Comparison of the structure and methanol electrooxidation ability from irregular PtNi nanocrystals to PtNiRu nanodendrites

Abstract

The introduction of RuCl3 in the synthesis of PtNi nanocrystals led to the formation of PtNiRu nanosphere and nanodendrite, which displayed a higher activity and durability for the methanol electrooxidation due to the porous structure and synergetic effects.

Cubic-like PtCuRu Nanocrystals with High Activity and Stability for Methanol Electro-oxidation

“…In contrast with that of the metallic Cu, the binding energy of Cu 2p 3/2 of PtCu (932.6 eV) and PtCuRu (932.5 eV) displayed a positive shift, implying that the charge transferred from Cu to Pt and resulted in the decrease of the d-band energy of Pt. , Additionally, for PtCuRu, two broad peaks with low intensity, which was possibly due to the low amount, located at 462.6 eV, were assigned to Ru 3p 3/2 , as shown in Figure S3. These peaks suggested not only the existence of metallic Pt, Cu, and Ru but also the charge transfer between Pt and Cu; also, Ru greatly modified the electronic structures of Pt in alloyed nanocrystals. , …”

“…These peaks suggested not only the existence of metallic Pt, Cu, and Ru but also the charge transfer between Pt and Cu; also, Ru greatly modified the electronic structures of Pt in alloyed nanocrystals. 29,30 In the present synthesis, the hexadecyltrimethylammonium chloride (CTAC) was suggested as a structural director that resulted in the growth of nanocrystals spatially. It was indicated that the CTAC could complex with Pt(acac) 2 and Ru(acac) 3 via van der Waals interactions and electrostatic adsorption which led to the decrease of reduction rates of the precursors.…”