Hitachi, Ltd.

Go Kawamura

Tetsuichi Kudo

Akira Ishikawa

Hiroshi Okamoto

Tatsuo Horiba

Kohki Tamura

Seizi Takeuchi

Solid electrolyte

The present invention relates to a heteropoly acid containing carbon as a hetero atom. This heteropoly acid is useful as catalysts or starting materials for various reactions, color forming material or counter electrode material for electrochromic display element or the like.

Heteropoly acid containing carbon as hetero atom

A liquid fuel cell including an anode made of carbon powders, which contains therein an electrode catalyzer and is adapted to be supplied with a liquid fuel, a cathode supplied with oxygen, and a separator interposed between the anode and the cathode. In order to improve cell performance, the anode is formed from carbon powders bonded with a binder, the carbon powders having particle sizes passing through a 50 Tyler mesh screen, in which at least thirty percent by volume of the carbon powders are unable to pass through a 100 Tyler mesh screen.

Liquid fuel cell

Hydrogen is generated by contacting an alkaline aqueous solution of formaldehyde with at least one catalyst selected from the group consisting of molybdenum, tungsten, molybdenum carbides, tungsten carbides, molybdenum nitrides, tungstenum borides, copper, silver, gold and compounds of copper, silver and gold. Hydrogen can be generated at ambient temperature under atmospheric pressure and, therefore, complicated steps or complicated devices are unnecessary.

Process for producing hydrogen

Growing community of inventors

Tokyo, Japan

Go Kawamura