Constraining reaction pathways for methanol oxidation through operando interrogation of both the surface and the near-surface gas phase
Constraining reaction pathways for methanol oxidation through operando interrogation of both the surface and the near-surface gas phase
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通过表面和近表面气相的操作询问来限制甲醇氧化的反应途径
DOI:
10.1016/j.checat.2023.100782
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Kronawitter, Coleman X.
中科院分区:
文献类型:
--
作者:
Gurses, Sadi M.;Felvey, Noah;Filardi, Leah R.;Zhang, Angie J.;Wood, Joseph;van Benthem, Klaus;Frank, Jonathan H.;Osborn, David L.;Hansen, Nils;Kronawitter, Coleman X.
We combine near-surface molecular beam mass spectrometry—a probe of the gas phase within hundreds of micrometers of catalyst surfaces—and surface-sensitive infrared spectroscopy to study methanol oxidation at atmospheric pressure with the use of MgO-supported PdOx. The study of adsorbate and near-surface gas-phase compositions under reaction conditions suggests that the fate of surface-generated CH2O—its desorption, its spillover, and its reaction with surface oxygenates—is central to C2product generation. However, the reactivity of CH2O prevents its observation on surfaces. The key support for the mechanistic claim originates from observations of gas-phase methoxymethanol, which is too reactive for detection by traditional techniques: this molecule contains the dioxymethylene group, implicating a methylene-containing intermediate in the initial coupling event. This work shows that probes of the near-surface region yield information complementary to that obtained through surface-sensitive spectroscopy. Their combined use is an underexplored, yet powerful, strategy for developing and constraining reaction pathways for catalysis.
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DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
J. Sambeth;A. Juan;L. Gambaro;H. Thomas
通讯作者:
H. Thomas
DOI:
10.1039/c7cp07743b
发表时间:
2018-04
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
作者:
L. Ruwe;K. Moshammer;N. Hansen;K. Kohse-Höinghaus
通讯作者:
L. Ruwe;K. Moshammer;N. Hansen;K. Kohse-Höinghaus
DOI:
10.1021/acs.jpclett.1c03381
发表时间:
2021-11
期刊:
The journal of physical chemistry letters
影响因子:
--
作者:
Sadi M Gurses;Trevor Price;Angie J. Zhang;J. Frank;N. Hansen;D. Osborn;A. Kulkarni;C. Kronawitter
通讯作者:
Sadi M Gurses;Trevor Price;Angie J. Zhang;J. Frank;N. Hansen;D. Osborn;A. Kulkarni;C. Kronawitter
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
S. Abbet;A. Ferrari;L. Giordano;G. Pacchioni;H. Häkkinen;U. Landman;U. Heiz
通讯作者:
U. Heiz
DOI:
--
发表时间:
1991
期刊:
影响因子:
--
作者:
M. Bensitel;O. Saur;J. Lavalley
通讯作者:
J. Lavalley