Tailored design of ruthenium molecular catalysts with 2,2 '-bypyridine-6,6 '-dicarboxylate and pyrazole based ligands for water oxidation
2016 (English)In: Dalton Transactions, ISSN 1477-9226, E-ISSN 1477-9234, Vol. 45, no 37, 14689-14696 p.Article in journal (Refereed) Published
With the incorporation of pyrazole and DMSO as axial ligands, a series of tailor-designed Ru water oxidation catalysts [Ru(bda)(DMSO)(L)] (H(2)bda = 2,2'-bypyridine-6,6'-dicarboxylic acid; DMSO = dimethyl sulfoxide; L = pyrazole, A-1; 4-Br-3-methyl pyrazole, B-1) and [Ru(bda)(L)(2)] (L = pyrazole, A-2; 4-Br-3-methyl pyrazole, B-2) have been generated in situ from their corresponding precursors [Ru(kappa(O,N,N)(3)-bda) (DMSO)(x)(L)(3-x)] which are in a zwitterionic form with an extra pyrazole based ligand in the equatorial position. Formation of the active catalyst has been investigated under pH 1.0 conditions. Electrochemistry and water oxidation activity of these catalysts were investigated. By fine tuning of the catalyst structure, the turnover frequency was increased up to 500 s(-1) and the stability over 6000 turnovers.
Place, publisher, year, edition, pages
Royal Society of Chemistry, 2016. Vol. 45, no 37, 14689-14696 p.
IdentifiersURN: urn:nbn:se:kth:diva-194481DOI: 10.1039/c6dt01287fISI: 000384404700029PubMedID: 27241474ScopusID: 2-s2.0-84988711010OAI: oai:DiVA.org:kth-194481DiVA: diva2:1040971
FunderSwedish Energy AgencyKnut and Alice Wallenberg FoundationSwedish Research Council
QC 201610312016-10-312016-10-282016-11-03Bibliographically approved