Cellulose nanocrystallites as an efficient support for nanoparticles of palladium: application for catalytic hydrogenation and Heck coupling under mild conditions
Cellulose nanocrystallites as an efficient support for nanoparticles of palladium: application for catalytic hydrogenation and Heck coupling under mild conditions
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DOI：
10.1039/c0gc00326c
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发表时间：
2011-01-01
期刊：
影响因子：
9.8
通讯作者：
Moores, Audrey
中科院分区：
文献类型：
--
作者：
Cirtiu, Ciprian M.;Dunlop-Briere, Alexandre F.;Moores, Audrey
本文报道了一种新的杂化材料PdNPs@CNCs的合成，该材料由均匀沉积在胶体纤维素纳米颗粒（CNCs）上的单分散Pd纳米颗粒（PdNPs）组成。该材料被证明是用于在室温下，在4巴的氢气下，在作为溶剂的水中，苯酚到环己酮的氢化反应的活性催化剂。此外，该催化剂在苯乙烯和碘苯的Heck偶联反应中表现良好。CNC构成高度结晶的、有序的并且还可容易地从木浆获得的绿色材料。这项工作证明了使用胶体CNCs作为催化有效载体的可能性。
We report herein the synthesis of a new hybrid material, PdNPs@CNCs consisting of monodisperse Pd nanoparticles (PdNPs) evenly deposited onto colloidal cellulose nanocrystallites (CNCs). This material proved an active catalyst for the hydrogenation reaction of phenol to cyclohexanone in water as a solvent, at room temperature, under 4 bar of dihydrogen. Moreover, the catalyst perfomed well in the Heck coupling of styrene and iodobenzene in a hydro-organic mixture. CNCs constitute a highly crystalline, ordered and yet accessible green material easily obtained from wood pulp. This work demonstrates the possibility of using colloidal CNCs as an efficient support for catalysis.