Patent ID: 7189364
Filing Date: 2007-03-13
Classification: G01N,H01M,Y02E,Y10T

Abstract:
1. A hydrogen sensor comprising: a proton conduction layer; a first electrode and a second electrode provided in contact with the proton conduction layer; a gas diffusion controlling portion provided between a measurement gas containing hydrogen and the first electrode; and a support element for supporting the proton conduction layer, the first electrode, the second electrode, and the gas diffusion controlling portion; means for controlling hydrogen concentration on the first electrode to a partial pressure of not less than 3×10 voltage control means for controlling the voltage applied across the first and second electrodes to not be greater than 425 mV, wherein hydrogen introduced via the gas diffusion controlling portion is dissociated, decomposed or reacted by applying a voltage between the first electrode and the second electrode to thereby generate protons, said protons being pumped via the proton conduction layer from a first electrode side of the proton conduction layer to a second electrode side of the proton conduction layer to generate a limiting current, and the hydrogen concentration of the measurement gas is determined based on said limiting current.