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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:58 |
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Conference: Bucharest University Faculty of Physics 2011 Meeting
Section: Polymer Physics
Title:
Skeletal raney nickel alloy: application in fuel cells
Authors:
Alexandra M. I. Trefilov, Cristina E. Serban, Nicoleta Banu, A. Marinescu, Ana Cucu, Adriana Andronie, St. M. Iordache, Se. Stamatin and I. Stamatin
Affiliation:
University of Bucharest, Physics Department, 3 Nano-SAE Research Centre, Bucharest, Romania
E-mail
office@3nanosae.org
Keywords:
PEM fuel cell, nanomaterials, Raney-Ni catalyst
Abstract:
Skeletal nickel alloys catalysts were first introduced in 1924 and since then they have attracted much attention for hydrogenation of organic compounds due to their high catalytic activity and inexpensive high-surface area substrates. Raney nickel alloys are considered as catalyst for fuel cells operating at low temperatures (Proton Exchange Membrane Fuel Cell - PEMFC, Alkaline Fuel cell - AFC etc).
Raney Nickel alloys (Ni and Al ratio 50:50) was synthesized at 800°C, followed by an activation process with concentrated sodium hydroxide solution (20wt% in water), leading to alloys with quenched structures consisting of the intermetallics: Ni2A13, NiA13, and some frozen eutectic. The aim of this work is to investigate the influence of the phase composition of Raney nickel alloy on the catalytic performance. The catalyst morphology was investigated by optical microscopy and the Raney Ni nanostructures oxidation potentials were evaluated by cyclic voltammetry and tested in a PEMFC (proton exchange membrane fuel cell) feed with H2/air at different temperatures (25-800C) to define open circuit potential and maximum current density
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