The Experts below are selected from a list of 42 Experts worldwide ranked by ideXlab platform
Zhenxiang Cheng - One of the best experts on this subject based on the ideXlab platform.
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optimized electronic Configuration to improve the surface absorption and bulk conductivity for enhanced oxygen evolution reaction
Journal of the American Chemical Society, 2019Co-Authors: Yanhua Sun, Huan Liu, Xiaolin Wang, Zhenxiang ChengAbstract:The composition and structure are crucial for stabilizing an appropriate electronic Configuration (Unit eg electron for example) in high-efficiency electrocatalysts for the oxygen evolution reaction (OER). Here, an excellent platform to investigate the roles of the composition and structure in tuning the electron Configuration for higher OER efficiency is provided by layered perovskite oxides with subtle variations of composition and structure (doping with 0%, 50%, and 100% cobalt in the Bi7Fe3Ti3O21). The crystal structures were analyzed by X-ray diffraction refinement, and the electronic structures were calculated based on X-ray absorption spectroscopy and magnetization vs temperature plots according to the Curie–Weiss law. The results indicate that the elongation of oxygen octahedra along the c-axis in layered perovskite could stabilize Co ions in the intermediate spin (IS) (t2g)5(eg)1 state, resulting in dramatically enhanced electronic conductivity and absorption capacity. Subsequently, the OER effic...
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Optimized Electronic Configuration to Improve the Surface Absorption and Bulk Conductivity for Enhanced Oxygen Evolution Reaction
2019Co-Authors: Yanhua Sun, Huan Liu, Xiaolin Wang, Zhenxiang ChengAbstract:The composition and structure are crucial for stabilizing an appropriate electronic Configuration (Unit eg electron for example) in high-efficiency electrocatalysts for the oxygen evolution reaction (OER). Here, an excellent platform to investigate the roles of the composition and structure in tuning the electron Configuration for higher OER efficiency is provided by layered perovskite oxides with subtle variations of composition and structure (doping with 0%, 50%, and 100% cobalt in the Bi7Fe3Ti3O21). The crystal structures were analyzed by X-ray diffraction refinement, and the electronic structures were calculated based on X-ray absorption spectroscopy and magnetization vs temperature plots according to the Curie–Weiss law. The results indicate that the elongation of oxygen octahedra along the c-axis in layered perovskite could stabilize Co ions in the intermediate spin (IS) (t2g)5(eg)1 state, resulting in dramatically enhanced electronic conductivity and absorption capacity. Subsequently, the OER efficiency of sample with 100% Co was found to be (incredibly) 100 times higher than that of the sample with 0% Co, with the current density increased from 0.13 to 43 mA/cm2 (1.8 V vs reversible hydrogen electrode); the Tafel slope was reduced from 656 to 87 mV/dec; and double-layer capacity enhanced from 174 to 4193 μF/cm2. This work reveals that both the composition and structure should be taken into account to stabilize a suitable electronic structure such as IS Co ions with moderate absorption and benign electronic conductivity for high-efficiency catalysis of the OER
Yanhua Sun - One of the best experts on this subject based on the ideXlab platform.
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optimized electronic Configuration to improve the surface absorption and bulk conductivity for enhanced oxygen evolution reaction
Journal of the American Chemical Society, 2019Co-Authors: Yanhua Sun, Huan Liu, Xiaolin Wang, Zhenxiang ChengAbstract:The composition and structure are crucial for stabilizing an appropriate electronic Configuration (Unit eg electron for example) in high-efficiency electrocatalysts for the oxygen evolution reaction (OER). Here, an excellent platform to investigate the roles of the composition and structure in tuning the electron Configuration for higher OER efficiency is provided by layered perovskite oxides with subtle variations of composition and structure (doping with 0%, 50%, and 100% cobalt in the Bi7Fe3Ti3O21). The crystal structures were analyzed by X-ray diffraction refinement, and the electronic structures were calculated based on X-ray absorption spectroscopy and magnetization vs temperature plots according to the Curie–Weiss law. The results indicate that the elongation of oxygen octahedra along the c-axis in layered perovskite could stabilize Co ions in the intermediate spin (IS) (t2g)5(eg)1 state, resulting in dramatically enhanced electronic conductivity and absorption capacity. Subsequently, the OER effic...
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Optimized Electronic Configuration to Improve the Surface Absorption and Bulk Conductivity for Enhanced Oxygen Evolution Reaction
2019Co-Authors: Yanhua Sun, Huan Liu, Xiaolin Wang, Zhenxiang ChengAbstract:The composition and structure are crucial for stabilizing an appropriate electronic Configuration (Unit eg electron for example) in high-efficiency electrocatalysts for the oxygen evolution reaction (OER). Here, an excellent platform to investigate the roles of the composition and structure in tuning the electron Configuration for higher OER efficiency is provided by layered perovskite oxides with subtle variations of composition and structure (doping with 0%, 50%, and 100% cobalt in the Bi7Fe3Ti3O21). The crystal structures were analyzed by X-ray diffraction refinement, and the electronic structures were calculated based on X-ray absorption spectroscopy and magnetization vs temperature plots according to the Curie–Weiss law. The results indicate that the elongation of oxygen octahedra along the c-axis in layered perovskite could stabilize Co ions in the intermediate spin (IS) (t2g)5(eg)1 state, resulting in dramatically enhanced electronic conductivity and absorption capacity. Subsequently, the OER efficiency of sample with 100% Co was found to be (incredibly) 100 times higher than that of the sample with 0% Co, with the current density increased from 0.13 to 43 mA/cm2 (1.8 V vs reversible hydrogen electrode); the Tafel slope was reduced from 656 to 87 mV/dec; and double-layer capacity enhanced from 174 to 4193 μF/cm2. This work reveals that both the composition and structure should be taken into account to stabilize a suitable electronic structure such as IS Co ions with moderate absorption and benign electronic conductivity for high-efficiency catalysis of the OER
Xiaolin Wang - One of the best experts on this subject based on the ideXlab platform.
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optimized electronic Configuration to improve the surface absorption and bulk conductivity for enhanced oxygen evolution reaction
Journal of the American Chemical Society, 2019Co-Authors: Yanhua Sun, Huan Liu, Xiaolin Wang, Zhenxiang ChengAbstract:The composition and structure are crucial for stabilizing an appropriate electronic Configuration (Unit eg electron for example) in high-efficiency electrocatalysts for the oxygen evolution reaction (OER). Here, an excellent platform to investigate the roles of the composition and structure in tuning the electron Configuration for higher OER efficiency is provided by layered perovskite oxides with subtle variations of composition and structure (doping with 0%, 50%, and 100% cobalt in the Bi7Fe3Ti3O21). The crystal structures were analyzed by X-ray diffraction refinement, and the electronic structures were calculated based on X-ray absorption spectroscopy and magnetization vs temperature plots according to the Curie–Weiss law. The results indicate that the elongation of oxygen octahedra along the c-axis in layered perovskite could stabilize Co ions in the intermediate spin (IS) (t2g)5(eg)1 state, resulting in dramatically enhanced electronic conductivity and absorption capacity. Subsequently, the OER effic...
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Optimized Electronic Configuration to Improve the Surface Absorption and Bulk Conductivity for Enhanced Oxygen Evolution Reaction
2019Co-Authors: Yanhua Sun, Huan Liu, Xiaolin Wang, Zhenxiang ChengAbstract:The composition and structure are crucial for stabilizing an appropriate electronic Configuration (Unit eg electron for example) in high-efficiency electrocatalysts for the oxygen evolution reaction (OER). Here, an excellent platform to investigate the roles of the composition and structure in tuning the electron Configuration for higher OER efficiency is provided by layered perovskite oxides with subtle variations of composition and structure (doping with 0%, 50%, and 100% cobalt in the Bi7Fe3Ti3O21). The crystal structures were analyzed by X-ray diffraction refinement, and the electronic structures were calculated based on X-ray absorption spectroscopy and magnetization vs temperature plots according to the Curie–Weiss law. The results indicate that the elongation of oxygen octahedra along the c-axis in layered perovskite could stabilize Co ions in the intermediate spin (IS) (t2g)5(eg)1 state, resulting in dramatically enhanced electronic conductivity and absorption capacity. Subsequently, the OER efficiency of sample with 100% Co was found to be (incredibly) 100 times higher than that of the sample with 0% Co, with the current density increased from 0.13 to 43 mA/cm2 (1.8 V vs reversible hydrogen electrode); the Tafel slope was reduced from 656 to 87 mV/dec; and double-layer capacity enhanced from 174 to 4193 μF/cm2. This work reveals that both the composition and structure should be taken into account to stabilize a suitable electronic structure such as IS Co ions with moderate absorption and benign electronic conductivity for high-efficiency catalysis of the OER
Huan Liu - One of the best experts on this subject based on the ideXlab platform.
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optimized electronic Configuration to improve the surface absorption and bulk conductivity for enhanced oxygen evolution reaction
Journal of the American Chemical Society, 2019Co-Authors: Yanhua Sun, Huan Liu, Xiaolin Wang, Zhenxiang ChengAbstract:The composition and structure are crucial for stabilizing an appropriate electronic Configuration (Unit eg electron for example) in high-efficiency electrocatalysts for the oxygen evolution reaction (OER). Here, an excellent platform to investigate the roles of the composition and structure in tuning the electron Configuration for higher OER efficiency is provided by layered perovskite oxides with subtle variations of composition and structure (doping with 0%, 50%, and 100% cobalt in the Bi7Fe3Ti3O21). The crystal structures were analyzed by X-ray diffraction refinement, and the electronic structures were calculated based on X-ray absorption spectroscopy and magnetization vs temperature plots according to the Curie–Weiss law. The results indicate that the elongation of oxygen octahedra along the c-axis in layered perovskite could stabilize Co ions in the intermediate spin (IS) (t2g)5(eg)1 state, resulting in dramatically enhanced electronic conductivity and absorption capacity. Subsequently, the OER effic...
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Optimized Electronic Configuration to Improve the Surface Absorption and Bulk Conductivity for Enhanced Oxygen Evolution Reaction
2019Co-Authors: Yanhua Sun, Huan Liu, Xiaolin Wang, Zhenxiang ChengAbstract:The composition and structure are crucial for stabilizing an appropriate electronic Configuration (Unit eg electron for example) in high-efficiency electrocatalysts for the oxygen evolution reaction (OER). Here, an excellent platform to investigate the roles of the composition and structure in tuning the electron Configuration for higher OER efficiency is provided by layered perovskite oxides with subtle variations of composition and structure (doping with 0%, 50%, and 100% cobalt in the Bi7Fe3Ti3O21). The crystal structures were analyzed by X-ray diffraction refinement, and the electronic structures were calculated based on X-ray absorption spectroscopy and magnetization vs temperature plots according to the Curie–Weiss law. The results indicate that the elongation of oxygen octahedra along the c-axis in layered perovskite could stabilize Co ions in the intermediate spin (IS) (t2g)5(eg)1 state, resulting in dramatically enhanced electronic conductivity and absorption capacity. Subsequently, the OER efficiency of sample with 100% Co was found to be (incredibly) 100 times higher than that of the sample with 0% Co, with the current density increased from 0.13 to 43 mA/cm2 (1.8 V vs reversible hydrogen electrode); the Tafel slope was reduced from 656 to 87 mV/dec; and double-layer capacity enhanced from 174 to 4193 μF/cm2. This work reveals that both the composition and structure should be taken into account to stabilize a suitable electronic structure such as IS Co ions with moderate absorption and benign electronic conductivity for high-efficiency catalysis of the OER
Paulo Roberto Rosa Pereira - One of the best experts on this subject based on the ideXlab platform.
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virtual solution architecture for computer data systems
2005Co-Authors: John M Bell, Jason Michael Gartner, Randall Holmes, Nancy Kopp, William T Oconnell, Simon Field, Paulo Roberto Rosa PereiraAbstract:Virtual solution architecture for computer data systems. In one aspect, providing an architecture for a computer data system includes creating a virtual solution architecture that includes a plurality of building blocks, each building block characterized by balanced operation, and mapping the virtual solution architecture to a physical solution architecture for the computer data system. Another aspect includes providing at least one balanced Configuration Unit (BCU) in a computer data system, the BCU including at least one balanced partition Unit (BPU) that includes computer resources to provide balanced operation for the BPU.
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computer data systems implemented using a virtual solution architecture
2005Co-Authors: John W Bell, Jason Michael Gartner, Nancy Kopp, William T Oconnell, Randall R Holmes, Simon Field, Paulo Roberto Rosa PereiraAbstract:Virtual solution architecture for computer data systems. In one aspect, providing an architecture for a computer data system includes creating a virtual solution architecture that includes a plurality of building blocks, each building block characterized by balanced operation, and mapping the virtual solution architecture to a physical solution architecture for the computer data system. Another aspect includes providing at least one balanced Configuration Unit (BCU) in a computer data system, the BCU including at least one balanced partition Unit (BPU) that includes computer resources to provide balanced operation for the BPU.
