Shield Effect in Palladium@Graphene with Stability in Strong Acid and Sluggish H-Dissociation for Robust Coupling Hydrogenation–Bamberger Rearrangement of Nitrobenzene
Chunyu Yin,
Zhenli Xiang,
Yongyue Yao
et al.
Abstract:The inferior stability of noble metal-based thermocatalysts
for
effective catalytic hydrogenation reaction severely restricts the
production of value-added fine chemicals under a strong acid reaction
environment. Herein, a shield effect strategy is proposed to establish
ultrafine metal NPs with oxidation layers encapsulated in S- and N-doped
graphene with stability for robust coupling-efficient catalytic hydrogenation
and acid-catalyzed Bamberger rearrangement of nitrobenzene to p-aminophenol. The unconvention… Show more
“…Halogenated anilines, as important organic compounds or intermediates widely used for medicine, pesticide, dye manufacturing etc ., can be synthesized from the corresponding halogenated nitrobenzenes using hydrogen sources like hydrogen, hydrazine hydrate, formic acid, or NaBH 4 . 1–6 Although metal-based catalysts like Pt/TiO 2 , 7 Pd/CSs, 8 Pd@SOC, 9 Fe-phen/C-800, 10 Fe@C-2, 4 CoOx@NCNTs, 11 Ni@C-600, 12 and so forth have been proven effective for reducing halogenated nitrobenzene, a few non-negligible drawbacks may limit their large-scale industrial application, such as product contamination due to metal residue, high cost, and low selectivity. 8,13,14 Thus, the development of metal-free catalysts that can replace metal catalysts has become the focus of attention.…”
The N, P co-doped porous carbon materials were synthesized via the in situ pyrolysis of yeast post-water treatment and exhibited superior nitro hydrogenation performance using molecular hydrogen and hydrazine hydrate as hydrogen sources.
“…Halogenated anilines, as important organic compounds or intermediates widely used for medicine, pesticide, dye manufacturing etc ., can be synthesized from the corresponding halogenated nitrobenzenes using hydrogen sources like hydrogen, hydrazine hydrate, formic acid, or NaBH 4 . 1–6 Although metal-based catalysts like Pt/TiO 2 , 7 Pd/CSs, 8 Pd@SOC, 9 Fe-phen/C-800, 10 Fe@C-2, 4 CoOx@NCNTs, 11 Ni@C-600, 12 and so forth have been proven effective for reducing halogenated nitrobenzene, a few non-negligible drawbacks may limit their large-scale industrial application, such as product contamination due to metal residue, high cost, and low selectivity. 8,13,14 Thus, the development of metal-free catalysts that can replace metal catalysts has become the focus of attention.…”
The N, P co-doped porous carbon materials were synthesized via the in situ pyrolysis of yeast post-water treatment and exhibited superior nitro hydrogenation performance using molecular hydrogen and hydrazine hydrate as hydrogen sources.
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