On the Role of Reactant Transport and (Surface) Alloy Formation for the CO Tolerance of Carbon Supported PtRu Polymer Electrolyte Fuel Cell Catalysts

Autor: Rolf Jürgen Behm, Reinhard Mörtel, H. Bönneman, Luis C. Colmenares, Hartwig Modrow, G. Köhl, Josef Hormes, Z. Jusys, J. Kaiser

Publikováno v: Fuel Cells. 6:190-202

The role of atomic scale intermixing for the electrocatalytic activity of bimetallic PtRu anode catalysts in reformate operated polymer electrolyte fuel cells (PEFC) was investigated, exploiting the specific properties of colloid based catalyst synth

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::87b3d859f4710afd55d02a32fdcf4434
https://doi.org/10.1002/fuce.200500246

In Situ Study on the Wet Chemical Synthesis of Nanoscopic Pt Colloids by 'Reductive Stabilization'

Autor: Thomas Vad, Reinhard Mörtel, Klaus Angermund, Michael Bühl, Franz Gassner, Hartwig Modrow, Richard Mynott, Eckhard Dinjus, Martin Kaupp, G. Köhl, Helmut Bönnemann, Heinz-Günter Haubold, Frank T. Mauschick, Bernd Tesche, Josef Hormes, Uwe Endruschat, N. Waldöfner

Publikováno v: The Journal of Physical Chemistry B. 107:7507-7515

The synthesis of colloidal Pt particles obtained from the reaction between platinum acetylacetonate (Pt(acac)2) and Al(CH3)3 was monitored, and the formation of the Pt colloid via “reductive stabilization” was established by a combination of tech

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::55903e1a54638c4876105572d4f79469
https://doi.org/10.1021/jp022615j

Selective oxidation of glucose on bismuth-promoted Pd-Pt/C catalysts prepared from NOct4Cl-stabilized Pd-Pt colloids

Autor: Walter Vogel, A. Schulze Tilling, Helmut Bönnemann, Bernd Tesche, T. Schilling, Klaus Seevogel, Werner Brijoux, R. Franke, G. Köhl, Josef Hormes, J. Pollmann, J. Rothe, Rainer Brinkmann

Publikováno v: Inorganica Chimica Acta. 270:95-110

Charcoal-supported Pd-Pt catalysts based on Pd-Pt/NOct4Cl colloidal alloys have superior activity and selectivity in the oxidation of glucose to gluconic acid compared with industrial heterogeneous Pd-Pt catalysts. According to transmission electron

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d9441d64a9312edca00037cf6c8e466b
https://doi.org/10.1016/s0020-1693(97)05830-1

XAS-Investigations of Colloidal Precursors for Pt/Rh Bimetallic Catalysts

Autor: G. Köhl, Josef Hormes, J. Rothe, Helmut Bönnemann, K. Siepen, Werner Brijoux

Publikováno v: Journal de Physique IV Proceedings
Journal de Physique IV Proceedings, EDP Sciences, 1997, 7 (C2), pp.C2-959-C2-960. ⟨10.1051/jp4:19972101⟩

Innovative transition metal catalysts prepared on the basis of preformed colloidal nano-particles and stabilized by surfactants are of special interest with regard to industrial applications. The physical characterization of the metal colloid precurs

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f29724a3c8b899e6a2008e1e305b46ff
https://hal.archives-ouvertes.fr/jpa-00255158

In-situ Xray Absorption Spectroscopy Investigations During the Conditioning Procedure of PtRu Colloid Catalysts

Autor: Hartwig Modrow, G. Köhl, Josef Hormes, Reinhard Mörtel, Helmut Bönnemann, Uwe Endruschat

Publikováno v: Physica Scripta. :671

We present the first in situ characterization of the conditioning process of a Vulcan supported precatalyst based on PtRu nanoparticles with either aluminumorganic or tetraalcylammonimum protection shells, obtained by x-ray absorption spectroscopic m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5467da4f6d07e534c01da7f74ef52124
https://doi.org/10.1238/physica.topical.115a00671