fig1

Figure 1. (A) Route for the preparation of LaQS, Pt₂/LaO_V-r and Pt₂/LaQS; (B and C) XRD patterns and N₂ adsorption isotherms of LaQS, LaO_V-r, Pt₂/LaQS and Pt₂/LaO_V-r; (D) TEM images of LaQS; (E) Lattice fringes and crystalline surfaces of Pt in Pt₂/LaO_V-r; (F and G) TEM particle images and grain sizes of Pt₂/LaO_V-r; (H and I) TEM particle images and grain sizes of Pt₂/LaQS; (J) HR-TEM image and EDS elemental mapping of Pt₂/LaO_V-r. XRD: X-ray diffraction; TEM: transmission electron microscopy; HR-TEM: high-resolution TEM; EDS: energy dispersive X-ray spectroscopy.