Noble metal-transition metal nanoparticle alloys display physical behaviors distinct from either their bulk or molecular counterparts and are desirable for applications ranging from heterogeneous catalysis to therapeutics. However, nanoscale alloyed architectures present new challenges for alloy synthesis because metal mixing behavior exhibits length scale dependence. Using traditional colloidal methods, we demonstrate the synthesis of a variety of noble metal-transition metal nanoparticle alloys with fully tunable compositions, often in contrast to bulk metal miscibilities. The resulting particles are characterized by transmission electron microscopy, nuclear magnetic resonance (NMR) spectroscopy, inductively coupled plasma mass spectrometry, X-ray photoelectron spectroscopy, and photoluminescence spectroscopy. In particular, we use a combination of NMR-based molecular characterization techniques and traditional materials characterization strategies to provide crucial insight into the chemical processes underpinning particle formation, as well as to directly correlate particle composition with particle physical properties.

Using nuclear magnetic resonance (NMR) techniques to study noble metal-transition metal nanoparticle alloys

254th National Meeting (2017)

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