Gas Sensor, Fuel Supply System Using the Same, and Method of Using Gas Sensor
First Claim
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1. A gas sensor comprising:
- a gas diffusion barrier that supports a catalyst that promotes a reaction between oxygen and combustible components;
a plate-shaped solid electrolyte having conductivity of oxide ion; and
paired electrodes formed on surfaces of the solid electrolyte,wherein one of the paired electrodes is located in a region into which ambient gas diffuses at a rate limited by the gas diffusion barrier and catalyzes a reaction between oxygen and combustible gas, the other paired electrode is located outside the region, the gas diffusion barrier supports a catalyst that promotes a reaction between oxygen and combustible components, andthe density of the catalyst supported on the side of the gas diffusion barrier that faces ambient gas is higher than the density of the catalyst supported on the side of the gas diffusion barrier that faces an detection chamber.
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Abstract
A gas sensor has a gas diffusion barrier that supports therein a catalyst that catalyzes a reaction between combustible components and oxygen; a solid electrolyte having oxide ion conductivity; and electrodes formed on opposite surfaces of the solid electrolyte. The electrode is formed in a region into which ambient gas diffuses at a rate limited by the gas diffusion barrier. The electrode also catalyzes the reaction between combustible gas and oxygen. The electrode is formed in a region into which atmosphere is introduced.
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Citations
11 Claims
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1. A gas sensor comprising:
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a gas diffusion barrier that supports a catalyst that promotes a reaction between oxygen and combustible components; a plate-shaped solid electrolyte having conductivity of oxide ion; and paired electrodes formed on surfaces of the solid electrolyte, wherein one of the paired electrodes is located in a region into which ambient gas diffuses at a rate limited by the gas diffusion barrier and catalyzes a reaction between oxygen and combustible gas, the other paired electrode is located outside the region, the gas diffusion barrier supports a catalyst that promotes a reaction between oxygen and combustible components, and the density of the catalyst supported on the side of the gas diffusion barrier that faces ambient gas is higher than the density of the catalyst supported on the side of the gas diffusion barrier that faces an detection chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification