In:
Nanoscale Advances, Royal Society of Chemistry (RSC), Vol. 5, No. 19 ( 2023), p. 5385-5389
Abstract:
In this study, gold nanoparticles were dispersed on Co 3 O 4 nanoplates, forming a specific Au–Co 3 O 4 interface. Upon calcination at 300 °C in air, aberration-corrected STEM images evidenced that the gold nanoclusters (NCs) on Co 3 O 4 {111} were maintained at ca. 2.2 nm, which is similar to the size of the parent Au colloidal particles, demonstrating the stronger metal-support interaction (SMSI) on Co 3 O 4 {111}. Au/Co 3 O 4 {111} showed good catalytic activity (a full CO conversion achieved at 80 °C) and durability (over 10 hours) in CO oxidation, which was mainly due to the promotion by the surface oxygen vacancies and intrinsic defects of Co 3 O 4 {111} for activating O 2 and by Au 0 , Au δ + , and Au + species on the surface of gold NCs for CO activation, as evidenced by Raman and Fourier-transform infrared (FT-IR) spectroscopy analysis. Au/Co 3 O 4 catalyzed CO oxidation obeyed the Langmuir–Hinshelwood mechanism at low temperatures.
Type of Medium:
Online Resource
ISSN:
2516-0230
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2942874-9
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