Synthesize of nano-sized Pd metal catalyst on Ti-containing zeolite using a photo-assisted deposition (PAD) method

Abstract

Using a photo-assisted deposition (PAD) method, the nano-sized Pd metal can be highly deposited on Ti-containing silicalite zeolite (TS-1). This nano-sized Pd metal can exhibit the high efficiency for H 2 O 2 production under a flow of H 2 and O 2 and further applied to the subsequent partial oxidation of phenol on TS-1.

Applications of Single-site Photocatalysts to the Design of Unique Surface Functional Materials

“…Recently we have successfully utilized the single-site photocatalyst (Ti-containing zeolite (TS-1) and mesoporous silica (Ti-HMS)) as the platform for the synthesis of nano-size metal catalysts by the advanced photo-assisted deposition method. The nano-sized Pt, Pd metal and PdAu alloys can be synthesized using this technique [8,[33][34][35][36][37][38]. Under UV-light irradiation of the slurry of TS-1 zeolite in an aqueous PdCl 2 solution using a high-pressure Hg lamp at 295 K for 24 h, the Pd metal precursor species can be successfully deposited on the TS-1 (Pd/Ti = 0.6) [36].…”

“…The nano-sized metal catalysts can be applied to the catalytic reactions with high efficiency [8,[33][34][35][36]. The PAD-Pt/Ti-HMS can exhibit the higher reactivity than the imp-Pt/HMS for CO oxidation reaction using a fixed-bet reactor.…”

“…It can be concluded that the photoassisted deposition methods using a single-site photocatalyst is useful technique to control the Pt particle size suitable for these reactions. With the flow of H 2 and O 2 into the aqueous slurry of the Pd/TS-1, H 2 O 2 can be produced [8,[34][35][36]. As shown in Fig.…”

“…Recently our research group has found that these singlesite photocatalysts can be used not only to promote the photocatalytic reaction but also to design the surface functional materials; nano-sized metal, alloy and binary oxide and hydrophilic transparent mesoporous thin film [33][34][35][36][37][38][39][40][41][42][43]. In this review, our recent applications of singlesite photocatalysts to the synthesis of the nano-sized metal catalysts, the visible-light sensitive binary oxide photocatalysts and the transparent mesoporous thin films as surface photo-functional materials are introduced.…”

A new nano‐(2Li2O/MgO) catalyst/porous alpha‐alumina composite for the oxidative coupling of methane reaction

“…This work considers the synthesis procedure of a nanocatalyst supported on the internal surface of an alpha-alumina porous support. The production of nanosized oxide catalyst particles has been reported in the past 9 with a low yield of C þ 2 products (\10 %) in the temperature range of 873-1098 K. To the knowledge of the authors of this work, the production of nanocatalyst/support complex structures has been the subject of just a few reports, 10,11 and no report on the specific OCM reaction system exists. It is noteworthy that forming nanostructures on support surfaces is a tricky task in materials engineering.…”