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Intermetallic GaPd$_{2}$ Thin Films for Selective Hydrogenation of Acetylene

Zimmermann, R.; Siebert, M.; Ibrahimkutty, S.; Dittmeyer, R.; Armbrüster, M.

Abstract:
The preparation of single‐phase and catalytically active GaPd2 coatings was accomplished via DC magnetron sputtering using an intermetallic sputter target. Thin and uniform layers were deposited on borosilicate glass, Si(111) and planar as well as micro‐structured stainless steel foils. The specimens were examined regarding their phase composition, film morphology and microstructure. Thin films of different layer thickness were catalytically characterized in the semi‐hydrogenation of acetylene, which was conducted at 473 K and a feed gas composition of 0.5 vol.% C2H2, 5 vol.% H2 as well as 50 vol.% C2H4 in helium. Pre‐reduction of the catalyst was found to be essential to enhance the catalytic selectivity. Sputtered GaPd2 showed a high selectivity of 73 % for the hydrogenation to ethylene at conversion levels above 80 %. The surface‐specific activity was strongly increased to 8.97 molacetylene· (A 0· h)–1 compared to bulk‐ or nanoscale GaPd2 (1.93 and 0.30 molacetylene· (A 0· h)–1, respectively) caused by the high specific surface area of the thin films.

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Verlagsausgabe §
DOI: 10.5445/IR/1000120180
Veröffentlicht am 16.06.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -technologie (IKFT)
Institut für Mikroverfahrenstechnik (IMVT)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 31.07.2020
Sprache Englisch
Identifikator ISSN: 0044-2313, 0372-7874, 0863-1778, 0863-1786, 1521-3749
KITopen-ID: 1000120180
HGF-Programm 37.03.01 (POF III, LK 01) Catalysts and Mechanisms
Erschienen in Zeitschrift für anorganische und allgemeine Chemie
Verlag Wiley
Band 646
Heft 14
Seiten 1218-1226
Vorab online veröffentlicht am 04.06.2020
Nachgewiesen in Web of Science
Dimensions
Scopus
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