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

作者：Xiaofeng Wang, Baitang Jin, Ye Jin, Tianpin Wu, Lu Ma, Xinhua Liang · 发表于：ACS Applied Nano Materials · 年份：2020 · DOI：10.1021/acsanm.0c00146 · 被引用次数：96 · 研究领域：Catalytic Processes in Materials Science、Electrocatalysts for Energy Conversion、Catalysis and Oxidation Reactions

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