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Arne Wittstock
Researcher at University of Bremen
Publications - 65
Citations - 4280
Arne Wittstock is an academic researcher from University of Bremen. The author has contributed to research in topics: Nanoporous & Catalysis. The author has an hindex of 25, co-authored 62 publications receiving 3796 citations. Previous affiliations of Arne Wittstock include Lawrence Livermore National Laboratory.
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Nanoporous Gold Catalysts for Selective Gas-Phase Oxidative Coupling of Methanol at Low Temperature
TL;DR: Nanoporous Au, prepared by the dealloying of AuAg alloys, is a new catalyst with a stable structure that is active without any support that catalyzes the selective oxidative coupling of methanol to methyl formate with selectivities above 97% and high turnover frequencies at temperatures below 80°C.
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Surface-chemistry-driven actuation in nanoporous gold
Jürgen Biener,Arne Wittstock,Arne Wittstock,Luis A. Zepeda-Ruiz,Monika M. Biener,Volkmar Zielasek,Denis Kramer,R. N. Viswanath,Jörg Weissmüller,Marcus Bäumer,A. V. Hamza +10 more
TL;DR: This work demonstrates that surface-chemistry-driven actuation can be realized in high-surface-area materials such as nanoporous gold, and achieves reversible strain amplitudes of the order of a few tenths of a per cent by alternating exposure of nanoporous Au to ozone and carbon monoxide.
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Nanoporous gold: a new material for catalytic and sensor applications
TL;DR: This work deals with the actuation of np-Au by the reversible oxidation of its surface using ozone and the adsorbate controlled coarsening of ligaments, using annealing experiments under ozone or inert gas atmosphere.
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Ultralow loading Pt nanocatalysts prepared by atomic layer deposition on carbon aerogels.
Jeffrey S. King,Arne Wittstock,Juergen Biener,Sergei O. Kucheyev,Yinmin M. Wang,Theodore F. Baumann,Sandeep K. Giri,Alex V. Hamza,Marcus Baeumer,Stacey F. Bent +9 more
TL;DR: Using atomic layer deposition (ALD), it is shown that Pt nanoparticles can be deposited on the inner surfaces of carbon aerogels (CA), and the resultant Pt-loaded materials exhibit high catalytic activity for the oxidation of CO even at loading levels as low as approximately 0.05 mg Pt/cm2.
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Nanoporous Au: An Unsupported Pure Gold Catalyst?
Arne Wittstock,Björn Neumann,Andreas Schaefer,Karifala Dumbuya,Christian Kübel,Monika M. Biener,Volkmar Zielasek,Hans-Peter Steinrück,J. Michael Gottfried,Jiirgen Biener,Alex V. Hamza,Marcus Bäumer +11 more
TL;DR: In this paper, the reaction kinetics for low temperature CO oxidation in detail, taking the mass transport limitation due to the porous structure of the material into account, were investigated with respect to its morphology, surface composition, and catalytic properties.