摘要
采用XRD、TPD－MS和TPR技术研究了ZrO2的改性对CuO／γ－Al2O3催化剂上铜物种分散状态、表面氧物种的脱附和恢复性能、铜物种还原和再氧化行为的影响，并以CO氧化反应为探针考察了催化剂的氧化活性结果表明，ZrO2的存在使钢物种在γ-Al2O3载体上的分散客量降低，促进CuO／γ－Al2O3催化剂上表面氧物种的脱附，同时有效地促进银物种的还原，从而增加CO的氧化活性．
The effects of ZrO2 modification of γ-Al2O3 on the desorption-renewal properties of surface oxygen species and the reduction behavior of copper species on CuO/γ-Al2O3 were studied by TPD-MS and TPR methods, and its activity for CO oxidation was examined. The results indicated that the presence of ZrO2 could promote the desorption of surface oxygen species and the reduction of copper species on CuO/γ-Al2O3 and thus increasing the activity for CO oxidation. In addition, it was found that the desorptibility of oxygen species and the reducibility of copper species on γ-Al2O3 or ZrO2-Al2O3 were affected by variation in the conditions of thermal treatment.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1997年第2期128-133,共6页
Acta Physico-Chimica Sinica
基金
浙江省教委基金
关键词
催化剂
氧化锆
铜
氧化铝
氧
脱附
催化性能
ZrO_2, CuO/γ-Al_2O_3, CO oxidation, Surface oxygen species
