Au/Fe(OH)_3/LaFeO_3催化剂的稳定性研究  

Stability of Au/Fe(OH)_3 /LaFeO_3 Catalyst

作　　者：贾美林[1] 图雅[1] 萨嘎拉[1] 王奖[1] 徐爱菊[1] 照日格图[1] 

机构地区：[1]内蒙古师范大学内蒙古自治区绿色催化重点实验室,内蒙古呼和浩特010022

出　　处：《稀有金属材料与工程》2013年第5期967-970,共4页Rare Metal Materials and Engineering

基　　金：内蒙古自治区自然科学基金重点项目(2010zd03);新世纪优秀人才资助项目(NCET-06-0268)

摘　　要：以LaFeO3为载体,通过Fe(OH)3对载体进行改性,采用沉积沉淀法制备纳米金催化剂,并对催化剂进行XRD、XPS、AAS和BET测试,考察催化剂的活性和稳定性。结果显示,Fe(OH)3助剂的加入,对催化剂的活性提高不明显,但大大提高了催化剂在反应过程和放置过程中的稳定性。加入助剂的Au/Fe(OH)3/LaFeO3催化剂,由于Fe(OH)3和活性组分的相互作用,减缓了金颗粒的聚集,使得放置近半年的催化剂和新鲜催化剂具有相近的活性和稳定性。LaFeO3 and Fe（OH）3-modified LaFeO3 were used as supports for the nano-gold catalysts, respectively. The catalysts were prepared by a deposition- precipitation method and were characterized by XRD, XPS, AAS and BET. Furthermore, the activity and stability, involving the reaction and storage process, were investigated. The results demonstrate that the addition of Fe（OH）3 could improve the stability both in the continual reaction and the preserving process. Therefore the strong interaction between the gold species and Fe（OH）3 could inhibit the aggregation of gold particles and increase the stability of the catalyst.

关 键 词：金催化剂 一氧化碳氧化 钙钛矿氧化物 

分 类 号：O643.32[理学—物理化学]