Bimetallic nanoalloys: polymer-assisted preparation and catalytic properties.

Transkript

1 Bimetallic nanoalloys: polymer-assisted preparation and catalytic properties. Dissertation zur Erlangung des Doktorgrades der Naturwissenschaften Dr. rer. nat. Vorgelegt dem Promotionsausschuss des Fachbereichs 2 (Chemie/Biologie) der Universität Bremen von Willian Gonçalves Menezes Bremen, im Februar 2013

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3 Erstgutachter: Prof. Dr. Marcus Bäumer (Universität Bremen) Zweitgutachter: Prof. Dr. Andreas Hartwig (IFAM - Bremen)

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5 Selbstständigkeitserklärung Hiermit erkläre ich, dass ich die vorliegende Arbeit selbständig angefertigt und keine außer den angegebenen Hilfsmitteln verwendet habe. Diese Arbeit wurde nicht vorher an anderer Stelle eingereicht. Bremen, den (Willian G. Menezes)

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7 Bedanken möchte ich mich bei

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9 This thesis is based on the following papers, which will be referred to in the text by their roman numerals: (I) Synthesis of stable AuAg bimetallic nanoparticles encapsulated by diblock copolymer micelles W. G. Menezes, V. Zielasek, G. I. Dzhardimalieva, S. I. Svetlana Pomogailo, K. Thiel, D. Wöhrle, A. Hartwig, and M. Bäumer Nanoscale, 2012, Volume: 4 Issue: 5 Pages: (II) Bimetallic Co-Pd catalysts: study of preparation methods and their influence on the selective hydrogenation of acetylene W. G. Menezes, L. Altmann, V. Zielasek, K. Thiel, M. Bäumer Journal of Catalysis, 2013, Volume: 300 Issue: 4 Pages: (III) Effects of particle size, composition and support on catalytic activity of AuAg nanoparticles prepared in reverse block-copolymer micelles as nanoreactors W. G. Menezes, V. Zielasek, K. Thiel, A. Hartwig, M. Bäumer Journal of Catalysis, 2013, Volume: 299 Issue: 3 Pages: (IV) Bimetallic AuAg nanoparticles: Enhancing the catalytic activity of Au for reductios in liquid phase by addition of Ag W. G. Menezes, B. Neumann, V. Zielasek, K. Thiel, M. Bäumer ChemPhysChem, 2013, in press. DOI: /cphc

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11 Statement regarding my contribution to the published work: All stated publications are unexceptionally based on the collaboration of several researches. Nevertheless, for publication (I) I was responsible for writing the manuscript, the preparation of samples, and for the complete characterization of samples. Regarding publication (II) I was strongly involved in writing the manuscript, performed the experimental work and was only to a minor extend involved in the catalytic characterization of samples (Lena Altmann was the coworker responsible and strongly involved in that experiments). For publication (III) I was responsible for writing the manuscript and performed the experimental work, structural characterization as well as for the catalytic tests with the samples. For publication (IV) I was responsible for writing the manuscript, the preparation of samples, and for the catalytic characterization of samples.

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13 Zusammenfassung

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15 Abstract

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61 *Au 3+ /Ag + denotes micelles loaded with the metal salts (unreduced) and 1:1 denotes Au:Ag atomic ratio.

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79 Curriculum Vitae

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89 Bimetallic AuAg nanoparticles: enhancing the catalytic activity of Au for reduction reactions in liquid phase by addition of Ag

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