高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (6): 928.

• 论文 • 上一篇    下一篇

过渡金属复合氧化物电子组态与表面光伏响应的关系(Ⅰ)──M(Ⅱ)铁酸盐(M=Cu,Co,Ni)的研究

李葵英, 王德军, 于剑锋, 吴通好, 孙家鍾, 李铁津   

  1. 吉林大学化学系, 长春, 130023
  • 收稿日期:1996-04-08 出版日期:1997-06-24 发布日期:1997-06-24
  • 通讯作者: 王德军.
  • 作者简介:李葵英, 女, 42岁, 副教授, 齐齐哈尔轻工学院化工系访问学者.
  • 基金资助:

    国家自然科学基金

The Relation of Electronic Configuration of Transition Metal Complex Oxides to the Surface Photovoltaic Response(Ⅰ)──The Studies of M(Ⅱ)Fe2O4(M=Cu, Co, Ni)

LI Kui-Ying, WANG De-Jun, YU Jian-Feng, WU Tong-Hao, SUN Jia-Zhong, LI Tie-Jin   

  1. Department of Chemistry, Jilin University, Changchun, 130023
  • Received:1996-04-08 Online:1997-06-24 Published:1997-06-24

摘要: 利用表面光电压谱及场诱导表面光电压谱研究了部分过渡金属复合氧化物的电子组态与其光伏响应的关系.结果表明,在过渡金属M(M=Cu,Co,Ni)铁酸盐系列样品中,开壳层的Cu(Ⅱ)(铁酸盐)和CO(Ⅱ)(铁酸盐)的电荷转移跃迁(CT)具有双激发态的成分,其中含有较强的低能电子跃迁;与它们相比,闭壳层的Ni(Ⅱ)铁酸盐的CT跃迁则需要较大的能量.三者的FISPS证实了它们具有不同的CT跃迁性质,为其催化反应机理研究提供了微观信息.

关键词: 过渡金属氧化物, 表面光电压谱, 场诱导表面光电压谱

Abstract: The relations between the photovoltaic response of transition metal complex ox-ides and their electronic configuration were studied by the surface photovoltage spectroscopy (SPS) and field induced surface photovoltage spectroscopy(FISPS) techniques. The results showed that the complex oxide with open-shell Cu(Ⅱ) has more intense low-energy CTtran-sition; Cu(Ⅱ) complex oxide and low-spin d7 Co(Ⅱ) complex oxide has composition of dou-blet exited states; Whereas CTtransition of closed-she1l d8 Ni (Ⅱ) needs larger energy-These conclusions were confirmed by the test of the reaction catalytical activity-

Key words: Transition metal oxide, SPS, FISPS

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