Proceedings of the 1986 International Congress on Renewable Energy Sources. Electrochemical hydrogen production by means of advanced alkaline water electrolysis. International Congress on Renewable Energy Sources [18-23 Mayo 1986, Madrid].

Consejo Superior de Investigaciones Científicas.
Terol, S., ed. Divisek, J.

1987

1113
V.1
CIENA

84-00-6673-1

Different components of an advanced alkaline water electrolytic cell have been developed. Of particular importance were the method of inexpensive, effective catalytic electrode coating, new suitable diaphragm materials and solution pf basis engineering problems by the construction of the sandwich zero-gap electrolytic cell. Technically easily producible and inexpensive Raney nickel electrodes were developed. They are fabricated by means of the galvanic deposition of a Ni/Zn alloy which is subsequently activated to Raney nickel by hot alkali treatment. Both, anodes and cathodes, can be produced in this way. The catalyst has high catalytic activity, excellent mechanical strength and long time stability. A new ceramic diaphragm on the NiO-basis has been developed. This fine porous, Ni-screen supported diaphragm has good mechanical properties, very low electrical surface resistance, good mechanical properties, very low electrical surface resistance, good separation capability for the product gases oxygen and hydrogen, excelent corrosion stability in hot KOH and its manufacturing procedure is very simple. The diaphragm is not hydrophobic and therefore allows very well the zero-gap electrolyser construction. The long-time stability of the cell voltage was established. Relevant engineering problems considering the sandwich electrolyzer construction are explained. The most important economic aspects of the future electrochemical hydrogen production are discussed. INTRODUCTION. GENERAL ASPECTS OF WATER ELECTROLYSIS. DIAHRAGMS. ELECTRODES. SET-UP OF THE CELL. ECONOMICAL AND TECHNOLOGICAL COMPARISON AND OUTLOOK. REFERENCES.

Presenta gráfs.

GENERAL; ENERGIA DEL HIDROGENO; HIDROGENO; ELECTROQUIMICA; PRODUCCION; ASPECTOS ECONOMICOS;