Nano-structured manganese oxide as a cathodic catalyst for enhanced oxygen reduction in a microbial fuel cell fed with a synthetic wastewater

Water Research
Xian-Wei LiuHan-Qing Yu

Abstract

Microbial fuel cells (MFCs) provide new opportunities for the simultaneous wastewater treatment and electricity generation. Enhanced oxygen reduction capacity of cost-effective metal-based catalysts in an air cathode is essential for the scale-up and commercialization of MFCs in the field of wastewater treatment. We demonstrated that a nano-structured MnO(x) material, prepared by an electrochemically deposition method, could be an effective catalyst for oxygen reduction in an MFC to generate electricity with the maximum power density of 772.8 mW/m(3) and remove organics when the MFC was fed with an acetate-laden synthetic wastewater. The nano-structured MnO(x) with the controllable size and morphology could be readily obtained with the electrochemical deposition method. Both morphology and manganese oxidation state of the nano-scale catalyst were largely dependent on the electrochemical preparation process, and they governed its catalytic activity and the cathodic oxygen reduction performance of the MFC accordingly. Furthermore, cyclic voltammetry (CV) performed on each nano-structured material suggests that the MnO(x) nanorods had an electrochemical activity towards oxygen reduction reaction via a four-electron pathway in a ne...Continue Reading

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Citations

Jan 16, 2014·Journal of Environmental Health Science & Engineering·Mohammadreza HosseinpourIran Alemzadeh
Jun 7, 2013·Environmental Science and Pollution Research International·E O'Flaherty, N F Gray
Aug 14, 2012·Biotechnology and Bioengineering·Xian-Wei LiuHan-Qing Yu
Jun 6, 2013·Bioresource Technology·Inderjeet Singh, Amreesh Chandra
Apr 6, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Alireza ValipourYoung-Ho Ahn
Aug 21, 2013·Chemical Society Reviews·Xian-Wei LiuHan-Qing Yu
Apr 13, 2012·Physical Chemistry Chemical Physics : PCCP·Chang Hyuck ChoiSeong Ihl Woo
Dec 10, 2020·The Science of the Total Environment·Williamson GustaveZheng Chen
May 14, 2014·ACS Applied Materials & Interfaces·Xian-Wei LiuHan-Qing Yu

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