ChemistryOpen | |
Surface Modification of Boron‐Doped Diamond with Microcrystalline Copper Phthalocyanine: Oxygen Reduction Catalysis | |
Patrick Gan1  Prof. John S. Foord1  | |
[1] Chemistry Research Laboratory, University of Oxford, Oxford, United Kingdom | |
关键词: boron-doped diamond; catalysis; copper phthalocyanine; oxygen reduction; surface modification; | |
DOI : 10.1002/open.201500075 | |
来源: Wiley | |
【 摘 要 】
Surface modification of boron-doped diamond (BDD) with copper phthalocyanine was achieved using a simple and convenient dropcast deposition, giving rise to a microcrystalline structure. Both unmodified and modified BDD electrodes of different surface terminations (namely hydrogen and oxygen) were compared via the electrochemical reduction of oxygen in aqueous solution. A significant lowering of the cathodic overpotential by about 500 mV was observed after modification of hydrogen-terminated (hydrophobic) diamond, while no voltammetric peak was seen on modified oxidised (hydrophilic) diamond, signifying greater interaction between copper phthalocyanine and the hydrogen-terminated BDD. Oxygen reduction was found to undergo a two-electron process on the modified hydrogen-terminated diamond, which was shown to be also active for the reduction of hydrogen peroxide. The lack of a further conversion of the peroxide was attributed to its rapid diffusion away from the triple phase boundary at which the reaction is expected to exclusively occur.Abstract
【 授权许可】
CC BY-NC-ND
© 2015 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.
Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
【 预 览 】
Files | Size | Format | View |
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RO202107150004574ZK.pdf | 1282KB | download |