Chitosan-derived N-doped carbon catalysts with a metallic core for the oxidative dehydrogenation of NH–NH bonds

Abstract

Sustainable metal-encased (Ni–Co/Fe/Cu)@N-doped-C catalysts were prepared from bio-waste and used for the oxidative dehydrogenation reaction.

Nitrogen-Doped Carbon Supported Co/Ni Bimetallic Catalyst for Selectively Reductive N-Formylation of Nitroso in Guanine Synthesis

“…In particular, the complexes derived from the chelation of amino groups on the skeleton of chitosan with metal ions can transformed to NC supported metal catalysts under high temperature pyrolysis, in which the nitrogen atoms serve as condensation centers for the nucleation and growth of metal NPs. Many N-doped carbon supported metal catalysts have been developed and found excellent performances in various reactions from chitosan in combination with metal salts [25][26][27][28].…”

Recent Advances on Heteroatom‐Doped Porous Carbon/Metal Materials: Fascinating Heterogeneous Catalysts for Organic Transformations

“…For the preparation of (Co@g‐C/N), firstly, glyoxal and urea were condensed under acidic conditions to form glycoluril and it was then cyclized with methylene bridges from formaldehyde to generate cucurbiturils (CB) in different sizes (n=3–8). In the following, CB [6] was separated from the other CB's and chelated with Co (OAc) 2 ⋅ 4H 2 O. In the final step, the resulting material was carbonized under flowing argon at 800 °C to produce Co@g‐C/N (Figure 31).…”

“…The synthesis of a series of nickel‐based bimetallic nanocomposites encased by N‐doped graphene‐like carbon (Ni‐M)@N‐doped‐C (M‐Co, Fe, Cu) was reported by Han and coworkers (Figure 62). [6] These core‐shell catalysts were prepared through the complexation of non‐precious transition metal salts with chitosan and next carbonization at 700 °C. The Ni‐Fe@N‐doped‐C catalyst demonstrated the highest catalytic activity in the dehydrogenation of hydrazobenzene to azobenzene under oxidant/additive‐free conditions likely owing to its larger surface area and high pore‐size dispersion.…”

“…These third‐generation catalysts combine the benefits of excellent selectivity and activity of homogeneous systems with the reusability and sustainability of heterogeneous catalysts [5] . In recent years, monometallic and bimetallic heterogeneous catalytic systems, have been extensively employed for many utilizations [6] …”

Unraveling a Biomass-Derived Multiphase Catalyst for the Dehydrogenative Coupling of Silanes with Alcohols under Aerobic Conditions

“…[136][137][138][139] In addition to these seminal works, other catalytic materials synthesized following a similar preparation approach have also been reported. [140][141][142][143][144][145][146][147][148][149] In general, metal-based materials prepared by pyrolysis tend to be heterogeneous in composition and particle size. In fact, the resulting materials are typically constituted by metal species of different nature, such as metallic and/or metal oxide NPs.…”