Long Li
University of Pittsburgh
34 Papers
356 Citations
Long Li is an academic researcher from University of Pittsburgh. The author has contributed to research in topics: Oxide & Catalysis. The author has an hindex of 14, co-authored 34 publications. Previous affiliations of Long Li include Center for Functional Nanomaterials & University of Central Florida.
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Papers
Shape-dependent catalytic properties of Pt nanoparticles.
S. Mostafa,Farzad Behafarid,Jason R. Croy,Luis K. Ono,Long Li,Judith C. Yang,Anatoly I. Frenkel,Beatriz Roldan Cuenya +7 more
TL;DR: A correlation between the number of undercoordinated atoms at the nanoparticle surface and the onset temperature for 2-propanol oxidation was observed, demonstrating that catalytic properties can be controlled through shape-selective synthesis.
Solving the Structure of Size-Selected Pt Nanocatalysts Synthesized by Inverse Micelle Encapsulation
Beatriz Roldan Cuenya,Jason R. Croy,S. Mostafa,Farzad Behafarid,Long Li,Zhongfan Zhang,Judith C. Yang,Qi Wang,Anatoly I. Frenkel +8 more
TL;DR: It is shown that this synthesis method leads to 3D NP shapes even for subnanometer clusters, in contrast to the raft-like structures obtained for the same systems via traditional deposition-precipitation methods.
Noncrystalline-to-Crystalline Transformations in Pt Nanoparticles
Long Li,Lin-Lin Wang,Duane D. Johnson,Duane D. Johnson,Zhongfan Zhang,Sergio I. Sanchez,Joo H. Kang,Ralph G. Nuzzo,Qi Wang,Anatoly I. Frenkel,Jie Li,James Ciston,James Ciston,Eric A. Stach,Judith C. Yang +14 more
TL;DR: It is shown that the noncrystalline-to-Crystalline transition of supported Pt nanoparticles (NPs) in the subnanometer to nanometer size range is statistical in nature, and strongly affected by particle size, support, and adsorbates.
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Thermodynamic properties of Pt nanoparticles: Size, shape, support, and adsorbate effects
B. Roldan Cuenya,M. Alcantara Ortigoza,Luis K. Ono,Farzad Behafarid,S. Mostafa,Jason R. Croy,Kristof Paredis,Ghazal Shafai,Talat S. Rahman,Long Li,Zhongfan Zhang,Judith C. Yang +11 more
TL;DR: In this paper, a combination of in situ extended x-ray absorption fine-structure spectroscopy (EXAFS), ex situ transmission electron microscopy (TEM) measurements, and NP shape modeling revealed a cross over from positive to negative thermal expansion with decreasing particle size, size and shape-dependent changes in the mean square bond-projected bond-length fluctuations, and enhanced Debye temperatures with a bimodal size-dependence for NPs in the size range of ∼0.8-5.4 nm.
Correlating Catalytic Methanol Oxidation with the Structure and Oxidation State of Size-Selected Pt Nanoparticles
Lindsay R. Merte,Mahdi Ahmadi,Farzad Behafarid,Luis K. Ono,Estephania Lira,Jeronimo Matos,Long Li,Judith C. Yang,Beatriz Roldan Cuenya +8 more
TL;DR: In this article, the structure and chemical state of size-selected platinum nanoparticles (NPs) prepared by micelle encapsulation and supported on γ-Al2O3 during the oxidation of methanol under oxygen-rich reaction conditions following both oxidative and reductive pretreatments.