Direct production of hydrogen peroxide over bimetallic CoPd catalysts: Investigation of the effect of Co addition and calcination temperature

Author links open overlay panelHamidreza Nazeri ^a, Alireza Najafi Chermahini ^a, Zahra Mohammadbagheri ^a, Mirko Prato,  

Green Energy & Environment, 8, 2023

Abstract

A series of CoPd/KIT-6 bimetallic catalysts with various Co:Pd molar ratios at different calcination temperatures were prepared and used for the direct synthesis of H₂O₂ from H₂ and O₂. These catalysts were characterized by nitrogen adsorption–desorption, low and wide-angle X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), elemental mapping and energy-dispersive X-ray (EDX) methods. It was found that the particle size, electronic interactions, morphology, and textural properties of these catalysts as well as their catalytic activity in the reaction of H₂ with O₂ were affected by Co addition and different calcination temperatures. Also, the results showed that while the H₂O₂ selectivity depends on Pd²⁺ species, the H₂ conversion is related to Pd⁰ active sites. Among these catalysts, CoPd/KIT-6 calcined at 350 °C (CoPd/KIT-350 catalyst) showed the best catalytic activity with 50% of H₂O₂ selectivity and 51% conversion of H₂.

https://www.sciencedirect.com/science/article/pii/S2468025721000625