The Experts below are selected from a list of 13821 Experts worldwide ranked by ideXlab platform
Robert R. Gayasov - One of the best experts on this subject based on the ideXlab platform.
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The sixth spectrum of Platinum (Pt VI)
Atomic Data and Nuclear Data Tables, 2017Co-Authors: Vladimir I. Azarov, Robert R. GayasovAbstract:Abstract The spectrum of Platinum was observed in the (300–2100) A wavelength region. The ( 5 d 5 + 5 d 4 6 s ) – 5 d 4 6 p transition array of five times ionized Platinum, Pt VI, has been investigated and 1390 spectral lines have been classified in the region of (399–1564) A. The analysis has led to the determination of the 5 d 5 , 5 d 4 6 s and 5 d 4 6 p configurations. All 37 theoretically possible 5 d 5 levels, 46 of 63 possible 5 d 4 6 s levels and 167 of 180 possible 5 d 4 6 p levels have been established. The orthogonal operators technique was used to calculate the level structure and transition probabilities. The energy parameters have been determined by the least squares fit to the observed levels. Calculated transition probability and energy values, as well as LS-compositions obtained from the fitted parameters are presented. The uncertainties of the established energy levels and calculated (Ritz) wavenumbers are included.
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The seventh spectrum of Platinum (Pt VII): Analysis of the (5d4+5d36s)–5d36p transition array
Atomic Data and Nuclear Data Tables, 2017Co-Authors: Vladimir I. Azarov, Robert R. GayasovAbstract:Abstract The spectrum of Platinum was observed in the (300–2100) A wavelength region. The (5d4+5d36s)–5d36p transition array of six times ionized Platinum, Pt VII, has been investigated and 759 spectral lines have been classified in the region of (337–1273) A. The analysis has led to the determination of the 5d4, 5d36s and 5d36p configurations. All 34 theoretically possible 5d4 levels, 35 of 38 possible 5d36s levels and 108 of 110 possible 5d36p levels have been established. The orthogonal operators technique was used to calculate the level structure and transition probabilities. The energy parameters have been determined by the least squares fit to the observed levels. Calculated transition probability and energy values, as well as LS-compositions obtained from the fitted parameters are presented.
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Revised and extended analysis of the eighth spectrum of Platinum (Pt VIII)
Atomic Data and Nuclear Data Tables, 2017Co-Authors: Vladimir I. Azarov, Robert R. GayasovAbstract:Abstract The spectrum of Platinum was observed in the 300–2100 A wavelength region. Grazing and normal incidence VUV spectrographs have been used to record the spectrum. The (5d3+5d26s)−5d26p transition array of seven times ionized Platinum, Pt VIII, has been investigated. The configurations 5d3 and 5d26p had been previously studied, and all levels of these configurations (19 and 45 levels, respectively) had been established. The previous analysis was based on 178 classified spectral lines. In the current analysis we have confirmed identification of all previously found levels and all but 10 previously assigned spectral lines, although we have detected a large (up to 35 mA) systematic shift in wavelength measurements used in the previous analysis. Based on new wavelength measurements, we have corrected the 5d3 and 5d26p energy level values (by up to 55 cm−1) and established for the first time 14 out of 16 theoretically possible 5d26s levels in Pt VIII. The total list of identified lines (including 180 new lines) contains 349 entries. The orthogonal operators technique was used to calculate the level structure and transition probabilities. The energy parameters have been determined by the least squares fit to the observed levels. Calculated transition probability and energy values, as well as LS-compositions obtained from the fitted parameters are presented.
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The fourth spectrum of Platinum (Pt IV): Determination of the 5d7, 5d66s and 5d66p configurations
Atomic Data and Nuclear Data Tables, 2016Co-Authors: Vladimir I. Azarov, Robert R. GayasovAbstract:Abstract The spectrum of three times ionized Platinum, Pt IV, was investigated in the 530–1800 A wavelength region. The analysis has resulted in the determination of the 5d7, 5d66s and 5d66p configurations. Seventeen of 19 theoretically possible 5d7 levels, 58 of 63 possible 5d66s levels and 162 of 180 possible 5d66p levels have been established. The levels are based on 1478 classified spectral lines. The level structure and transition probabilities were calculated by means of the orthogonal operators method. The energy parameters have been determined by the least squares fit to the observed levels. Calculated energy values and LS-compositions, as well as gA values obtained from the fitted parameter values are presented.
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The fifth spectrum of Platinum (Pt V): Analysis of the (5d6+5d56s)−5d56p transition array
Atomic Data and Nuclear Data Tables, 2016Co-Authors: Vladimir I. Azarov, Robert R. GayasovAbstract:Abstract The spectrum of Platinum was observed in the 300–2100 A wavelength region. The ( 5 d 6 + 5 d 5 6 s ) − 5 d 5 6 p transition array of four times ionized Platinum, Pt V, has been investigated and 1659 spectral lines have been classified in the region of 460–1730 A. The analysis has led to the determination of the 5 d 6 , 5 d 5 6 s and 5 d 5 6 p configurations. Thirty two of 34 theoretically possible 5 d 6 levels, 45 of 74 possible 5 d 5 6 s levels and 181 of 214 possible 5 d 5 6 p levels have been established. The orthogonal operators technique was used to calculate the level structure and transition probabilities. The energy parameters have been determined by the least squares fit to the observed levels. Calculated transition probability and energy values, as well as LS -compositions obtained from the fitted parameters are presented.
Takayuki Hirai - One of the best experts on this subject based on the ideXlab platform.
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Platinum nanoparticles strongly associated with graphitic carbon nitride as efficient co catalysts for photocatalytic hydrogen evolution under visible light
Chemical Communications, 2014Co-Authors: Yasuhiro Shiraishi, Yusuke Kofuji, Shunsuke Kanazawa, Hirokatsu Sakamoto, Satoshi Ichikawa, Shunsuke Tanaka, Takayuki HiraiAbstract:Platinum (Pt) nanoparticles with 420 nm). This is achieved by strong Pt-support interaction due to the high temperature treatment, which facilitates efficient transfer of photoformed conduction band electrons on g-C3N4 to Pt particles.
Vladimir I. Azarov - One of the best experts on this subject based on the ideXlab platform.
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The sixth spectrum of Platinum (Pt VI)
Atomic Data and Nuclear Data Tables, 2017Co-Authors: Vladimir I. Azarov, Robert R. GayasovAbstract:Abstract The spectrum of Platinum was observed in the (300–2100) A wavelength region. The ( 5 d 5 + 5 d 4 6 s ) – 5 d 4 6 p transition array of five times ionized Platinum, Pt VI, has been investigated and 1390 spectral lines have been classified in the region of (399–1564) A. The analysis has led to the determination of the 5 d 5 , 5 d 4 6 s and 5 d 4 6 p configurations. All 37 theoretically possible 5 d 5 levels, 46 of 63 possible 5 d 4 6 s levels and 167 of 180 possible 5 d 4 6 p levels have been established. The orthogonal operators technique was used to calculate the level structure and transition probabilities. The energy parameters have been determined by the least squares fit to the observed levels. Calculated transition probability and energy values, as well as LS-compositions obtained from the fitted parameters are presented. The uncertainties of the established energy levels and calculated (Ritz) wavenumbers are included.
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The seventh spectrum of Platinum (Pt VII): Analysis of the (5d4+5d36s)–5d36p transition array
Atomic Data and Nuclear Data Tables, 2017Co-Authors: Vladimir I. Azarov, Robert R. GayasovAbstract:Abstract The spectrum of Platinum was observed in the (300–2100) A wavelength region. The (5d4+5d36s)–5d36p transition array of six times ionized Platinum, Pt VII, has been investigated and 759 spectral lines have been classified in the region of (337–1273) A. The analysis has led to the determination of the 5d4, 5d36s and 5d36p configurations. All 34 theoretically possible 5d4 levels, 35 of 38 possible 5d36s levels and 108 of 110 possible 5d36p levels have been established. The orthogonal operators technique was used to calculate the level structure and transition probabilities. The energy parameters have been determined by the least squares fit to the observed levels. Calculated transition probability and energy values, as well as LS-compositions obtained from the fitted parameters are presented.
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Revised and extended analysis of the eighth spectrum of Platinum (Pt VIII)
Atomic Data and Nuclear Data Tables, 2017Co-Authors: Vladimir I. Azarov, Robert R. GayasovAbstract:Abstract The spectrum of Platinum was observed in the 300–2100 A wavelength region. Grazing and normal incidence VUV spectrographs have been used to record the spectrum. The (5d3+5d26s)−5d26p transition array of seven times ionized Platinum, Pt VIII, has been investigated. The configurations 5d3 and 5d26p had been previously studied, and all levels of these configurations (19 and 45 levels, respectively) had been established. The previous analysis was based on 178 classified spectral lines. In the current analysis we have confirmed identification of all previously found levels and all but 10 previously assigned spectral lines, although we have detected a large (up to 35 mA) systematic shift in wavelength measurements used in the previous analysis. Based on new wavelength measurements, we have corrected the 5d3 and 5d26p energy level values (by up to 55 cm−1) and established for the first time 14 out of 16 theoretically possible 5d26s levels in Pt VIII. The total list of identified lines (including 180 new lines) contains 349 entries. The orthogonal operators technique was used to calculate the level structure and transition probabilities. The energy parameters have been determined by the least squares fit to the observed levels. Calculated transition probability and energy values, as well as LS-compositions obtained from the fitted parameters are presented.
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The fourth spectrum of Platinum (Pt IV): Determination of the 5d7, 5d66s and 5d66p configurations
Atomic Data and Nuclear Data Tables, 2016Co-Authors: Vladimir I. Azarov, Robert R. GayasovAbstract:Abstract The spectrum of three times ionized Platinum, Pt IV, was investigated in the 530–1800 A wavelength region. The analysis has resulted in the determination of the 5d7, 5d66s and 5d66p configurations. Seventeen of 19 theoretically possible 5d7 levels, 58 of 63 possible 5d66s levels and 162 of 180 possible 5d66p levels have been established. The levels are based on 1478 classified spectral lines. The level structure and transition probabilities were calculated by means of the orthogonal operators method. The energy parameters have been determined by the least squares fit to the observed levels. Calculated energy values and LS-compositions, as well as gA values obtained from the fitted parameter values are presented.
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The fifth spectrum of Platinum (Pt V): Analysis of the (5d6+5d56s)−5d56p transition array
Atomic Data and Nuclear Data Tables, 2016Co-Authors: Vladimir I. Azarov, Robert R. GayasovAbstract:Abstract The spectrum of Platinum was observed in the 300–2100 A wavelength region. The ( 5 d 6 + 5 d 5 6 s ) − 5 d 5 6 p transition array of four times ionized Platinum, Pt V, has been investigated and 1659 spectral lines have been classified in the region of 460–1730 A. The analysis has led to the determination of the 5 d 6 , 5 d 5 6 s and 5 d 5 6 p configurations. Thirty two of 34 theoretically possible 5 d 6 levels, 45 of 74 possible 5 d 5 6 s levels and 181 of 214 possible 5 d 5 6 p levels have been established. The orthogonal operators technique was used to calculate the level structure and transition probabilities. The energy parameters have been determined by the least squares fit to the observed levels. Calculated transition probability and energy values, as well as LS -compositions obtained from the fitted parameters are presented.
D. Morgan - One of the best experts on this subject based on the ideXlab platform.
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Instability of Supported Platinum Nanoparticles in Low-Temperature Fuel Cells
Topics in Catalysis, 2007Co-Authors: Y. Shao-horn, W. C. Sheng, S. Chen, P. J. Ferreira, E. F. Holby, D. MorganAbstract:This paper discusses the mechanisms of surface area loss of supported Platinum (Pt) electrocatalysts in low-temperature fuel cells. It is argued that submonolayer dissolution of Pt nanoparticles governs the surface area loss at high voltages by increasing the loss of Pt from carbon and coarsening of Pt nanoparticles on carbon.
Yasuhiro Shiraishi - One of the best experts on this subject based on the ideXlab platform.
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Platinum nanoparticles strongly associated with graphitic carbon nitride as efficient co catalysts for photocatalytic hydrogen evolution under visible light
Chemical Communications, 2014Co-Authors: Yasuhiro Shiraishi, Yusuke Kofuji, Shunsuke Kanazawa, Hirokatsu Sakamoto, Satoshi Ichikawa, Shunsuke Tanaka, Takayuki HiraiAbstract:Platinum (Pt) nanoparticles with 420 nm). This is achieved by strong Pt-support interaction due to the high temperature treatment, which facilitates efficient transfer of photoformed conduction band electrons on g-C3N4 to Pt particles.