Palladium and palladium-copper alloy nano particles as superior catalyst for electrochemical oxidation of methanol for fuel cell applications

被引：55
作者：
Chowdhury, Sreya Roy [1 ]
Mukherjee, Parthasarathi [1 ]
Bhattachrya, Swapan Kumar [2 ]
机构：
[1] Jadavpur Univ, Dept Chem, Kolkata 700032, India
[2] Jadavpur Univ, Chem Phys Sect, Dept Chem, Kolkata 700032, India
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2016年 / 41卷 / 38期
关键词：
Alloy nanoparticle; Hydrothermal process; Methanol oxidation; Fuel cell; Synergic electro catalytic effect; Mechanistic pathway; ENHANCED ELECTROCATALYTIC PERFORMANCE; SIZE-CONTROLLED SYNTHESIS; RUTHENIUM ANODE CATALYST; NANOPOROUS PDCU ALLOY; BIMETALLIC NANOPARTICLES; ALKALINE MEDIA; CONTROLLABLE SYNTHESIS; ETHANOL OXIDATION; METAL-SURFACES; NI-SUPPORT;
D O I：
10.1016/j.ijhydene.2016.05.239
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：
Monometallic Pd, Cu and bimetallic Pd98Cu2, Pd94Cu6, Pd88Cu14 alloy nano particles with small average particle diameter (6-10 nm) are synthesised by facile single pot hydro thermal reduction with hydrazine solution at 75 degrees C in absence of any special capping agent. Synthesized nano-materials are characterized by X-ray, electron diffraction, different microscopic and electro-analytical studies. Graphite supported bimetallic PdxCu100-x alloy unlike mixed nano particles show synergistic and enhanced electro catalytic activity towards oxidation of methanol in alkali. The maximum specific peak current of 987 mA mg(-1) and equilibrium exchange current of 5 x 10(-6) mA mg(-1) of Pd obtained for. Pd94Cu6 alloy in the present work are much better than the corresponding values reported for PdxCu100-x composite and alloy materials. Cyclic voltammograms of possible intermediates like formaldehyde as well as sodium formate and ex-situ FTIR and chromatographic studies of reaction products reveal that Cu accelerates formation of formate rather than carbonate elucidating the plausible mechanism of the reaction. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：17072 / 17083
页数：12
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