Structurally Disordered Pd−P Nanoparticles as Effective Catalysts for the Production of Hydrogen Peroxide by the Anthraquinone Method
Л. Б. Белых, N. I. Skripov, T. P. Sterenchuk, V. V. Akimov, В. Л. Таусон, E. A. Milenkaya, Fedor K. Schmidt
Abstract
Abstract The properties of the catalyst based on structurally disordered Pd−P nanoparticles supported on a carbon support (Pd−P/C) in the preparation of hydrogen peroxide by the anthraquinone method have been studied. It is shown that a high yield of H 2 O 2 is observed upon sequential hydrogenation of 2000 mol of eAQ (mol Pd) −1 . The H 2 O 2 yield reaches 96 %–97 %. Pd−P nanoparticles are more active in the hydrogenation of 2‐ethyl‐9,10‐anthraquinone than Pd 6 P crystalline phosphide. In terms of H 2 O 2 yield, Pd−P/C catalysts are superior to known catalysts: Pd/C, Pd/Al 2 O 3 . Based on the data of X‐ray powder diffraction, X‐ray photoelectron spectroscopy, Inductively Coupled Plasma and thermogravimetry, the main reasons for the deactivation of Pd−P/C catalysts have been established. Crystallization of the structurally disordered Pd−P nanoparticles, poisoning by eAQ conversion products and leaching of the active component are considered to be possible reasons of the Pd−P/C catalyst deactivation.