Abstract: There is provided an aqueous solution electrolysis method that makes it possible to reduce the amount of bubbles covering an electrode and generate gases such as hydrogen and oxygen with excellent energy efficiency. The method is an electrolysis method for electrolyzing an aqueous-solution-based electrolyte to generate at least any one of hydrogen, oxygen, and chlorine, wherein the electrolyte contains a water-soluble alcohol. For example, as the electrolyte, an alkali aqueous solution containing about 0.1 to about 10% by volume of a water-soluble alcohol including a tertiary alcohol, such as 2-methylpropan-2-ol and 2-methylbutan-2-ol, and about 1 to 10 mol/L of an alkali component may be subjected to water electrolysis, and the electrolyte is electrolyzed using, for example, an electrolytic cell having an anode chamber and a cathode chamber.

Abstract: A pump mechanism that allows a beverage dispenser to be formed compact in its width direction in spite of inclusion of a plurality of tube pumps. A first tube pump and a second tube pump are disposed on the left and right sides of a motor on more front side than this motor in such a manner that a first rotational shaft of a first rotor and a second rotational shaft of a second rotor extend perpendicularly to an output shaft. A first transmission mechanism for transmitting power outputted from the output shaft to the first rotor includes a first clutch mechanism configured to transmit rotation of the output shaft in a first direction to the first rotor, but not to transmit rotation of the output shaft in a second direction to the first rotor.