Issue 4, 2017

In situ redox deposition of palladium nanoparticles on oxygen-deficient tungsten oxide as efficient hydrogenation catalysts

Abstract

Noble metal/metal oxide support hybrid materials have attracted tremendous interest due to their wide applications in catalysis. Herein, we have developed a novel and surfactant-free method to prepare Pd/WO3−x composite materials with clean surfaces. Oxygen-vacancy-rich WO3−x nanowires (NWs) provide free electrons to reduce Pd2+, and surface-clean Pd nanoparticles (NPs) directly grow on WO3−x surfaces through an in situ redox reaction between reductive WO3−x and metal salt precursor (Na2PdCl4) in aqueous solution. The as-obtained Pd/WO3−x nanocomposites show excellent catalytic activities for the hydrogenation of 4-nitrophenol (4-NP) and styrene. The apparent rate constant for 4-NP reduction is 0.045 s−1, over the Pd/WO3−x catalyst. The turnover frequency (TOF) value for styrene hydrogenation is 1074.5 h−1, thus, exhibiting high catalytic performance. Moreover, the obtained Pd/WO3−x catalyst exhibits good stability. Oxygen vacancies in WO3−x NWs can accelerate electron transport and promote hydrogen adsorption and dissociation on the surface of the catalyst. The strong interaction between Pd NPs and WO3−x support contributes to the excellent performance. Our work provides a novel and simple strategy to directly fabricate other-noble metal NP loaded oxygen-deficient metal oxides as highly efficient catalysts for chemical transformation.

Graphical abstract: In situ redox deposition of palladium nanoparticles on oxygen-deficient tungsten oxide as efficient hydrogenation catalysts

Supplementary files

Article information

Article type
Paper
Submitted
03 Nov 2016
Accepted
15 Dec 2016
First published
12 Jan 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 2351-2357

In situ redox deposition of palladium nanoparticles on oxygen-deficient tungsten oxide as efficient hydrogenation catalysts

N. Xue, R. Yu, C. Yuan, X. Xie, Y. Jiang, H. Zhou, T. Cheang and A. Xu, RSC Adv., 2017, 7, 2351 DOI: 10.1039/C6RA26267H

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements