wherein M represents a transition metal of the group V of the Periodic Table; R represents a cyclopentadienyl group, a substituted cyclopentadienyl group, an indenyl group, a substituted indenyl group, a fluorenyl group or a substituted fluorenyl group; O represents an oxygen atom; X represents...
The crystal of a nitride of a Group-13 metal on the Periodic Table of the present invention, comprises oxygen atom and hydrogen atom in the crystal and has a ratio of a hydrogen concentration to an oxygen concentration therein of from 0.5 to 4.5.三川 豊...
The Bader charge analysis indicates that the supported main group atom donates electrons to the substrate for all these systems, as listed in Supplementary Table 3. The resultant positively charged metal atoms act as Lewis acids and hence become active sites for catalytic reactions47,48,49. Fig....
where electrons form molecular orbitals centering away from the atom positions, must go through an intermediate metallic phase. In this work, we find that the intermediate metals will become a scale-invariant critical metal phase (CMP) under certain types of quenched disorder that respect ...
These metals tend to be transition elements, meaning that their electron configuration is such that the d orbital of the atom is partially filled. This is important because a partially filled d orbital means that these metals are generally more redox active, facilitating the NP formation. NPs ...
They have the formula (1): LnMXm-n, wherein each L is independently a ligand which is multidentate by adjacent cooordinating atoms, M is the central atom which is a metal selected from Groups 4-8 of the Periodic Table of the Elements (IUPAC 1990), each X is independently a unidentate...
We assume that there exists only one electron state per isolated atom with the energy E0 and that the coupling between the neighboring sites in the chain is characterized by the parameter b. Such a model was suggested and theoretically analyzed by D’amato and Pastawski [67] and then used ...
Metal-support interaction (MSI) plays a critical role in determining the catalytic performance (activity/selectivity/stability) of supported metal catalysts1,2,3. It is particularly true for single-atom catalysts (SACs) which are emerging as a new type of heterogeneous catalysts and have attracted ...
To systematically assess the roles of the carbon support in acetylene hydrochlorination, a comprehensive platform of Pt/C single-atom catalysts was synthesized, employing a broad range of amorphous carbons with varying porous properties (i.e., surface area, pore volume, pore structure) and oxygen ...
Chemical vapor deposition (CVD), one of the bottom-up methods builds up the graphene sheet atom by atom to produce large size and high-quality nanosheets.23, 24, 25 There are other methods such as epitaxial growth method,25,26 molecular beam epitaxy,26 and most recently flash graphene.27 ...