Nitrogen Photofixation over IIIâ Nitride Nanowires Assisted by Ruthenium Clusters of Low Atomicity

In many heterogeneous catalysts, the interaction of supported metal species with a matrix can alter the electronic and morphological properties of the metal and manipulate its catalytic properties. IIIâ nitride semiconductors have a unique ability to stabilize ultraâ small ruthenium (Ru) clusters (ca. 0.8â nm) at a high loading density up to 5â wtâ %. nâ Type IIIâ nitride nanowires decorated with Ru subâ nanoclusters offer controlled surface charge properties and exhibit superior UVâ and visibleâ light photocatalytic activity for ammonia synthesis at ambient temperature. A metal/semiconductor interfacial Schottky junction with a 0.94â eV barrier height can greatly facilitate photogenerated electron transfer from IIIâ nitrides to Ru, rendering Ru an electron sink that promotes Nâ ¡N bond cleavage, and thereby achieving lowâ temperature ammonia synthesis.IIIâ Nitridâ Halbleiter stabilisieren Rutheniumcluster mit Beladungsdichten bis 5â Gew.â %. Der Schottkyâ à bergang an der Grenzfläche zwischen Metall und Halbleiter begünstigt den Transfer von Photoelektronen aus den IIIâ Nitriden auf das Ruthenium, das dadurch die Spaltung der Nâ ¡Nâ Bindung in einer Niedertemperatursynthese von Ammoniak bewirken kann.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/137688/1/ange201703301_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/137688/2/ange201703301-sup-0001-misc_information.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/137688/3/ange201703301.pd

Enhanced Orbital Degeneracy in Momentum Space for LaOFeAs

The Fermi surfaces (FS) of LaOFeAs (in $k_z$=0 plane) consist of two hole-type circles around $\Gamma$ point, which do not touch each other, and two electron-type co-centered ellipses around M point, which are degenerate along the M-X line. By first-principles calculations, here we show that additional degeneracy exists for the two electron-type FS, and the crucial role of F-doping and pressure is to enhance this orbital degeneracy. It is suggested that the inter-orbital fluctuation is the key point to understand the unconventional superconductivity in these materials.Comment: 4 pages, 5 figure

Glucitol-core containing gallotannins-enriched red maple (Acer rubrum) leaves extract alleviated obesity via modulating short-chain fatty acid production in high-fat diet-fed mice

Glucitol-core containing gallotannins (GCGs) are characteristic constituents of the red maple (Acer rubrum) species. To pursue the development of red maple for nutraceutical applications, GCGs-enriched red maple leaves extract (MLE) was evaluated for its effects on obesity, gut dysbiosis and short chain fatty acids (SCFAs) production. Our results demonstrated that MLE alleviated high-fat diet-induced obesity, reduced body weight gain and fat mass, improved liver steatosis and insulin resistance, and mitigated adipose hypertrophy and inflammation. Additionally, MLE increased total SCFAs, acetic acid and n-butyric acid content, but exerted no impact on propionic acid production. Moreover, MLE modulated gut microbiota community structure and certain bacteria relative abundance, including Prevotella and Eubacterium. Our work firstly reports a potential association between colon-derived SCFAs production and metabolic improvement due to GCGs-enriched red maple leaves extract administration, and highlights the utilization of red maple gallotannins as a dietary ingredient for preventing obesity and related metabolic diseases