Coordinately unsaturated O2c–Ti5c–O2c sites promote the reactivity of Pt/TiO2 catalysts in the solvent-free oxidation of n-octanol

Yang, Pengfei; Douthwaite, Mark; Pan, Jiahao; Zheng, Lirong; Hong, Song; Morgan, David; Gao, Mingyu; Li, Dianqing; Feng, Junting; Hutchings, Graham J.

doi:10.1039/d1cy00686j

Cited by 9 publications

(4 citation statements)

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“…The increase in the concentration of aldehydes during frozen storage, mainly at 45 d, may indicate an increase in oxidative reactions. Added to this, the decrease in hexanal, octanal and nonanal, mainly at 90 d, may indicate the oxidation of these compounds, or their interaction with other compounds produced by oxidative reactions ( Yang et al, 2021 ; Grebenteuch et al, 2021 ).…”

Section: Resultsmentioning

confidence: 99%

Oxidative stability of white striping chicken breasts: effect of cold storage and heat treatments

et al. 2023

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Section: Resultsmentioning

confidence: 99%

Oxidative stability of white striping chicken breasts: effect of cold storage and heat treatments

et al. 2023

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“…To investigate why these catalysts performed differently in the reaction, the series of catalysts were probed by XPS and CO-DRIFTS. Previously, Yang et al 43 proposed that the electron density in TiO 2 supported Pt particles significantly influenced their performance in the oxidation of 1-octanol. The XPS Pt4f region for each of the catalysts is presented in Figure 3(a).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Investigating Catalytic Properties Which Influence Dehydration and Oxidative Dehydrogenation in Aerobic Glycerol Oxidation over Pt/TiO₂

et al. 2022

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The use of heterogeneous catalysts to convert glycerol into lactic acid has been extensively investigated in recent years. Several different strategies have been employed, but importantly, the highest production rates of lactic acid are achieved through aerobic oxidation under alkaline conditions. Despite the progress made in this area, insight into how the catalytic properties influence the selectivity of the competing pathways, oxidative dehydrogenation and dehydration, remains limited. Developing a deeper understanding is therefore critical, if process commercialization is to be realized. Using a model Pt/TiO2 catalyst, we set out to investigate how the supported metal particle size and support phase influenced the selectivity of these two pathways. Both these parameters have a profound effect on the reaction selectivity. Using a range of characterization techniques and through adopting a systematic approach to experimental design, important observations were made. Both pathways are first instigated through the oxidative dehydrogenation of glycerol, leading to the formation of glyceraldehyde or dihydroxyacetone. If these intermediates desorb, they rapidly undergo dehydration through a reaction with the homogeneous base in solution. Based on the experimental evidence we therefore propose that selectivity to lactic acid is influenced by surface residence time.

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“…J 2021, 4 FOR PEER REVIEW 4 In addition, different atomic arrangements, surface energies and electronic structures associated with each family of TiO2 facets drives selective migration of charge carriers towards different exposed facets. Generally, it is considered that the coordinately unsaturated O2c-Ti5c-O2c bond on TiO2-001 surface is more selective for the oxidation of adsorbed species whereas {010} facets show selectivity for the reduction reactions (Figure 3a,b) [45,46]. Hence, ideal spatial separation on these 001 (oxidation) and {010} (reduction) sites on the TiO2 nanoparticle reduces the recombination of photogenerated charge carriers, thus increasing the photocatalytic efficiency.…”

Section: Charge Separationmentioning

confidence: 99%

Photocatalysis and Li-Ion Battery Applications of {001} Faceted Anatase TiO2-Based Composites

Bokare

Erogbogbo

2021

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Anatase TiO2 are the most widely used photocatalysts because of their unique electronic, optical and catalytic properties. Surface chemistry plays a very important role in the various applications of anatase TiO2 especially in the catalysis, photocatalysis, energy conversion and energy storage. Control of the surface structure by crystal facet engineering has become an important strategy for tuning and optimizing the physicochemical properties of TiO2. For anatase TiO2, the {001} crystal facets are the most reactive because they exhibit unique surface characteristics such as visible light responsiveness, dissociative adsorption, efficient charge separation capabilities and photocatalytic selectivity. In this review, a concise survey of the literature in the field of {001} dominated anatase TiO2 crystals and their composites is presented. To begin, the existing strategies for the synthesis of {001} dominated anatase TiO2 and their composites are discussed. These synthesis strategies include both fluorine-mediated and fluorine-free synthesis routes. Then, a detailed account of the effect of {001} facets on the physicochemical properties of TiO2 and their composites are reviewed, with a particular focus on photocatalysis and Li-ion batteries applications. Finally, an outlook is given on future strategies discussing the remaining challenges for the development of {001} dominated TiO2 nanomaterials and their potential applications.

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Coordinately unsaturated O_2c–Ti_5c–O_2c sites promote the reactivity of Pt/TiO₂ catalysts in the solvent-free oxidation of n-octanol

Abstract: A series of TiO2 anatase materials were synthesized with varying proportions of exposed (101) and (001) facets. Pt was subsequently impregnated onto these materials, which were then exposed to either...

Cited by 9 publications

References 52 publications

Oxidative stability of white striping chicken breasts: effect of cold storage and heat treatments

Oxidative stability of white striping chicken breasts: effect of cold storage and heat treatments

Investigating Catalytic Properties Which Influence Dehydration and Oxidative Dehydrogenation in Aerobic Glycerol Oxidation over Pt/TiO₂

Photocatalysis and Li-Ion Battery Applications of {001} Faceted Anatase TiO2-Based Composites

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Coordinately unsaturated O2c–Ti5c–O2c sites promote the reactivity of Pt/TiO2 catalysts in the solvent-free oxidation of n-octanol

Abstract: A series of TiO2 anatase materials were synthesized with varying proportions of exposed (101) and (001) facets. Pt was subsequently impregnated onto these materials, which were then exposed to either...

Cited by 9 publications

References 52 publications

Oxidative stability of white striping chicken breasts: effect of cold storage and heat treatments

Oxidative stability of white striping chicken breasts: effect of cold storage and heat treatments

Investigating Catalytic Properties Which Influence Dehydration and Oxidative Dehydrogenation in Aerobic Glycerol Oxidation over Pt/TiO2

Photocatalysis and Li-Ion Battery Applications of {001} Faceted Anatase TiO2-Based Composites

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Product

Resources

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Coordinately unsaturated O_2c–Ti_5c–O_2c sites promote the reactivity of Pt/TiO₂ catalysts in the solvent-free oxidation of n-octanol

Investigating Catalytic Properties Which Influence Dehydration and Oxidative Dehydrogenation in Aerobic Glycerol Oxidation over Pt/TiO₂