The catalytic oxidation of formic acid and the impact of different platinized semi conductor support under pre-illuminated and illuminated photocatalysis

    review existing literature . The nominated semi-conductor supports are:

    Titanium Oxide
    Silicon Oxide
    Zinc Oxide
    Tungsten Oxide
    The point of this research is to understand the effect on each of these on the nominated formic acid oxidation when impregnated with 25p (1atom%) Platinum.
    You will find very little literature on SiO2 as a photocatalyst because it is an insulator.
    The reason we are considering SiO2 is because it is an insulator so no photocatalytic effect should be present so it represents a good comparison.
    WO3 and ZnO are not as favoured as TiO2 but there is still considerable literature available on these two semiconductors.
    We are considering ZnO as it has a similar band-gap to TiO2 (as well as band potentials) so it represents a variation in the metal oxide support type.

    We are considering WO3 as it has a narrower band-gap so will represent a visible-light-activated photocatalyst.

    You should be able to find literature on photocatalysis by both these oxides (including instances where they have been platinized) but you won’t find anything on dark catalysis by these oxides.

    Furthermore i had the following table of contents in my head .

    Please review it and if you think it would be reasonable.

    1)Introduction
    2)Photocatalysis ( Mechanism of oxidation under photocatalytic condition)
    3) Titanium Oxide (current uses and potential for catalysis) 3.1 ) Titanium Oxide structure(rutile,anatase ,brookite) ; the polymorphs and effect on reaction rate (don’t spend too much time on this as we are not considering the effect of polymorphs) 3.2 ) Band Gap 4) Silicon Oxide (same research relevant to SiO2 as for TiO2) (I would put this after ZnO and WO3 sections as there won’t be much photocatalytic literature involving this as a support. Maybe could mention it is a common catalyst support (with a couple of examples where it is used with Pt) 4.1) Silicon Oxide Structure ; (same research relevant to SiO2 as for TiO2_ 4.2) Band Gap (this is an insulator so its band-gap will be large > 5eV) 5) Zinc Oxide (same research relevant to ZnO as for TiO2) 5.1) Zinc Oxide Structure(same research relevant to ZnO as for TiO2) 5.2) Band Gap 6) Tungsten oxide( as above) 6.1) Tungsten oxide Structure(As above) 6.2) Band Gap 7) Platnizing Semi conductor( Why do we do this and what effects does it hold for photocatalysis and a general introduction) ( what impact does putting Pt deposits on the semiconductor surface have on photocatalysis and how does it work. You may also want to have a section on Pt as a catalyst – perhaps including some examples where it is used to oxidise organics (e.g. catalytic wet air oxidation (CWAO) or its role in the oxygen reduction reaction (ORR)) 8) Methods of Platinizing (I wouldn’t spend too much time on this as we are will just be using impregnation. Perhaps you can include a bit of detail on the methods for loading Pt on metal oxide supports (e.g. impregnation, photodeposition) and use it to justify why we are going with impregnation. There would be a couple of papers out there which compare the different loading methods on catalytic/photocatalytic performance. We primary reason are going with impregnation because we cannot use photodeposition to load Pt onto the SiO2. 9) Depositing characteristics (size, oxidation state)

    10) Dark Catalysis (This is what the project is really about so having it at the end would be a good way to lead into the research plan (and thesis later on). This for me is the important literature you MUST review and write about in detail, compare expected results for all the metal oxides in consideration and how the illuminated and nonilluminated reactions with regards to formic acid oxidation take place))

    12) Formic Acid oxidation

    12) Summary

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