In this study, the hydrothermal method, the coprecipitation method, and the sol–gel method were used to control the synthesis of HAP supports. It was found that the HAP‐S carrier prepared by the sol–gel method has a unique micro‐nanostructure advantage, which is sufficient to prepare an efficient Ag/HAP‐S catalyst. Characterization techniques including XRD, N 2 adsorption–desorption, SEM, and H 2 ‐TPR revealed the structure and surface redox properties of the catalysts. The Ag/HAP‐S catalyst can effectively increase the relative contents of Ag 0 and O ads on the surface of the supports through the pore confinement effect. This makes Ag/HAP‐S have excellent catalytic performance. The toluene conversion and CO 2 selectivity can reach 100% and 87% at 270°C, respectively. In addition, the stability of the Ag/HAP‐S catalyst was tested, and the results showed that the Ag/HAP‐S catalyst exhibited good catalytic stability.
Li et al. (Thu,) studied this question.