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Hydroxyl radical production in aerobic aqueous solution containing metallic tungsten
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.ORCID iD: 0000-0003-0663-0751
2015 (English)In: Catalysis communications, ISSN 1566-7367, E-ISSN 1873-3905, Vol. 71, 93-96 p.Article in journal (Refereed) Published
Abstract [en]

Abstract In this work, we investigate the production of hydroxyl radicals from the W(s)/air aqueous system by quantifying the amount of scavenging product formaldehyde via the modified Hantzsch method. Tris(hydroxymethyl) aminomethane (Tris) and methanol are used as probe for HO. Meanwhile, the amount of dissolved tungsten is determined by ICP-OES. A turnover point ([W] ≈ 200 μM) is observed in the Tris case after which the production rate of CH2O overwhelms the constant rate in the methanol case. Based on the results, a mechanism is proposed for the studied system including both surface and solution reactions.

Place, publisher, year, edition, pages
2015. Vol. 71, 93-96 p.
Keyword [en]
Hydroxyl radical, Tungsten, H2O2, Oxidative dissolution, Haber–Weiss peroxide chain breakdown
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-173119DOI: 10.1016/j.catcom.2015.08.026ISI: 000362607000020Scopus ID: 2-s2.0-84940653659OAI: oai:DiVA.org:kth-173119DiVA: diva2:851748
Note

QC 20150922

Available from: 2015-09-07 Created: 2015-09-07 Last updated: 2017-12-04Bibliographically approved

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Publisher's full textScopushttp://www.sciencedirect.com/science/article/pii/S1566736715300601

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Jonsson, Mats

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