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Electrochemical reduction of carbon dioxide at low overpotential.pdf

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Electrochemical reduction of carbon dioxide at low overpotential

Applied Energy 120 (2014) 85–94Contents lists available at ScienceDirect Applied Energy journal homepage: www.elsevier .com/locate /apenergyElectrochemical reduction of carbon dioxide at low overpotential on a polyaniline/Cu2O nanocomposite based electrode/10.1016/j.apenergy.2014.01.022 0306-2619/ 2014 Elsevier Ltd. All rights reserved. ? Corresponding author. Address: Climate Change Technology Research Division, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea. Tel.: +82 42 860 3623; fax: +82 42 860 3134. E-mail address: jeongsk@kier.re.kr (S.K. Jeong).Andrews Nirmala Grace a,b, Song Yi Choi a, Mari Vinoba a, Margandan Bhagiyalakshmi c, Dae Hyun Chu a, Yeoil Yoon a, Sung Chan Nama, Soon Kwan Jeong a,? aKorea Institute of Energy Research, Daejeon 305-343, Republic of Korea bCentre for Nanotechnology Research, VIT University, Vellore 632014, India cDepartment of Chemistry, Central University of Kerala, Kasaragod 671314, Indiah i g h l i g h t s Potentiostatic and current deposition technique was used to fabricate electrodes. Cu2O dispersed polyaniline electrodes was fabricated. CO2 was reduced by potential electrolysis method at different potentials. A faradaic efficiency of 30.4% and 63.0% HCOOH CH3COOH was observed at 0.3 V.g r a p h i c a l a b s t r a c ta r t i c l e i n f o Article history: Received 9 September 2013 Received in revised form 25 December 2013 Accepted 7 January 2014 Available online 14 February 2014 Keywords: Electrochemical CO2 reduction Polyaniline Cu2O H-Type cell Membrane cell Faradaic efficiencya b s t r a c t The electrochemical reduction of CO2 using Cu2O nanoparticle decorated polyaniline matrix (PANI/Cu2O) in 0.1 M tetrabutylammonium perchlorate (TBAP) andmethanol electrolyte was investigated under ambi- ent conditions. The experiment was carried out in a divided H-type two-compartment cell with a Nafion membrane as diaphragm separating the cathodic and anodic compartments. The