•The low coordinated Pt sites are blocked precisely by ALD Fe oxides.•The formed interfacial perimeter sites are more beneficial to the hydrogenation of CO bond.•After decoration, the selectivity to cinnamyl alcohol increased from 45% to 84%.•The characteristic of precise decoration by ALD is hard to achieve by traditional methods.The decoration of noble metal-based catalysts with metal oxides can improve their catalytic performance for the selective hydrogenation of cinnamaldehyde to cinnamyl alcohol (COL) due to the interaction between the noble metal and metal oxides. Here, we used atomic layer deposition (ALD) to decorate Pt nanoparticles precisely with Fe oxides. The selectivity to COL increased from 45% for the bare Pt catalyst to 84% for the Pt-based catalyst after 30 cycles of decoration with Fe oxide by ALD. A series of characterizations demonstrated that the precise blocking of low coordinated Pt sites with Fe oxide by ALD, generating Pt-FeOx interfacial perimeter sites, and the interaction between the Pt nanoparticles and Fe oxide led to high selectivity to COL. This precise decoration and the formation of interfacial perimeter sites by ALD provide a promising route for the design of advanced catalysts.Download high-res image (126KB)Download full-size image

Thiol-functionalized SBA-15 mesoporous silica materials with various pore sizes and specific surface areas were prepared by using a post-grafting process. All the obtained materials were characterized by SAXS, FT-IR, TGA, TEM and N2 adsorption isotherms. By using these functionalized mesoporous silica as sensing materials, the QCM sensor was constructed and used for detecting heavy metal ions. The experimental results indicated that the QCM sensor can detect 1 ppm Hg2+ with the response frequency of 175 Hz in the response time of 1 min. The influence of response time, the amount of thiol groups, pore size and specific surface area of SBA-15 mesoporous silica on Hg2+ detection was studied systematically in this paper.