The adsorption of atomic nitrogen on Ni/Pt(111) surface bimetallics has been investigated as a function of the local microstructure of Ni and Pt atoms via density functional theory (DFT) calculations. Microstructures include surface and subsurface Ni atoms on Pt(111) as limiting cases, and also small clusters of Ni in the first and/or second layer of Pt. It is shown that the binding energy of N...

Lithographically fabricated iridium-based mercury microelectrode arrays are shown to be very suitable for adsorptive stripping measurements of trace nickel in the presence of the dimethylgloxime complexing agent. Variables affecting the response have been assessed and optimized. The sensor optimization has resulted in a favorable and highly stable response, with good linearity and precision (RS...

The effect of carbon monoxide (CO) co-adsorption on the dissociation of water on the Ni(111) surface has been studied using density functional theory. The structures of the adsorbed water molecule and of the transition state are changed by the presence of the CO molecule. The water O-H bond that is closest to the CO is lengthened compared to the structure in the absence of the CO, and the break...

The mechanisms governing the sulfur poisoning of the triple phase boundary (TPB) of Ni-XSZ (X2O3 stabilized zirconia) anodes have been investigated using density functional theory. The calculated sulfur adsorption energies reveal a clear correlation between the size of the cation dopant X(3+) and the sulfur tolerance of the Ni-XSZ anode; the smaller the ionic radius, the higher the sulfur toler...

Adsorbent prepared from waste plants for the treatment of dyeing effluents have high significance in environmental sustainability. In this research, adsorption of Acid Blue 92AB 92 dye from aqueous solutions on raw and modified diatomite nickel oxide nanoparticles was studied. The effect of different operation parameters such as pH, contact time, initial dye concentration, calcinations and sorb...

Thirty strains of algae were examined for their biosorption abilities for the uptake of cadmium, lead, nickel and zinc from aqueous solutions. A wide range of adsorption capacities was observed between the different strains of algae and between the four metals. The cyanophyceae Lyngbya taylorii exhibited high uptake capacities for the four metals. It was confirmed by using instrumental analysis...

Nickelocene adsorption and decomposition on the Ag(1 0 0) surface were studied with temperature programmed desorption and high resolution electron energy loss spectroscopy. At monolayer coverages on the relatively inert Ag(1 0 0) surface at 175 K, nickelocene physisorbs molecularly, with its molecular axis perpendicular to the surface plane. Nickelocene begins decomposing to adsorbed cyclopenta...

As a novel electrocatalyst for acetylene semihydrogenation, single-atom nickel dispersed N-doped carbon exhibits high conversion of 97.4%, which are attributed to weak ?-adsorption ethylene on individual Ni sites.

The interaction of formic acid with Ni( 1 lo), Ni( 1 lO)-carbide, Ni( 1 IO)-graphite, and Ni( 1 lO)sulfide surfaces was examined by molecular beam relaxation spectrometry. The apparent firstorder rate constants for the desorption of formic acid (T, < 300°K) were remarkably similar on all of the surfaces studied, suggesting that the low-temperature formic acid adsorption/desorption interactions ...

Diffuse reflectance infrared (IR) spectroscopy performed over a wide temperature range (35-298 K) is used to study the dynamics of H(2) adsorbed within the isostructural metal-organic frameworks M(2)L (M = Mg, Mn, Co, Ni and Zn; L = 2,5-dioxidobenzene-1,4-dicarboxylate) referred to as MOF-74 and CPO-27. Spectra collected at H(2) concentrations ranging from 0.1 to 3.0 H(2) per metal cation revea...