N-Doped CMK-3 Carbons Supporting Palladium Nanoparticles as Catalysts for Hydrodechlorination

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

doi:10.1021/acs.iecr.8b06084

Cited by 22 publications

(8 citation statements)

References 60 publications

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“…The N 1s XPS spectrum is shown in Figure a–c and exhibits five peaks at 399, 400, 401, 403, and 407 eV. These peaks are assigned to pyridinic (N-6), pyrrolic/pyridine (N-5), quaternary (N-Q) nitrogen, pyridine- N -oxide (N-X), and nitrate nitrogen (NO 3 – -N), respectively. − As seen in Figure d, the pyridine- N -oxide (N-X) is the main N species in WHPC and has been reported to be unrelated to the capacitance of the materials . For WHPC@Ni, the quaternary nitrogen (N-Q) was instead the main N species, which would provide chemically active sites to improve the power density of the supercapacitors .…”

Section: Resultsmentioning

confidence: 97%

Harvesting Biomass-Based Ni–N Doped Carbonaceous Materials with High Capacitance by Fast Pyrolysis of Ni Enriched Spent Wetland Biomass

Sima

Jiang

Shen

et al. 2019

Ind. Eng. Chem. Res.

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In this study, taking Ni enriched water hyacinth (WH, Eichhornia crassipes) as an example, we prepared porous Ni–N doped carbon material (WHPC@Ni) with high supercapacitive performance via fast pyrolysis and KOH activation of WH biomass. The as-prepared WHPC@Ni exhibited an excellent capacitance (552 F g–1 in 6 M KOH) and high stability (97.5% of capacitance remained after 10 000 cycles), which is much higher than its counterpart WHPC–Ni (derived from WH postadsorbed Ni) and ranks it as one of the best reported biomass-based carbonaceous materials. Multiple characterizations and control experiments showed that the small and monodispersed NiO nanoparticles (∼13 nm) in WHPC@Ni played an important role in the enhancement of capacitance. The formation of small NiO nanoparticles may be ascribed to the confinement of organizations of WH (e.g., vessel and cell wall) during the assimilation of Ni, whereas the postadsorbed Ni tended to aggregate during thermochemical treatment (25–85 nm).

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Section: Resultsmentioning

confidence: 97%

Harvesting Biomass-Based Ni–N Doped Carbonaceous Materials with High Capacitance by Fast Pyrolysis of Ni Enriched Spent Wetland Biomass

Sima

Jiang

Shen

et al. 2019

Ind. Eng. Chem. Res.

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“…Hydrodechlorination with hydrogen is considered as an effective method for the treatment of organochlorinated contaminants. , We began with the hydrodechlorination of 4-chlorophenol at 80 °C with ammonium formate as the hydrogen source (Figure c,d). No product was detected when the reaction was conducted in the absence of isolated palladium atoms on the support.…”

Section: Resultsmentioning

confidence: 99%

Direct Synthesis of Atomically Dispersed Palladium Atoms Supported on Graphitic Carbon Nitride for Efficient Selective Hydrogenation Reactions

Leng

Zhang

et al. 2020

ACS Appl. Mater. Interfaces

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Heterogeneous catalysts with atomically precise metal sites have enabled unique insight into structure−property relationships in materials science. Herein, we report the construction and selective hydrogenation performance of a single-atom palladium catalyst by confining the palladium atoms into the six-fold N-coordinating cavities of graphitic carbon nitride (g-C 3 N 4 ) through a facile spatial confinement-reduction approach under mild reducing conditions. Spherical aberration correction electron microscopy and extended X-ray absorption fine structure measurements confirm the presence of atomically dispersed palladium atoms stabilized by the g-C 3 N 4 support. Its exceptional catalytic activity was demonstrated by the hydrogenation of styrene (98% conversion, 1.5 h) and furfural (conversion of 64% and selectivity of 99%, 4 h) and hydrodechlorination of 4-chlorophenol (99% conversion and 99% selectivity, 10 min). This palladium catalyst can be reused at least five times with negligible deterioration of its activity. Importantly, the palladium atoms retained their atomic dispersion following the thermal treatment. Moreover, this synthetic method can be scaled up while retaining similar catalytic activity. Fundamental insights are provided to elucidate how the material's structure significantly impacts the catalytic performance at the atomic scale.

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“…Catalysts play a crucial role in HDC reactions. At present, the commonly used catalysts for HDC reactions include Pd, − Rh, Pt, − Ni, , and Co, among which the Pd-based catalysts are commonly recognized as the most promising one. In addition, the bimetallic Pd-M catalysts (M = Fe, Co, , Ni, Cu, , Au, − or Ag − ) can enhance the catalytic performance compared to their monometallic counterparts due to the synergistic effect between Pd and M. Moreover, using non-noble metals as the second metal can also decrease the cost of the catalysts.…”

Section: Introductionmentioning

confidence: 99%

“…The purpose is to combine the high stability of hollow catalytic nanoreactors with the synergistic effect of metal−metal oxide hybrid nanostructures. Literature studies have reported the use of polyoxyethylene (10)…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Pd–Co_xO_y Hybrid Nanostructure-Encapsulated Hollow Silica Nanospheres through Reverse Microemulsion Systems and Their Application as Efficient Hydrodechlorination Catalysts

et al. 2022

ACS Appl. Mater. Interfaces

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Pd–Co x O y heteroaggregate-encapsulated hollow porous silica nanoreactors (Pd–Co x O y @HPSNs) were synthesized by a reverse microemulsion system. The key design of the developed reverse microemulsion system is to use poly(ethyleneimine) in the water droplets as the void templates for silica deposition and for anchoring the catalytic functionality inside the hollow silica nanospheres. The synthesized Pd–Co x O y @HPSNs contain ∼3 nm Pd–Co x O y hybrid nanostructures in ∼10 nm central cavities of silica nanospheres and illustrated a significantly promoted efficiency for hydrodechlorination of a series of chlorophenols into phenols under mild reaction conditions. The catalytic enhancement of Pd–Co x O y @HPSNs is ascribed to the synergistic effect between Pd and Co x O y and the protection of silica shells to the inner catalytic functionality.

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N-Doped CMK-3 Carbons Supporting Palladium Nanoparticles as Catalysts for Hydrodechlorination

Abstract: https://repositorio.uam.es Esta es la versión de autor del artículo publicado en: This is an author produced version of a paper published in:

Cited by 22 publications

References 60 publications

Harvesting Biomass-Based Ni–N Doped Carbonaceous Materials with High Capacitance by Fast Pyrolysis of Ni Enriched Spent Wetland Biomass

Harvesting Biomass-Based Ni–N Doped Carbonaceous Materials with High Capacitance by Fast Pyrolysis of Ni Enriched Spent Wetland Biomass

Direct Synthesis of Atomically Dispersed Palladium Atoms Supported on Graphitic Carbon Nitride for Efficient Selective Hydrogenation Reactions

Synthesis of Pd–Co_xO_y Hybrid Nanostructure-Encapsulated Hollow Silica Nanospheres through Reverse Microemulsion Systems and Their Application as Efficient Hydrodechlorination Catalysts

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N-Doped CMK-3 Carbons Supporting Palladium Nanoparticles as Catalysts for Hydrodechlorination

Abstract: https://repositorio.uam.es Esta es la versión de autor del artículo publicado en: This is an author produced version of a paper published in:

Cited by 22 publications

References 60 publications

Harvesting Biomass-Based Ni–N Doped Carbonaceous Materials with High Capacitance by Fast Pyrolysis of Ni Enriched Spent Wetland Biomass

Harvesting Biomass-Based Ni–N Doped Carbonaceous Materials with High Capacitance by Fast Pyrolysis of Ni Enriched Spent Wetland Biomass

Direct Synthesis of Atomically Dispersed Palladium Atoms Supported on Graphitic Carbon Nitride for Efficient Selective Hydrogenation Reactions

Synthesis of Pd–CoxOy Hybrid Nanostructure-Encapsulated Hollow Silica Nanospheres through Reverse Microemulsion Systems and Their Application as Efficient Hydrodechlorination Catalysts

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Synthesis of Pd–Co_xO_y Hybrid Nanostructure-Encapsulated Hollow Silica Nanospheres through Reverse Microemulsion Systems and Their Application as Efficient Hydrodechlorination Catalysts