Triphenylphosphine as Efficient Antidote for the Sulfur‐Poisoning of the Pd/C Hydrogenation Catalyst,ChemCatChem

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Triphenylphosphine as Efficient Antidote for the Sulfur‐Poisoning of the Pd/C Hydrogenation Catalyst
ChemCatChem ( IF 3.8 ) Pub Date : 2020-10-13 , DOI: 10.1002/cctc.202001537
Renjie Xiong ₁ , Wenqiang Ren ₁ , Zhiqiang Wang ₂ , Minghui Zhang ₁

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Pd/C catalyst is a widely applied hydrogenation catalyst in organic synthesis for the reduction of many organic compounds. It has been reported that it suffers from sulfur poisoning. Herein we report that catalytic amounts of triphenylphosphine (TPP), which is also an usual poison to Pd/C, could greatly improve the catalytic performance of Pd/C in sulfur‐containing systems. The sulfur‐poisoned Pd/C catalyst can be activated when adding TPP. The characterizations show that TPP partly reduced the deactivated layer of palladium sulfide formed during the reaction at higher temperature, and expose the high active sites of metallic Pd to keep the hydrogenation process. TPP may promote the hydrogenation of nitro compounds and olefins in the presence of sulfur compounds, proving to be an efficient antidote for Pd/C hydrogenation catalyst poisoning.

中文翻译：

三苯膦是Pd / C加氢催化剂硫中毒的有效解毒剂

Pd / C催化剂是有机合成中广泛使用的用于还原许多有机化合物的加氢催化剂。据报道，它患有硫中毒。本文报道了催化量的三苯膦（TPP），它也是Pd / C的常见毒物，可以大大提高Pd / C在含硫体系中的催化性能。添加TPP时，可以活化硫中毒的Pd / C催化剂。表征表明，TPP部分还原了在较高温度下反应过程中形成的硫化钯的失活层，并暴露了金属Pd的高活性位点，以保持氢化过程。TPP可以在硫化合物存在下促进硝基化合物和烯烃的氢化，被证明是Pd / C加氢催化剂中毒的有效解毒剂。

更新日期：2020-10-13

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