Electroreduction of oxygen on sputter-deposited Pd nanolayers on multi-walled carbon nanotubes

被引：49
作者：
Jukk, Kristel [1 ]
Alexeyeva, Nadezda [1 ]
Sarapuu, Ave [1 ]
Ritslaid, Peeter [2 ]
Kozlova, Jekaterina [2 ]
Sammelselg, Vaeino [1 ,2 ]
Tammeveski, Kaido [1 ]
机构：
[1] Univ Tartu, Inst Chem, EE-50411 Tartu, Estonia
[2] Univ Tartu, Inst Phys, EE-51014 Tartu, Estonia
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2013年 / 38卷 / 09期
关键词：
Oxygen reduction; Pd-based catalysts; Pd/CNT composites; Magnetron sputtering; Alkaline membrane fuel cells; MEMBRANE FUEL-CELLS; REDUCTION REACTION; GLASSY-CARBON; ALKALINE-SOLUTIONS; ELECTROCHEMICAL REDUCTION; PALLADIUM NANOPARTICLES; ACID-MEDIA; ELECTRODES; NANOCUBES; DEPENDENCE;
D O I：
10.1016/j.ijhydene.2013.01.062
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 reduction of oxygen on Pd nanoparticle/multi-walled carbon nanotube (PdNP/MWCNT) catalysts was studied in acid and alkaline solutions using the rotating disk electrode (RDE) method. The PdNP/MWCNT nanocomposites were prepared by sputter-deposition of palladium onto the surface of MWCNTs. The surface morphology of the PdNP/MWCNT composites was characterised by scanning electron microscopy (SEM). The SEM images showed the formation of Pd nanolayers around MWCNTs. The RDE results revealed a high electrocatalytic activity of PdNP/MWCNT catalysts towards the oxygen reduction reaction (ORR) in alkaline media. Two Tafel regions with different slope can be distinguished. At low overpotentials the Tafel slope is close to -60 mV dec(-1) and at higher current densities the slope is approximately -100 mV dec(-1). The PdNP/MWCNT composite is a promising material to be used as a cathode catalyst for alkaline membrane fuel cells. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
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页码：3614 / 3620
页数：7
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