Abstract
Urchin-like RuCu nanoparticles and hollow RuCuMo nanoparticles were prepared by a one-pot chemical reduction method. The nanoparticles were characterized by EDX, HRTEM, XPS and ICP-AES. By combining cyclic voltammetry and TEM, the formation process of nanoparticles was obtained. The urchin-like RuCu nanoparticles are proved to be formed via underpotential deposition mechanism and the formation of ternary nanoparticles RuCuMo was due to the replacement of Cu with Ru and the interception of Mo gradually. It was found that the formation of different morphology is depended on the precursors in the reaction system and their reduction sequences. Compared to previously reported multi-step synthetic routes, the developed method here is much simpler.
Highlights
IntroductionUnderstanding of the formation process of NPs is necessary for the design of catalyst with targeted properties.[22] Zhu et al have reported the synthesis of PtNi nanocrystals by tracing the Ni contents in particles with transmission electron microscope (TEM) and energy dispersive X-ray (EDX) at different reaction stages.[24] Polte and his co-workers have presented the formation mechanism of gold NPs with the help of in situ small-angle X-ray scattering and X-ray absorption near-edge spectroscopy.[25] it still remains challenging to gure out the timedependent characterization of the formation process of those NPs. a facile and effective approach was introduced to synthesize urchin-like RuCu NPs and hollow RuCuMo NPs. The products were characterized by TEM, HRTEM, X-ray photoelectron spectroscopy (XPS) and ICP-AES and the formation process was monitored by measuring the cyclic voltammetric behaviors
The synthesis of multi-component metallic nanoparticles (NPs) has been a hot topic in the past decades because of their various important applications, such as optics, bioanalysis and catalysis.[1,2,3,4,5] Due to electronic and synergistic effects, multicomponent metallic NPs o en show unique catalytic activities and superior selectivity and stability to monometallic counterparts
transmission electron microscope (TEM) and HAADF-STEM images were taken to probe the morphology of the as-synthesized RuCu sample
Summary
Understanding of the formation process of NPs is necessary for the design of catalyst with targeted properties.[22] Zhu et al have reported the synthesis of PtNi nanocrystals by tracing the Ni contents in particles with TEM and EDX at different reaction stages.[24] Polte and his co-workers have presented the formation mechanism of gold NPs with the help of in situ small-angle X-ray scattering and X-ray absorption near-edge spectroscopy.[25] it still remains challenging to gure out the timedependent characterization of the formation process of those NPs. a facile and effective approach was introduced to synthesize urchin-like RuCu NPs and hollow RuCuMo NPs. The products were characterized by TEM, HRTEM, XPS and ICP-AES and the formation process was monitored by measuring the cyclic voltammetric behaviors
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