Proton Mobility in Water in Glass Pores of 15 µm Diameter

Long-range structuring of water by quartz and glass surfaces as indicated by the infrared continuum and diffusion coefficient of the excess proton

“…Limiting Diffusion Coefficient of the Hydrogen Ion in Water from the Rotating Disk and Glass Diaphragm Methods. The values obtained for the tracer diffusion coefficients of the hydrogen ion from the rotating disk electrode and from the glass diaphragm cell (pore size [5][6][7][8][9][10][11][12][13][14][15] µ ) also suggest that the lowering of the continuum of 1 M HCl in porous quartz is due to a structuring of the water molecules adjacent to the quartz surface.…”

“…7 The limiting value Z)H+°(Figure 5) is 8.13 X 10"5 cm2 s"1 compared with 9.31 X 10"5 cm2 s"1 for the Nernst value and that obtained by extrapolating the results for the rotating disk electrode, i.e., a depression of -~13%. If the average pore size is 10 µ for sintered glass, pore range [5][6][7][8][9][10][11][12][13][14][15] µ , and if one assumes rectangular pores (cylindrical pores give the same results), a 13% depression means that the effective cross-sectional area, A, of the pores is reduced from (10 X 10) X 10"12 m2 to 87 X 10"12 m2 or that the edge of the rectangular pore is reduced in width from 10 to 9.33 µ, which is equivalent to a minimum of 0.34 µ per surface.…”

Proton diffusion and activity in the presence of electrolytes

“…It is well established that proton and deuteron diffusion1 in normal and heavy water solutions of electrolytes is very sensitive to the presence of electrolytes, Figure la and lb. [2][3][4][5][6][7] The aim of this paper is to consider critically the present theories of proton diffusion in water and to ascertain the mechanism in the presence of electrolytes. Our recent work on proton diffusion and activity in the presence of electrolytes is briefly summarized and the interpretation is considerably extended in the light of recent infrared investigations of acid solutions containing electrolytes.…”