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Effect of Defects over the Surface of Cupper-basedCatalyst for Methanol Synthesis on the Catalytic Activities
Authors
于腊佳
廖代伟
+4 more
张鸿斌
林国栋
蔡启瑞
陈鸿博
Publication date
1 January 1998
Publisher
Abstract
用顺磁共振谱(ESr)研究外来离子含量与由这些正三价金属离子在znO表面诱导出来的正一价缺位数量之间的关系,结果表明,Al3+和SC3+对2nO表面的正一价缺位都有诱导作用,其中SC3+的掺杂对正一价缺位的诱导更有效.TPr结果显示,随着样品中SC3+含量的增加,归属于Cu2+-Ou+和Cu+-Cu0TPr谱最高峰温分别向低温和高温方向移动。在Cu-znO-M2O3(M=Al、SC)催化剂中,ESr信号强度与催化活性两者随样品中SC3+含量的增加而增加,这说明催化剂的甲醉合成催化活性与M3+掺杂后诱导出来的正一价缺住及还原态催化剂表面Cu+的稳定性之间存在着一定的关系。国家自然科学基金;福建炼油厂资助项
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Last time updated on 23/08/2016