The Experts below are selected from a list of 35037 Experts worldwide ranked by ideXlab platform
Ruqian Wu - One of the best experts on this subject based on the ideXlab platform.
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revealing surface elemental composition and dynamic processes involved in facet dependent oxidation of pt3co nanoparticles via in situ transmission electron microscopy
Nano Letters, 2017Co-Authors: Masatoshi Onoue, G.w. Graham, Shuyi Zhang, Ruqian WuAbstract:Since catalytic performance of Platinum–Metal (Pt–M) nanoparticles is primarily determined by the chemical and structural configurations of the outermost atomic layers, detailed knowledge of the distribution of Pt and M surface atoms is crucial for the design of Pt–M electrocatalysts with optimum activity. Further, an understanding of how the surface composition and structure of electrocatalysts may be controlled by external means is useful for their efficient production. Here, we report our study of surface composition and the dynamics involved in facet-dependent oxidation of equilibrium-shaped Pt3Co nanoparticles in an initially disordered state via in situ transmission electron microscopy and density functional calculations. In brief, using our advanced in situ gas cell technique, evolution of the surface of the Pt3Co nanoparticles was monitored at the atomic scale during their exposure to an oxygen atmosphere at elevated temperature, and it was found that Co segregation and oxidation take place on {11...
Masatoshi Onoue - One of the best experts on this subject based on the ideXlab platform.
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revealing surface elemental composition and dynamic processes involved in facet dependent oxidation of pt3co nanoparticles via in situ transmission electron microscopy
Nano Letters, 2017Co-Authors: Masatoshi Onoue, G.w. Graham, Shuyi Zhang, Ruqian WuAbstract:Since catalytic performance of Platinum–Metal (Pt–M) nanoparticles is primarily determined by the chemical and structural configurations of the outermost atomic layers, detailed knowledge of the distribution of Pt and M surface atoms is crucial for the design of Pt–M electrocatalysts with optimum activity. Further, an understanding of how the surface composition and structure of electrocatalysts may be controlled by external means is useful for their efficient production. Here, we report our study of surface composition and the dynamics involved in facet-dependent oxidation of equilibrium-shaped Pt3Co nanoparticles in an initially disordered state via in situ transmission electron microscopy and density functional calculations. In brief, using our advanced in situ gas cell technique, evolution of the surface of the Pt3Co nanoparticles was monitored at the atomic scale during their exposure to an oxygen atmosphere at elevated temperature, and it was found that Co segregation and oxidation take place on {11...
Ingemar Lundström - One of the best experts on this subject based on the ideXlab platform.
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distributed sensor system for quantification of individual components in a multiple gas mixture
Analytical Chemistry, 1999Co-Authors: Ingemar LundströmAbstract:A distributed gas sensor system consists of a measurement cell, with a row of gas sensors, and a catalyst in proximity to the sensors. The test gas flows along the row of sensors. The gas is then, if possible, catalytically altered along the flow direction and monitored at different stages of catalytic conversion with the sensors. Here, a system consisting of combinations of palladium and Platinum Metal oxide semiconductor field effect transistor (MOSFET) sensors, and palladium and Platinum catalysts, was studied, especially regarding the problem of quantifying individual components in multiple-gas mixtures. Quaternary mixtures of hydrogen, ammonia, ethyne (C2H2), and ethanol were analyzed with the system. Using selected sensor signals from the different sensor/catalysts combinations, at different stages of catalytic conversion, high-accuracy artificial neural network prediction models were obtained for all four gas components. It was further shown that the two sensor types gave different information, and...
Shuyi Zhang - One of the best experts on this subject based on the ideXlab platform.
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revealing surface elemental composition and dynamic processes involved in facet dependent oxidation of pt3co nanoparticles via in situ transmission electron microscopy
Nano Letters, 2017Co-Authors: Masatoshi Onoue, G.w. Graham, Shuyi Zhang, Ruqian WuAbstract:Since catalytic performance of Platinum–Metal (Pt–M) nanoparticles is primarily determined by the chemical and structural configurations of the outermost atomic layers, detailed knowledge of the distribution of Pt and M surface atoms is crucial for the design of Pt–M electrocatalysts with optimum activity. Further, an understanding of how the surface composition and structure of electrocatalysts may be controlled by external means is useful for their efficient production. Here, we report our study of surface composition and the dynamics involved in facet-dependent oxidation of equilibrium-shaped Pt3Co nanoparticles in an initially disordered state via in situ transmission electron microscopy and density functional calculations. In brief, using our advanced in situ gas cell technique, evolution of the surface of the Pt3Co nanoparticles was monitored at the atomic scale during their exposure to an oxygen atmosphere at elevated temperature, and it was found that Co segregation and oxidation take place on {11...
G.w. Graham - One of the best experts on this subject based on the ideXlab platform.
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revealing surface elemental composition and dynamic processes involved in facet dependent oxidation of pt3co nanoparticles via in situ transmission electron microscopy
Nano Letters, 2017Co-Authors: Masatoshi Onoue, G.w. Graham, Shuyi Zhang, Ruqian WuAbstract:Since catalytic performance of Platinum–Metal (Pt–M) nanoparticles is primarily determined by the chemical and structural configurations of the outermost atomic layers, detailed knowledge of the distribution of Pt and M surface atoms is crucial for the design of Pt–M electrocatalysts with optimum activity. Further, an understanding of how the surface composition and structure of electrocatalysts may be controlled by external means is useful for their efficient production. Here, we report our study of surface composition and the dynamics involved in facet-dependent oxidation of equilibrium-shaped Pt3Co nanoparticles in an initially disordered state via in situ transmission electron microscopy and density functional calculations. In brief, using our advanced in situ gas cell technique, evolution of the surface of the Pt3Co nanoparticles was monitored at the atomic scale during their exposure to an oxygen atmosphere at elevated temperature, and it was found that Co segregation and oxidation take place on {11...