Ni@Pd core–shell nanoparticles modified fibrous silica nanospheres as highly efficient and recoverable catalyst for reduction of 4-nitrophenol and hydrodechlorination of 4-chlorophenol

Dong, Zhengping; Le, Xuanduong; Dong, Chunhui; Zhang, Wei; Li, Xinlin; Ma, Jiantai

doi:10.1016/j.apcatb.2014.07.009

Cited by 395 publications

(193 citation statements)

References 58 publications

Supporting

Mentioning

190

Contrasting

Order By: Relevance

“…The decreasing of the reaction rate after 1 h of the TCE hydrodechlorination was observed in the case of all the catalysts (Table 2). Our results are in agreement with earlier studies of Dong et al [26] and could be explained by the progressive agglomeration of nickel particles under the reaction conditions and/or partial deactivation of nickel active sites by irreversible adsorption of products. The XRD experiments of the used catalysts showed that there are no significant changes in the size of the metal particles after hydrodechlorination reaction.…”

Section: Catalytic Activitysupporting

confidence: 83%

“…Zhou et al [29] postulated the volcano type of the relationship between the hydrodechlorination activity and metal particles size. On the other hand, recently published results of the aqueous phase hydrodechlorination of chloroorganic compounds indicate the beneficial role of the small metal particles on overall activity of the metallic catalysts [26,30,31]. Our results showed that the aqueous phase hydrodechlorination of 1,1,2-trichloroethene is structurally sensitive, and large nickel particles (*30 nm) are the most active for this reaction under the studied conditions.…”

Section: Catalytic Activitymentioning

confidence: 51%

“…However, the kinetics of TCE hydrodechlorination for Ni catalysts did not show a straight line characteristic for pseudo-first order reaction. Based on the literature data [26], the reaction kinetics was divided into two parts for each catalyst: before 60 min, with the highest value of the reaction rate constant k obtained for Ni(Cl)-H (Table 2) and from 60 to 150 min of the reaction, with the highest value of reaction rate constant k obtained for Ni(N)-H ( Table 2). The decreasing of the reaction rate after 1 h of the TCE hydrodechlorination was observed in the case of all the catalysts (Table 2).…”

Section: Catalytic Activitymentioning

confidence: 99%

See 2 more Smart Citations

Effect of metal precursor and pretreatment conditions on the catalytic activity of Ni/C in the aqueous phase hydrodechlorination of 1,1,2-trichloroethene

Kowalewski

Kamińska

Słowik

et al. 2017

Reac Kinet Mech Cat

View full text Add to dashboard Cite

Active carbon supported nickel catalysts prepared with nickel(II) nitrate and nickel(II) chloride precursors after reduction at 673 or 1173 K were investigated in the aqueous phase hydrodechlorination of 1,1,2-trichloroethene (TCE). These nickel catalysts facilitate the purification of water via decomposing TCE, but their catalytic properties depend on the chemistry of the nickel precursor used for Ni/C synthesis and pretreatment conditions. The chemistry of precursor catalysts affects the particle size, which in turn is correlated with catalytic activity. We observed the highest activity for Ni/C with the largest nickel particles. The application of high temperature reduction of nickel precursors increases the activity and minimizes the differences between the catalytic properties of the samples prepared from different salts.

show abstract

Section: Catalytic Activitysupporting

confidence: 83%

Section: Catalytic Activitymentioning

confidence: 51%

Section: Catalytic Activitymentioning

confidence: 99%

See 1 more Smart Citation

Effect of metal precursor and pretreatment conditions on the catalytic activity of Ni/C in the aqueous phase hydrodechlorination of 1,1,2-trichloroethene

Kowalewski

Kamińska

Słowik

et al. 2017

Reac Kinet Mech Cat

View full text Add to dashboard Cite

show abstract

“…Reprinted with permission from [51]. The catalytic activity of the Ni@Pd/KCC-1 nanocatalysts was verified by the reduction of 4-nitrophenol to 4-aminophenol using NaBH4 as the reductant.…”

Section: Methodsmentioning

confidence: 99%

“…Such complicated approaches are neither efficient nor operative for the extensive production and applications that are particularly important in chemical industries [50]. These facts motivated continuous research improvements by the same group for the developments of highly active and magnetically recyclable Ni@Pd/KCC-1 nanocatalyst [51]. The immobilization of Ni@Pd NPs on the KCC-1 to fabricate the magnetic recyclable nanocatalysts could be promising for the purpose of preventing the aggregation of nanocatalysts, increasing the accessibility of the active sites and conferring the magnetic separation property to the nanocatalysts.…”

Section: Nano-sized Magnetic and Porous Nanocomposite Catalystsmentioning

confidence: 99%

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Shokouhimehr

2015

Catalysts

185

View full text Add to dashboard Cite

This review is focused on the strategies and designs of magnetic nanostructured catalysts showing the enhanced and sustainable catalytic performances for the heterogeneous reduction of nitoaromatics. Magnetic catalysts have the benefits of easy recovery and reuse after the completion of the reactions and green chemical processes. Magnetic separation, among the various procedures for removing catalysts, not only obviates the requirement of catalyst filtration or centrifugation after the completion of reactions, but also provides a practical technique for recycling the magnetized nanostructured catalysts. Consequently, discussions will address the methodologies and exemplars for the reusable magnetic composite catalysts. Because the synthesis of ideal magnetic nanostructured catalysts is of primary importance in the development of high-quality sustainable processes, the designs, preparation methods and recyclability of various recoverable magnetic nanostructured catalysts are emphasized. The representative methods and strategies for the synthesis of durable and reusable magnetic nanostructured catalysts are highlighted. The advantages, disadvantages, recyclability and the efficiency of the introduced heterogeneous systems have been explored in the reduction of nitrobenzene derivatives.

show abstract

Kinetics‐Controlled Synthesis of Ordered Mesoporous Carbon Single Crystals from Liquefied Wood

Zhang

Sun

et al. 2023

Adv Funct Materials

View full text Add to dashboard Cite

The architectures of carbon materials prepared via soft-templating method greatly depend on the assembly pattern of micelles. Herein, a kineticscontrolled strategy is developed to fabricate ordered mesoporous carbon (OMC) single crystals from liquefied wood by using melamine to regulate the polymerization rate of carbon precursors, which further affects the assembly process. Due to the slow hydroxymethylation reaction of melamine with formaldehyde in acid, the addition of melamine can decelerate the reaction kinetics to produce no seed nuclei at the initial stage, which favors the composite micelles to orderly aggregate and further grow in a layer-by-layer pattern to form OMC single crystals after carbonization. The OMC single crystals with high specific surface areas (733 m 2 g −1 ), uniform mesopore size (3.2 nm), and ordered Im3m mesostructure are ideal supports to couple with Ag nanoparticles to act as efficient catalysts, which exhibits remarkable catalytic performance for the reduction of 4-nitrophenol.

show abstract

Ni@Pd core–shell nanoparticles modified fibrous silica nanospheres as highly efficient and recoverable catalyst for reduction of 4-nitrophenol and hydrodechlorination of 4-chlorophenol

Cited by 395 publications

References 58 publications

Effect of metal precursor and pretreatment conditions on the catalytic activity of Ni/C in the aqueous phase hydrodechlorination of 1,1,2-trichloroethene

Effect of metal precursor and pretreatment conditions on the catalytic activity of Ni/C in the aqueous phase hydrodechlorination of 1,1,2-trichloroethene

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Kinetics‐Controlled Synthesis of Ordered Mesoporous Carbon Single Crystals from Liquefied Wood

Contact Info

Product

Resources

About