Hydrotalcite-like MgMnTi non-precious-metal catalyst for solvent-free selective oxidation of alcohols

Photoelectrochemical Catalysis toward Selective Anaerobic Oxidation of Alcohols

“…The following advantages are expected in this new reaction system:f irstly,P EC facilitates the charges eparation owingt ot he introductiono f ab ias, giving rise to high catalytic efficiency;s econdly,h ighlyactiveo xygen or hydrogen species originating from PEC water splitting serves as clean and cost-effective oxidant or reducing agent, without the consumption of noxiouso rganic counterparts.I na ddition, this PEC water-splitting/organic-synthesis coupling process may occur at normalp ressure andt emperature in aqueousm edia, so as to achieve ag reen synthesis pathway.The transformation of alcohols to corresponding aldehydes in liquid-phase oxidation has been well-developed previously by using variousc atalysts, including noble metal catalysts (e.g., Pd, Au) [31][32][33][34] and non-precious-metalc atalysts. [35,36] Differently, here we report photoelectrochemical oxidation of alcohols in the photoanode with H 2 generated in the cathode, which couples PEC water splitting with selectiveo xidation reaction of organic molecules. To achievet his PEC transformationp rocess, as ophisticated photoanode was fabricated by depositing electron capture layer (graphiticc arbon) on the surface of TiO 2 nanowires (NWs) array.T he resulting TiO 2 /C photoanode exhibits ah igh activity for the oxidation of benzyl alcohol (BA), givingareaction rate of 0.048 mmol h À1 ( % 16.4 times larger [a] R.…”

“…The transformation of alcohols to corresponding aldehydes in liquid-phase oxidation has been well-developed previously by using variousc atalysts, including noble metal catalysts (e.g., Pd, Au) [31][32][33][34] and non-precious-metalc atalysts. [35,36] Differently, here we report photoelectrochemical oxidation of alcohols in the photoanode with H 2 generated in the cathode, which couples PEC water splitting with selectiveo xidation reaction of organic molecules. To achievet his PEC transformationp rocess, as ophisticated photoanode was fabricated by depositing electron capture layer (graphiticc arbon) on the surface of TiO 2 nanowires (NWs) array.T he resulting TiO 2 /C photoanode exhibits ah igh activity for the oxidation of benzyl alcohol (BA), givingareaction rate of 0.048 mmol h À1 ( % 16.4 times larger than that of pristine photocatalytic process) and aselectivity of > 99 %f or benzaldehyde.Af urther introductiono ft he hole-trapping agent Co 3 O 4 (denoted as TiO 2 /C/Co 3 O 4 photoanode) demonstrates ah igh performance toward PEC water splitting other than BA oxidation.…”

Tuning the Synthesis of Manganese Oxides Nanoparticles for Efficient Oxidation of Benzyl Alcohol

“…7), which can be ascribed to the loss of lattice oxygen O 2− , very strong chemisorbed O − , or reticular oxygen (known as β-oxygen) corresponding to different Mn–O bond strengths [8, 29–32]. For S3-600, a new and relatively strong desorption peak was observed at 590 °C due to the desorption of active chemisorbed oxygen (species ) on the surface with the remarkably enhanced oxygen mobility [7, 33]. Only a slightly small peak at 800 °C was observed for S3-600.…”

Catalytic Aerobic Oxidation of C(sp3)−H Bonds

“…[84] Ther esults for 1%Au@SiO 2 and benchmark SiO 2 are listed in Table 3. [86] Theoxidation of alcohols is afrequently used reaction to test the potential of new heterogeneous catalysts.I ts importance resulted in many reports covering basically all areas of solid materials such as polyoxometalates, [87] metal oxides, [88] clays [89] and deposited transition metals [90] as catalysts.P erovskites are porous mineral structures with ageneral formula ABO 3 ,Aand Bbeing, respectively asmall high-charged and alarge low-charged cation. In terms of the preparation method it was found that the procedure which provides the smallest particles (sol-immobilization) gave the best results.I ng eneral, smaller rings are more reactive towards oxidation, hence higher temperatures were used for the larger ones.T his effect is caused by the degree of reorganization required to form ap lanar allyl radical and is independent of the catalyst system.…”