guest ::
| Home > Publications database > The state of zinc in methanol synthesis over a Zn/ZnO/Cu(211) model catalyst |
| Home > Publications database > The state of zinc in methanol synthesis over a Zn/ZnO/Cu(211) model catalyst |
| Journal Article | PUBDB-2022-03204 |
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
2022
Moses King
Cambridge, Mass.
This record in other databases: 
Please use a persistent id in citations: doi:10.1126/science.abj7747
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.
; BIOSIS Previews ; Biological Abstracts ; Chemical Reactions ; Clarivate Analytics Master Journal List ; Current Contents - Agriculture, Biology and Environmental Sciences ; Current Contents - Life Sciences ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 40 ; Index Chemicus ; JCR ; National-Konsortium ; Nationallizenz
; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection ; Zoological Record
|
The record appears in these collections: |
PDF
PDF (PDFA)