Application of a Bismuth-Silver Nanosensor for the Simultaneous Determination of Pt-Rh and Pd-Rh Complexes

Abstract:

The present work describes the development of an electrochemical sensor for the simultaneous determination of Pd-Rh and Pt-Rh complexes using a bismuth-silver bimetallic nanofilm modified glassy carbon electrode. The electrochemical sensor was prepared by drop-casting bismuth-silver bimetallic nanoparticles on to glassy carbon electrode surfaces. The HRTEM microscopy and UV-Vis spectroscopy results of the bismuth-silver nanoparticles were compared with other work in literature. The developed nanosensor exhibited a linear working range of 0.4 - 1.4 ng/L for Pd-Rh and 0.8-1.2 ng/L for Pt-Rh DMG complexes, respectively. Very low detection limits (S/N = 3) of 0.19 ng/L for Pd (II), 0.2 ng/L Pt (II) and 0.22 ng/L for Rh (III) were obtained and the sensor was successfully applied to environmental samples.

• Periodical: Journal of Nano Research (Volume 44)
• Pages: 126-133
• DOI: https://doi.org/10.4028/www.scientific.net/JNanoR.44.126
• Online since: November 2016
• Authors: Charlton van der Horst, Bongiwe Silwana, Emmanuel Iheanyichukwu Iwuoha, Vernon Somerset*
• Keywords: Bismuth-Silver Bimetallic Nanosensor, Differential Pulse Adsorptive Stripping Voltammetry, Dimethylglyoxime, Platinum Group Metals, Simultaneous Determination

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