Hydrodechlorination activity of catalysts based on nitrogen-doped carbons from low-density polyethylene

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

doi:10.1016/j.carbon.2015.02.068

Cited by 16 publications

(15 citation statements)

References 47 publications

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“…The most active catalyst, Pd/CB2800, yielded much higher activity than the reported in previous works for Pd supported on γ-alumina (0.7 mmol·gPd -1 ·min -1 ) [33] and Alpillared clays (0.3 mmol·gPd -1 ·min -1 ) [34], Pd supported on nitrogen-doped carbon (55.6 mmol·gPd -1 ·min -1 ) [19] and bimetallic RhPd unsupported NPs (67.0 mmol·gPd -1 ·min -1 ) [35], but equivalent to the previously obtained with catalysts prepared with CB as support after impregnation with PVP-Pd NPs (ex-situ synthesis) [36].…”

Section: Stem Characterizationmentioning

confidence: 60%

“…Homemade graphitized supports (CB2800 and CBPE2600) were prepared from a commercial carbon black (CB; Alfa Aesar, 100 % acetylene) and from a carbon blacklike material obtained from pyrolysis of low-density polyethylene (CBPE), as described elsewhere [19,20]. Both CB and CBPE supports were heat-treated at temperatures of 2800 and 2600 o C, respectively, during 30 min under He flow.…”

Section: Preparation Of Supports and Catalystsmentioning

confidence: 99%

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Effect of structural ordering of the carbon support on the behavior of Pd catalysts in aqueous-phase hydrodechlorination

Baeza

Calvo

Alonso-Morales

et al. 2018

Chemical Engineering Science

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Section: Stem Characterizationmentioning

confidence: 60%

Section: Preparation Of Supports and Catalystsmentioning

confidence: 99%

Effect of structural ordering of the carbon support on the behavior of Pd catalysts in aqueous-phase hydrodechlorination

Baeza

Calvo

Alonso-Morales

et al. 2018

Chemical Engineering Science

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“…S2, Supplementary Material), which has been related to changes in selectivity [60]. Compared with catalysts reported in the literature, E10PVP5 has a higher selectivity to cyclohexanone than the aforementioned Pd/Al-pillared clays [62] and Pd supported on nitrogen-doped carbon [63] catalysts, but lower than…”

Section: Catalysts Selectivitymentioning

confidence: 92%

Catalysts based on large size-controlled Pd nanoparticles for aqueous-phase hydrodechlorination

Baeza

Calvo

Rodrı́guez

et al. 2016

Chemical Engineering Journal

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“…It has been reported that nitrogen doping may not only change the physical and chemical properties of carbon carriers but may also enhance the interaction between support and metal active components, and thus improve the activity and stability of the catalyst [ 15 , 16 ]. Indeed, many studies have shown that nitrogen doping of carbon supports can greatly improve the catalytic performance of Pd catalysts in liquid-phase catalytic hydrodechlorination [ 8 , 9 , 10 , 17 , 18 , 19 ]. Zhou et al reported that nitrogen-doped graphene-supported Pd catalysts exhibited much higher catalytic activities for hydrodechlorination of 2,4-dichlorophenol (2,4-DCP) in comparison with Pd/graphene [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

“…Zhou et al reported that nitrogen-doped graphene-supported Pd catalysts exhibited much higher catalytic activities for hydrodechlorination of 2,4-dichlorophenol (2,4-DCP) in comparison with Pd/graphene [ 17 ]. Baeza et al found that nitrogen doping can greatly improve the performance of carbon-supported Pd catalysts in the hydrodechlorination of 4-chlorophenol to phenol [ 18 ]. In our group, we observed that nitrogen-doped mesoporous carbon prepared through a one-step method was a more effective Pd support than un-doped mesoporous carbon in the hydrodechlorination of 2,4-DCP [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Catalytic Performance of Nitrogen-Doped Activated Carbon Supported Pd Catalyst for Hydrodechlorination of 2,4-Dichlorophenol or Chloropentafluoroethane

Tang

Meng

et al. 2019

Molecules

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Nitrogen-doped activated carbon (N-AC) obtained through the thermal treatment of a mixture of HNO3-pretreated activated carbon (AC) and urea under N2 atmosphere at 600 °C was used as the carrier of Pd catalyst for both liquid-phase hydrodechlorination of 2,4-dichlorophenol (2,4-DCP) and gas-phase hydrodechlorination of chloropentafluoroethane (R-115). The effects of nitrogen doping on the dispersion and stability of Pd, atomic ratio of Pd/Pd2+ on the surface of the catalyzer, the catalyst’s hydrodechlorination activity, as well as the stability of N species in two different reaction systems were investigated. Our results suggest that, despite no improvement in the dispersion of Pd, nitrogen doping may significantly raise the atomic ratio of Pd/Pd2+ on the catalyst surface, with a value of 1.2 on Pd/AC but 2.2 on Pd/N-AC. Three types of N species, namely graphitic, pyridinic, and pyrrolic nitrogen, were observed on the surface of Pd/N-AC, and graphitic nitrogen was stable in both liquid-phase hydrodechlorination of 2,4-DCP and gas-phase hydrodechlorination of R-115, with pyridinic and pyrrolic nitrogen being unstable during gas-phase hydrodechlorination of R-115. As a result, the average size of Pd nanocrystals on Pd/N-AC was almost kept unchanged after liquid-phase hydrodechlorination of 2,4-DCP, whereas crystal growth of Pd was clearly observed on Pd/N-AC after gas-phase hydrodechlorination of R-115. The activity test revealed that Pd/N-AC exhibited a much better performance than Pd/AC in liquid-phase hydrodechlorination of 2,4-DCP, probably due to the enhanced stability of Pd exposed to the environment resulting from nitrogen doping as suggested by the higher atomic ratio of Pd/Pd2+ on the catalyst surface. In the gas-phase hydrodechlorination of R-115, however, a more rapid deactivation phenomenon occurred on Pd/N-AC than on Pd/AC despite a higher activity initially observed on Pd/N-AC, hinting that the stability of pyridinic and pyrrolic nitrogen plays an important role in the determination of catalytic performance of Pd/N-AC.

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Hydrodechlorination activity of catalysts based on nitrogen-doped carbons from low-density polyethylene

Cited by 16 publications

References 47 publications

Effect of structural ordering of the carbon support on the behavior of Pd catalysts in aqueous-phase hydrodechlorination

Effect of structural ordering of the carbon support on the behavior of Pd catalysts in aqueous-phase hydrodechlorination

Catalysts based on large size-controlled Pd nanoparticles for aqueous-phase hydrodechlorination

Catalytic Performance of Nitrogen-Doped Activated Carbon Supported Pd Catalyst for Hydrodechlorination of 2,4-Dichlorophenol or Chloropentafluoroethane

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