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Particle size effect specific-oxygen reduction activity

One factor that may be important, but not systematically investigated, is the influence of the Pt electrocatalyst-support interactions on the electrocatalytic activity for O2 reduction. In Figure 14, an attempt to incorporate the pHzpc as a qualitative measure of the importance of carbon surface chemistry and metal-support interaction on the electrocatalytic activity of Pt is reported. The trend of the data in Figure 14 suggests that the specific activity for oxygen reduction increases as the pHzpc of the surface becomes more basic this effect may be related to the parallel increase of the particle size with the pHzpc of the catalyst. At this stage, one... [Pg.651]

Nanostructured LaNiOs was prepared by co-precipitation under ultrasonic radiation [120], Using various characterization methods and evaluation of catalytic activity, the effects of ultrasound on the structural properties and catalytic activity of LaNiOs were studied. The TEM showed that the ultrasound could cause a decrease in the particle size. The average particle size of LaNiOs prepared by sonochemistry is 20 nm. The specific surface area of LaNiOs is 11.27 m g h Ultrasound could lead to increased surface oxide content and surface crystal oxygen vacancies. The TPR result showed that the LaNi03 prepared by sonochemistry has a lower reduction temperature and a higher ratio of surface oxygen to crystal oxygen. The evaluation of catalytic activity showed that ultrasound could increase the catalytic activity of LaNiOs for NO decomposition. [Pg.143]


See other pages where Particle size effect specific-oxygen reduction activity is mentioned: [Pg.1490]    [Pg.379]    [Pg.567]    [Pg.18]    [Pg.382]    [Pg.420]    [Pg.537]    [Pg.204]    [Pg.541]    [Pg.453]    [Pg.24]    [Pg.257]    [Pg.573]    [Pg.614]    [Pg.534]    [Pg.525]    [Pg.659]    [Pg.95]    [Pg.322]    [Pg.487]    [Pg.786]   
See also in sourсe #XX -- [ Pg.90 , Pg.489 ]




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Activated oxygen

Active oxygen

Active particles

Activity reduction

Oxygen activation

Oxygen activators

Oxygen effect

Oxygen reduction

Oxygen, reductive activation

Oxygenates reduction

Particle effects

Particle size effect

Particle size effective

Particle size reduction

Particles reduction

Reductants, effectiveness

Reduction activated

Reduction activation

Reduction oxygenation

Reduction particle size effects

Reductive activation

Reductive oxygenation

Size reduction

Specific activation

Specific activity

Specific effects

Specification activity

Specification effective

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