACs on different substrates.

Department(s)

Chemical and Biochemical Engineering

Comments

This work was supported in part by the National Science Foundation Grant NSF 1803812.

Keywords and Phrases

Atomic layer deposition; CO oxidation; Iron; Photocatalytic degradation; Single-atom catalyst

International Standard Serial Number (ISSN)

2574-0970

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2021 American Chemical Society (ACS), All rights reserved.

Publication Date

24 Feb 2020

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