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Sökning: WFRF:(Verpoort K)

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1.
  • Gascon, P, et al. (författare)
  • Clinical experience with Zarzio® in Europe: what have we learned?
  • 2013
  • Ingår i: Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer. - : Springer Science and Business Media LLC. - 1433-7339. ; 21:10, s. 2925-2932
  • Tidskriftsartikel (refereegranskat)
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2.
  • Younus, H. A., et al. (författare)
  • A Robust Molecular Catalyst Generated In Situ for Photoand Electrochemical Water Oxidation
  • 2017
  • Ingår i: ChemSusChem. - : Wiley. - 1864-5631 .- 1864-564X. ; 10:5, s. 862-875
  • Tidskriftsartikel (refereegranskat)abstract
    • Water splitting is the key step towards artificial photosystems for solar energy conversion and storage in the form of chemical bonding. The oxidation of water is the bottle-neck of this process that hampers its practical utility; hence, efficient, robust, and easy to make catalytic systems based on cheap and earth-abundant materials are of exceptional importance. Herein, an in situ generated cobalt catalyst, [Co-II(TCA)(2)(H2O)(2)] (TCA=1-mesityl-1,2,3-1H-triazole-4-carboxylate), that efficiently conducts photochemical water oxidation under near-neutral conditions is presented. The catalyst showed high stability under photolytic conditions for more than 3 h of photoirradiation. During electrochemical water oxidation, the catalytic system assembled a catalyst film, which proved not to be cobalt oxide/hydroxide as normally expected, but instead, and for the first time, generated a molecular cobalt complex that incorporated the organic ligand bound to cobalt ions. The catalyst film exhibited a low overpotential for electrocatalytic water oxidation (360 mV) and high oxygen evolution peak current densities of 9 and 2.7 mA cm(-2) on glassy carbon and indium-doped tin oxide electrodes, respectively, at only 1.49 and 1.39 V ( versus a normal hydrogen electrode), respectively, under neutral conditions. This finding, exemplified on the in situ generated cobalt complex, might be applicable to other molecular systems and suggests that the formation of a catalytic film in electrochemical water oxidation experiments is not always an indication of catalyst decomposition and the formation of nanoparticles.
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