CoPtx/?-Al2O3 bimetallic nanoalloys as promising catalysts for hydrazine electrooxidation
By Firdous, Naveeda; Janjua, Naveed Kausar
Published in Heliyon
2019
Abstract
Stable bimetallic catalysts composed of CoPtx/?-Al2O3 (x = Pt/Co molar ratio) were synthesized by wet impregnation method followed by calcination and the H2 reduction. The powders were characterized using XRD, AAS, BET, SEM, EDX, TPR, and TPO techniques. The prepared catalysts were drop casted on the glassy carbon electrode (GCE) and catalytic performance was examined for hydrazine electrooxidation in alkaline medium via cyclic voltammetry (CV). All the compositions in CoPtx/?-Al2O3 series showed high responses towards hydrazine electrooxidation, however; high activity of CoPt0.034/?-Al2O3 catalyst inferred it as a best material with an anodic peak current (iP) response of 200 ?A at 0.86 V. The prominent electrochemical (EC) responses for this composition are attributed to better accessible surface area resulting in a fast electron transfer. The CoPtx/?-Al2O3 catalysts are reported as the robust and superior prospective materials for extensive electroanalytical and catalytic studies.
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