Method for improving sintering resistance of cobalt oxide catalyst by lanthanum doping

• Main Authors: TANG SHENGWEI, TANG WENXIANG, CAO YIJIA, ZHANG CHI, LYU YATING
• Format: Patent
• Language: Chinese; English
• Published: 20.09.2022
• 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

The invention particularly relates to a method for improving the sintering resistance of a cobalt oxide catalyst by lanthanum doping, and belongs to the related technical field of inorganic materials. Oxalic acid is used as a precipitator, and a mixed solution of lanthanum nitrate and cobalt nitrate is prepared into composite oxalate. And calcining to remove oxalate so as to obtain a La/CoOx fresh sample. Then, carrying out thermal aging treatment on part of the fresh sample at high temperature for a period of time to obtain a La/CoOx aging sample; by comparing the performance before and after aging, the sintering resistance of the La/CoOx catalyst is obviously improved compared with that of a pure CoOx catalyst. The cobalt oxide material is modified by simple lanthanum doping under relatively mild conditions, and the cobalt oxide material can be applied to multiple aspects such as automobile exhaust catalysis and catalytic degradation of VOCs (Volatile Organic Compounds). 本发明具体涉及利用镧掺杂提高氧化钴催化剂抗烧结性的方法，属于无机材料相关