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Issue 104, 2016, Issue in Progress
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Selective production of methanol by the electrochemical reduction of CO2 on boron-doped diamond electrodes in aqueous ammonia solution

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Abstract

The electrochemical reduction of CO2 was investigated in an aqueous ammonia solution using boron-doped diamond electrodes. Methanol was mainly produced by reduction at a potential of −1.3 V (vs. Ag/AgCl) with a faradaic efficiency as high as 24.3%. Also, even in an aqueous ammonium bicarbonate solution (pH 7.9) without CO2 bubbling, methanol was produced, while no methanol production was observed at higher (10.6) and lower pH (3.38). These observations suggest that the selectivity for methanol production in aqueous ammonia solutions is due to the electrochemical reduction of bicarbonate ions which are formed by the reaction between ammonia and CO2. Moreover, we present the important role of ammonia as an electrolyte for the selective production of methanol by electrochemical reduction of CO2.

Graphical abstract: Selective production of methanol by the electrochemical reduction of CO2 on boron-doped diamond electrodes in aqueous ammonia solution

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Publication details

The article was received on 13 Aug 2016, accepted on 11 Oct 2016, published on 18 Oct 2016 and first published online on 18 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA20466J
Citation: RSC Adv., 2016,6, 102214-102217
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    Selective production of methanol by the electrochemical reduction of CO2 on boron-doped diamond electrodes in aqueous ammonia solution

    P. K. Jiwanti, K. Natsui, K. Nakata and Y. Einaga, RSC Adv., 2016, 6, 102214
    DOI: 10.1039/C6RA20466J

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