Journal
ACS APPLIED NANO MATERIALS
Volume 5, Issue 8, Pages 11627-11635Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.2c02358
Keywords
hollow carbon sphere; bimetallic alloy; synergistic effect; chemoselective hydrogenation; halonitrobenzene
Funding
- National Natural Science Foundation of China [22072171]
- Ningbo Science and Technology Innovation [2018B10017, 2018B10077]
- Ningbo Science and Technology Bureau
- Postdoctoral Science Preferential Funding of Zhejiang Province, China [ZJ2020005]
- Natural Science Foundation of Ningbo [202003N4348]
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Supported Rh nanoparticles (NPs) have excellent activity for the hydrogenation of halonitrobenzenes (HNBs), but their selectivity and recycling stability are not satisfactory. In this study, a yolk-shell-structured catalyst consisting of RhCu alloy cores and hollow/microporous carbon shells (HCS) was designed to overcome these problems. The obtained RhCu@HCS catalyst showed good activity, selectivity, and stability in the hydrogenation of p-chloronitrobenzene to produce p-chloroaniline. This research provides a general strategy to design highly efficient and stable hydrogenation catalysts.
Supported Rh nanoparticles (NPs) exhibit excellent activity for the chemoselective hydrogenation of halonitrobenzenes (HNBs), but their selectivity to aromatic amines is not satisfactory due to the side reaction on the carbon-halogen bonds, and their recycling stability is limited due to the aggregation and the leaching of active component during the long-term usage. Herein, we design a yolk-shell-structured catalyst that consists of RhCu alloy cores and hollow/microporous carbon shells (HCS) to overcome these problems. The obtained RhCu@HCS catalyst with a Rh/Cu ratio of 1:1 showed good activity, selectivity, and stability in the hydrogenation of p-CNB (p-chloronitrobenzene) to produce p CAN (p-chloroaniline) due to the synergistic effect between Rh and Cu. The protective carbon shells not only prevented the aggregation of metal NPs but also allowed the reactants to diffuse freely across the shells. Therefore, our research provides a general strategy to design highly efficient and stable hydrogenation catalysts.
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