摘要
载体在 4个预定温度下进行了预处理 ,用湿式浸渍法制备了氧化铝担载铂系催化剂。应用TPR,H2 - TPD,XRD等方法对制备的催化剂进行了表征 ,结果表明随着预处理温度的升高 (室温～85 0℃ ) ,贵金属铂系催化剂分散度提高 ,活性中心数目增加。
The alumina supported platium catalysts were prepared by wet impregnation mathod; the support was pretreated at four diffent temperatures. The TPR, H_2.TPD,XRD techniques were used for characterizing the influence of support pretreatments on the supported platinum catalysts. With the rizing of the pretreatment temperature(from room temperature to 850℃), the dispersion of noble.metal platinum in the catalysts was enchanced and the amount of active sites was augmented. [KH-2]
出处
《合成化学》
CAS
CSCD
2000年第5期428-430,共3页
Chinese Journal of Synthetic Chemistry
基金
国家自然科学基金!资助项目 (No.2 990 30 1 1 )
关键词
铂催化剂
载体
处理条件
还原性质
表征
Platinum catalyst, Support, Pretreatment, Reducibility, Characterization.
