Journal
IONICS
Volume 24, Issue 1, Pages 201-209Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-017-2180-0
Keywords
Direct borohydride fuel cell; Ni-B nanoparticles; Anode catalyst; Cell performance
Funding
- National Natural Science Foundation of China [21543004, 21506170]
- Scientific Research Fund of the Shaanxi Provincial Education Department [2013JK0677, 2013JK0650]
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In this work, an amorphous Ni-B alloy was synthesized by chemical reduction and used in a direct borohydride fuel cell (DBFC). Characterization of the catalyst structure, composition, and morphology was performed by XRD, EDX, TEM, and SEM. In addition, the results showed that Ni-B presents as amorphous nanoparticles. The particle diameters ranged from 22 to 25 nm. The cyclic voltammetry (CV) and chronoamperometry (CA) tests proved that Ni-B has better electrocatalytic activity and higher stability towards KBH4 oxidation compared to a pure Ni catalyst. A single cell was assembled with a Ni-B anode and a LaNi0.9Ru0.1O3 cathode. A peak power density of 180 mW cm(-2) was achieved at room temperature. In addition, the fuel utilization rate was approximately 41% at a constant current density of 200 mA cm(-2), illustrating that some BH4 (-) hydrolysis occurs on the Ni-B surface. Finally, the cell had no attenuation after 180 h test, showing good stability.
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