Preparation and catalytic activity of Pt/C materials via microwave irradiation |
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Authors: | Hong-Wen Wang Rui-Xuan Dong Hsin-Yu Chang Ching-Lin Liu Yui-Whei Chen-Yang |
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Affiliation: | Department of Chemistry, Center for Nanotechnology at CYCU, Chung-Yuan Christian University, Chung-Li 320, Taiwan, ROC |
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Abstract: | Microwave heating was employed to prepare highly dispersed Pt/C catalyst. Uniform platinum nanoparticles with average diameter of about 3.0-5.0 nm dispersed on carbon materials (XC-72) were synthesized using a domestic microwave oven. Synthesized Pt/C materials were characterized by X-ray diffraction and transmission electron microscopy. The particle size and size distribution of Pt nanoparticles greatly depend on microwave irradiation duration, where the heating temperature rises rapidly as the process proceeds. Cyclic voltammetry demonstrates that Pt/C catalysts derived from microwave irradiation for 90 s exhibits higher catalytic activity than a commercial Pt/C catalyst (E-Tek) at room temperature. The improvement in electrocatalytic activity of synthesized Pt/C materials is attributed to uniformity of particle size, well dispersion and high surface area, which is obtained around 175 °C and irradiation for 90 s. |
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Keywords: | Microwave irradiation Pt/C catalyst |
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