Support stabilized PtCu single-atom alloys for propane dehydrogenation

Abstract

PtCu single-atom alloy (SAA) opens an extensive prospect for heterogeneous catalytic processes. However, as the host of SAA, Cu suffers from severe sintering at elevated temperature, resulting in poor stability...

A promoted PtFe/SiO2 catalyst with low Pt concentration for propane dehydrogenation

“…30,31 The peak appearing at 2048 cm −1 was ascribed to the unsaturated coordinated metallic Pt sites. 11,12,23,25,32 During the desorption process, strongly adsorbed CO still remained on the Pt/SiO 2 catalyst (Fig. S3 †).…”

“…9 Alloying is a common strategy for isolating Pt to avoid side reactions. Metallic elements with low electronegativity, such as Ga, [10][11][12][13] In, [14][15][16] Sn [17][18][19][20][21][22] and Cu, [23][24][25] are widely used to form alloys with Pt. Electrons can be transferred from these electronegative metals to Pt, leading to the formation of electron-rich states of Pt.…”

Oxide-Metal Interaction Probed by Scanning Tunneling Microscope Manipulation of Cr2O7 Clusters on Au(111)

“…By using in situ aberration-corrected transmission electron microscopy, Liu et al found that metal nanoparticles with smaller contact angles have stronger interfacial interactions with the substrates. 19 The difference of interfacial interaction can also be studied by various spectroscopic techniques, such as X-ray photoelectron spectroscopy (XPS), 20,21 X-ray absorption spectroscopy, 20 and in situ diffuse reflectance infrared spectroscopy. 21 Herein, we appeal to the surface-sensitive technique of scanning tunneling microscope (STM) to investigate the oxide−metal interaction.…”

“…19 The difference of interfacial interaction can also be studied by various spectroscopic techniques, such as X-ray photoelectron spectroscopy (XPS), 20,21 X-ray absorption spectroscopy, 20 and in situ diffuse reflectance infrared spectroscopy. 21 Herein, we appeal to the surface-sensitive technique of scanning tunneling microscope (STM) to investigate the oxide−metal interaction. The atomic structures and local electronic states of supported nanostructures can be obtained by STM topography and spectroscopy, respectively.…”

Promotion Effect of Well-Defined Deposited Water Layer on Carbon Monoxide Oxidation Catalyzed by Single-Atom Alloys

“…Since the concept of the single-atom alloy was first proposed, SAA catalysts have been widely used in various chemical reactions, including hydrogenation of unsaturated hydrocarbons, ,,, dehydrogenation of hydrocarbons, , hydrogenolysis of biomass molecules, , and electrochemical reduction reactions, , to name a few. These reactions on SAA catalysts are almost carried out under reducing conditions, whereas oxidation reactions are usually promoted by corresponding single atoms deposited on oxide surfaces .…”