TiO2,CoS and SnO2 respectively by itself is inactive for the reduction of SO2 or/and NO by CO;however,we discovered that both TiO2- CoS （1:1 mass ratio） and TiO2- SnO2 （1:1 mass ratio） composite compounds are very...TiO2,CoS and SnO2 respectively by itself is inactive for the reduction of SO2 or/and NO by CO;however,we discovered that both TiO2- CoS （1:1 mass ratio） and TiO2- SnO2 （1:1 mass ratio） composite compounds are very active for such reactions,at 300－ 350℃ ,the conversion of SO2 to S,NO to N2 are over 90％ ,and the selectivity towards S or N2 are over 95％ .These mean that there are synergism effects between TiO2 and CoS,TiO2 and SnO2.It was confirmed by XRD characterization that TiO2 and CoO,TiO2 and SnO2 transform to rutile after calcinations at 500℃ ,however,individual TiO2（anatase） can only transform to rutile up to 900℃ .Therefore ,it is suggested that the synergism effects must be related to these composites comcound which exist as rutile structure.The study of the reaction mechanism and model of active phase are underway.展开更多
The properties of La0.45Ce0.2Nd0.2Pr0.15Ni3.55Co0.75 alloy electrode com-pared with those of La0.65Nd0.2Pr0.15Ni3.55Co0.75Mn0.4Al0.3 have been investigated, in addition,the effects of Ce have been disscussed. The La0....The properties of La0.45Ce0.2Nd0.2Pr0.15Ni3.55Co0.75 alloy electrode com-pared with those of La0.65Nd0.2Pr0.15Ni3.55Co0.75Mn0.4Al0.3 have been investigated, in addition,the effects of Ce have been disscussed. The La0.65Nd0.2Pr0.15Ni3.55Co0.75Mn0.4 alloy electrodeshows a high discharge capacity and rate capability but low cycling stability. With partial sub-stitution for La by Ce, i.e. the La0.45Ce0.2Nd0.2Pr0.15Ni3.55Co0.75 alloy electrode showsa good cycling stability, which decays only 12% of maximum capacity （310 mA.h.g-1） after 300cycles.展开更多
文摘TiO2,CoS and SnO2 respectively by itself is inactive for the reduction of SO2 or/and NO by CO;however,we discovered that both TiO2- CoS （1:1 mass ratio） and TiO2- SnO2 （1:1 mass ratio） composite compounds are very active for such reactions,at 300－ 350℃ ,the conversion of SO2 to S,NO to N2 are over 90％ ,and the selectivity towards S or N2 are over 95％ .These mean that there are synergism effects between TiO2 and CoS,TiO2 and SnO2.It was confirmed by XRD characterization that TiO2 and CoO,TiO2 and SnO2 transform to rutile after calcinations at 500℃ ,however,individual TiO2（anatase） can only transform to rutile up to 900℃ .Therefore ,it is suggested that the synergism effects must be related to these composites comcound which exist as rutile structure.The study of the reaction mechanism and model of active phase are underway.
文摘The properties of La0.45Ce0.2Nd0.2Pr0.15Ni3.55Co0.75 alloy electrode com-pared with those of La0.65Nd0.2Pr0.15Ni3.55Co0.75Mn0.4Al0.3 have been investigated, in addition,the effects of Ce have been disscussed. The La0.65Nd0.2Pr0.15Ni3.55Co0.75Mn0.4 alloy electrodeshows a high discharge capacity and rate capability but low cycling stability. With partial sub-stitution for La by Ce, i.e. the La0.45Ce0.2Nd0.2Pr0.15Ni3.55Co0.75 alloy electrode showsa good cycling stability, which decays only 12% of maximum capacity （310 mA.h.g-1） after 300cycles.
