title: Delivery of Highly Active Noble-Metal Nanoparticles into Microspherical Supports by an Aerosol-Spray Method.
abstract: Noble metal nanoparticles (NPs) with 1-5 nm diameter obtained from NaHB4 reduction possess high catalytic activity. However, they are rarely used directly. This work presents a facile, versatile, and efficient aerosol-spray approach to deliver noble-metal NPs into metal oxide supports, while maintaining the size of the NPs and the ability to easily adjust the loading amount. In comparison with the conventional spray approach, the size of the loaded noble-metal nanoparticles can be significantly decreased. An investigation of the 4-nitrophenol hydrogenation reaction catalyzed by these materials suggests that the NPs/oxides catalysts have high activity and good endurance. For 1 % Au/CeO2 and Pd/Al2 O3 catalysts, the rate constants reach 2.03 and 1.46 min(-1) , which is much higher than many other reports with the same noble-metal loading scale. Besides, the thermal stability of catalysts can be significantly enhanced by modifying the supports. Therefore, this work contributes an efficient method as well as some guidance on how to produce highly active and stable supported noble-metal catalysts.
authors.affiliation: College of Chemistry and Materials Science, Anhui Normal University, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Center for Nano Science and Technology, Anhui Normal University, No.1 Beijing East Road, Wuhu, 241000 (P.R. China).
authors.forename: Erjie
authors.initials: E
authors.lastname: Kan
authors.affiliation: College of Chemistry and Materials Science, Anhui Normal University, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Center for Nano Science and Technology, Anhui Normal University, No.1 Beijing East Road, Wuhu, 241000 (P.R. China).
authors.forename: Long
authors.initials: L
authors.lastname: Kuai
authors.affiliation: College of Chemistry and Materials Science, Anhui Normal University, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Center for Nano Science and Technology, Anhui Normal University, No.1 Beijing East Road, Wuhu, 241000 (P.R. China).
authors.forename: Wenhai
authors.initials: W
authors.lastname: Wang
authors.affiliation: College of Chemistry and Materials Science, Anhui Normal University, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Center for Nano Science and Technology, Anhui Normal University, No.1 Beijing East Road, Wuhu, 241000 (P.R. China). bygeng@ahnu.edu.cn.
authors.forename: Baoyou
authors.initials: B
authors.lastname: Geng
keywords: aerosol sprays; homogeneous catalysis; hydrogenation; nanoparticles; noble metals; supported catalysts