Surface-modified ceria-zirconia mixed oxide compounds for gasoline exhaust gas applications

• Main Authors: FISCHER, JU RG, HOWARD MATTHEW, LU JING, SEAMANS KEVIN, ZHENG QINGHE, PASTREE ANDREW EDWARD
• Format: Patent
• Language: Chinese; English
• Published: 09.07.2024
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR RELEVANT APPARATUS; TRANSPORTING

Provided is a composition comprising a ceria-zirconia mixed oxide, the ceria-zirconia mixed oxide being surface-modified with a perovskite-type compound of formula (I); wherein formula (I) is defined by Ax-yA'yB1-zB 'zO3; wherein: A is an ion of a metal selected from the group consisting of Li, Na, K, Cs, Mg, Sr, Ba, Ca, Y, La, Ce, Pr, Nd and Gd; a'is an ion of a metal selected from the group consisting of Li, Na, K, Cs, Mg, Sr, Ba, Ca, Y, La, Ce, Pr, Nd and Gd; b is an ion of a metal selected from the group consisting of Cu, Mn, Mo, Co, Fe, Ni, Cr, Ti, Zr, Al, Ga, Sc, Nb, V, W, Bi, Zn, Sn, Pt, Rh, Pd, Ru, Au, Ag and Ir; b'is an ion of a metal selected from the group consisting of Cu, Mn, Mo, Co, Fe, Ni, Cr, Ti, Zr, Al, Ga, Sc, Nb, V, W, Bi, Zn, Sn, Pt, Rh, Pd, Ru, Au, Ag and Ir; x is from 0.7 to 1; y is 0 to 0.5; and z is 0 to 0.5. 提供了一种包含二氧化铈-氧化锆混合氧化物的组合物，该二氧化铈-氧化锆混合氧化物用式(I)的钙钛矿型化合物进行表面改性；其中式(I)由Ax-yA'yB1-zB'zO3定义；其中：A为选自由Li、Na、K、Cs、Mg、Sr、Ba、Ca、Y、La、Ce、Pr、Nd和Gd组成的组的金属的离子；A'为选自由Li、Na、K、Cs、Mg、Sr、Ba、Ca、Y、La、Ce