Acta Chimica Sinica ›› 2002, Vol. 60 ›› Issue (5): 815-819. Previous Articles     Next Articles

Original Articles

O_2存在下NO在固体电解质电池上分解机理

王新平;赵沁;蔡天锡   

  1. 大连理工大学化工学院,大连(116012)
  • 发布日期:2002-05-15

The Mechanism of NO Decomposition on the Solid Electrolyte Cell in the Presence of O_2

Wang Xinping;Zhao Qin;Cai Tianxi   

  1. State Key Laboratory of Fine Chemicals, Dalian University of Technology,Dalian(116012)
  • Published:2002-05-15

The properties of RuO_2 |YSZ| Pd cell and Pd |YSZ| for NO decomposition in the presence of O_2 were studied. The results have proved that, the NO was decomposed via the electrocatalysis mechanism other than electrolysis mechanism at the reaction temperature between 650 ~ 700 ℃ on the both cells at applied voltages in the range of 1 ~ 4 V. Namely, the O~(2-) produced from NO decomposition and ionization of O_2 on the surface of the cathode was transported through YSZ to the anode by DC voltage and then given off in the form of O_2 so as to maintain the active states of the cathode and the catalyst being coated on the cathode. On the Pd |YSZ| Pd cell, the palladium metal surface is the active site for NO decomposition and on the RuO_2 |Pd|YSZ| Pd cell, the partially reduced RuO_x (0 < x < 2) is the main active site for NO decomposition. In the reaction temperature range of 650 ~ 700 ℃, NO is selectively decomposed in the presence of O_2 at suitable voltages between 0 V and 4 V on the RuO_2 |Pd|YSZ| Pd cell.

Key words: ELECTRO-CATALYSIS, NO, DECOMPOSITION, ELECTROLYTE, RUTHENIUM OXIDE, PLATINUM, ELECTROLYSIS

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