公开(公告)号：US20240359164A1

公开(公告)日：2024-10-31

申请号：US18770265

申请日：2024-07-11

申请人： GRIREM HI-TECH CO., LTD. ,  Rare Earth Functional Materials (Xiong 'an) Innovation Center Co., Ltd. ,  GRIREM ADVANCED MATERIALS CO., LTD.

发明人： Zheng ZHAO ,  Xiaowei HUANG ,  Yongqi ZHANG ,  Yongke HOU ,  Zongyu FENG ,  Weixin ZHAO ,  Yang XU

IPC分类号： B01J23/656 ,  B01J35/57 ,  B01J37/02 ,  B01J37/08 ,  B01J37/12

CPC分类号： B01J23/6562 ,  B01J35/57 ,  B01J37/0215 ,  B01J37/08 ,  B01J37/12

摘要： Disclosed are a grain boundary and surface-loaded noble metal catalyst, a preparation method and an application thereof. The noble metal is dispersed at the grain boundary and surface of alumina and/or a rare earth manganese-zirconium composite oxide to form a multiphase interface, which achieves the following beneficial technical effects: firstly, the multiphase interface has a larger steric hindrance and a stronger anchoring effect, which can inhibit the migration, agglomeration, and growth of the noble metal at high temperatures, increase the high-temperature stability and catalytic performance of the noble metal, and reduce the usage of the noble metal; secondly, the multiphase interface exhibits a synergistic catalytic effect, which can reduce the activation energy of lattice oxygen and increase the quantity of active oxygen, thereby enhancing the NO oxidation and low-temperature catalytic activity.