Platinum and N-doped carbon nanostructures as catalysts in hydrodechlorination reactions

Ruiz-García, Cristina; Heras, F. G. De Las; Calvo, L.; Alonso-Morales, Noelia; Rodrı́guez, Juan J.; Gilarranz, Miguel Á.

doi:10.1016/j.apcatb.2018.07.054

Cited by 33 publications

(20 citation statements)

References 42 publications

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“…3) are the most promising properties compared to other active/inert materials. They have been used for a long time as valuable supports for precious metals such as Pt, Pd, and Ru [44][45][46][47][48].…”

Section: Carbon and Goldmentioning

confidence: 99%

Development of gold catalysts supported by unreducible materials: Design and promotions

Luo

Dong

Petit

et al. 2021

Chinese Journal of Catalysis

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Gold catalysis had been considered a highly efficient candidate for heterogeneous catalysis. It is well established that reducible-material-supported Au NPs are more reactive than the unreducible materials, unless specific modifications are carried out. However, unreducible materials such as carbon materials, silica, and alumina have particular advantages, including the easily controlled surface property, adjustable microscopic structure, earth-abundant reserves, and facile industrial manufacture. New strategies, influences, and mechanisms of modification to enhance the catalytic performance and thermal stability of unreducible-material-supported gold catalysts are among the most attractive research topics in gold catalysis. However, to the best of our knowledge, reports and reviews focused on unreducible-material-supported gold catalysts are lacking. Herein, the above concept will be thoroughly discussed regarding several typical unreducible supports, including the commonly used silica, alumina, carbon materials, and hydroxyapatite. The currently prevailing modification strategies will be summarized in detail from the aspects of theoretical conceptualization and practical methodology, including the ingenious synthesis method for catalyst with a specific structure, the currently prosperous electrostatic adsorption, colloid immobilization, and the applicative thermal gaseous treatment. The influences of physical and chemical modifications on the surface chemistry, electronic structure, interaction/synergy between Au-support/promoter, catalyst morphology and water precipitation will be also summarized. It is assumed that the review will shed light on significant studies on unreducible support in gold catalysis with the purpose of catalytic promotion and the promotion of the potential industrial demands in advance. Furthermore, the review will provide new insights into unreducible supports that can be potentially applied in gold catalysis.

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Section: Carbon and Goldmentioning

confidence: 99%

Development of gold catalysts supported by unreducible materials: Design and promotions

Luo

Dong

Petit

et al. 2021

Chinese Journal of Catalysis

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“…On the other hand, 4-chlorophenol oxidation was chosen as the reaction to evaluate the synthesized materials, because it is considered as a model molecule for photocatalytic evaluations [17]. However, it is important to mention that the removal of chlorophenols can be carried out by other techniques, such as hydrodechlorination, which has been the subject of many investigations [18,19]. 4-chlorophenol is a pollutant commonly found in the effluents from industries related to insecticides, dyes, plastics, herbicides, detergents, wood preservatives, and petroleum reforming [20].…”

mentioning

confidence: 99%

Enhanced Photocatalytic Activity of Titania by Co-Doping with Mo and W

et al. 2018

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Various W and Mo co-doped titanium dioxide (TiO2) materials were obtained through the EISA (Evaporation-Induced Self-Assembly) method and then tested as photocatalysts in the degradation of 4-chlorophenol. The synthesized materials were characterized by thermogravimetric analysis (TGA), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), Raman spectroscopy (RS), N2 physisorption, UV-vis diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). The results showed that the W-Mo-TiO2 catalysts have a high surface area of about 191 m2/g, and the presence of an anatase crystalline phase. The co-doped materials exhibited smaller crystallite sizes than those with one dopant, since the crystallinity is inhibited by the presence of both species. In addition, tungsten and molybdenum dopants are distributed and are incorporated into the anatase structure of TiO2, due to changes in red parameters and lattice expansion. Under our experimental conditions, the co-doped TiO2 catalyst presented 46% more 4-chlorophenol degradation than Degussa P25. The incorporation of two dopant cations in titania improved its photocatalytic performance, which was attributed to a cooperative effect by decreasing the recombination of photogenerated charges, high radiation absorption capacity, high surface areas, and low crystallinity. When TiO2 is co-doped with the same amount of both cations (1 wt.%), the highest degradation and mineralization (97% and 74%, respectively) is achieved. Quinones were the main intermediates in the 4-chlorophenol oxidation by W-Mo-TiO2 and 1,2,4-benzenetriol was incompletely degraded.

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“…[22][23][24] While downsizing Pt particle as well as decreasing its loading appear to be viable strategies, using conventional wet impregnation method with subsequent reduction treatment remains insufficient to simultaneously enhance the electrochemical activity and lower the cost. [25][26][27][28] It is therefore pivotal to develop an efficient synthetic approach to obtain ultrafine Pt NPs and NCs.…”

Section: Doi: 101002/smtd202000265mentioning

confidence: 99%

Thermal Radiation Synthesis of Ultrafine Platinum Nanoclusters toward Methanol Oxidation

Qiao

Liu

et al. 2020

Small Methods

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Direct methanol fuel cells (DMFCs) are considered as a promising candidate for portable electronic devices and small electric vehicles due to their high gravimetric and volumetric energy densities. The operation of DMFCs requires efficient catalysts, especially on the anode to promote methanol oxidation reaction (MOR). To date, platinum has emerged as a chief contender for MOR. Unfortunately, most catalysts suffer from severe CO poisoning, which can passivate the catalytic surface and decrease the activity over time. Herein, a transient, thermal radiation method to synthesize ultrafine platinum nanoclusters (0.68 ± 0.13 nm) supported on carbon black (Pt NC/CB) is demonstrated. The sample demonstrates a great CO poisoning resistance and excellent activity toward MOR. The ultrafine platinum nanoclusters with increased active sites can promote the oxidation of CO at potential as low as 0.4 V. The Pt NC/CB displays an onset potential of 0.4 V and a peak current density of 1.30 mA cm−2ECSA (electrochemical active surface area), which is superior than that of reported catalysts (0.57–1.06 mA cm−2ECSA), while many of the catalysts are alloys involving noble metals. This work showcases an efficient method to prepare Pt nanoclusters with high MOR activity and great CO poisoning resistance.

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Platinum and N-doped carbon nanostructures as catalysts in hydrodechlorination reactions

Cited by 33 publications

References 42 publications

Development of gold catalysts supported by unreducible materials: Design and promotions

Development of gold catalysts supported by unreducible materials: Design and promotions

Enhanced Photocatalytic Activity of Titania by Co-Doping with Mo and W

Thermal Radiation Synthesis of Ultrafine Platinum Nanoclusters toward Methanol Oxidation

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