Electrocatalytic performance of Pt-Dy alloys for direct borohydride fuel cells

被引：65

作者：

Sljukic, Biljana ^{[1
]}

Milikic, Jadranka ^{[2
]}

Santos, Diogo M. F. ^{[1
]}

Sequeira, Cesar A. C. ^{[1
]}

Maccio, Daniele ^{[3
]}

Saccone, Adriana ^{[3
]}

机构：

[1] Univ Lisbon, ICEMS, Inst Super Tecn, Av Rovisco Pais, P-1049001 Lisbon, Portugal

[2] Univ Belgrade, Fac Phys Chem, Belgrade 11158, Serbia

[3] Univ Genoa, Dipartimento Chim & Chim Ind, I-16146 Genoa, Italy

来源：

JOURNAL OF POWER SOURCES | 2014年 / 272卷

关键词：

Sodium borohydride oxidation; Platinum-dysprosium alloy electrodes; Hydrogen peroxide reduction; Direct borohydride fuel cell; PLATINUM INTERMETALLIC COMPOUNDS; HYDROGEN EVOLUTION; SODIUM-BOROHYDRIDE; OXIDATION REACTION; ELECTROCHEMICAL OXIDATION; ANODE ELECTROCATALYSTS; DIMETHYLAMINE BORANE; LNPT(2) LN; GOLD; ELECTROOXIDATION;

D O I：

10.1016/j.jpowsour.2014.08.080

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electrochemical oxidation of sodium borohydride (NaBH4) is systematically studied on platinum -dysprosium (Pt-Dy) alloys in alkaline media with respect to application in direct borohydride fuel cells (DBFCs). Using several different techniques, namely cyclic voltammetry, chronoamperometry and chronopotentiometry, reaction parameters are evaluated for NaBH4 electrooxidation in 2 M NaOH supporting electrolyte. The values obtained for the number of electrons exchanged are comparable for the two alloys and close to 2.5. Dependence of Pt-Dy alloys activity for NaBH4 oxidation on the electrolyte composition and temperature is also investigated. Test fuel cell is assembled using Pt-Dy alloy as anode, reaching peak power density of 298 mW cm(-2) at current density of 595 mA cm(-2) and cell potential of 0.5 V at 25 degrees C. Pt-Dy alloys exhibit comparable behavior with pure Pt electrode at room temperature, while at higher temperature they exhibit improved Coulombic efficiency, with the advantage of significantly lower price. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：335 / 343

页数：9

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