The influence of non-stoichiometric species of V/TiO2 catalysts on selective catalytic reduction at low temperature

Choi, Sang Hyun; Cho, Sung Pill; Lee, Jun Yub; Hong, Sung Ho; Hong, Sung Chang; Hong, Seok-In

doi:10.1016/j.molcata.2009.02.008

Cited by 28 publications

(8 citation statements)

References 18 publications

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“…This is supported by other studies mentioning that polymeric V 2 O 5 species demonstrated greater catalytic activity than monomeric V 2 O 5 [178]. This is due to the greater mobility of lattice O 2 atoms resultant experience faster reduction and reoxidation by gaseous O 2 [179, 180]. Furthermore, the redox properties of V 2 O 5 are modified by the incorporation of TiO 2 , leading to an electronic interaction between TiO 2 and V 2 O 5 .…”

Section: Tio2: As Support In Heterogeneous Catalysissupporting

confidence: 70%

Titanium Dioxide as a Catalyst Support in Heterogeneous Catalysis

Bagheri

Julkapli

Hamid

2014

The Scientific World Journal

338

176

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The lack of stability is a challenge for most heterogeneous catalysts. During operations, the agglomeration of particles may block the active sites of the catalyst, which is believed to contribute to its instability. Recently, titanium oxide (TiO 2 ) was introduced as an alternative support material for heterogeneous catalyst due to the effect of its high surface area stabilizing the catalysts in its mesoporous structure. TiO 2 supported metal catalysts have attracted interest due to TiO 2 nanoparticles high activity for various reduction and oxidation reactions at low pressures and temperatures. Furthermore, TiO 2 was found to be a good metal oxide catalyst support due to the strong metal support interaction, chemical stability, and acid-base property. The aforementioned properties make heterogeneous TiO 2 supported catalysts show a high potential in photocatalyst-related applications, electrodes for wet solar cells, synthesis of fine chemicals, and others. This review focuses on TiO 2 as a support material for heterogeneous catalysts and its potential applications.

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Section: Tio2: As Support In Heterogeneous Catalysissupporting

confidence: 70%

Titanium Dioxide as a Catalyst Support in Heterogeneous Catalysis

Bagheri

Julkapli

Hamid

2014

The Scientific World Journal

338

176

View full text Add to dashboard Cite

show abstract

“…It was an indication that the Ti 4+ ions existed in all V-doped TiO 2 nanofibers, but the Ti 3+ ions were mainly present in the V-doped TiO 2 nanofibers with high V-doping amount (T3). It suggests that the TiO 2 could be reduced differently, resulting in various oxidation states due to the V doping [29]. Besides, as observed in Fig.…”

Section: Resultsmentioning

confidence: 78%

Electrospun nanofibers of V-doped TiO2 with high photocatalytic activity

Zhang

Shao

Zhang

et al. 2010

Journal of Colloid and Interface Science

127

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“…Ascorbic acid (100 mM) and Amplex red (10 mM) stock solutions were prepared in water and DMSO respectively, aliquoted, stored at −20°C, and thawed in the dark for 10 min just before use. The V-TiO 2 powder was kindly provided by Dr. Frank Hollmann (Delft University, Netherlands) and prepared according to a previously described protocol 60 . According to literature, the Chl purchased from Sigma consists of about 72% Cu(II)-chlorin e 6 and 10% Cu(II)-isochlorin e 4 37 .…”

Section: Methodsmentioning

confidence: 99%

Controlled depolymerization of cellulose by light-driven lytic polysaccharide oxygenases

et al. 2020

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Lytic polysaccharide (mono)oxygenases (LPMOs) perform oxidative cleavage of polysaccharides, and are key enzymes in biomass processing and the global carbon cycle. It has been shown that LPMO reactions may be driven by light, using photosynthetic pigments or photocatalysts, but the mechanism behind this highly attractive catalytic route remains unknown. Here, prompted by the discovery that LPMOs catalyze a peroxygenase reaction more efficiently than a monooxygenase reaction, we revisit these light-driven systems, using an LPMO from Streptomyces coelicolor (ScAA10C) as model cellulolytic enzyme. By using coupled enzymatic assays, we show that H 2 O 2 is produced and necessary for efficient lightdriven activity of ScAA10C. Importantly, this activity is achieved without addition of reducing agents and proportional to the light intensity. Overall, the results highlight the importance of controlling fluxes of reactive oxygen species in LPMO reactions and demonstrate the feasibility of light-driven, tunable enzymatic peroxygenation to degrade recalcitrant polysaccharides.

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The influence of non-stoichiometric species of V/TiO2 catalysts on selective catalytic reduction at low temperature

Cited by 28 publications

References 18 publications

Titanium Dioxide as a Catalyst Support in Heterogeneous Catalysis

Titanium Dioxide as a Catalyst Support in Heterogeneous Catalysis

Electrospun nanofibers of V-doped TiO2 with high photocatalytic activity

Controlled depolymerization of cellulose by light-driven lytic polysaccharide oxygenases

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