Carbon supported ultrafine gold phosphorus nanoparticles as highly efficient electrocatalyst for alkaline ethanol oxidation reaction. (20th March 2017)

• Record Type: Journal Article
• Authors: Li, Tongfei; Fu, Gengtao; Su, Jiahui; Wang, Yi; Lv, Yinjie; Zou, Xiuyong; Zhu, Xiaoshu; Xu, Lin; Sun, Dongmei; Tang, Yawen
• Is Part Of: Electrochimica acta. Volume 231(2017)
• Page Start: 13
• Page End: 19
• Publication Date: 2017-03-20
• Subjects: white phosphorus -- gold-phosphorus -- alloy -- electrocatalyst -- ethanol oxidation reaction; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.02.044
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: We develop a new kind of carbon supported gold-phosphorus (Au-P/C) electrocatalyst by a facile and novel phosphorus reduction method, and demonstrate the Au-P/C is a highly active and stable electrocatalyst for the ethanol oxidation reaction. Highlights: Au-P/C catalyst is synthesized by a facile and novel white-phosphorus reduce method. AuP particles with ultrafine particle-size are uniformly dispersed on carbon support. Au-P/C catalyst exhibits much higher content of P 0 than reported metal/P catalysts. Au-P/C catalysts show excellent catalytic properties for ethanol oxidation reaction. Abstract: Herein, we develop a new kind of carbon supported gold-phosphorus (Au-P/C) electrocatalyst for the alkaline ethanol oxidation reaction (EOR). The Au-P/C catalysts with different Au/P ratio (i.e., AuP/C, Au3 P2 /C and Au4 P3 /C) can be obtained by a facile and novel hot-reflux method with white phosphorus (P4 ) as reductant and ethanol as solvent. The crystal structure, composition and particle-size of the Au-P/C catalysts are investigated by X-ray diffraction (XRD), Energy Dispersive Spectrometer (EDS), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), etc. The results demonstrate that Au-P/C catalysts present an alloy phase with the high content of P, ultrafine particle-size and high dispersity on carbon support, which results in excellent electrocatalytic activity and stability towards the EOR compared with that of the free-phosphorus Au/C catalyst. In addition, among the various Au-P/C catalysts with different Au/P ratio, the AuP/C sample exhibits the best electrocatalytic performance in comparison with other Au3 P2 /C and Au4 P3 /C samples.