4‑Nitrophenol Reduction: Probing the Putative Mechanism of the Model Reaction
We report a reinterpretation of the reduction of 4-nitrophenol catalyzed by silver nanoparticles. Mass spectrometry and ultraviolet–visible light spectroscopy measurements support the existence of 4-nitrosophenol as a stable reaction intermediate. We propose that dissolved oxygen is consumed, both b...
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| Veröffentlicht in: | ACS catalysis 2020-05, Vol.10 (10), p.5516-5521 |
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| container_title | ACS catalysis |
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| creator | Strachan, Jyah Barnett, Christopher Masters, Anthony F Maschmeyer, Thomas |
| description | We report a reinterpretation of the reduction of 4-nitrophenol catalyzed by silver nanoparticles. Mass spectrometry and ultraviolet–visible light spectroscopy measurements support the existence of 4-nitrosophenol as a stable reaction intermediate. We propose that dissolved oxygen is consumed, both by oxidizing 4-nitrosophenol (an intermediate) and reoxidizing the reduced catalyst surface, resulting in the commonly observed “induction period” in the reaction kinetics. Upon complete consumption of dissolved oxygen, subsequent reduction to 4-aminophenol can occur. A complete kinetic analysis including modeling is presented, conceptually fitting data from recent reports in the literature, as well as fitting data from our own experiments. |
| doi_str_mv | 10.1021/acscatal.0c00725 |
| format | Article |
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Mass spectrometry and ultraviolet–visible light spectroscopy measurements support the existence of 4-nitrosophenol as a stable reaction intermediate. We propose that dissolved oxygen is consumed, both by oxidizing 4-nitrosophenol (an intermediate) and reoxidizing the reduced catalyst surface, resulting in the commonly observed “induction period” in the reaction kinetics. Upon complete consumption of dissolved oxygen, subsequent reduction to 4-aminophenol can occur. 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Mass spectrometry and ultraviolet–visible light spectroscopy measurements support the existence of 4-nitrosophenol as a stable reaction intermediate. We propose that dissolved oxygen is consumed, both by oxidizing 4-nitrosophenol (an intermediate) and reoxidizing the reduced catalyst surface, resulting in the commonly observed “induction period” in the reaction kinetics. Upon complete consumption of dissolved oxygen, subsequent reduction to 4-aminophenol can occur. 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| subjects | Chemistry Chemistry, Physical Physical Sciences Science & Technology |
| title | 4‑Nitrophenol Reduction: Probing the Putative Mechanism of the Model Reaction |
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