An Fe-modified Co–B amorphous alloy supported on carbon nanotubes for the hydrogenation of m-chloronitrobenzene

Li, Feng; Liang, Jinrong; Wang, Keliang; Cao, Bo; Zhu, Weiping; Song, Hua

doi:10.1007/s11144-017-1139-5

Cited by 7 publications

(4 citation statements)

References 26 publications

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“…Also, two satellite peaks located at 785.2 and 802.2 eV are displayed derived from the corresponding Co–O and Co–P elements. For the Fe 2p spectrum in Figure f, the two deconvoluted peaks at 710.2 (Fe 2p 3/2 ) and 723.6 eV (Fe 2p 1/2 ) are indicating the presence of Fe 2+ , whereas another two peaks at 715.4 (Fe 2p 3/2 ) and 726.1 eV (Fe 2p 1/2 ) are ascribed to the Fe 3+ state. , Also, the peaks at 706.6 and 720.0 eV are contributed to Fe–P bonding, which confirms the successful formation of FeP during the phosphorization process . For the P 2p spectrum as shown in Figure g, the doublets at 129.7 eV can be assigned to the metal phosphide (M–P, M: Co and Fe) and the broad feature at 133.8 eV is attributed to the surface oxidation of metallic phosphide .…”

Section: Resultsmentioning

confidence: 69%

Synthesis of Remarkably Thin Co–Fe Phosphide/Carbon Nanosheet for Enhanced Oxygen Evolution Reaction Electrocatalysis Driven by Readily Generated Active Oxyhydroxide

Kim

Park

Yan

et al. 2022

ACS Appl. Energy Mater.

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To achieve a sustainable and clean future, water electrolysis is of great importance to produce hydrogen and oxygen. Also, due to the sluggish process of reaction, it is crucial to fabricate high-performance oxygen evolution reaction (OER) catalysts to increase the overall efficiency of water electrolysis. In this study, we present a remarkably thin Co−Fe phosphide/carbon (CFP) nanosheet for the OER catalyst. The fabrication of CFP nanosheet is accomplished by three easy steps, which start with the synthesis of Co-and Fe-based brucite-type metal hydroxide (CFT) using an organic linker. Then, CFT undergoes subsequent oxidation and phosphorization to become CFP. During post-treatment, the organic linker becomes a carbon composite and remains on the CFP nanosheet which could benefit the overall catalytic efficiency. CFP nanosheet is equipped with a thickness of 7.67 nm on average, which is recognizably low considering the post-treatments. The electrochemical OER performance of CFP nanosheet implies high catalysis capability toward OER with the overpotential of 277 and 362 mV to reach the current density of 10 and 150 mA•cm −2 , respectively. To investigate the catalytic active site, ex situ XPS analysis shows some beneficial characteristics of CFP nanosheet that benefit the OER catalysis overall. The investigation suggests that reactive oxyhydroxides (peroxo-like O 2 2− species) are formed via surface reconstruction and gradually increase during the OER catalysis. This phenomenon implies the synergistic effect between Co and Fe, which is determined by electrochemical measurements. Also, the evidence of lattice oxygen implies the possible OER mechanism in which the involvement of the oxygen intermediates is crucial. The utilization of our investigation can be extended to other fields of energy material synthesis, which include batteries, supercapacitors, and even other electrochemical catalysts.

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Section: Resultsmentioning

confidence: 69%

Synthesis of Remarkably Thin Co–Fe Phosphide/Carbon Nanosheet for Enhanced Oxygen Evolution Reaction Electrocatalysis Driven by Readily Generated Active Oxyhydroxide

Kim

Park

Yan

et al. 2022

ACS Appl. Energy Mater.

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“…The selectivity of this reaction may be affected by the use of additives or by a pre‐treatment of the catalyst but also by metal dispersion, support interactions or by the presence of a second metal . Aromatic chloroanilines, obtainable by selective hydrogenation of the nitro group of chloro nitroarenes, are valuable industrial products ,. The selectivity depends on the type of catalyst and on the reaction conditions .…”

Section: Resultsmentioning

confidence: 99%

“…Aromatic chloroanilines, obtainable by selective hydrogenation of the nitro group of chloro nitroarenes, are valuable industrial products ,. The selectivity depends on the type of catalyst and on the reaction conditions . So, it was interesting to evaluate if the different metals present in Met x ‐EPS could influence the result of the hydrogenation of 1‐chloro‐3‐nitrobenzene ( 20 ) (Scheme , Table ).…”

Section: Resultsmentioning

confidence: 99%

Alternative Recovery and Valorization of Metals from Exhausted Catalytic Converters in a New Smart Polymetallic Catalyst

et al. 2019

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A new metals‐polymeric composite, Metx‐EPS (I), was prepared to be used as catalyst in water or in two‐phase aqueous conditions. The metals source was an exhausted catalytic converter that was grinded and treated with an acidic solution at room temperature. After filtration, the solution was concentrated, neutralized and added to a broth of Klebsiella oxytoca DSM 29614 to produce (I) where metals are embedded in a peculiar polysaccharide structure (EPS). The composite was easily recovered from the fermentation broth and purified. The process protocol was verified many times and was shown to be reproducible satisfactorily. The % recovery of metals, originally present in the converter, was good as determined by atomic absorption. The morphology and the chemical state of main metals in (I) were investigated by X‐ray absorption spectroscopy methods (XANES and EXAFS). No metallic alloy seems to be evident. The catalytic activity and a possible synergic effect due to the presence of the different metals was valuated in the hydrogenation of some substrates, valuable precursors for the production of fine chemicals.

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“…Noble metals Pt, Ru, Pd, and Au have been applied in the hydrogenation of CNBs to CANs and exhibited excellent catalytic performance. − However, their high cost and scarce resources greatly limit their wide application in industries. For the past few years, many non-noble metal catalysts such as Ni, , Ni–B, Co–B, , and Co–Mo–S for the hydrogenation of CNBs have been developed. However, these catalytic systems still need high metal loading or harsh reaction conditions.…”

Section: Introductionmentioning

confidence: 99%

Non-Noble Metal Ni Nanoparticles Supported on Highly Dispersed TiO₂-Modified Activated Carbon as an Efficient and Recyclable Catalyst for the Hydrogenation of Halogenated Aromatic Nitro Compounds under Mild Conditions

Huang

Liu

et al. 2020

Ind. Eng. Chem. Res.

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TiO2-modified oxygen-functionalized activated carbon (TiO2@OAC)-loaded nickel-based catalysts (Ni/TiO2@OAC) were synthesized and applied in the hydrogenation of chloronitrobenzene (CNB) to chloroanilines (CANs). The characterization results indicate that introduction of TiO2 restrains nickel nanoparticles sintering and improves the stability of the catalysts by strong metal–support interaction. Additionally, the X-ray photoelectron spectroscopy results suggest that the electron donating effect of Ti3+ produces electron-rich Ni (Niδ−), which inhibits C–Cl moiety adsorption. The formed Niδ− species might induce electron-rich hydrogen (H–) generation which facilitates a nucleophilic attack on −NO2 rather than an electrophilic attack on the C–Cl bond. Furthermore, the electron-donating ability of −NH2 could be reduced because of the interaction between −OH in TiO2@OAC and −NH2 in CAN. Hence, the dechlorination is inhibited and the selectivity to m-CAN is up to 99.0%. The catalytic performance of Ni/TiO2@OAC could be maintained after five cycles.

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An Fe-modified Co–B amorphous alloy supported on carbon nanotubes for the hydrogenation of m-chloronitrobenzene

Cited by 7 publications

References 26 publications

Synthesis of Remarkably Thin Co–Fe Phosphide/Carbon Nanosheet for Enhanced Oxygen Evolution Reaction Electrocatalysis Driven by Readily Generated Active Oxyhydroxide

Synthesis of Remarkably Thin Co–Fe Phosphide/Carbon Nanosheet for Enhanced Oxygen Evolution Reaction Electrocatalysis Driven by Readily Generated Active Oxyhydroxide

Alternative Recovery and Valorization of Metals from Exhausted Catalytic Converters in a New Smart Polymetallic Catalyst

Non-Noble Metal Ni Nanoparticles Supported on Highly Dispersed TiO₂-Modified Activated Carbon as an Efficient and Recyclable Catalyst for the Hydrogenation of Halogenated Aromatic Nitro Compounds under Mild Conditions

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An Fe-modified Co–B amorphous alloy supported on carbon nanotubes for the hydrogenation of m-chloronitrobenzene

Cited by 7 publications

References 26 publications

Synthesis of Remarkably Thin Co–Fe Phosphide/Carbon Nanosheet for Enhanced Oxygen Evolution Reaction Electrocatalysis Driven by Readily Generated Active Oxyhydroxide

Synthesis of Remarkably Thin Co–Fe Phosphide/Carbon Nanosheet for Enhanced Oxygen Evolution Reaction Electrocatalysis Driven by Readily Generated Active Oxyhydroxide

Alternative Recovery and Valorization of Metals from Exhausted Catalytic Converters in a New Smart Polymetallic Catalyst

Non-Noble Metal Ni Nanoparticles Supported on Highly Dispersed TiO2-Modified Activated Carbon as an Efficient and Recyclable Catalyst for the Hydrogenation of Halogenated Aromatic Nitro Compounds under Mild Conditions

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Non-Noble Metal Ni Nanoparticles Supported on Highly Dispersed TiO₂-Modified Activated Carbon as an Efficient and Recyclable Catalyst for the Hydrogenation of Halogenated Aromatic Nitro Compounds under Mild Conditions