Steam electrolysis cell
AssigneeNippon Shokubai Co., Ltd.
InventorsKuninori Miyazaki, Masatoshi Ikeda
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Abstract
The objective of the present invention is to provide a steam electrolysis cell of which current efficiency is high and by which hydrogen can be efficiently produced, and a method for producing hydrogen using the steam electrolysis cell. The steam electrolysis cell according to the present invention is characterized in comprising an anode layer, a cathode layer, and a proton conducting oxide electrolyte layer between the anode layer and the cathode layer, wherein the anode layer comprises a perovskite oxide, and the perovskite oxide comprises Ba and Co.
Claims12
A steam electrolysis cell,
- comprising an anode layer, a cathode layer, and a proton conducting oxide electrolyte layer between the anode layer and the cathode layer,
- wherein the anode layer is formed by sintering at a temperature of 900° C. or lower and comprises a perovskite oxide having an ABO3 type structure,
- the perovskite oxide comprises Ba and Co,
- a part of the A site of the perovskite oxide is substituted by La, and
- a molar ratio of Co in the B site of the perovskite oxide is 90% or more.
A method for producing hydrogen, comprising the steps of
- supplying a water vapor-containing gas to an anode layer of a steam electrolysis cell comprising the anode layer, a cathode layer, and a proton conducting oxide electrolyte layer between the anode layer and the cathode layer, wherein the anode layer comprises a perovskite oxide having an ABO3 type structure, the perovskite oxide comprises Ba and Co, and a molar ratio of Co in the B site of the perovskite oxide is 90% or more, and
- applying voltage between the anode layer and the cathode layer,
- wherein a part of the A site of the perovskite oxide is substituted by La, and
- wherein the anode layer is formed by sintering at a temperature of 900° C. or lower.
Dependencies are inferred from the claim text.