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In Situ Synthesis of Unsupported Nickel Phosphides and Their Activity in 1,4-Dichlorobenzene Hydrodechlorination
https://orcid.org/https://orcid.org/0000-0001-5490-8610
https://orcid.org/https://orcid.org/0000-0002-6125-902X
https://orcid.org/https://orcid.org/0000-0001-8850-2141
A series of unsupported nickel phosphides were synthesized in situ in a reaction mixture under the conditions of hydrodechlorination of 1,4-dichlorobenzene. Triphenylphosphine and red phosphorus were used as phosphorus sources, beneficial in terms of environmental friendliness and cost effectiveness. Using X-ray fluorescence spectrometry, it was demonstrated that, with red phosphorus as a phosphorus source, a Ni2P phase was formed even at a Ni/P molar ratio of 1 : 1. The effects of temperature and pressure on the catalytic activity were investigated. The nickel phosphides proved to be reusable in hydrodechlorination: their catalytic activity remained adequate over five reaction cycles. In contrast, an unphosphided nickel-based catalyst exhibited high activity only in the first to third reaction cycles, after which the dechlorination degree abruptly declined due to the formation of NiCl2.
In Situ Synthesis of Unsupported Nickel Phosphides and Their Activity in 1,4-Dichlorobenzene Hydrodechlorination
https://orcid.org/https://orcid.org/0000-0001-5490-8610
https://orcid.org/https://orcid.org/0000-0002-6125-902X
https://orcid.org/https://orcid.org/0000-0001-8850-2141
A series of unsupported nickel phosphides were synthesized in situ in a reaction mixture under the conditions of hydrodechlorination of 1,4-dichlorobenzene. Triphenylphosphine and red phosphorus were used as phosphorus sources, beneficial in terms of environmental friendliness and cost effectiveness. Using X-ray fluorescence spectrometry, it was demonstrated that, with red phosphorus as a phosphorus source, a Ni2P phase was formed even at a Ni/P molar ratio of 1 : 1. The effects of temperature and pressure on the catalytic activity were investigated. The nickel phosphides proved to be reusable in hydrodechlorination: their catalytic activity remained adequate over five reaction cycles. In contrast, an unphosphided nickel-based catalyst exhibited high activity only in the first to third reaction cycles, after which the dechlorination degree abruptly declined due to the formation of NiCl2.
In Situ Synthesis of Unsupported Nickel Phosphides and Their Activity in 1,4-Dichlorobenzene Hydrodechlorination
https://orcid.org/https://orcid.org/0000-0001-5490-8610
https://orcid.org/https://orcid.org/0000-0002-6125-902X
https://orcid.org/https://orcid.org/0000-0001-8850-2141
A series of unsupported nickel phosphides were synthesized in situ in a reaction mixture under the conditions of hydrodechlorination of 1,4-dichlorobenzene. Triphenylphosphine and red phosphorus were used as phosphorus sources, beneficial in terms of environmental friendliness and cost effectiveness. Using X-ray fluorescence spectrometry, it was demonstrated that, with red phosphorus as a phosphorus source, a Ni2P phase was formed even at a Ni/P molar ratio of 1 : 1. The effects of temperature and pressure on the catalytic activity were investigated. The nickel phosphides proved to be reusable in hydrodechlorination: their catalytic activity remained adequate over five reaction cycles. In contrast, an unphosphided nickel-based catalyst exhibited high activity only in the first to third reaction cycles, after which the dechlorination degree abruptly declined due to the formation of NiCl2.
In Situ Synthesis of Unsupported Nickel Phosphides and Their Activity in 1,4-Dichlorobenzene Hydrodechlorination
Pet. Chem.
Dzhabarov, E. G. (Autor:in) / Kuz’min, V. D. (Autor:in) / Petrukhina, N. N. (Autor:in) / Zakharyan, E. M. (Autor:in)
Petroleum Chemistry ; 64 ; 1169-1178
01.10.2024
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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