From trash to resource: recovered-Pd from spent three-way catalysts as a precursor of an effective photo-catalyst for H 2 production

V. Gombac, T. Montini, Andrea Falqui, D. Loche, M. Prato, Alessandro Genovese, M. L. Mercuri, A. Serpe, P. Fornasiero, P. Deplano

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

The successful production of a nanostructured and highly dispersed Pd-TiO2 photo-catalyst, using [Pd(Me2dazdt)2](I3)2 (Me2dazdt = N,N′-dimethyl-perhydrodiazepine-2,3-dithione) salt, obtained through the selective and safe recovery of palladium from model exhaust three-way catalysts (TWCs), is reported here. The photo-catalyst prepared by the impregnation/photo-reduction of palladium on the support showed improved performance in H2 production from methanol and in glycerol photo-reforming compared to reference photo-catalysts obtained from conventional Pd-salts. The reported results represent a case of successful palladium “recovery and re-employment” and thus constitute an example of green chemistry by providing, in one route, the environmentally friendly recovery of a critical metal and its employment in the renewable energy field.
Original languageEnglish (US)
Pages (from-to)2745-2752
Number of pages8
JournalGreen Chem.
Volume18
Issue number9
DOIs
StatePublished - 2016

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: 3R Metals Ltd, Sardegna Ricerche (Project POR Sardegna 2000-06 Mis. 3.13 Az. Creazione Imprese Innovative), University of Cagliari and Trieste (Project FRA2013), MIUR – Italy (project HI-PHUTURE protocol 2010N3T9M4), Regione Sardegna (Project P.O. FSE 2007-2013 Asse IV Capitale umano – Linea di attività I.3.1, 2011) and FBS (Project “Metodi di recupero eco-compatibili di metalli nobili da rifiuti Hi-Tech: valorizzazione e trasferimento tecnologico, 2013”) are greatly acknowledged for financing the research activity on this topic. The authors acknowledge Filippo Drago of Nanochemistry Department, IIT and Americo Rigoldi of Dipartimento di Scienze Chimiche e Geologiche, University of Cagliari, for their support in the ICP-AES analysis.

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