Changes in Catalytic and Adsorptive Properties of 2 nm Pt3Mn Nanoparticles by Subsurface Atoms

• DOI: 10.1021/jacs.8b08162
• Publication Date: 2018-10-15T05:25:14Z
• Authors: Zhenwei Wu; Brandon C. Bukowski; Zhe Li; Cory Milligan; Lin Zhou; Tao Ma; Yue Wu; Yang Ren; Fabio H. Ribeiro; W. Nicholas Delgass; Jeffrey Greeley; Guanghui Zhang; Jeffrey T. Miller
• Keywords: Catalysis and Reaction Engineering; 02 engineering and technology; Chemical Engineering; 540; 0210 nano-technology; 01 natural sciences; Nanoscience and Nanotechnology; 543; 0104 chemical sciences

Supported multimetallic nanoparticles (NPs) are widely used in industrial catalytic processes, where the relation between surface structure and function is well-known. However, effect of subsurface layers on such catalysts remains mostly unstudied. Here, we demonstrate a clear supported 2 nm core–shell NPs with atomically precise high temperature stable Pt3Mn intermetallic measured by situ synchrotron X-ray Diffraction, difference Absorption Spectroscopy, Energy Dispersive Spectroscopy. The have 98% selectivity to C–H over C–C bond activation during propane dehydrogenation at 550 °C compared 82% for Pt subsurface. correlated significant reduction heats reactant adsorption due as discerned theory well experiment. findings this work highlight importance NP catalysts, which can be tuned via controlled formation. Such approach generally applicable modifying NPs, adding another dimension tunability their performance.