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Title: A wall-coated catalytic capillary microreactor for the direct formation of hydrogen peroxide
Authors: Ng, J.F.
Nie, Y. 
Chuah, G.K. 
Jaenicke, S. 
Keywords: Capillary microreactor
Direct formation
Hydrogen peroxide
Polymer-incarcerated palladium
Issue Date: 5-Feb-2010
Citation: Ng, J.F., Nie, Y., Chuah, G.K., Jaenicke, S. (2010-02-05). A wall-coated catalytic capillary microreactor for the direct formation of hydrogen peroxide. Journal of Catalysis 269 (2) : 302-308. ScholarBank@NUS Repository.
Abstract: The direct formation of hydrogen peroxide from H2 and O2 was successfully carried out in a capillary microreactor at room temperature and atmospheric pressure. A key element in sustaining the activity of the catalyst is the incarceration of the palladium nanoparticles in a cross-linkable amphiphilic polystyrene-based polymer, prepared following the protocol of Kobayashi [R. Akiyama, S. Kobayashi, J. Am. Chem. Soc. 125 (2003) 3412-3413]. The immobilization effectively reduced the leaching of palladium under acidic conditions. Applying the catalyst as a coating on the inner walls of a capillary enabled the sustained production of 1.1% hydrogen peroxide over at least 11 days. The highest catalyst utilization in a 2 mm capillary reactor was 0.54 molH2O2/h gPd. When the inner diameter of the reactor capillary was reduced to 530 μm, the rate was enhanced fourfold to 2.28 molH2O2/h gPd corresponding to a turnover frequency of 0.067 s-1. © 2009 Elsevier Inc. All rights reserved.
Source Title: Journal of Catalysis
ISSN: 00219517
DOI: 10.1016/j.jcat.2009.11.015
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