Core-shell Ag-Pd nanoparticles catalysts for efficient NO reduction by formic acid

Abstract

The impact of nitrogen oxide on human beings has reached a point that can’t be ignored. Complex absorption is supposed to be a simple and efficient method to reduce nitrogen oxide emission. However, it is still a challenge to improve the regeneration rate of complex solution by changing the structure of catalyst. Herein, Ag-Pd nanoparticles (NPs) with core-shell structure were loaded on N-doped porous carbons (NPCs), and it was used as catalyst for Fe(Ⅱ)EDTA-NO reduction by formic acid. The results of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), temperature programmed desorption (TPD) and transmission electron microscopy (TEM) confirmed that N atoms can improve the dispersion of NPs, and core-shell structure of Ag-Pd has been successfully prepared. Due to the good core-shell structure with fine electron exchange ability and suitable particle size of Ag-Pd NPs, the prepared catalyst has superior catalytic performances, and its TOF can reach 1995 h−1. Under mild conditions, denitrification rate could reach 91.04% with 98.51% N2 selectivity for only 5 min