Boundary activated hydrogen evolution reaction on monolayer MoS.

Recently, monolayer molybdenum disulphide (MoS) has emerged as a promising and non-precious electrocatalyst for hydrogen evolution reaction. However, its performance is largely limited by the low density and poor reactivity of active sites within its basal plane. Here, we report that domain boundaries in the basal plane of monolayer MoS can greatly enhance its hydrogen evolution reaction performance by serving as active sites.

A novel two-dimensional metal-organic supramolecular framework including π-π stacking and hydrogen-bond interactions.

[μ-N,N'-Bis(pyridin-3-yl)benzene-1,4-dicarboxamide-1:2κ(2)N:N']bis{[N,N'-bis(pyridin-3-yl)benzene-1,4-dicarboxamide-κN]diiodidomercury(II)}, [Hg2I4(C18H14N4O2)3], is an S-shaped dinuclear molecule, composed of two HgI2 units and three N,N'-bis(pyridin-3-yl)benzene-1,4-dicarboxamide (L) ligands. The central L ligand is centrosymmetric and coordinated to two Hg(II) cations via two pyridine N atoms, in a syn-syn conformation. The two terminal L ligands are monodentate, with one uncoordinated pyridine N atom, and each adopts a syn-anti conformation.

Systematics and anomalies in rare earth/aluminum bromide vapor complexes: thermodynamic properties of the vapor complexes LnAl3Br12 from Ln = Sc to Ln = Lu.

Systematics and anomalies in the rare earth/aluminum bromide vapor complexes have been investigated by the phase equilibrium-quenching experiments. The measurements suggest that the LnAl3Br12 complexes are the predominant vapor complexes for the 16 rare earth elements Ln = Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu in the temperature range 601-833 K and pressure range 0.01-0.

Thermodynamics of aqueous complex solutions containing 3/1 rare earth electrolyte pairs and salting-out agents to very high concentrations.

Isopiestic osmotic coefficients have been determined for the unsaturated and NH4NO3-saturated quaternary systems H2O-NH4NO3-Y(NO3)3-Pr(NO3)3 and H2O-NH4NO3-Pr(NO3)3-Nd(NO3)3 and their subsystems H2O-NH4NO3-Y(NO3)3, H2O-NH4NO3-Pr(NO3)3, and H2O-NH4NO3-Nd(NO3)3 up to the maximum ionic strength I = 30 mol x kg(-1) at 298.15 K. As Y(NO3)3, Pr(NO3)3, and Nd(NO3)3 are 3/1 electrolytes and may form complexes (or double salts) with NH4NO3 at high concentrations, their highly unsymmetrical mixing up to NH4NO3 saturation throws light on the importance of ionic interactions and solute-solute interactions in such complicated solutions.

Thermodynamic Properties of the Rare Earth Element Vapor Complexes LnAl(3)Cl(12) from Ln = La to Ln = Lu.

Systematic analysis of rare earth element complexes has been carefully carried out in the liquid and solid states but not in the gaseous state because of the lack of a complete set of experimental data for any kind of vapor complexes of all rare earth elements. Here we present experimental quenching results which suggest that the LnAl(3)Cl(12) complexes are the predominant vapor complexes roughly in the temperature range 588-851 K and pressure range 0.01-0.