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Online since: October 2014
Authors: Hong Sun, Wen Shuai Song, Li Lian, Xun Wang
The structure of Pt cell was optimized at the beginning.
As *O2H2’s structure is unstable, the product finally divides into two *OH, shown in Fig. 5.
As the temperature elevated, the movement speed of the hydrogen atom and the reaction rate accelerate, but the product structure doesn’t change.
Electroreduction of dioxygen for fuel-cell applications: materials and challenges, Inorganic chemistry. 49(8) (2010) 3557-3566
Mechanism of molecular oxygen reduction at the cathode of a PEM fuel cell: non-electrochemical reactions on catalytic Pt particles, The Journal of Physical Chemistry C. 112(22) (2008) 8464-8475
As *O2H2’s structure is unstable, the product finally divides into two *OH, shown in Fig. 5.
As the temperature elevated, the movement speed of the hydrogen atom and the reaction rate accelerate, but the product structure doesn’t change.
Electroreduction of dioxygen for fuel-cell applications: materials and challenges, Inorganic chemistry. 49(8) (2010) 3557-3566
Mechanism of molecular oxygen reduction at the cathode of a PEM fuel cell: non-electrochemical reactions on catalytic Pt particles, The Journal of Physical Chemistry C. 112(22) (2008) 8464-8475
Online since: June 2019
Authors: Jia Fu, Tian Hou, Jing Rui Chen
AU=0 corresponds to isotropic structure.
Inorganic Chemistry, 1966, 5(11): 2067
The Journal of Physical Chemistry, 1992, 96(24): 9768
Journal of Physics and Chemistry of Solids, 2017, 101:74
First-principles study of (Ti5− xMgx) Si3 phases with the hexagonal D88 structure: Elastic properties and electronic structure[J].
Inorganic Chemistry, 1966, 5(11): 2067
The Journal of Physical Chemistry, 1992, 96(24): 9768
Journal of Physics and Chemistry of Solids, 2017, 101:74
First-principles study of (Ti5− xMgx) Si3 phases with the hexagonal D88 structure: Elastic properties and electronic structure[J].
Online since: November 2012
Authors: Wei Hao Yue, Jian Guo Gao
By integrated study systematically, Mengyejing Potash Deposit’s different scales of mineralization geological anomalies information:geological, geophysical, geochemical, and salt spring chemistry and remote sensing were extracted.
Ore structures are xenomorphic granular structure and hypidiomorphic granular structure.
Ore constructs are granular structure, irregular pulse, banded and layered structure. 4 Geophysical, Geochemical, Remote Sensing Features of Mining Area (1) Gravity field features:Bouguer gravity anomaly occurd in Mengyejing deposit area, 5×10-5~ 6×10-5m/s2 amplitude, anomalies caused by halite and potash
Fig.1 Geological map of Mengyejing potash deposit area (5)Remote sensing features: for Mengyejing potash deposit buried deep, from the remote sensing abnormal image interpretation, the effects is not very obvious, but are of certain extent for inferring mining area’s lineaments and circular structures. 5 Comprehensive Information Prospecting Model According to the regional metallogenic model and ore-controlling factors of the Mengyejing potash deposit, as well as geological, geophysical, geochemical exploration, remote sensing and salt springs chemical prospecting signs, combined with the properties of the regional mineralization, Mengyejing potash deposit prediction prospecting model and comprehensive information prospecting model is established(Fig.2). 6 Conclusions (1)Established a comprehensive information prediction prospecting model of Mengyejing-type potash deposits
Ore structures are xenomorphic granular structure and hypidiomorphic granular structure.
Ore constructs are granular structure, irregular pulse, banded and layered structure. 4 Geophysical, Geochemical, Remote Sensing Features of Mining Area (1) Gravity field features:Bouguer gravity anomaly occurd in Mengyejing deposit area, 5×10-5~ 6×10-5m/s2 amplitude, anomalies caused by halite and potash
Fig.1 Geological map of Mengyejing potash deposit area (5)Remote sensing features: for Mengyejing potash deposit buried deep, from the remote sensing abnormal image interpretation, the effects is not very obvious, but are of certain extent for inferring mining area’s lineaments and circular structures. 5 Comprehensive Information Prospecting Model According to the regional metallogenic model and ore-controlling factors of the Mengyejing potash deposit, as well as geological, geophysical, geochemical exploration, remote sensing and salt springs chemical prospecting signs, combined with the properties of the regional mineralization, Mengyejing potash deposit prediction prospecting model and comprehensive information prospecting model is established(Fig.2). 6 Conclusions (1)Established a comprehensive information prediction prospecting model of Mengyejing-type potash deposits
Online since: July 2011
Authors: Dong Hui Wu, Yu Jun Shi, Jian Feng Ju
PtRu-SiO2-TiO2/C anode electrocatalyst for direct methanol fuel cell
Jianfeng JUa, Donghui WUb, Yujun SHIc
(School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, Jiangsu, P.R.
The adsorption-desorption isotherms filled circle in the relative pressure (P/P0 =0.46), the relative pressure was smaller, indicating that nanometer SiO2-TiO2 is of porous structure [12,13].
Large surface area and porous structure of SiO2-TiO2 is benefit to enhance the activity of SiO2-TiO2 and the dispersion of nanometer PtRu on the composite carrier SiO2-TiO2/C.
Journal of Electroanalytical Chemistry 461 (1-2)(1999),P. 14 [2] Chen SZ, Ye F, Lin WM.
Journal of Physical Chemistry B 102 (49)( 1998),P. 9997 [7] Cao DX, Bergens SH.
The adsorption-desorption isotherms filled circle in the relative pressure (P/P0 =0.46), the relative pressure was smaller, indicating that nanometer SiO2-TiO2 is of porous structure [12,13].
Large surface area and porous structure of SiO2-TiO2 is benefit to enhance the activity of SiO2-TiO2 and the dispersion of nanometer PtRu on the composite carrier SiO2-TiO2/C.
Journal of Electroanalytical Chemistry 461 (1-2)(1999),P. 14 [2] Chen SZ, Ye F, Lin WM.
Journal of Physical Chemistry B 102 (49)( 1998),P. 9997 [7] Cao DX, Bergens SH.
Online since: May 2006
Authors: Takashi Kumagai, Takahisa Anada, Yoshitomo Honda, Keiichi Sasaki, Hidetoshi Shimauchi, Shinji Kamakura, Osamu Suzuki
X-ray diffraction (XRD) and Fourier transform infrared
spectroscopy (FTIR) confirmed that F-HA corresponded well to apatite structure.
Results Characterization of synthetic F-HA XRD and FTIR confirmed that F-HA corresponded well to apatite structure.
(d) Newly formed bone matrix (B) is more abundant, and the regenerated bone surrounds the implanted F-HA (�) and shows lamellar structure.
Katagiri: Surface chemistry and biological responses to synthetic octacalcium phosphate.
Tung: Crystal chemistry of octacalcium phosphate.
Results Characterization of synthetic F-HA XRD and FTIR confirmed that F-HA corresponded well to apatite structure.
(d) Newly formed bone matrix (B) is more abundant, and the regenerated bone surrounds the implanted F-HA (�) and shows lamellar structure.
Katagiri: Surface chemistry and biological responses to synthetic octacalcium phosphate.
Tung: Crystal chemistry of octacalcium phosphate.
Online since: August 2014
Authors: Yi Huang, Feng Miao, Xin You, Chuan Wu Zhang
Abstract. based on Density Functional Theory, we investigated the electronic structures and the optical properties of Sb doped SnO2 with density of 12.5%.including band structure ,the density of state(dos),dielectric function and optical absorption spectrum.
Supercell of Sb-doped SnO2 Results and Discussion Band Structure Figure 2.
Band structure of Sb-doped SnO2 From figure 2 we can see that the doped structure belongs to wind forbidden band direct band semiconductors.
From the band structure we found that the numbers of energy in all band structure are markedly increased than undoped SnO2[17], which had been contributed from Sb 5d and 5s.The fermienergy level moves into conduction band.
Arlinghaus, Journal of Physics and Chemistry of Solids 35 (1974) 931
Supercell of Sb-doped SnO2 Results and Discussion Band Structure Figure 2.
Band structure of Sb-doped SnO2 From figure 2 we can see that the doped structure belongs to wind forbidden band direct band semiconductors.
From the band structure we found that the numbers of energy in all band structure are markedly increased than undoped SnO2[17], which had been contributed from Sb 5d and 5s.The fermienergy level moves into conduction band.
Arlinghaus, Journal of Physics and Chemistry of Solids 35 (1974) 931
Online since: October 2009
Authors: Hirota Ken, Kato Masaki, Tetsuya Imamaura, Miho Fukatsu
Crossover from Metallic to Semiconducting in Pb2-xLnxRu2O7-δδδδ
(Ln = Eu, Sm) Compounds with Pyrochlore Structure
Masaki Kato1, a, Tetsuya Imamaura
1, Miho Fukatsu
1 and Ken Hirota1, b
1
Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering,
Doshisha University, Tatara-Miyakodani 1-3, Kyotanabe, Kyoto 610-0321, Japan
a
makato@mail.doshisha.ac.jp, bkhirota@mail.doshisha.ac.jp
Keywords: Pyrochlore structure, Metal-insulator transition, Strongly correlated electron system,
Ruthenate, magnetic susceptibility, electric resistivity
Abstract.
We study the synthesis and physical properties of Pb2-xLnxRu2O7-δ (Ln = Sm, Eu) compounds with pyrochlore structure.
All the sample is successfully indexed by the pyrochlore structure.
Hence, these MI transitions can be attributed to strongly correlated electrons possibly induced by the spin frustration and/or the change of Ru 4d band structure.
Further investigations using NMR techniques will be reported elsewhere in order to clarify the relationship among electron correlation, crystal structure and exotic behaviors in pyrochlore ruthenates.
We study the synthesis and physical properties of Pb2-xLnxRu2O7-δ (Ln = Sm, Eu) compounds with pyrochlore structure.
All the sample is successfully indexed by the pyrochlore structure.
Hence, these MI transitions can be attributed to strongly correlated electrons possibly induced by the spin frustration and/or the change of Ru 4d band structure.
Further investigations using NMR techniques will be reported elsewhere in order to clarify the relationship among electron correlation, crystal structure and exotic behaviors in pyrochlore ruthenates.
Structure Evolution of the Atomized Powders of Fe-25Cr-3.9C Alloy with Addition of Ni and B Elements
Online since: May 2011
Authors: Chang Jiang Song, Yuan Yi Guo, Liang Zhu, Ke Feng Li, Min Yang, Qi Jie Zhai
Based on the study of structure evolution of atomized powders of Fe-25Cr-3.9C alloy, this paper investigated the structure evolution of the atomized powders of Fe-25Cr-3.9C alloy with addition of Ni and B elements.
At last, a relative study between two alloys was made, and the structure formation of atomized powders was discussed.
The experimental results suggest that the structure formation diagram of the eutectic alloy is as shown in Fig.7.
Eutectic structure α α β β Composition Liquid Temperature Eutectic composition A B Small powder Large powder Fig.7 Structure formation diagram of the eutectic alloy.
[4] S.D.Carpenter, D.Carpenter and J.T.Pearce: Materials Chemistry and Physics Vol.85 (2004), p.32
At last, a relative study between two alloys was made, and the structure formation of atomized powders was discussed.
The experimental results suggest that the structure formation diagram of the eutectic alloy is as shown in Fig.7.
Eutectic structure α α β β Composition Liquid Temperature Eutectic composition A B Small powder Large powder Fig.7 Structure formation diagram of the eutectic alloy.
[4] S.D.Carpenter, D.Carpenter and J.T.Pearce: Materials Chemistry and Physics Vol.85 (2004), p.32
Online since: February 2011
Authors: Sheng Kui Zhong, You Wang, Chang Jiu Liu, Yan Wei Li, Yan Hong Li
XRD studies showed that the Y-doped SnO2/C has the same layered structure as the undoped SnO2/C.
Introduction Research on anode materials of lithium-ion battery mainly concentrated on the transition metal oxides with layered structure such as SnO2[1-4], CoO, CuO[5], SnCu[6], SnNi[7], SnCo[8,9] and their derivatives.
It illustrates that all samples were pure single phase with the perovskite structure. and no other phases were detected in the XRD patterns ,indicating that Y was thoroughly doped into the crystal lattice of SnO2 .Therefore doping does not change the perovskite structure of the SnO2 samples.
XRD studies show that Y-doped SnO2/C has the same layered structure as the undoped sample.
Chemistry B, 2004, 108:5547-5551 [6] Tamura N, Ohshita R, Fujimoto M, et al: J Power Sources, 2002, 107(1):48-55
Introduction Research on anode materials of lithium-ion battery mainly concentrated on the transition metal oxides with layered structure such as SnO2[1-4], CoO, CuO[5], SnCu[6], SnNi[7], SnCo[8,9] and their derivatives.
It illustrates that all samples were pure single phase with the perovskite structure. and no other phases were detected in the XRD patterns ,indicating that Y was thoroughly doped into the crystal lattice of SnO2 .Therefore doping does not change the perovskite structure of the SnO2 samples.
XRD studies show that Y-doped SnO2/C has the same layered structure as the undoped sample.
Chemistry B, 2004, 108:5547-5551 [6] Tamura N, Ohshita R, Fujimoto M, et al: J Power Sources, 2002, 107(1):48-55
Online since: April 2014
Authors: F. Pınar Gokdemir, Ece Yuzbasioglu, A. Evrim Saatci, Orhan Ozdemir, Kubilay Kutlu
Due to such impact of erbium on structure, granule size of the films, determined by AFM, increased yielding more space for intercalation of ion in host materials and monitored through cyclic voltammetry measurements.
However, keep in mind that Er local structure was determined by the Ti-O arrangement in anatase TiO2 whereas in rutile TiO2, Er-O chemical property rather than the Ti-O arrangement [7].
Due to the impact of Er on host material structure, granule size of the films increased (UV-Vis. and AFM measurements) yielding more space for intercalation of ion in host materials.
Murafa, Materials Chemistry and Physics 114 (2009), p.217
Joshi, Indian Journal of Chemistry A, 48 2 (2009), p.161
However, keep in mind that Er local structure was determined by the Ti-O arrangement in anatase TiO2 whereas in rutile TiO2, Er-O chemical property rather than the Ti-O arrangement [7].
Due to the impact of Er on host material structure, granule size of the films increased (UV-Vis. and AFM measurements) yielding more space for intercalation of ion in host materials.
Murafa, Materials Chemistry and Physics 114 (2009), p.217
Joshi, Indian Journal of Chemistry A, 48 2 (2009), p.161