Nature and Reactivity of Oxygen Species on/in Silver Catalysts during Ethylene Oxidation
Nature and Reactivity of Oxygen Species on/in Silver Catalysts during Ethylene Oxidation
复制标题
乙烯氧化过程中银催化剂上/内部氧的性质和反应性
DOI:
10.1021/acscatal.1c05939
复制
发表时间:
2022
期刊:
影响因子:
12.9
通讯作者:
Wachs, Israel E.
中科院分区:
文献类型:
--
作者:
Pu, Tiancheng;Setiawan, Adhika;Mosevitzky Lis, Bar;Zhu, Minghui;Ford, Michael E.;Rangarajan, Srinivas;Wachs, Israel E.
The nature of surface oxygen species on/in a silver powder catalyst and their reactivity with ethylene were systematically investigated with multiple spectroscopies and DFT calculations. Unique quasiin situHS-LEIS,in situNAP-XPS, andin situRaman spectroscopy demonstrated that the silver surface is covered by a thin oxide layer (1–3 nm) after an oxidation treatment and during ethylene oxidation. Periodic DFT models allowed assignments of oxygen species detected byin situRaman spectroscopy with detailed structures on p(4 × 4)–O–Ag(111) surfaces.In situNAP-XPS and Raman spectroscopy suggest that Ag4–O2on oxidized Ag is the active oxygen species for ethylene epoxidation. The experimental and theoretical methodologies developed in the present work serve as an efficient toolbox for the scientific investigation of the silver–oxygen system for selective oxidation reactions and rational guidance of computational calculations coupled with experimental findings.
DOI:
--
发表时间:
2021
期刊:
影响因子:
--
作者:
K. Isegawa;K. Ueda;K. Amemiya;K. Mase;H. Kondoh
通讯作者:
H. Kondoh
DOI:
--
发表时间:
1981
期刊:
影响因子:
--
作者:
I. Pockrand;A. Otto
通讯作者:
A. Otto