Effect of Sn content on Pt/CNT electrocatalysts for direct ethanol fuel cell application

被引：7
作者：
Azcoaga Chort, M. Florencia [1 ]
Nagel, Pablo A. [1 ]
Veizaga, Natalia S. [1 ]
Rodriguez, Virginia I. [1 ]
de Miguel, Sergio R. [1 ]
机构：
[1] UNL, CONICET, Fac Ingn Quim, Inst Invest Catalisis & Petroquim Ing Jose Miguel, RA-3000 Santa Fe, Argentina
来源：
CANADIAN JOURNAL OF CHEMICAL ENGINEERING | 2022年 / 100卷 / 08期
关键词：
carbon nanotubes; conventional impregnation; direct ethanol fuel cells; PtSn; CNT electrocatalysts; CARBON-SUPPORTED PTSN; PLATINUM ALLOY CATALYSTS; ANODE CATALYSTS; RECENT PROGRESS; GRAPHENE OXIDE; FORMIC-ACID; ELECTROOXIDATION; METHANOL; OXIDATION; PERFORMANCE;
D O I：
10.1002/cjce.24252
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Several bimetallic PtSn catalysts supported on multiwalled carbon nanotubes for ethanol electro-oxidation were prepared by conventional impregnation-reduction method. The Pt loading was kept at 20 wt.% and Pt:Sn atomic ratios of 5:1, 3:1, and 1:1 were selected. The catalysts were structurally characterized by temperature programmed reduction, X-ray diffraction, X-ray photoelectron spectroscopy, H-2 chemisorption, cyclohexane dehydrogenation reaction, and transmission electron microscopy. The electrochemical characterization of the electrocatalytic materials was carried out in acid medium by cyclic voltammetry, linear sweep voltammetry, chronoamperometry, and CO stripping techniques. Among the different stoichiometries tested, the Pt(20)Sn(12.17)/CNT catalyst exhibited the highest electrocatalytic activity for ethanol oxidation reaction, with mass current density of 189.5 mA mgPt(-1) at 796 mV (vs. Ag/AgCl).
引用
收藏
页码：1848 / 1857
页数：10
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