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

• Published in: Colloids and surfaces. A, Physicochemical and engineering aspects Vol. 626; p. 127115
• Main Authors: Liu, Shihao, Guo, Xuehua, Wang, Zhanke, Hu, Zirui, Wang, Haoqiang, Zhang, Guangxu
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 05.10.2021
• Subjects: Core-shell; Denitrification; Formic acid; Kinetic calculation; Nitrogen-doped; Denitrification; Nitrogen-doped; Kinetic calculation; Core-shell; Formic acid
• ISSN: 0927-7757; 1873-4359
• DOI: 10.1016/j.colsurfa.2021.127115

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 [Display omitted] •Ag-Pd/NPCs with core-shell structure was synthesized by substitution method.•Ag-Pd/NPCs have significant catalytic activity on Fe(Ⅱ)EDTA-NO reduction by formic acid.•The surface N-doped and porous structure can improve the dispersion of nanoparticles (2 nm).•Ag as the core can greatly promote the catalytic activity of Pd as shell.