Direct Valorization of Recycled Palladium as Heterogeneous Catalysts for Total Oxidation of Methane

Author:

y Morales Michaël Martin Romo12,Brunet‐Manquat Anthony1,Dib Hadi2,Rousset Jean‐Luc3,Morfin Franck3,Burel Laurence3,Bourgeois Damien1ORCID,Kaper Helena2ORCID

Affiliation:

1. Laboratoire des Systèmes Hybrides pour la Séparation Institut de Chimie Séparative de Marcoule CEA CNRS ENSCM Université de Montpellier BP 17171, Marcoule 30207 Bagnols-sur-Cèze France

2. Laboratoire de Synthèses et Fonctionnalisation des Céramiques Saint-Gobain Recherche Provence/CNRS UMR 3080 550, Ave Alphonse Jauffret 84306 Cavaillon France

3. Université Claude Bernard Lyon 1 CNRS, IRCELYON 2, Ave Albert Einstein 69626 Villeurbanne France

Abstract

AbstractElectronic waste as an alternative source of palladium is used for the preparation of heterogeneous catalysts for methane oxidation. The strategy developed in this paper involves two steps: optimization of the leaching protocol to recover the Pd from the waste, and development of a suitable impregnation protocol directly from the leachate, which is a strongly acidic solution. The precipitation‐deposition technique is particularly suitable for the preparation of catalysts from acidic media. The impact of Ba, Bi, and Ag impurities on the catalytic performance is studied on model catalysts. The presence of these elements and their impact on the catalytic properties are analyzed and discussed using X‐ray diffraction, nitrogen physisorption, scanning and transmission electron microscopy. Through variation of the pH, the impurities co‐deposited with Pd can be limited and the catalytic performance of catalysts derived from real waste can be greatly enhanced.

Funder

Agence Nationale de la Recherche

Région Occitanie Pyrénées-Méditerranée

Publisher

Wiley

Subject

Inorganic Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Catalysis

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