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| Abstract No.: |
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Scheduled at:
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Tuesday, May 10, 2016, Yellow River Hall 11:10 AM
Novel Industrial Application
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| Title: |
Fabrication of three-dimensional electrodes by atmospheric plasma spray and high velocity oxy-fuel processes for alkaline water electrolysis
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| Authors: |
Maniya Aghasibeig / Concordia University, Canada
Christian Moreau / Concordia University, Canada
Rolf Wuthrich/ Concordia University, Canada
Ali Dolatabadi*/ Concordia University, Quebec
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| Abstract: |
Nickel-based electrode coatings for hydrogen production by alkaline water electrolysis were prepared using atmospheric plasma spray (APS) and high velocity oxy-fuel (HVOF) techniques. The surface areas of the electrodes were enhanced by deposition of three-dimensional fin arrays using wire mesh screens for masking the substrates during deposition. The coated electrodes were then characterized by studying their surface microstructure, topography and roughness. In addition, the electrochemical performance of the electrodes were evaluated by studying their steady-state polarization curves. Furthermore, the effect of the mesh densities on the activities of the electrodes was investigated. Improved electrocatalytic activities of the electrodes with three-dimensional surfaces compared to the ones deposited without using mesh could be related to their engineered surfaces with different roughness levels that were obtained by normal and off-normal deposition of the particles due to the formation of the fins. In addition, such electrode structures are expected to reduce the hydrogen evolution overpotentials by facilitation of the hydrogen gas departure from the electrodes.
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