General scheme of adsorption, electroreduction and catalytic hydrogenation of nitro-compounds of platinum—I. Kinetics and mechanism of adsorption

Vassiliev, Yu.B.; Bagotzky, V.S.; Хазова, О. А.; Krasnova, N.N.; Sergeeva, T.A.; Bogdanovich, V. B.

doi:10.1016/0013-4686(81)87036-3

Cited by 27 publications

(5 citation statements)

References 18 publications

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“…On the contrary, the yields of NO hydrogenation remained the same even at higher temperatures (Figure 7b). This performance should result from the strong coupling effect between the nitro group and the Pt nanoparticle after adsorption (Figures S10 and S11), 55 which endowed the catalyst with the capability to efficiently extract photoinduced electrons from CN (prior to recombination) even at elevated temperatures.…”

Section: ■ Introductionmentioning

confidence: 99%

Beyond Hydrogen Evolution: Solar-Driven, Water-Donating Transfer Hydrogenation over Platinum/Carbon Nitride

Han

Konarova

et al. 2020

ACS Catal.

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Hydrogen-rich organic molecules such as alcohols are widely used as hydrogen donors in transfer hydrogenation. Nevertheless, water as a more abundant and eco-friendly hydrogen source has hardly been used due to the high difficulty in splitting water molecules. Herein, we designed a photocatalytic water-donating transfer hydrogenation (PWDTH) technique, in which hydrogen was extracted from water under light illumination and then in situ added to different unsaturated bonds (C=C, C=O, N=O) for chemical synthesis. Platinum loaded carbon nitride (Pt/CN) was used as the model catalyst for this cascade reaction, which is beyond its normal applications for water splitting. This approach was highly accessible to efficiency optimization, either by modifying CN for extended light absorption and enhanced charge transfer, or by alloying Pt with another metal for better catalytic activities. Remarkably, a quantum efficiency up to 21.8% was achieved for nitrobenzene hydrogenation under 380 nm irradiation which is 3 times higher than that obtained in a single water splitting reaction, indicating the PWDTH can be more rewarding than hydrogen evolution for solar energy harvesting. Deep insights into the underlying mechanism was provided by detailed measurements and interpretations of femtosecond transient absorption spectra, action spectra (quantum efficiency as a function of excitation wavelength) and reaction kinetic profiles under varied conditions including the variation of light intensities, temperatures and water isotopes. The mild Page 1 of 22 ACS Paragon Plus Environment ACS Catalysis 2 reaction conditions, simple processing and broad substituent group tolerance endow this approach a high potential toward a general solar to chemical conversion technique.

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Section: ■ Introductionmentioning

confidence: 99%

Beyond Hydrogen Evolution: Solar-Driven, Water-Donating Transfer Hydrogenation over Platinum/Carbon Nitride

Han

Konarova

et al. 2020

ACS Catal.

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“…It is supposed to bring about N Pt or O Pt bonds formation, because there are potential dependencies for adsorptions of nitro compounds [21,22]. As to X p that varies symmetrically to R p in general, the difference between presence and absence of nitro group is more obvious than R p especially between −0.2 and 0 V, where the gentle decrement is observed only in the case of nitro compounds.…”

Section: Responses To Aromatic Nitro Compounds With Bare Ptmentioning

confidence: 95%

Detection of aromatic nitro compounds with electrode polarization controlling sensor

Masunaga

Hayama

Onodera

et al. 2005

Sensors and Actuators B: Chemical

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“…Yu. B. Vasilyev 25,26 proposed a mechanism for the hydrogenation of nitro compounds on Pt, proceeding along the hydrogenation pathway. The reaction can proceed via the O-Pt or N-Pt bond with the desorption of products of incomplete reduction of the NB into the volume (Figure 4).…”

Section: Experimental Study Of the Mechanism Of Nitro Compounds Reduction Haber-lukashevich' Mechanism Ideas Of V P Shmoninamentioning

confidence: 99%

“…nitroarenes are adsorbed on the catalyst by nitrogen and oxygen atoms of the nitro group [25][26][27]42 and create a positive charge on its surface 39,43 palladium adsorbed on coal is also positively charged 30 . 6) the process of catalytic hydrogenation of nitroarenes is limited by a chemical act on the catalyst surface, while the rate of the determining step is the addition of the first hydrogen atom 2,38 .…”

Section: )mentioning

confidence: 99%

Studying the Mechanisms of Nitro Compounds Reduction (A-Review)

et al. 2019

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The article describes some variants of mechanisms of nitro compounds reduction, offered by authors in the scientific literature. The focus is on the description of the work of Kazakh and Russian chemists working in the field of catalysis. In most of the works, the classical scheme of the mechanism of the hydrogenation of Haber-Lukashevich nitrobenzene is confirmed and detailed by experimental methods. One of the interesting aspect of the article is description the mechanism of Ya.A. Dorfman which used the orbital theory of catalysis. The orbital approach of the Ya.A. Dorfman mechanism is constructed in the light of modern orbital representations and is valid for the hydrogenation of the nitro group on various catalysts. Among the discussed mechanisms are ideas of Haber, Debus, Jungers, V.P. Shmonina, Lukashevich, M. Geirovsky, Yu. B. Vasilyev, M.V. Klyuev, E.F. Weinstein, E. Gelder, Ya.A. Dorfman and others.

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General scheme of adsorption, electroreduction and catalytic hydrogenation of nitro-compounds of platinum—I. Kinetics and mechanism of adsorption

Cited by 27 publications

References 18 publications

Beyond Hydrogen Evolution: Solar-Driven, Water-Donating Transfer Hydrogenation over Platinum/Carbon Nitride

Beyond Hydrogen Evolution: Solar-Driven, Water-Donating Transfer Hydrogenation over Platinum/Carbon Nitride

Detection of aromatic nitro compounds with electrode polarization controlling sensor

Studying the Mechanisms of Nitro Compounds Reduction (A-Review)

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