an0c00146_si_001.pdf (1.58 MB)
Supported Single Fe Atoms Prepared via Atomic Layer Deposition for Catalytic Reactions
journal contribution
posted on 2020-03-05, 15:04 authored by Xiaofeng Wang, Baitang Jin, Ye Jin, Tianpin Wu, Lu Ma, Xinhua LiangWe
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.