The Experts below are selected from a list of 17943 Experts worldwide ranked by ideXlab platform
Panagiotis Tsiakaras - One of the best experts on this subject based on the ideXlab platform.
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direct ethanol fuel cells based on ptSn anodes the effect of Sn Content on the fuel cell performance
Journal of Power Sources, 2005Co-Authors: Weijiang Zhou, Shuqin Song, S. Douvartzides, Qin Xin, Z.-h. Zhou, Gongquan Sun, Panagiotis TsiakarasAbstract:Abstract In the present work, several carbon supported PtSn catalysts with different Pt/Sn atomic ratios were synthesized and characterized by X-ray diffraction (XRD), Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Both the results of TEM and XRD showed that all in-house prepared carbon supported Pt and PtSn catalysts had nanosized particles with narrow size distribution. According to the primary analysis of XPS results, it was confirmed that the main part of Pt of the as-prepared catalysts is in metallic state while the main part of Sn is in oxidized state. The performances of single direct ethanol fuel cells were different from each other with different anode catalysts and at different temperatures. It was found that, the single DEFC employing Pt3Sn2/C showed better performance at 60 °C while the direct ethanol fuel cells with Pt2Sn1/C and Pt3Sn2/C exhibited similar performances at 75 °C. Furthermore, at 90 °C, Pt2Sn1/C was identified as a more suitable anode catalyst for direct ethanol fuel cells in terms of the fuel cell maximum power density. Surface oxygen-containing species, lattice parameters and ohmic effects, which are related to the Sn Content, are thought as the main factors influencing the catalyst activity and consequently the performance of single direct ethanol fuel cells.
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Direct ethanol fuel cells based on PtSn anodes:the effect of Sn Content on the fuel cell performance
Journal of Power Sources, 2005Co-Authors: Weijiang Zhou, Shuqin Song, S. Douvartzides, Qin Xin, Z.-h. Zhou, Wenzhen Li, G-q Sun, Panagiotis TsiakarasAbstract:In the present work, several carbon supported ptSn catalysts with different pt/Sn atomic ratios were synthesized and characterized by x-ray diffraction (xrd), transmission electron microscopy (tem) and x-ray photoelectron spectroscopy (xps). both the results of tem and xrd showed that all in-house prepared carbon supported pt and ptSn catalysts had nanosized particles with narrow size distribution. according to the primary analysis of xps results, it was confirmed that the main part of pt of the as-prepared catalysts is in metallic state while the main part of Sn is in oxidized state. the performances of single direct ethanol fuel cells were different from each other with different anode catalysts and at different temperatures. it was found that, the single defc employing pt3Sn2/c showed better performance at 60degreesc while the direct ethanol fuel cells with pt2Sn1/c and pt3Sn2/c exhibited similar performances at 75 degreesc. furthermore, at 90 degreesc, pt2Sn1/c was identified as a more suitable anode catalyst for direct ethanol fuel cells in terms of the fuel cell maximum power density. surface oxygen-containing species, lattice parameters and ohmic effects, which are related to the Sn Content, are thought as the main factors influencing the catalyst activity and consequently the performance of single direct ethanol fuel cells. (c) 2004 elsevier b.v. all rights reserved.
Weijiang Zhou - One of the best experts on this subject based on the ideXlab platform.
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direct ethanol fuel cells based on ptSn anodes the effect of Sn Content on the fuel cell performance
Journal of Power Sources, 2005Co-Authors: Weijiang Zhou, Shuqin Song, S. Douvartzides, Qin Xin, Z.-h. Zhou, Gongquan Sun, Panagiotis TsiakarasAbstract:Abstract In the present work, several carbon supported PtSn catalysts with different Pt/Sn atomic ratios were synthesized and characterized by X-ray diffraction (XRD), Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Both the results of TEM and XRD showed that all in-house prepared carbon supported Pt and PtSn catalysts had nanosized particles with narrow size distribution. According to the primary analysis of XPS results, it was confirmed that the main part of Pt of the as-prepared catalysts is in metallic state while the main part of Sn is in oxidized state. The performances of single direct ethanol fuel cells were different from each other with different anode catalysts and at different temperatures. It was found that, the single DEFC employing Pt3Sn2/C showed better performance at 60 °C while the direct ethanol fuel cells with Pt2Sn1/C and Pt3Sn2/C exhibited similar performances at 75 °C. Furthermore, at 90 °C, Pt2Sn1/C was identified as a more suitable anode catalyst for direct ethanol fuel cells in terms of the fuel cell maximum power density. Surface oxygen-containing species, lattice parameters and ohmic effects, which are related to the Sn Content, are thought as the main factors influencing the catalyst activity and consequently the performance of single direct ethanol fuel cells.
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Direct ethanol fuel cells based on PtSn anodes:the effect of Sn Content on the fuel cell performance
Journal of Power Sources, 2005Co-Authors: Weijiang Zhou, Shuqin Song, S. Douvartzides, Qin Xin, Z.-h. Zhou, Wenzhen Li, G-q Sun, Panagiotis TsiakarasAbstract:In the present work, several carbon supported ptSn catalysts with different pt/Sn atomic ratios were synthesized and characterized by x-ray diffraction (xrd), transmission electron microscopy (tem) and x-ray photoelectron spectroscopy (xps). both the results of tem and xrd showed that all in-house prepared carbon supported pt and ptSn catalysts had nanosized particles with narrow size distribution. according to the primary analysis of xps results, it was confirmed that the main part of pt of the as-prepared catalysts is in metallic state while the main part of Sn is in oxidized state. the performances of single direct ethanol fuel cells were different from each other with different anode catalysts and at different temperatures. it was found that, the single defc employing pt3Sn2/c showed better performance at 60degreesc while the direct ethanol fuel cells with pt2Sn1/c and pt3Sn2/c exhibited similar performances at 75 degreesc. furthermore, at 90 degreesc, pt2Sn1/c was identified as a more suitable anode catalyst for direct ethanol fuel cells in terms of the fuel cell maximum power density. surface oxygen-containing species, lattice parameters and ohmic effects, which are related to the Sn Content, are thought as the main factors influencing the catalyst activity and consequently the performance of single direct ethanol fuel cells. (c) 2004 elsevier b.v. all rights reserved.
Thotsaphon Threrujirapapong - One of the best experts on this subject based on the ideXlab platform.
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Thermal Efficiency of a New Prototype of Evacuated Tube Collector using Sn-Al2O3 as a Selective Solar Absorber
2018Co-Authors: Warisa Wamae, Tawat Suriwong, Thotsaphon ThrerujirapapongAbstract:Three tin pigmented aluminium oxide (Sn-Al 2 O 3 )films were prepared with different tin Content using an anodization process, which is applied as a selective solar absorber in a new prototype of evacuated tube collector (ETC). The morphology and distribution of elements on the coatings were characterized using a Scanning Electron Microscope (SEM) equipped with an Energy Dispersive X-ray (EDX) analyzer. The spectrally selective properties, defined as the ratio of solar absorptance ( α sol ) to thermal emittance ( e therm ) were examined. In order to investigate the thermal performance of ETC using Sn-Al 2 O 3 on an Al fin as a solar receiver, thermal efficiency ( η ) of the ETC was collected under steady-state conditions, as prescribed by ISO 9806-1 standard. The results, of the Sn-Al 2 O 3 coatings reached a darker black colour with an increase in the colouring time. The samples were composed of different Contents of Sn in the Al 2 O 3 layer. The solar selectivity ( α sol / e therm ) significantly increased with the increases in Sn Content. The maximum thermal efficiency ( η max ) of the ETC under the nearly constant heat loss coefficient ( U L ), was obviously increased with the increasing Sn Content. Therefore, the Sn-Al 2 O 3 with different Sn Contents is a good candidate for selective solar absorbers in a new prototype of ETC.
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influence of tin Content on spectral selectivity and thermal conductivity of Sn al2o3 solar selective absorber
Materials for Renewable and Sustainable Energy, 2018Co-Authors: Warisa Wamae, Tawat Suriwong, Thotsaphon ThrerujirapapongAbstract:The tin-pigmented aluminium oxide film (Sn–Al2O3) based solar selective absorber was successfully prepared with three different Contents of tin by an anodization process. The phase and morphology of the Sn–Al2O3 were measured by X-ray diffractometer and a scanning electron microscope equipped with an energy dispersive X-ray analyser. The reflectance (R) of the coating was determined by Ultraviolet–visible-near infrared spectrophotometer in the wavelength interval of 300–2500 nm and the Fourier transform infrared spectrophotometer in the wavelength of infrared region (2500–25,000 nm). As a result, aluminium and tin phases were detected at the coating surface. The Al2O3 films were formed and compacted as a barrier on the Al substrate. The compositions of the oxide film composed of tin (Sn), aluminium (Al) and oxygen (O) elements. With increasing Sn Content, the solar absorptance (αsol) gradually increased, but it has little effect on the thermal emittance (etherm). The thermal conductivity of Sn–Al2O3 samples decreased with increasing Sn Content as a result of the increasing thickness of the Sn layer at the interface leading to obstruct the free electrons and phonon contributions. The present result suggests that the increasing Sn Content in the Sn–Al2O3 coating can enhance the solar selectivity properties and a good solar absorber material.
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Influence of tin Content on spectral selectivity and thermal conductivity of Sn–Al2O3 solar selective absorber
'Springer Science and Business Media LLC', 2018Co-Authors: Warisa Wamae, Tawat Suriwong, Thotsaphon ThrerujirapapongAbstract:Abstract The tin-pigmented aluminium oxide film (Sn–Al2O3) based solar selective absorber was successfully prepared with three different Contents of tin by an anodization process. The phase and morphology of the Sn–Al2O3 were measured by X-ray diffractometer and a scanning electron microscope equipped with an energy dispersive X-ray analyser. The reflectance (R) of the coating was determined by Ultraviolet–visible-near infrared spectrophotometer in the wavelength interval of 300–2500 nm and the Fourier transform infrared spectrophotometer in the wavelength of infrared region (2500–25,000 nm). As a result, aluminium and tin phases were detected at the coating surface. The Al2O3 films were formed and compacted as a barrier on the Al substrate. The compositions of the oxide film composed of tin (Sn), aluminium (Al) and oxygen (O) elements. With increasing Sn Content, the solar absorptance (α sol) gradually increased, but it has little effect on the thermal emittance (ε therm). The thermal conductivity of Sn–Al2O3 samples decreased with increasing Sn Content as a result of the increasing thickness of the Sn layer at the interface leading to obstruct the free electrons and phonon contributions. The present result suggests that the increasing Sn Content in the Sn–Al2O3 coating can enhance the solar selectivity properties and a good solar absorber material
S. Douvartzides - One of the best experts on this subject based on the ideXlab platform.
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direct ethanol fuel cells based on ptSn anodes the effect of Sn Content on the fuel cell performance
Journal of Power Sources, 2005Co-Authors: Weijiang Zhou, Shuqin Song, S. Douvartzides, Qin Xin, Z.-h. Zhou, Gongquan Sun, Panagiotis TsiakarasAbstract:Abstract In the present work, several carbon supported PtSn catalysts with different Pt/Sn atomic ratios were synthesized and characterized by X-ray diffraction (XRD), Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Both the results of TEM and XRD showed that all in-house prepared carbon supported Pt and PtSn catalysts had nanosized particles with narrow size distribution. According to the primary analysis of XPS results, it was confirmed that the main part of Pt of the as-prepared catalysts is in metallic state while the main part of Sn is in oxidized state. The performances of single direct ethanol fuel cells were different from each other with different anode catalysts and at different temperatures. It was found that, the single DEFC employing Pt3Sn2/C showed better performance at 60 °C while the direct ethanol fuel cells with Pt2Sn1/C and Pt3Sn2/C exhibited similar performances at 75 °C. Furthermore, at 90 °C, Pt2Sn1/C was identified as a more suitable anode catalyst for direct ethanol fuel cells in terms of the fuel cell maximum power density. Surface oxygen-containing species, lattice parameters and ohmic effects, which are related to the Sn Content, are thought as the main factors influencing the catalyst activity and consequently the performance of single direct ethanol fuel cells.
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Direct ethanol fuel cells based on PtSn anodes:the effect of Sn Content on the fuel cell performance
Journal of Power Sources, 2005Co-Authors: Weijiang Zhou, Shuqin Song, S. Douvartzides, Qin Xin, Z.-h. Zhou, Wenzhen Li, G-q Sun, Panagiotis TsiakarasAbstract:In the present work, several carbon supported ptSn catalysts with different pt/Sn atomic ratios were synthesized and characterized by x-ray diffraction (xrd), transmission electron microscopy (tem) and x-ray photoelectron spectroscopy (xps). both the results of tem and xrd showed that all in-house prepared carbon supported pt and ptSn catalysts had nanosized particles with narrow size distribution. according to the primary analysis of xps results, it was confirmed that the main part of pt of the as-prepared catalysts is in metallic state while the main part of Sn is in oxidized state. the performances of single direct ethanol fuel cells were different from each other with different anode catalysts and at different temperatures. it was found that, the single defc employing pt3Sn2/c showed better performance at 60degreesc while the direct ethanol fuel cells with pt2Sn1/c and pt3Sn2/c exhibited similar performances at 75 degreesc. furthermore, at 90 degreesc, pt2Sn1/c was identified as a more suitable anode catalyst for direct ethanol fuel cells in terms of the fuel cell maximum power density. surface oxygen-containing species, lattice parameters and ohmic effects, which are related to the Sn Content, are thought as the main factors influencing the catalyst activity and consequently the performance of single direct ethanol fuel cells. (c) 2004 elsevier b.v. all rights reserved.
Z.-h. Zhou - One of the best experts on this subject based on the ideXlab platform.
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direct ethanol fuel cells based on ptSn anodes the effect of Sn Content on the fuel cell performance
Journal of Power Sources, 2005Co-Authors: Weijiang Zhou, Shuqin Song, S. Douvartzides, Qin Xin, Z.-h. Zhou, Gongquan Sun, Panagiotis TsiakarasAbstract:Abstract In the present work, several carbon supported PtSn catalysts with different Pt/Sn atomic ratios were synthesized and characterized by X-ray diffraction (XRD), Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Both the results of TEM and XRD showed that all in-house prepared carbon supported Pt and PtSn catalysts had nanosized particles with narrow size distribution. According to the primary analysis of XPS results, it was confirmed that the main part of Pt of the as-prepared catalysts is in metallic state while the main part of Sn is in oxidized state. The performances of single direct ethanol fuel cells were different from each other with different anode catalysts and at different temperatures. It was found that, the single DEFC employing Pt3Sn2/C showed better performance at 60 °C while the direct ethanol fuel cells with Pt2Sn1/C and Pt3Sn2/C exhibited similar performances at 75 °C. Furthermore, at 90 °C, Pt2Sn1/C was identified as a more suitable anode catalyst for direct ethanol fuel cells in terms of the fuel cell maximum power density. Surface oxygen-containing species, lattice parameters and ohmic effects, which are related to the Sn Content, are thought as the main factors influencing the catalyst activity and consequently the performance of single direct ethanol fuel cells.
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Direct ethanol fuel cells based on PtSn anodes:the effect of Sn Content on the fuel cell performance
Journal of Power Sources, 2005Co-Authors: Weijiang Zhou, Shuqin Song, S. Douvartzides, Qin Xin, Z.-h. Zhou, Wenzhen Li, G-q Sun, Panagiotis TsiakarasAbstract:In the present work, several carbon supported ptSn catalysts with different pt/Sn atomic ratios were synthesized and characterized by x-ray diffraction (xrd), transmission electron microscopy (tem) and x-ray photoelectron spectroscopy (xps). both the results of tem and xrd showed that all in-house prepared carbon supported pt and ptSn catalysts had nanosized particles with narrow size distribution. according to the primary analysis of xps results, it was confirmed that the main part of pt of the as-prepared catalysts is in metallic state while the main part of Sn is in oxidized state. the performances of single direct ethanol fuel cells were different from each other with different anode catalysts and at different temperatures. it was found that, the single defc employing pt3Sn2/c showed better performance at 60degreesc while the direct ethanol fuel cells with pt2Sn1/c and pt3Sn2/c exhibited similar performances at 75 degreesc. furthermore, at 90 degreesc, pt2Sn1/c was identified as a more suitable anode catalyst for direct ethanol fuel cells in terms of the fuel cell maximum power density. surface oxygen-containing species, lattice parameters and ohmic effects, which are related to the Sn Content, are thought as the main factors influencing the catalyst activity and consequently the performance of single direct ethanol fuel cells. (c) 2004 elsevier b.v. all rights reserved.
