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Title: Reactive metal-support interaction in the Cu-In2O3 system: intermetallic compound formation and its consequences for CO2-selective methanol steam reforming

Abstract

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.

Authors:
 [1];  [2];  [2];  [2];  [3];  [4];  [4];  [5];  [6];  [1];  [1]
+ Show Author Affiliations
  1. Univ. of Innsbruck, Innsbruck (United States). Dept. of Physical Chemistry
  2. Inst. of Materials Science and Technology, Berlin (Germany)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  4. Chemnitz Univ. of Technology, Chemnitz (Germany)
  5. Univ. of Innsbruck, Innsbruck (Austria)
  6. Univ. Service Center for Transmission Electron Microscopy, Vienna (Austria)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
OSTI Identifier:
1571950
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Science and Technology of Advanced Materials
Additional Journal Information:
Journal Volume: 20; Journal Issue: 1; Journal ID: ISSN 1468-6996
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Copper; cubic indium oxide; in situ X-ray diffraction; Cu2In; reduction

Citation Formats

Ploner, Kevin, Schlicker, Lukas, Gili, Albert, Gurlo, Aleksander, Doran, Andrew, Zhang, Lei, Armbrüster, Marc, Obendorf, Dagmar, Bernardi, Johannes, Klötzer, Bernhard, and Penner, Simon. Reactive metal-support interaction in the Cu-In2O3 system: intermetallic compound formation and its consequences for CO2-selective methanol steam reforming. United States: N. p., 2019. Web. doi:10.1080/14686996.2019.1590127.
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Ploner, Kevin, Schlicker, Lukas, Gili, Albert, Gurlo, Aleksander, Doran, Andrew, Zhang, Lei, Armbrüster, Marc, Obendorf, Dagmar, Bernardi, Johannes, Klötzer, Bernhard, & Penner, Simon. Reactive metal-support interaction in the Cu-In2O3 system: intermetallic compound formation and its consequences for CO2-selective methanol steam reforming. United States. https://doi.org/10.1080/14686996.2019.1590127
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Ploner, Kevin, Schlicker, Lukas, Gili, Albert, Gurlo, Aleksander, Doran, Andrew, Zhang, Lei, Armbrüster, Marc, Obendorf, Dagmar, Bernardi, Johannes, Klötzer, Bernhard, and Penner, Simon. Thu . "Reactive metal-support interaction in the Cu-In2O3 system: intermetallic compound formation and its consequences for CO2-selective methanol steam reforming". United States. https://doi.org/10.1080/14686996.2019.1590127. https://www.osti.gov/servlets/purl/1571950.
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@article{osti_1571950,
title = {Reactive metal-support interaction in the Cu-In2O3 system: intermetallic compound formation and its consequences for CO2-selective methanol steam reforming},
author = {Ploner, Kevin and Schlicker, Lukas and Gili, Albert and Gurlo, Aleksander and Doran, Andrew and Zhang, Lei and Armbrüster, Marc and Obendorf, Dagmar and Bernardi, Johannes and Klötzer, Bernhard and Penner, Simon},
abstractNote = {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.},
doi = {10.1080/14686996.2019.1590127},
journal = {Science and Technology of Advanced Materials},
number = 1,
volume = 20,
place = {United States},
year = {Thu Apr 25 00:00:00 EDT 2019},
month = {Thu Apr 25 00:00:00 EDT 2019}
}
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https://doi.org/10.1080/14686996.2019.1590127
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    journal, November 2019

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