| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a gas sensor element capable of suppressing both of reduction of reactivity and output deviation, and to provide a gas sensor including the gas sensor element. <P>SOLUTION: A gas sensor element 100 includes: a detection part 10 configured by a solid electrolyte layer 3 having a pair of electrodes composed of a measured gas side electrode 41 and a reference gas side electrode 42 on both sides, a porous diffusion resistance layer 2 for surrounding the measured gas side electrode 41 through a measured gas space 8, a shielding layer 1 for defining the measured gas space 8 together with the porous diffusion resistance layer 2, a reference gas space protection layer 5 for surrounding the reference gas side electrode 42 through a reference gas space 9, and a heat generation source 6; and a catalyst supporting protection layer 20 which surrounds the detection part 10 and in which noble metal catalyst particles 22 are supported. In the catalyst supporting protection part 20, noble metal catalyst particles 22 are supported in a weight range of 0.04 mg and less, and a carbon monoxide gas adsorption amount in exhaust gas by the noble metal catalyst particles 22 is 0.02×10<SP POS="POST">-3</SP>cm<SP POS="POST">3</SP>and more. <P>COPYRIGHT: (C)2012,JPO&INPIT |
