US 11,686,698 B2
Reducing gas detection material and reducing gas detection sensor
Akira Tsuboyama, Machida (JP); and Koji Yano, Kawasaki (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Apr. 26, 2019, as Appl. No. 16/395,647.
Claims priority of application No. 2018-093370 (JP), filed on May 14, 2018; and application No. 2018-093371 (JP), filed on May 14, 2018.
Prior Publication US 2019/0346392 A1, Nov. 14, 2019
Int. Cl. G01N 27/18 (2006.01); G01N 21/78 (2006.01); G01N 33/00 (2006.01); H01M 8/04007 (2016.01); H01M 8/22 (2006.01)
CPC G01N 27/18 (2013.01) [G01N 21/783 (2013.01); G01N 33/005 (2013.01); G01N 33/0014 (2013.01); H01M 8/04074 (2013.01); H01M 8/22 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A reducing gas detection material comprising:
a palladium oxide;
a metallic palladium; and
a carbon compound,
the reducing gas detection material having reactivity with a reducing gas,
wherein when a number of palladium atoms contained in the palladium oxide is represented by PO and a number of palladium atoms contained in the metallic palladium is represented by PM, a ratio RP of the number of palladium atoms contained in the metallic palladium with respect to a total of the number of palladium atoms contained in the palladium oxide and in the metallic palladium, as represented by expression RP=PM/(PM+PO), is 0.17 to 0.45.