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Catalysts 2017, 7(4), 119; doi:10.3390/catal7040119

Microwave-Assisted Synthesis of Co3(PO4)2 Nanospheres for Electrocatalytic Oxidation of Methanol in Alkaline Media

Electrochemistry Research Group, Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
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Received: 16 January 2017 / Revised: 11 April 2017 / Accepted: 12 April 2017 / Published: 17 April 2017
(This article belongs to the Special Issue Enabling Technologies toward Green Catalysis)
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Abstract

Low-cost and high-performance advanced electrocatalysts for direct methanol fuel cells are of key significance for the improvement of environmentally-pleasant energy technologies. Herein, we report the facile synthesis of cobalt phosphate (Co3(PO4)2) nanospheres by a microwave-assisted process and utilized as an electrocatalyst for methanol oxidation. The phase formation, morphological surface structure, elemental composition, and textural properties of the synthesized (Co3(PO4)2) nanospheres have been examined by powder X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FT-IR), field emission-scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), and nitrogen adsorption-desorption isotherm investigations. The performance of an electrocatalytic oxidation of methanol over a Co3(PO4)2 nanosphere-modified electrode was evaluated in an alkaline solution using cyclic voltammetry (CV) and chronopotentiometry (CP) techniques. Detailed studies were made for the methanol oxidation by varying the experimental parameters, such as catalyst loading, methanol concentration, and long-term stability for the electro-oxidation of methanol. The good electrocatalytic performances of Co3(PO4)2 should be related to its good surface morphological structure and high number of active surface sites. The present investigation illustrates the promising application of Co3(PO4)2 nanospheres as a low-cost and more abundant electrocatalyst for direct methanol fuel cells. View Full-Text
Keywords: cobalt phosphate; direct methanol fuel cell; electrocatalysts; methanol; microwave-assisted synthesis; oxidation cobalt phosphate; direct methanol fuel cell; electrocatalysts; methanol; microwave-assisted synthesis; oxidation
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MDPI and ACS Style

Arunachalam, P.; Shaddad, M.N.; Alamoudi, A.S.; Ghanem, M.A.; Al-Mayouf, A.M. Microwave-Assisted Synthesis of Co3(PO4)2 Nanospheres for Electrocatalytic Oxidation of Methanol in Alkaline Media. Catalysts 2017, 7, 119.

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