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Your search keyword '"Aruna K. Kunhiraman"' showing total 6 results
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6 results on '"Aruna K. Kunhiraman"'

1. Enhanced Performance of Sn@Pt Core-Shell Nanocatalysts Supported on Two Different Carbon Structures for the Hydrogen Oxidation Reaction in Acid Media

Author

F. J. Rodríguez-Varela, G. Hernández-Vázquez, S. Dessources, B. Escobar-Morales, Aruna K. Kunhiraman, M. A. Garcia-Lobato, and I. L. Alonso-Lemus

Subjects
Chemistry, QD1-999
Abstract

Sn@Pt core-shell nanocatalysts, supported on Vulcan XC-72 and home-developed nitrogen-doped graphene (Sn@Pt/C and Sn@Pt/NG, respectively), were evaluated for the hydrogen oxidation reaction (HOR) in acid electrolyte. The nanocatalysts were synthesized by the bromide anion exchange (BAE) method. TEM characterization confirmed the nanosize nature of Sn@Pt/C and Sn@Pt/NG, with an average particle size of 2.1 and 2.3 nm, respectively. Sn@Pt/C delivered a similar mass limiting current density (jl, m) of the HOR compared to Sn@Pt/NG, which was higher than those of Pt/C and Pt/NG (ca. 2 and 2.3-fold increase, respectively). Moreover, the Sn@Pt/C and Sn@Pt/NG core-shell nanocatalysts demonstrated a higher specific activity related to Pt/C and Pt/NG. Mass and specific Tafel slopes further demonstrated the improved catalytic activity of Sn@Pt/C for the HOR, followed by Sn@Pt/NG. The application of the nanocatalysts was proposed for polymer electrolyte membrane fuel cells (PEMFC).

Published
2022
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6. Reviewing the use of chitosan and polydopamine for electrochemical sensing

Author

Craig E. Banks, Bart van Grinsven, Marloes Peeters, Jake McClements, Pankaj Singla, Akash Prabhu, Kasper Eersels, Aruna K. Kunhiraman, Robert D. Crapnell, and Katarina Novakovic

Subjects
GRAPHENE, Polydopamine, Biopolymer, Materials science, Biocompatibility, Sensing applications, Nanotechnology, Interfacial adhesion, 02 engineering and technology, Electrochemistry, 01 natural sciences, Analytical Chemistry, Chitosan, SURFACE-CHEMISTRY, chemistry.chemical_compound, COMPOSITES, Mucoadhesion, Electrochemical biosensor, 010401 analytical chemistry, RECOGNITION, POLYMER, SENSOR, Adhesion, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Biosensors, chemistry, ELECTRODEPOSITION, 0210 nano-technology, FILM
Abstract

Biopolymers possess highly favorable properties for electrochemical biosensing such as their inherent biocompatibility, inexpensive nature, and strong interfacial adhesion. In this mini review, we will focus on chitosan and polydopamine, two of the most commonly used biopolymers, for electrochemical sensing applications. Chitosan is a polysaccharide that exhibits high chemical resistance, offers straightforward modification and cross-linking, and possesses antibacterial properties and mucoadhesion. Polydopamine has the benefit of universal adhesion, in addition to the ability to form self-assembled structures. We will demonstrate how the unique structural and electrochemical features of these biopolymers can be used in a range of electrochemical biosensing platforms.

Published
2022

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