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000398556 1001_ $$0P:(DE-H253)PIP1024283$$aTofighi, Ghazal$$b0
000398556 245__ $$aMicrofluidic Synthesis of Ultrasmall AuPd Nanoparticles with a Homogeneously Mixed Alloy Structure in Fast Continuous Flow for Catalytic Applications
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000398556 520__ $$aUltrasmall Au, Pd and AuPd nanoparticles (NPs) stabilized by PVP were prepared in a microfluidic reactor with cyclone micromixers for rapid mixing of reactants. In this system, pulsation-free flow of reactants was achieved at a total flow rate of 2.6 L h-1. A rapid homogeneous mixing within 2 ms was obtained with three cyclone micromixers. Controlled NP nucleation and growth occur in a following meandering microchannel. The resulting colloidal NPs were characterized thoroughly by various complementary techniques e.g. high resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDX) and Ultraviolet-visible spectroscopy. The average NP diameter was about 1 nm with a narrow size distribution and electron microscopy showed homogeneously alloyed NPs. Moreover, the particles were supported on TiO2. for catalytic tests and further structural characterization. Electron microscopy showed a uniform distribution of NPs on the support with some aggregation. X-ray absorption spectroscopy (XAS) confirmed the formation of well-mixed AuPd alloys in NP cores with Pd-rich surfaces. Finally, 1 wt.% metal loaded supports showed catalytic activities in CO oxidation in the following order: Au/TiO2. ≥ AuxPdy/TiO2. ≥ Pd/TiO2. Hence, the physical and chemical properties of these catalysts can be fine-tuned.
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000398556 7001_ $$aGaur, Abhijeet$$b1
000398556 7001_ $$0P:(DE-H253)PIP1017208$$aDoronkin, Dmitry$$b2
000398556 7001_ $$0P:(DE-H253)PIP1016146$$aLichtenberg, Henning$$b3
000398556 7001_ $$aWang, Wu$$b4
000398556 7001_ $$aWang, Di$$b5
000398556 7001_ $$aRinke, Guenter$$b6
000398556 7001_ $$aEwinger, Angela$$b7
000398556 7001_ $$aDittmeyer, Roland$$b8
000398556 7001_ $$0P:(DE-H253)PIP1008522$$aGrunwaldt, Jan-Dierk$$b9$$eCorresponding author
000398556 773__ $$0PERI:(DE-600)2256522-X$$a10.1021/acs.jpcc.7b11383$$gp. acs.jpcc.7b11383$$p-$$tThe @journal of physical chemistry <Washington, DC> / C$$v-$$x1932-7455$$y2017
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