本文選題：氧化共沉淀法 + 鈰鋯固溶體��； 參考：《石油化工》2017年07期

【摘要】：采用氧化共沉淀法制備了鈰鋯固溶體Ce_(0.67)Zr_(0.33)O_2前體。對(duì)經(jīng)不同焙燒溫度處理后的鈰鋯固溶體Ce_(0.67)Zr_(0.33)O_2試樣進(jìn)行了XRD,TG-DSC-MS,BET,XPS,Raman,H_2-TPR表征,考察了焙燒溫度對(duì)鈰鋯固溶體結(jié)構(gòu)性能、比表面積、儲(chǔ)氧量、還原性能、表面元素含量等的影響。實(shí)驗(yàn)結(jié)果表明,采用氧化共沉淀法制備的催化劑前體在550℃焙燒時(shí)可徹底去除其中的鹽類,且550℃焙燒可形成穩(wěn)定的鈰鋯固溶體,經(jīng)550~900℃焙燒的試樣具有較高的熱穩(wěn)定性;隨焙燒溫度的升高,試樣的比表面積下降,晶粒變大,氧空穴數(shù)目減少,還原能力降低;高溫下鈰鋯固溶體的部分燒結(jié),使試樣中Ce~(3+)的相對(duì)含量和儲(chǔ)氧能力降低。
[Abstract]:Cerium zirconium solid solution Ce_(0.67)Zr_(0.33)O_2 precursor was prepared by oxidation coprecipitation method.The Ce_(0.67)Zr_(0.33)O_2 samples of cerium-zirconium solid solution treated at different calcination temperatures were characterized by XRDX TG-DSC-MSBETS XPSN Ramande H2-TPR, and the effects of calcination temperature on the structure, specific surface area, oxygen storage, reduction performance and surface element content of cerium-zirconium solid solution were investigated.The results show that the precursor prepared by the oxidation co-precipitation method can completely remove the salt from the catalyst when calcined at 550 鈩，

本文編號(hào)：1763948