Bimetallic activated carbon supported catalysts for the hydrogen reduction of bromate in water

• Type: Article in International Scientific Journal
• Date: 2015

Authors

João Restivo (Author) Other; O. S. G. P. Soares (Author) FEUP; J. J. M. Orfão (Author) FEUP; M. F. R. Pereira (Author) FEUP

Journal

Title: Catalysis Today

Vol. 249

Pages: 213-219

ISSN: 0920-5861

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 26 Citations

Scopus - 26 Citations

Associated Projects

LA 20 - Projeto Estratégico-LA 20 - 2011-2012

LA 20 - PROJECTO ESTRATÉGICO - LA 20 - 2013-2014

Other information

Authenticus ID: P-00G-2SZ

DOI: 10.1016/j.cattod.2014.10.048

Abstract (EN): The association of bromate in drinking water with several public health risks, namely related to its carcinogenic potential and its toxic nature, has led to an interest in the development of sustainable alternatives for its removal from water. The hydrogen reduction of bromate over supported heterogeneous metallic catalysts has already been shown to be an interesting alternative for the reduction of bromate into less hazardous species, without formation of additional sludges. In this work, the coupling of a noble metal with a second metal supported on activated carbon has been studied for this reaction. Several metals were used for this goal, resulting in a wide array of combinations of noble and promoter metals. All the combinations showed remarkable activity for the complete conversion of bromate into bromide, without accumulation of by-products. The role played by the second metal was extensively studied, for which experiments were conducted using physical mixtures of the corresponding monometallic catalysts and also different metal amounts on the supported bimetallic catalysts. In most cases, the presence of a second metal hindered the activity of the noble metal, when compared with the respective monometallic catalyst. In the case of the Pd-Cu bimetallic catalyst, it is possible to improve the activity obtained with the Pd catalyst. The activity of the bimetallic catalyst was shown to be dependent on the composition.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7