The Preparation of a Residue-free, Alumina-supported Gold Catalyst by Decomposition of an Azido-Gold(III) Complex and an Evaluation of the Effectiveness of the Catalyst for the Hydrogenation of Propyne
The Preparation of a Residue-free, Alumina-supported Gold Catalyst by Decomposition of an Azido-Gold(III) Complex and an Evaluation of the Effectiveness of the Catalyst for the Hydrogenation of Propyne
复制标题
叠氮金(III)络合物分解制备无残留的氧化铝负载金催化剂及丙炔加氢催化剂的效果评价
DOI：
10.1002/zaac.201400506
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Lopez-Sanchez J
中科院分区：
文献类型：
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作者：
Lopez-Sanchez J
描述了一种1%w/w氧化铝负载的金催化剂，其通过用四叠氮金酸铵（III）NH 4 [Au（N3）4]的溶液浸渍氧化铝来制备。叠氮化物前体的分解导致由良好分散的金颗粒组成的无残留物催化剂。使用脉冲流技术测试了这种新型材料的丙炔加氢性能，并显示出对部分加氢产物丙烯的100%选择性，尽管催化剂存在大量烃保留。后一特征与支持介导的失活途径相关。与1.45% w/w Au/TiO 2参比催化剂的催化性能比较表明，不需要无氯前体化合物来增强该特定反应的催化活性。
A 1 % w/w alumina‐supported gold catalyst is described that is prepared from the impregnation of alumina with a solution of ammonium tetraazidoaurate(III), NH4[Au(N3)4]. Decomposition of the azide precursor leads to a residue‐free catalyst comprised of well‐dispersed gold particles. This novel material is tested for propyne hydrogenation using pulse‐flow techniques and displays 100 % selectivity to the partial hydrogenation product, propene, albeit in the presence of a large retention of hydrocarbon by the catalyst. The latter characteristic is associated with a support‐mediated deactivation pathway. Comparing catalytic performance with a 1.45 % w/w Au/TiO2reference catalyst indicates that chlorine‐free precursor compounds are not required to enhance catalytic activity for this particular reaction.