Facet dependent catalytic activity of Pd nanocrystals for the remedy of organic Pollutant: A mechanistic study

Swain, S and Maithry Shenoy, B and Bhol, P and Yadav, S and Ranjan Jena, S and Hegde, G and Altaee, A and Saxena, M and Samal, AK (2021) Facet dependent catalytic activity of Pd nanocrystals for the remedy of organic Pollutant: A mechanistic study. In: Applied Surface Science, 570 .

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Abstract

The facet effect and underlying molecular mechanisms of Palladium (Pd) nanocrystals have shown a potential candidate for various applications including catalysis and organic pollutant remediation. In this report, seed mediated synthesis was used to synthesize three distinct Pd nanostructures such as cuboctahedral (Coh), octahedral (Oh), and nanocubes (NCs) by optimizing the time and the temperature. The growth of nanocrystals were directed along different low index planes such as 100 for Pd NCs, 111 for Oh, and mixed planes of 100 and 111 for Coh. To understand the facet dependent catalysis, nanocrystals were employed for the reduction of 4-Nitroaniline (4-NA) to 4-Phenylenediamine (4-PDA), studied the effect of NO2 group and the degradation of cationic dye, Rhodamine B (RhB), and anionic dye, Methyl Orange (MO). By keeping the total surface area of particles unchanged, different volume of nanocrystal solutions were used to carry out facet-dependent analysis. The reduction and degradation processes were confirmed from the absorption study that the efficiency of Pd NCs was higher than Oh and Coh. The catalytic trends for the asymmetric growth of planes follows the order of NCs 100 > Oh 111 > Coh 100 111. The specific reactivity performance of the nanocrystals were confirmed using an analytical model. © 2021 Elsevier B.V.

Item Type:	Journal Article
Publication:	Applied Surface Science
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to Elsevier B.V.
Keywords:	Azo dyes; Catalysis; Catalyst activity; Nanocrystals; Organic pollutants, Anionic dye; Cationic dye and anionic dye; Cationic dyes; Cuboctahedral; Low index plane; Mechanistic studies; Molecular mechanism; Nanocubes; Palladium nanocrystal; Palladium nanocubes, Palladium
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Biosystems Science and Engineering
Date Deposited:	03 Dec 2021 08:23
Last Modified:	03 Dec 2021 08:23
URI:	http://eprints.iisc.ac.in/id/eprint/70189

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