Efficient liquid-phase hydrogenation of bromate over nanosized Pd catalysts supported on TpBD-Me2 covalent organic framework

• Type: Article in International Scientific Journal
• Date: 2023

Authors

O.S.G.P. Soares (Author) FEUP; Santos, ASGG (Author) Other; Goncalves, LPL (Author) Other; Carla Orge (Author) FEUP; Kolen'ko, YV (Author) Other; Salonen, LM (Author) Other; Manuel Fernando R Pereira (Author) FEUP

Journal

Title: Catalysis Today

Vol. 418

ISSN: 0920-5861

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Associated Projects

LA LSRE-LCM - Financiamento Plurianual 2020-2023 para a Unidade LA LSRE-LCM Laboratório de Processos de Separação e Reacção - Laboratório de Catálise e Materiais

Other information

Authenticus ID: P-00Y-3JH

DOI: 10.1016/j.cattod.2023.114074

Abstract (EN): The formation of toxic and carcinogenic bromate, BrO3-, during the disinfection of fresh or seawater by ozonation poses a threat to the human health, and therefore the development of methodologies for its removal from water is of high importance. Heterocatalytic bromate hydrogenation has been widely employed to decrease the BrO3- ion concentration in water below the strict legal limit imposed. In this work, we evaluate for the first time the performance of a covalent organic framework (COF) for this reaction.TpBD-Me2 COF was synthesized on gram scale and used as both catalyst and support for Pd nanocatalysts with different Pd loadings for bromate hy-drogenation reaction. TpBD-Me2 was found to present considerable catalytic activity for BrO3- reduction with 60% conversion after 180 min. The conversion increased with increasing Pd loading of the COF, with the sample with 5% Pd on COF reaching 93% conversion after 180 min. The catalytic activity was further improved by performing an in situ pre-reduction step before the reaction, resulting in complete conversion of BrO3- already after 60 min of reaction. These results show that COF materials are efficient catalysts for this application.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8