Abstract
The synthesis of ultrasmall supported bimetallic nanoparticles (between 1 and 3 nanometers in diameter) with well-defined stoichiometry and intimacy between constituent metals remains a substantial challenge. We synthesized 10 different supported bimetallic nanoparticles via surface inorganometallic chemistry by decomposing and reducing surface-adsorbed heterometallic double complex salts, which are readily obtained upon sequential adsorption of target cations and anions on a silica substrate. For example, adsorption of tetraamminepalladium(II) [Pd(NH3)4 2+] followed by adsorption of tetrachloroplatinate [PtCl4 2−] was used to form palladium-platinum (Pd-Pt) nanoparticles. These supported bimetallic nanoparticles show enhanced catalytic performance in acetylene selective hydrogenation, which clearly demonstrates a synergistic effect between constituent metals.
| Original language | English |
|---|---|
| Pages (from-to) | 560-564 |
| Number of pages | 5 |
| Journal | Science |
| Volume | 362 |
| Issue number | 6414 |
| DOIs | |
| State | Published - Nov 2 2018 |
Funding
We thank J. Spivey for the access to the IR instrument and K. Dooley for the assistance in thermogravimetric and nitrogen sorption analysis. T. Blanchard is acknowledged for inductively coupled plasma analysis. K.D. acknowledges the startup funding from Louisiana State University. Electron microscopy and UV-vis spectroscopy were conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility. XPS was performed at the Shared Instrumentation Facility (SIF) at Louisiana State University. The Ketek seven-element detector array used in this study for x-ray measurements at CAMD was acquired with funds provided by The Louisiana Board of Regents [LEQSF(2016-17)-ENH-TR-07].