The failure of transpassive films on transition metal alloys was investigated. results show that the film 3D printing nickel-based superalloy in flowing NaNO 3 solution is dominated by self-induced cracking niobium-segregated phases and erosion-induced degradation assisted cation vacancy condensation at metal/barrier layer interface. Secondary passivation induces formation a film, nature which ...

We observed the bare W2(+) metal cation upon electron ionization of the weakly bound W(CO)6 dimer. This metal cation can be only observed due to the fast conversion of the weak cluster bond into a strong covalent bond between the metal moieties.

Cation diffusion facilitators (CDF) are highly conserved, metal ion efflux transporters that maintain divalent transition metal cation homeostasis. Most CDF proteins contain two domains, the cation transporting transmembrane domain and the regulatory cytoplasmic C-terminal domain (CTD). MamM is a magnetosome-associated CDF protein essential for the biomineralization of magnetic iron-oxide parti...

Two-dimensional (2D) transition metal dichalcogenides (TMDs) have been widely used from nanodevices to energy harvesting/storage because of their tunable physical and chemical properties. In this work, we systematically investigate the effects of hydrogenation on the structural, electronic, magnetic, and catalytic properties of 33 TMDs based on first-principles calculations. We find that the st...

Alloying in 2D results in the development of new, diverse, and versatile systems with prospects in bandgap engineering, catalysis, and energy storage. Tailoring structural phase transitions using alloying is a novel idea with implications in designing all 2D device architecture as the structural phases in 2D materials such as transition metal dichalcogenides are correlated with electronic phase...

Rationally designed oxygen evolution reaction (OER) catalysts with structural and compositional superiorities are essential for energy-related electrocatalytic techniques. Transition-metal phosphides have been used as promising electrocatalysts OER. Incorporating heteroatoms into the lattice can induce distortion redistribution of electron density, consequently modifying electronic structure im...

Abstract Heteronuclear calcium–iron carbonyl cation complexes in the form of [CaFe(CO) n ] + ( =5–12) are produced gas phase. Infrared photodissociation spectroscopy conjunction with quantum chemical calculations confirm that =10 complex is coordination saturated ion where a Fe(CO) 4 fragment bonded Ca(CO) 6 through two side‐on bridging ligands. Bonding analysis indicates it best described by b...

the removal of copper (ii), zinc (ii), and chromium (iii) from wastewater by carrot residues(cr) was investigated to evaluate cation exchange capacity. the effects of solution ph and co- ions werestudied in batch experiments. adsorption equilibria were initially rapidly established, and then decreasedmarkedly after 10 min. column experiments were carried out in a glass column filled with cr toe...

a proton nmr method for the drtermination of salvation numbers of alkaline earth cations with hexamethyl phosphoramide (hmpa) in nitromethane (nm) as diluents is described. the method is based on monitoring the resonance frequency of hmpa protons as a function of hmpa / metal ion molar ratio at constant metalion concentration. the average salvation number of cations,  , at any hmpa / metal ion ...

Many materials processes are thermally activated, and a full understanding of the microscopic details often requires characterization on the nanoscale. In situ heating in the TEM is a powerful technique for observing temperature effects on the atomic scale. We use in situ TEM to study octahedral rotations, which play a key role in the strain-driven coupling of order parameters in multifunctiona...