Platinum-Modulated Cobalt Nanocatalysts for Low-Temperature Aqueous-Phase Fischer Tropsch Synthesis

Journal Article · Tue Jan 01 04:00:00 EST 2013 · Journal of the American Chemical Society

DOI:https://doi.org/10.1021/ja400771a· OSTI ID:1074444

Wang, Hang ^[1]; Zhou, Wu ^[2]; Liu, JinXun ^[3]; Si, Rui ^[4]; Sun, Geng ^[1]; Zhong, Mengqi ^[1]; Su, Haiyan ^[1]; Zhao, Huabo ^[1]; Rodrigues, Jose ^[4]; Pennycook, Stephen J ^[2]; Idrobo Tapia, Juan C ^[2]; Li, Weixue ^[3]; Kou, Yuan ^[1]; Ma, Ding ^[1]

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1. Peking University
2. ORNL
3. Dalian Institute of Chemical Physics
4. Brookhaven National Laboratory (BNL)

Fischer Tropsch synthesis (FTS) is an important catalytic process for liquid fuel generation, which converts coal/shale gas/biomass-derived syngas (a mixture of CO and H2) to oil. While FTS is thermodynamically favored at low temperature, it is desirable to develop a new catalytic system that could allow working at a relatively low reaction temperature. In this article, we present a one-step hydrogenation reduction route for the synthesis of Pt Co nanoparticles (NPs) which were found to be excellent catalysts for aqueous-phase FTS at 433 K. Coupling with atomic-resolution scanning transmission electron microscopy (STEM) and theoretical calculations, the outstanding activity is rationalized by the formation of Co overlayer structures on Pt NPs or Pt Co alloy NPs. The improved energetics and kinetics from the change of the transition states imposed by the lattice mismatch between the two metals are concluded to be the key factors responsible for the dramatically improved FTS performance.

• Research Organization: Oak Ridge National Laboratory (ORNL); Shared Research Equipment Collaborative Research Center
• Sponsoring Organization: ORNL LDRD Director's R&D
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1074444
• Journal Information: Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 10 Vol. 135; ISSN 0002-7863
• Country of Publication: United States
• Language: English