A Investigation on the Surface State of La1-xMx CoO3(M-Ca,Sr) Perovskite Oxides by XPS

Abstract

Abstract: Aseries of La_1-xM_xCoO₃ (M = Ca,Sr) perovskite oxides have been synthesized and the change of surface states after the substitution of La³⁺ ion in LaCoO₃ with Ca²⁺ or Sr²⁺ ion have been investigated by XPS technique. It is shown that the percentage of adsorbed oxygen obtained in the peak fitting of O_1s spectra is regularly varied with the substitution content x. The peak fitting of Ca_2p, and Sr_3d spectra has been performed and Ca(2) and Sr(2) may be assigned to the situation that there exist vacancies of oxygen surrounding them. The relationship between the percentage of Ca(2) or Sr (2) and the percentage of absorbed oxygen can be adoptd to explain the surface state change after substitution. Therefore, we reasonably assume that the substitution of Sr²⁺ causes an increase in vacancy of oxygen, however, the substitution of Ca²⁺ causes an opposite result.

Key words: XPS, Perovskite oxide, Oxygen anion vacancies

TrendMD:

Wei Quan, Cui Wei, Long Xiang, Xu Yue . A Investigation on the Surface State of La_1-xM_x CoO₃(M-Ca,Sr) Perovskite Oxides by XPS[J]. Chem. J. Chinese Universities, 1990, 11(11): 1227.

[1]	ZHANG Yong, FU Mao, WU Deli, ZHANG Yalei. Removal Performance and Mechanism of Selenite with the Highly Active Ferrous Hydroxyl Complex FHC(Cl^-)^† [J]. Chem. J. Chinese Universities, 2017, 38(5): 830.
[2]	SUN Er-Jun, WANG Dong, CHENG Xiu-Li, SHI Yu-Hua, SHI Tong-Shun. Preparation and Properties of 5,10,15,20-Tetra(4-myristylimidophenyl) Porphyrin and Its Zn and Mn Complexes [J]. Chem. J. Chinese Universities, 2007, 28(7): 1208.
[3]	ZHANG Ya-Nan^1,2, XIA Fan³, WANG Nü³, FENG Lin¹. Preparation and Characterization of Large-area Superhydrophobic Nanostructured Carbon Films [J]. Chem. J. Chinese Universities, 2007, 28(3): 568.
[4]	XIE Fu-Zhong¹, HU Hua-Rong¹, QIAO Ming-Hua¹, YAN Shi-Run¹, FAN Kang-Nian¹, LEI Hao², TAN Da-Li², BAO Xin-He², ZONG Bao-Ning³, ZHANG Xiao-Xin³. XPS Study on Adsorptive Desulfurization of Thiophene over Rapidly Quenched Skeletal Ni [J]. Chem. J. Chinese Universities, 2006, 27(9): 1729.
[5]	LI Ai-Ze, JIN Yu-Hui, LIU Bai-Jun, JIANG Zhen-Hua. Effect of Heat-treatment Atmosphere on the Near-infrared Absorption of the Fluorinated Poly(aryl ether) [J]. Chem. J. Chinese Universities, 2005, 26(6): 1177.
[6]	LI Hui, SHEN Fei, WU Chi-Fei. Preparation and Characterization of Novel NBR/PVC Alloy Crosslinked by Coordinate Bonds [J]. Chem. J. Chinese Universities, 2005, 26(2): 370.
[7]	LI Xiao-Ling, XU Wei-Qing, JIA Hui-Ying, WANG Xu, ZHAO Bing, LI Bo-Fu . UV-Vis and XPS Spectroccopic Studies on Self-assembled Metalloporphrin Films [J]. Chem. J. Chinese Universities, 2004, 25(11): 2131.
[8]	LI Wan-Cheng, DU Guo-Tong, YANG Xiao-Tian, LIU Bo-Yang, ZHANG Yuan-Tao, ZHAO Bai-Jun, JIANG Xiu-Ying . XPS Valence Band of ZnO Films [J]. Chem. J. Chinese Universities, 2004, 25(11): 2078.
[9]	YU Ji, CAN Hong-Yu, HE Yi, YUAN Juan, CHEN Huan-Lin. Studies on PVDF Hollow Fiber Affinity Membrane for Separation of γ-Globulin from Human Plasma(Ⅰ) -Preparation of PVDF Hollow Fiber Affinity Membrane and Its Adsorption Properties [J]. Chem. J. Chinese Universities, 2003, 24(5): 935.
[10]	DAI Wei-Lin, CAO Yong, FAN Kang-Nian, DENG Jing-Fa . In situ XPS Studies on the Anti-oxidation Effects of Nano-sized Ni-Co-B Amorphous Alloy [J]. Chem. J. Chinese Universities, 2003, 24(3): 473.
[11]	LI Li-Na, CHEN Yao-Qiang, GONG Mao-Chu, XIANG Yun . Catalytic Activity of Fe₂O₃/YSZ-γ-Al₂O₃for Methane Combustion [J]. Chem. J. Chinese Universities, 2003, 24(12): 2235.
[12]	SUN Bao-Yun, GU Zhen-Nan . Synthesis and Characterization of Water-soluble Metallofullerene Derivatives [J]. Chem. J. Chinese Universities, 2003, 24(10): 1747.
[13]	WU Xue-Yan, YOU Hong-Peng, ZENG Xiao-Qing, HONG Guang-Yan, KIM Chang-Hong, PYUN Chong-Hong, YU Byung-Yong, PARK Cheol-Hee. The Preparation of (La,Gd)PO₄:RE³⁺ (RE=Eu, Tb) by Co-precipitation Method and Their VUV Spectroscopic Properties [J]. Chem. J. Chinese Universities, 2003, 24(1): 1.
[14]	SONG Wei-Jie, ZHU Yong-Fa, CAO Li-Li, LI Zhan-Ping, WANG Dao-Yuan, Huang-Wei . Studies on Interface Structure of BBDMS-PPV/ITO System Using ADXPS Technique [J]. Chem. J. Chinese Universities, 2001, 22(5): 836.
[15]	LIU QingSheng, WANG ZhenLü, YU JianFeng, YANG PiaoPing, WANG GuoJia, YANG HongMao, ZHENG DaFang, WU TongHao. Investigation of Surface Structures of Supported ZnO/SiO₂ and ZnO-SiO₂ Sol-gel Catalysts [J]. Chem. J. Chinese Universities, 2001, 22(12): 2091.

A Investigation on the Surface State of La_1-xM_x CoO₃(M-Ca,Sr) Perovskite Oxides by XPS

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments