A material containing Mo and V shows Mo5+ / Mo6+ and V5+/V6+ couples. How can i confirmed the presence of redox couple in the materials?
You can perform UVvis analysis, each specie has commonly one specific signal...
I can get all the phases. But how could I know that there exist a redox couple
V4+ +O- ------>V5+ +O2- and Mo6+ +O2- ---------> Mo5+ +O-
This material is one oxide or solution with the metals ? Please, What proprieties of the material?
Its a solid material
Maybe is possible analysis by electrochemistry or titulation pontenciometric, I go find one method in literature. And the methods then using complexation, it involves a redox reaction. You need the maximum precision the quanties metal in solid?
I have done a reaction whose optimum time is 10 h. So at what time I should stop the reaction and separate the catalyst and then analyze. When the reaction completes 20 to 30% or at 5 h?
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I have synthesized Pd doped Vanadium phosphates. One is Pd(0)-VPO and another is Pd(II)-VPO. If the Pd in Pd(0)-VPO is neutral then there will be no interaction, then how does it lie in the bulk...
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I have synthesized WO3 promoted vanadium phosphate, but I did not get any peak for WO3 in XRD. This may be due to the amorphous nature of WO3 or it was well dispersed or both. Could anyone make a...
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I have synthesized WO3 promoted vanadium phosphate. How can it be proven from UV-vis analysis that the WO3 remains as W, WO3, WOx, WO3 or xH2O? Can anybody help me in this regard or suggest any...
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I have synthesized WO3 based materials. The materials show two peaks at lower and higher temperature. I assume that lower temp. peak is for Bronsted acid sites and higher temp. peak is for Lewis...
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As the X-ray fall on the same material what really happens?
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Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...
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