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- W2519251143 abstract "Abstract Surface activation and cleaning of platinum micro‐wires of 25 micron diameter has been achieved by a short one‐second electrothermal annealing treatment in air at 0.3 A (to orange glow). Voltammetric data suggest a decrease in the electrochemically active surface area with annealing time and a change in surface structure towards the Pt(100) crystalline face. The impact of electrothermal annealing on the electrocatalytic activity towards (i) oxygen reduction and (ii) glucose oxidation in pH 7 phosphate buffered aqueous solutions is investigated. In contrast to as‐received platinum, annealed platinum produces an electrocatalytic response towards glucose oxidation with increasing glucose concentration. A short one‐second anneal step is just as effective in enhancing catalysis as prolonged electrochemical cleaning in sulphuric acid. Finally, by combining a non‐annealed and an annealed microwire electrode, a very simple membrane‐free micro‐fuel cell system is devised operating in phosphate buffer at pH 7 with linearly increasing power output reaching 2.2 nW cm −2 for high glucose levels of 0.5 M." @default.
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- W2519251143 date "2016-09-14" @default.
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- W2519251143 title "Electrothermal Annealing of Catalytic Platinum Microwire Electrodes: Towards Membrane-Free pH 7 Glucose Micro-Fuel Cells" @default.
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- W2519251143 doi "https://doi.org/10.1002/elan.201600443" @default.
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