Single-Atom Gold Catalysis in the Context of Developments in Parahydrogen-Induced Polarization

被引：70

作者：

Corma, Avelino ^{[3
]}

Salnikov, Oleg G. ^{[1
,2
]}

Barskiy, Danila A. ^{[1
,2
]}

Kovtunov, Kirill V. ^{[1
,2
]}

Koptyug, Igor V. ^{[1
,2
]}

机构：

[1] Int Tomog Ctr SB RAS, Lab Magnet Resonance Microimaging, Novosibirsk 630090, Russia

[2] Novosibirsk State Univ, Novosibirsk 630090, Russia

[3] Inst Tecnol Quim UPV CSIC, Valencia 46022, Spain

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2015年 / 21卷 / 19期

基金：

俄罗斯科学基金会;

关键词：

gold; heterogeneous catalysis; hydrogenation; NMR spectroscopy; signal enhancement; HETEROGENEOUS HYDROGENATION; HYPERPOLARIZED GAS; ACTIVE-SITES; CLUSTERS;

D O I：

10.1002/chem.201406664

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A highly isolated monoatomic gold catalyst, with single gold atoms dispersed on multiwalled carbon nanotubes (MWCNTs), has been synthesized, characterized, and tested in heterogeneous hydrogenation of 1,3-butadiene and 1-butyne with parahydrogen to maximize the polarization level and the contribution of the pairwise hydrogen addition route. The Au/MWCNTs catalyst was found to be active and efficient in pairwise hydrogen addition and the estimated contributions from the pairwise hydrogen addition route are at least an order of magnitude higher than those for supported metal nanoparticle catalysts. Therefore, the use of the highly isolated monoatomic catalysts is very promising for production of hyperpolarized fluids that can be used for the significant enhancement of NMR signals. A mechanism of 1,3-butadiene hydrogenation with parahydrogen over the highly isolated monoatomic Au/MWCNTs catalyst is also proposed.

引用

页码：7012 / 7015

页数：4

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