Synthesis of layered double hydroxide-supported platinum nanocatalyst for highly efficient and selective hydrogenation of nitroaromatics

In this work, highly dispersed platinum nanoclusters (or single atoms) supported on layered double hydroxides (Pt/FeNi-LDHs, Pt/FeCo-LDHs, Pt/CoNi-LDHs) are synthesized. The as-prepared catalysts are used for the selective hydrogenation of nitroaromatics, the catalysts showed high activity, selectiv...
Ausführliche Beschreibung

In this work, highly dispersed platinum nanoclusters (or single atoms) supported on layered double hydroxides (Pt/FeNi-LDHs, Pt/FeCo-LDHs, Pt/CoNi-LDHs) are synthesized. The as-prepared catalysts are used for the selective hydrogenation of nitroaromatics, the catalysts showed high activity, selectivity and stability. The as-synthesized catalysts are characterized by thermal-gravity (TG), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), high resolution TEM (HRTEM), scanning TEM (STEM), STEM-EDS elemental analysis and inductively coupled plasma emission spectroscopy (ICP-OES) methods, which prove that the Pt species are highly dispersed on the support. Take p-nitroacetophenone reduction as an example, the 0.4%Pt/FeNi-LDHs catalyst also shows excellent catalytic performance (conversion = 98.2%, turnover frequency (TOF) = 1100.5 h−1) and high selectivity to p-aminoacetophenone (93.8%) among these as-prepared catalysts even at low temperature (60 °C). Its excellent performance is probably due to the uniform distribution of the platinum species and the interaction of Pt–FeNi-LDHs conducive to the selective hydrogenation of –NO2 groups. Ausführliche Beschreibung