Electrocatalytic reduction of PhCH2Br on Ag-Y zeolite modified electrode
首发时间:2013-09-04
Abstract:In order to improve the catalytic efficiency toward electroreduction of organic halides, Ag-exchanged Y zeolite (Ag-Y) has been prepared and modified on glass carbon (GC) electrodes. Ag-Y zeolite was characterized by XRD, BET, ICP, SEM, TEM and XPS. Silver species, in state of Ag+, has been successfully exchanged into Y zeolite. The Ag-Y zeolite modified electrode was used for the PhCH2Br reduction. Similar electrochemical behavior, besides more positive reduction potential, was obtained on Ag-Y/GC electrode as that on Ag and GC electrodes. According to the bulk electrolysis, the electrochemical dimerization and carboxylation yields on Ag-Y/GC electrode were enhanced to twice and triple as that on Ag electrode, and even 3.5 and 10 times as that on GC electrode.
keywords: Zeolite-modified electrode electrocatalytic reduction Ag-Y PhCH2Br
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Ag-Y分子筛修饰电极上PhCH2Br的电催化还原研究
摘要:针对有机卤代物的电催化还原,设计制备了Ag负载的Y型分子筛,并将其修饰于玻碳电极上。制备的Ag-Y分子筛通过XRD, BET, ICP, SEM, TEM和XPS等进行表征,证实Ag+已成功地交换负载至Y型分子筛内。Ag-Y分子筛修饰的玻碳电极上得到的溴苯的电还原行为与GC电极和Ag电极上的类似,但还原电位要更正,说明其有意的电催化性能。整体电极结果表明:Ag-Y分子筛修饰电极上溴苄的电还原偶联和电还原羧化反应的产率分别是Ag电极上的2倍和3倍,而且与GC电极的相比分别提到了3.5和10倍。
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