The state of zinc in methanol synthesis over a Zn/ZnO/Cu(211) model catalyst-Reference-Cited by-同舟云学术

The state of zinc in methanol synthesis over a Zn/ZnO/Cu(211) model catalyst

Published:2022-05-06 Issue:6593 Volume:376 Page:603-608
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Amann Peter¹^ORCID,Klötzer Bernhard²^ORCID,Degerman David¹^ORCID,Köpfle Norbert²^ORCID,Götsch Thomas³^ORCID,Lömker Patrick¹⁴^ORCID,Rameshan Christoph⁵^ORCID,Ploner Kevin²^ORCID,Bikaljevic Djuro²^ORCID,Wang Hsin-Yi¹^ORCID,Soldemo Markus¹^ORCID,Shipilin Mikhail¹^ORCID,Goodwin Christopher M.¹^ORCID,Gladh Jörgen¹^ORCID,Halldin Stenlid Joakim¹^ORCID,Börner Mia¹,Schlueter Christoph⁴,Nilsson Anders¹^ORCID

Affiliation:

1. Department of Physics, Stockholm University, AlbaNova University Center, 10691 Stockholm, Sweden.

2. Institute of Physical Chemistry, University of Innsbruck, Innrain 52c, 6020 Innsbruck, Austria.

3. Department of Inorganic Chemistry, Fritz Haber Institute of the Max-Planck Society, Faradayweg 4-6, 14195 Berlin, Germany.

4. Photon Science, Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.

5. Institute of Materials Chemistry, Technische Universität Wien, Getreidemarkt 9/BC/01, 1060 Vienna, Austria.

Abstract

The active chemical state of zinc (Zn) in a zinc-copper (Zn-Cu) catalyst during carbon dioxide/carbon monoxide (CO 2 /CO) hydrogenation has been debated to be Zn oxide (ZnO) nanoparticles, metallic Zn, or a Zn-Cu surface alloy. We used x-ray photoelectron spectroscopy at 180 to 500 millibar to probe the nature of Zn and reaction intermediates during CO 2 /CO hydrogenation over Zn/ZnO/Cu(211), where the temperature is sufficiently high for the reaction to rapidly turn over, thus creating an almost adsorbate-free surface. Tuning of the grazing incidence angle makes it possible to achieve either surface or bulk sensitivity. Hydrogenation of CO 2 gives preference to ZnO in the form of clusters or nanoparticles, whereas in pure CO a surface Zn-Cu alloy becomes more prominent. The results reveal a specific role of CO in the formation of the Zn-Cu surface alloy as an active phase that facilitates efficient CO 2 methanol synthesis.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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