Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7712808 | International Journal of Hydrogen Energy | 2016 | 10 Pages |
Abstract
A novel electroless technique is employed for synthesizing Cu-YSZ cermet with discrete deposition of Cu onto 8Â mol% yttria-stabilized zirconia (YSZ) and alloyed with 90 weight % Ni using electroless Ni-YSZ cermet by mechanical mixing and heat treatment under controlled atmosphere for the application as solid oxide fuel cell anode. X-ray diffractograms using Lorentzian fits revealed a shift of Ni-Cu (111) and Ni-Cu (200) peaks suggesting the solid solution of the bimetallic phases. Unique core-shell microstructures for both Cu-YSZ and Ni-Cu-YSZ with YSZ as core and Cu/Ni-Cu as shell are observed. EDAX analyses confirms 90:10 weight ratios (Ni:Cu) in the shell position for the alloy cermet. While only 23Â vol% of metal content in Cu-YSZ gives electrical conductivity of 700Â SÂ cmâ1, a reasonably high value of 490Â SÂ cmâ1 is obtained with 32Â vol% of metal in Ni-Cu-YSZ. Electroless Ni-Cu-YSZ exhibits 98% efficiency towards methane reforming in simulated biogas environment and also shows significant tolerance to H2S (upto 25Â ppm) in the input stream of the gas.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Rajashree Konar, Jayanta Mukhopadhyay, Abhijit Das Sharma, Rajendra N. Basu,