Platinum-rare earth intermetallic alloys as anode electrocatalysts for borohydride oxidation

被引：36
|
作者：
Santos, D. M. F. [1 ]
Saturnino, P. G. [1 ]
Maccio, D. [2 ]
Saccone, A. [2 ]
Sequeira, C. A. C. [1 ]
机构：
[1] Univ Tecn Lisboa, Inst Super Tecn, Inst Mat & Surfaces Sci & Engn, Mat Electrochem Grp, P-1049001 Lisbon, Portugal
[2] Univ Genoa, DCCI, I-16146 Genoa, Italy
来源：
CATALYSIS TODAY | 2011年 / 170卷 / 01期
关键词：
Sodium borohydride; Oxidation; Platinum-rare earth intermetallics; Cyclic voltammetry; Chronopotentiometry; Direct borohydride fuel cells; METAL CRYSTALLINE ALLOYS; HYDROGEN STORAGE ALLOY; PEM FUEL-CELLS; SODIUM-BOROHYDRIDE; ELECTROCHEMICAL OXIDATION; DIFFUSION-COEFFICIENT; LNPT(2) LN; R R; GOLD; ELECTRODES;
D O I：
10.1016/j.cattod.2011.03.037
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Sodium borohydride (NaBH4) is being actively investigated as an anodic fuel for direct borohydride fuel cells. Platinum (Pt) displays a rather good borohydride (BH4-) oxidation activity but its catalytic effect towards the BH4- hydrolysis leads to an overall number of exchanged electrons in the oxidation process, n, between 2 and 4. The doping of Pt with rare earth (RE) elements may decrease or increase the BH4- hydrolysis, thereby increasing or decreasing the n value. Among other factors, these changes will depend on the composition of the alloying elements as well as on the applied anodic potential range. In this paper, Pt and three Pt-RE intermetallic alloy (Pt-Ho, Pt-Sm, and Pt-Ce) electrodes are studied by cyclic voltammetry (CV) and chronopotentiometry (CP) in the temperature range 25-55 degrees C. Modelling of CV and CP data indicate that these Pt-RE electrodes do not show enhanced performance for the BH4- oxidation in comparison to the single Pt electrocatalyst. Of the Pt alloys, the Pt-Ho shows the highest catalytic activity for the BH4- oxidation reaction and the Pt-Ce the worst. Relevant kinetic parameters (n, alpha, k(s)) are also estimated. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：134 / 140
页数：7
相关论文
共 50 条
  • [21] A platinum aluminide diffusion barrier for the oxidation protection of titanium and titanium intermetallic alloys
    Nicholls, JR
    Winstone, MR
    Deakin, MJ
    Kerry, S
    [J]. ELEVATED TEMPERATURE COATINGS: SCIENCE AND TECHNOLOGY II, 1996, : 199 - 208
  • [22] Contribution to the study of the alloys and intermetallic compounds of aluminium with the rare-earth metals
    Saccone, A
    Cacciamani, G
    Maccio, D
    Borzone, G
    Ferro, R
    [J]. INTERMETALLICS, 1998, 6 (03) : 201 - 215
  • [23] Ternary intermetallic RAgGa, RAuGa alloys (R=light rare earth and Yb)
    Rossi, D
    Ferro, R
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2001, 317 : 521 - 524
  • [24] CONDUCTION-ELECTRON POLARIZATION IN RARE EARTH-PLATINUM ALLOYS
    VIJAYARA.R
    RAO, VUS
    MALIK, SK
    MARATHE, VR
    [J]. JOURNAL OF APPLIED PHYSICS, 1968, 39 (2P2) : 1086 - &
  • [25] On the Formation of Electrocatalysts for Methanol and Ethanol Oxidation by the Ion Beam-Assisted Deposition of Rare-Earth Metals and Platinum on Carbon Carriers
    Poplavsky, V. V.
    Dorozhko, A. V.
    Matys, V. G.
    [J]. JOURNAL OF SURFACE INVESTIGATION, 2019, 13 (06): : 1314 - 1322
  • [26] On the Formation of Electrocatalysts for Methanol and Ethanol Oxidation by the Ion Beam-Assisted Deposition of Rare-Earth Metals and Platinum on Carbon Carriers
    V. V. Poplavsky
    A. V. Dorozhko
    V. G. Matys
    [J]. Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques, 2019, 13 : 1314 - 1322
  • [27] Rare earth metal oxides as BH4~--tolerance cathode electrocatalysts for direct borohydride fuel cells
    倪学敏
    王雅东
    郭峰
    姚佩
    潘牧
    [J]. Journal of Rare Earths, 2012, 30 (05) : 437 - 441
  • [28] Rare earth metal oxides as BH4--tolerance cathode electrocatalysts for direct borohydride fuel cells
    Ni Xuemin
    Wang Yadong
    Guo Feng
    Yao Pei
    Pan Mu
    [J]. JOURNAL OF RARE EARTHS, 2012, 30 (05) : 437 - 441
  • [29] Role of Rare-Earth Alloys in Lithium Borohydride Regeneration from Hydrous Lithium Metaborate
    Zhu, Yongyang
    Shen, Shaoyang
    Yang, Xu-Sheng
    Zeng, Liming
    Tsui, Gary
    Xu, Zheng-Long
    Zhou, Qing
    Tang, Renheng
    Chan, K. C.
    [J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 2023, 11 (24): : 8931 - 8938
  • [30] THE REORDERING TRANSITION IN LAYER DISORDERED SOLIDS: RARE EARTH - TRANSITION METAL INTERMETALLIC ALLOYS
    Penton-Madrigal, Arbelio
    Estevez-Rams, Ernesto
    Azanza-Ricardo, Cristy
    Serrano, Raymundo Lora
    [J]. REVISTA CUBANA DE FISICA, 2015, 32 (02): : 74 - 79
12345