NDLI: Preparation and Study of Pd Catalysts Supported on Activated Carbon Cloth (ACC) for Direct Synthesis of H$_{2}$O$_{2}$ from H$_{2}$ and O$

Content Provider	Springer Nature Link
Author	Gudarzi, Davood Ratchananusorn, Warin Turunen, Ilkka Salmi, Tapio Heinen, Markku
Copyright Year	2013
Abstract	Activated carbon cloths (ACCs) were used as supports for Pd catalysts. The catalyst preparation was carried out by the impregnation method using acidic solution of palladium dichloride (PdCl$_{2}$) as metal precursor. The effects of the oxidation state of the loaded metal, heat treatment of the catalysts in different atmosphere (H$_{2}$, air) at different temperatures and surface chemistry of the support on the catalyst characterizations and the catalytic activities were investigated. Wet oxidation of ACC was done by nitric acid in order to induce oxygen-containing surface functional groups. Surface chemistry of the support and oxidation state of the metallic phase was investigated by means of XPS, TPD, SEM, DTA and TGA tests. Direct synthesis of hydrogen peroxide from H$_{2}$ and O$_{2}$ was performed batch wise in a stainless steel autoclave. The reactions were conducted under high pressure (38 bar) at 0 °C and methanol was used as reaction medium. The direct synthesis results showed that the oxygen-containing surface functional groups increase the selectivity of the catalysts by reducing the rate of water production. Existence of the oxidized state of Pd (PdO) also makes the catalyst more selective than the corresponding zerovalent state (Pd0). PdO affected on selectivity by increasing the rate of H$_{2}$O$_{2}$ production and reducing the amount of production of water, simultaneously.
Starting Page	527
Ending Page	539
Page Count	13
File Format	PDF
ISSN	10225528
Journal	Topics in Catalysis
Volume Number	56
Issue Number	9-10
e-ISSN	15729028
Language	English
Publisher	Springer US
Publisher Date	2013-04-16
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hydrogen peroxide Direct synthesis Palladium catalyst Activated Carbon Cloth Catalyst characterization Catalysis Physical Chemistry Pharmacy Industrial Chemistry/Chemical Engineering Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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