Jump to main content
Jump to site search

Issue 3, 2016
Previous Article Next Article

Direct synthesis of hydrogen peroxide from hydrogen and oxygen over activated-carbon-supported Pd–Ag alloy catalysts

Author affiliations

Abstract

A series of bimetallic PdAg catalysts on an activated carbon support were prepared and assessed for the direct synthesis of hydrogen peroxide from hydrogen and oxygen. The ensemble effect and electronic effect between Pd and Ag were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction (TPR), and temperature-programmed desorption of H2/O2 (H2-/O2-TPD), etc. Our results showed that the Ag additive increased the monomeric Pd sites which were the primary active sites for H2O2 formation. In addition, the content of Pd2+ was increased via the electronic interaction between Pd and Ag, which prevented the decomposition and hydrogenation of H2O2 to some extent. Therefore, the selectivity of this reaction was increased using bimetallic PdAg catalysts, as compared with the monometallic Pd catalyst. The optimal PdAg-40 catalyst achieved a H2O2 productivity of 7022 mol kgPd−1 h−1 and a high selectivity of 70.9%, which were superior to those of the Pd/C catalyst.

Graphical abstract: Direct synthesis of hydrogen peroxide from hydrogen and oxygen over activated-carbon-supported Pd–Ag alloy catalysts

Back to tab navigation

Article information


Submitted
03 Jun 2015
Accepted
26 Aug 2015
First published
28 Aug 2015

Catal. Sci. Technol., 2016,6, 809-817
Article type
Paper
Author version available

Direct synthesis of hydrogen peroxide from hydrogen and oxygen over activated-carbon-supported Pd–Ag alloy catalysts

J. Gu, S. Wang, Z. He, Y. Han and J. Zhang, Catal. Sci. Technol., 2016, 6, 809
DOI: 10.1039/C5CY00813A

Social activity

Search articles by author

Spotlight

Advertisements