Article In: scopus, orcid, cienciavitae

Partial oxidation of methane over bimetallic nickel-lanthanide oxides

JOURNAL OF ALLOYS AND COMPOUNDS

Ferreira, Ana C.; Ferraria, A. M.; Branco, Joaquim B. — 2010

Key information

Authors:

Ferreira, Ana C. (Ana Cristina Gomes Ferreira da Silva Parreira); Ferraria, A. M. (Ana Maria da Conceição Ferraria); Botelho do Rego, A. M. (Ana Maria Pereira Lopes Redondo Botelho do Rego); Goncalves, Antonio P. (António Cândido Lampreia Pereira Gonçalves); Correia, M. Rosario; Gasche, T. Almeida; Branco, Joaquim B. (Joaquim Miguel Badalo Branco)

Published in

01/07/2010

Abstract

The study of partial oxidation of methane (POM) over bimetallic nickel-lanthanide oxides was undertaken. Binary intermetallic compounds of the type LnNi (Ln = Pr, Gd, Lu) were used as bimetallic nickel-lanthanide oxides precursors and the products (NiO center dot Pr(2)NiO(4), 2NiO center dot Gd(2)O(3) and 2NiO center dot Lu(2)O(3)) were characterized by means of X-ray diffraction, X-ray photoelectron spectroscopy, Raman and temperature programmed reduction. The catalytic activity increases when gadolinium or lutetium replaces praseodymium and the selectivity of the bimetallic nickel-lanthanide oxides is clearly different from that of single metal oxides and/or mechanical mixtures. The existence of an unusual synergism effect between the two metal oxide phases (NiO and Ln(2)O(3)) that lead to higher conversions of methane and higher selectivities to hydrogen and carbon monoxide correlate also the catalysts stability to deactivation. The activity and selectivity of the gadolinium and lutetium compounds is, under the same conditions, equivalent to that of a platinum commercial catalyst, 5wt\% Pt/Al(2)O(3), which stresses the good catalytic performance of this new type of compounds for the production of H(2) and CO (H(2)/CO = 2). (C) 2009 Elsevier B.V. All rights reserved.

Publication details

Authors in the community:

Publication version

AO - Author's Original

Title of the publication container

JOURNAL OF ALLOYS AND COMPOUNDS

First page or article number

316

Last page

323

Volume

489

Issue

1

DOI

10.1016/j.jallcom.2009.09.082

WoS (Web of Science)

WOS:000273204100062

Fields of Science and Technology (FOS)

chemical-sciences - Chemical sciences

Publication language (ISO code)

eng - English

Alternative identifier (URI)

http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000273204100062&KeyUID=WOS:000273204100062

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