The negative charge is compensated by protonated methylamine cations. The CoO 6 chromophores form slightly distorted octahedra, which are bridged by C atoms of formate groups. The central Co atom lies on an inversion center and most of the other atoms lie on an m plane....
The cobalt atom in cobalamins and cobinamides can exist under the formal reduced state CoI, which is characterized by strong nucleophilic properties.293 Vitamin B12 derivatives and cobalt(II) model complexes can thus catalyze the electrochemical reduction294–296 and the reductive coupling297 of alkyl...
The development of carbon-based first-row transition metal single-atom catalysts (SACs) for the electrochemical oxygen evolution reaction (OER) has recently gained tremendous attention. However, the synthesis of SACs mainly relies on tailored precursors and, therefore, requires extensive and time-...
Developing single-site catalysts featuring maximum atom utilization efficiency is urgently desired to improve oxidation-reduction efficiency and cycling capability of lithium-oxygen batteries. Here, we report a green method to synthesize isolated cobalt
The observation implies that the turnover-limiting step is dominated by negative charge accumulation, providing valuable insights into the reaction mechanism (Fig. 5e). Fig. 5: Mechanistic studies. a Radical trapping experiments. b Deuterium-labeling experiments. c Hydromethylthiolation of the internal...
The positive charge is predominantly localized on the N(Py) atom.I. D. KosenkoA. N. Nesmeyanov Institute of Organoelement CompoundsI. A. LobanovaA. N. Nesmeyanov Institute of Organoelement CompoundsZ. A. StarikovaA. N. Nesmeyanov Institute of Organoelement CompoundsV. I. Bregadze...
Further, coordination number of cobalt as a first neighboring atom around tin obtained by the radial structure function calculated based on one scattering theory of X-ray absorption spectroscopy is 4 or less. 展开 收藏 引用 批量引用 报错 分享 ...
The electronic structure of cobalt silicide clusters Co 7Si 7 and Si 7Co 7 was studied in comparison to that of Co 19 and Si 17 clusters under the scope of the MINDO/SR method. Clusters Co 7Si 7 and Si 7Co 7 represent the environment of a cobalt atom and that of a silicon atom ...
charge redistribution between Pt and O atoms in Pt-O-Pt units, making Pt atoms the main active sites and O linkers the assistants, thus optimizing the proton adsorption and hydrogen desorption. This work opens an avenue to fabricate noble-metal-based ACs stabilized by single-atom catalysts with...
(C239N1Ru3Co52), in which the metal atom ratio is comparable to experimental materials measured by ICP. The optimized adsorption structures are shown inFig. 6, which exhibited the C atom next to the doping N atom in graphene shell is the active adsorption site for H*, which is also ...