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A carbon matrix codoped with boron and nitrogen atoms was synthesized for use as an oxygen reduction reaction (ORR) catalyst in acid media. The sol–gel route developed to produce CO 2 adsorbents was modified for the synthesis of the present catalysts using boric acid, urea, activated carbon, and iron acetate precursors. The effects of doped boron and nitrogen atoms as well as iron species...
Highly stable carbon-supported hafnium oxynitride (HfO x N y -C) was synthesized by heating carbon-supported hafnium oxide, prepared using an impregnation method, under NH 3 gas in various conditions. X-ray diffraction patterns, X-ray photoelectron spectra, and field-emission transmission electron microscope images confirmed that HfO x N y nanoparticles were...
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