Fig. 3: Structural characterization of the unsupported and supported PdL/PdSn-NW catalysts before and after annealing in air at 400 °C.
From: Layered Pd oxide on PdSn nanowires for boosting direct H2O2 synthesis
a XRD patterns of the unsupported and supported PdL/PdSn-NW catalysts before and after annealing in air. b HRTEM image of the unsupported PdL/PdSn-NW sample showing the lattice fringes of the PdSn phase. c STEM image and STEM-EDS mapping of the supported PdL/PdSn-NW showing the close proximity of both Pd and Sn elements, indicating the successful synthesis of Pd4Sn alloy. d XPS spectra of Pd 3d core level of the supported PdL/PdSn-NW catalyst before and after annealing in air. e Surface valence band photoemission spectra of the supported PdL/PdSn-NW catalysts annealing at different temperatures in air. f HAADF-STEM image of the supported PdL/PdSn-NW catalyst after annealing showing a layer of Pd oxide on the PdSn nanowires.
