Synthesis-Structure-Morphology Interplay of Bimetallic "Core-Shell" Carbon Nitride Nano-electrocatalysts

An extensive morphological and structural study of two bimetallic coreshell carbon nitride nano-electrocatalysts with active sites based on Pt and Ni or on Pt and Fe is reported. The coreshell electrocatalysts are obtained by the pyrolysis of a precursor obtained by decorating a support composed of conducting particles with a hybrid inorganicorganic material. The electrocatalysts were investigated by high-resolution TEM, powder X-ray diffraction, and mu-Raman spectroscopy. The morphological and structural information presented here provides 1) insight into the microscopic features, affecting the electrochemical performance of the electrocatalyst materials determined in both ex situ measurements and single-cell configurations; and 2) an opportunity to study the effect of the different precursor chemistries on the structure and morphology of the bimetallic coreshell carbon nitride nano-electrocatalysts.