Publications by authors named "Haohong Song"
Article Synopsis
- Strong metal-support interactions (SMSIs) are crucial for optimizing the stability, activity, and selectivity of catalysts in chemical reactions, especially in heterogeneous catalysis.
- The Au@NiO core-shell nanostructure stands out as an innovative SMSI system, helping to stabilize the gold nanoparticles while also allowing for tunable properties through its interaction with the nickel oxide shell.
- Research shows that the electronic interaction between Au and NiO enhances the catalytic activity for oxidizing intermediates in the esterification process, revealing lower activation energy and superior performance compared to individual Au and NiO surfaces.
Article Synopsis
- Hydrogen titanates (HTOs) are layered titanium oxides with an interlayer that holds water and protons, influencing lithium insertion during electrochemical processes.
- The study employed various techniques like X-ray diffraction and mass spectroscopy to analyze how the interlayer chemistry affects the electrochemical responses of different HTOs (HTiO·HO with n = 3, 4, and 5).
- Findings suggest that the first reduction reaction relates to the acidity of structural protons, leading to hydrogen gas production and the formation of a lithiated hydrogen titanate, impacting our understanding of electrochemical behaviors in materials with hydrogen and water.
Article Synopsis
- * This study introduces a method to improve the stability of these catalysts by anchoring nickel sites within dealuminated Beta zeolite, which enhances metal-support interactions.
- * Using advanced techniques like X-ray absorption spectroscopy and isotopic experiments, the research explains how the synthesis method increases the performance and durability of the Ni catalysts by reducing unwanted byproducts.
"Single - atom" catalysts (SACs) have been the focus of intense research, due to debates about their reactivity and challenges toward determining and designing "single - atom" (SA) sites. To address the challenge, in this work, we designed Pt SACs supported on Gd-doped ceria (Pt/CGO), which showed improved activity for CO oxidation compared to its counterpart, Pt/ceria. The enhanced activity of Pt/CGO was associated with a new Pt SA site which appeared only in the Pt/CGO catalyst under CO pretreatment at elevated temperatures.
View Article and Find Full Text PDFTwo-dimensional transition metal carbides and nitrides, known as MXenes, have demonstrated remarkable performance in electrochemical energy storage and various other applications. Despite their potential, MXenes exhibit instability in aqueous solutions, and the role of defects in their aqueous stability is unclear. In this study, we report on the interfacial chemistry between water and defected TiCO MXene at room temperature using first principles molecular dynamics simulations.
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