超细CeO_2粉体的制备及其担载Pd催化剂的性能  

THE PREPARATION OF ULTRAFINE CeO_2 PARTICLES AND THE CATALYTIC PROPERTIES OF Pd-LOADED CATALYSTS FOR METHANOL DECOMPOSITION

作　　者：杨成[1] 任杰[1] 孙予罕[1] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001

出　　处：《燃料化学学报》2001年第z1期150-153,共4页Journal of Fuel Chemistry and Technology

基　　金：山西省自然科学基金 ( 9910 10 );山西省青年科学基金 ( 9910 10 )~~

摘　　要：用溶胶 -凝胶法制得了粒径为 10nm～ 15nm、均匀分散的CeO2 超细粒子粉体 ,其担载Pd催化剂比工业CeO2 颗粒为载体的催化剂具有更高的甲醇低温裂解活性。通过BET、XRD、HRTEM、TPR以及CO FTIR等表征手段对催化剂和载体的结构和性能进行研究 ,结果表明 :Pd在高比表面积的超细CeO2 载体上高度分散 ,其还原度明显增大 ,但由于产生了较强的Pd CeO2 相互作用 ,阻碍了超细CeO2 中氧物种的还原 。A kind of ultrafine CeO 2 particles with the mean size of 10?nm～15?nm was prepared by Sol Gel method, and that supported Pd catalyst showed higher activity than that on industrial CeO 2 powers for low temperature methanol decomposition The structure and properties of the catalysts and CeO 2 supports were investigated by BET, XRD, HRTEM, TPR and CO FTIR techniques The results showed that Pd was highly dispersed on ultrafine CeO 2 support with high surface areas and its reduction degree was significantly improved A strong Pd CeO 2 interaction was observed, which hindered the reduction of oxygen species in ultrafine CeO 2, while produced more activity species for methanol decomposition

关 键 词：超细CeO2 担载Pd 甲醇裂解 界面作用 

分 类 号：O643[理学—物理化学]