Effect of unimodality and bimodality of Pd nanoparticles on the catalytic activity of Pd/SiO2 in the removal of diclofenac from water

Emil Kowalewski; Monika Asztemborska; Magdalena Bonarowska; Krzysztof Matus; Anna Śrębowata

doi:10.1016/j.catcom.2020.106056

Effect of unimodality and bimodality of Pd nanoparticles on the catalytic activity of Pd/SiO₂ in the removal of diclofenac from water

Emil Kowalewski
, Monika Asztemborska
, Magdalena Bonarowska
, Krzysztof Matus
, Anna Śrębowata

Materials Testing Laboratory (RMT/RMT L1)

Polish Academy of Sciences

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

In this work, we investigated the catalytic performance of uni- and bimodal Pd/SiO₂ catalysts in the aqueous phase hydrodechlorination (HDC) of diclofenac – a very popular nonsteroidal anti-inflammatory drug. Unimodality and bimodality was confirmed by temperature-programmed hydride decomposition (TPHD) and TEM. The highest activity and 100% efficiency in batch and flow mode were observed for bimodal Pd NPs. This outstanding efficiency could be attributed to the close coexistence of small and large metal nanoparticles with different affinity to hydrogen and chloroorganic compound. The obtained results encourage discussion on the necessity to strive for perfect unimodal catalysts for the HDC processes.

Original language	English
Article number	106056
Journal	Catalysis Communications
Volume	143
DOIs	https://doi.org/10.1016/j.catcom.2020.106056
Publication status	Published - 5 Aug 2020

Keywords

Batch hydrotreatment
Bimodality
Flow hydrotreatment
Palladium

ASJC Scopus subject areas

Catalysis
General Chemistry
Process Chemistry and Technology

Access to Document

10.1016/j.catcom.2020.106056

Cite this

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title = "Effect of unimodality and bimodality of Pd nanoparticles on the catalytic activity of Pd/SiO2 in the removal of diclofenac from water",

abstract = "In this work, we investigated the catalytic performance of uni- and bimodal Pd/SiO2 catalysts in the aqueous phase hydrodechlorination (HDC) of diclofenac {\textendash} a very popular nonsteroidal anti-inflammatory drug. Unimodality and bimodality was confirmed by temperature-programmed hydride decomposition (TPHD) and TEM. The highest activity and 100\% efficiency in batch and flow mode were observed for bimodal Pd NPs. This outstanding efficiency could be attributed to the close coexistence of small and large metal nanoparticles with different affinity to hydrogen and chloroorganic compound. The obtained results encourage discussion on the necessity to strive for perfect unimodal catalysts for the HDC processes.",

keywords = "Batch hydrotreatment, Bimodality, Flow hydrotreatment, Palladium",

author = "Emil Kowalewski and Monika Asztemborska and Magdalena Bonarowska and Krzysztof Matus and Anna {\'S}r{\c e}bowata",

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AU - Kowalewski, Emil

AU - Asztemborska, Monika

AU - Bonarowska, Magdalena

AU - Matus, Krzysztof

AU - Śrębowata, Anna

PY - 2020/8/5

Y1 - 2020/8/5

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AB - In this work, we investigated the catalytic performance of uni- and bimodal Pd/SiO2 catalysts in the aqueous phase hydrodechlorination (HDC) of diclofenac – a very popular nonsteroidal anti-inflammatory drug. Unimodality and bimodality was confirmed by temperature-programmed hydride decomposition (TPHD) and TEM. The highest activity and 100% efficiency in batch and flow mode were observed for bimodal Pd NPs. This outstanding efficiency could be attributed to the close coexistence of small and large metal nanoparticles with different affinity to hydrogen and chloroorganic compound. The obtained results encourage discussion on the necessity to strive for perfect unimodal catalysts for the HDC processes.

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KW - Bimodality

KW - Flow hydrotreatment

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