tailieunhanh - Study on electro oxidation of glycerol in alkaline medium using trimetallic pt pd ni composite electrodeprepared on glassy carbon
The effect of temperature and conversion of glycerol was studied by using cyclic voltammetry technique. The results showed that this reaction occurred following to diffusion mechanism with activation energy approximately of (kcal/mol). Moreover, conversion of glycerol by electrolysis using Pt-Pd-Ni/C catalyst also was investigated and compared with the case of using pure Pt. Electrolysis process with electrode Pt-Pd-Ni/GC and pure Pt-was occurred by the first order and this result was well-suit with the previous study about the reaction mechanism of glycerol electro-oxidation process. Obtained results showed that conversion of glycerol on the trimetallic catalyst was higher than the pure Pt. | Vietnam Journal of Science and Technology 55 (5B) (2017) 126-131 STUDY ON ELECTRO-OXIDATION OF GLYCEROL IN ALKALINE MEDIUM USING TRIMETALLIC Pt-Pd-Ni COMPOSITE ELECTRODEPREPARED ON GLASSY CARBON Huynh Thi Lan Phuong1, 2, Bui Dinh Anh1, Nguyen Van Thuc1, Nguyen Xuan Hoan1, Nguyen Thi Cam Ha1, * 1 Faculty of Chemistry, VNU-University of Science, 19 Le Thanh Tong, Ha Noi, Viet Nam 2 Faculty of Chemistry, Quy Nhon University, 170 An Duong Vuong, Quy Nhon, Viet Nam * Email: nguyencamha74@ Received: 1 August 2017; Accepted for publication: 6 October 2017 ABSTRACT In this research, the effect of temperature and conversion of glycerol was studied by using cyclic voltammetry technique. The results showed that this reaction occurred following to diffusion mechanism with activation energy approximately of (kcal/mol). Moreover, conversion of glycerol by electrolysis using Pt-Pd-Ni/C catalyst also was investigated and compared with the case of using pure Pt. Electrolysis process with electrode Pt-Pd-Ni/GC and pure Pt-was occurred by the first order and this result was well-suit with the previous study about the reaction mechanism of glycerol electro-oxidation process. Obtained results showed that conversion of glycerol on the trimetallic catalyst was higher than the pure Pt. Keywords: glycerol, oxidation, electrode, trimetallic, diffusion mechanism, conversion. 1. INTRODUCTION The electro-oxidation of alcohol is a research topic of great importance to the development of high-performance alcohol fuel cells. The direct alcohol fuel cell appears to be a promising system because the alcohol used is not reformed into hydrogen gas, but oxidized directly in the cell. Included in a group of alcohol for fuel cell is glycerol. The growth of world biodiesel production has caused a surplus of glycerol, which is generated as a byproduct of the process [1]. Therefore, the research of glycerol conversion for fuel cell application, which aims to increase the performance of
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