Catalytic Membrane Nanoreactor with Cu–Agx Bimetallic Nanoparticles Immobilized in Membrane Pores for Enhanced Catalytic Performance

• DOI: 10.1021/acsami.1c22753
• Publication Date: 2022-02-10T21:15:16Z
• Authors: Yu Chen; Senqin Fan; Jiaojiao Chen; Lei Deng; Zeyi Xiao
• Keywords: Nanoreactor; Bimetallic strip; Hydrogen spillover

A catalytic membrane nanoreactor (CMNR) with Cu-Agx (where x is the millimolar concentration of AgNO3) bimetallic catalysts immobilized in pores has been fabricated via coupling flowing synthesis and replacement reaction. Surface characterization by transmission electron microscopy (TEM) gives obvious evidence formation Cu-Ag core-shell nanostructures Ag islands deposited on Cu core metal. An apparent high shift phenomenon for element a low was determined X-ray photoelectron spectroscopy (XPS), indicating close interaction transfer density from atom to atom. The hydrogenation catalysis p-nitrophenol (p-NP) tested evaluate performance. During process, acts as an electron-deficient site adsorb activate -NO2 group p-NP, shell beneficial enhancing active H spilling surface then performing hydrogenation. volcano-shaped reaction rate constant can be achieved, which rises initially increasing content subsequently drops further increase content. highest value 1071 min-1 achieved CMNR Cu-Ag2 owing suitable adsorption activation behavior best hydrogen spillover behavior.