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Zeitschriftenartikel:

K. Ploner, L. Schlicker, A. Gili, A. Gurlo, A. Doran, L. Zhang, M. Armbrüster, D. Obendorf, J. Bernardi, B. Klötzer, S. Penner:
"Reactive metal-support interaction in the Cu-In2O3 system: intermetallic compound formation and its consequences for CO2-selective methanol steam reforming";
Science and Technology of Advanced Materials, 20 (2019), 1; S. 356 - 366.



Kurzfassung englisch:
The reactive metal-support interaction in the Cu-In2O3 system and its implications on the CO2
selectivity in methanol steam reforming (MSR) have been assessed using nanosized Cu particles
on a powdered cubic In2O3 support. Reduction in hydrogen at 300 °C resulted in the formation
of metallic Cu particles on In2O3. This system already represents a highly CO2-selective MSR
catalyst with ~93% selectivity, but only 56% methanol conversion and a maximum H2 formation
rate of 1.3 μmol gCu
−1 s−1. After reduction at 400 °C, the system enters an In2O3-supported
intermetallic compound state with Cu2In as the majority phase. Cu2In exhibits markedly
different self-activating properties at equally pronounced CO2 selectivities between 92% and
94%. A methanol conversion improvement from roughly 64% to 84% accompanied by an
increase in the maximum hydrogen formation rate from 1.8 to 3.8 μmol gCu
−1 s−1 has been
observed from the first to the fourth consecutive runs. The presented results directly show the
prospective properties of a new class of Cu-based intermetallic materials, beneficially combining
the MSR properties of the catalyst´s constituents Cu and In2O3. In essence, the results also
open up the pathway to in-depth development of potentially CO2-selective bulk intermetallic
Cu-In compounds with well-defined stoichiometry in MSR.

Schlagworte:
Copper; cubic indium oxide; in situ X-ray diffraction; Cu2In; reduction


"Offizielle" elektronische Version der Publikation (entsprechend ihrem Digital Object Identifier - DOI)
http://dx.doi.org/10.1080/14686996.2019.1590127


Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.