The heats of hydrogen adsorption on porous nickel from methanol-water mixtures

The heats of hydrogen adsorption on porous nickel from methanol-water binar y solvents were measured in a wide range of coverages. The composition of t he solvent was shown to determine the character of the dependence of the he ats of hydrogen adsorption on the degree of surface coverage by the adsorba te as a result of quantitative redistribution of individual adsorbed hydrog en forms in the surface layer of the catalyst. The reasons determining the influence of the composition of aliphatic alcohol-water binary solvents on adsorption of hydrogen are discussed from the point of view of changes in t he structure and acid-base properties of the medium.