Multielectron-photoinduced reduction of chloroplatinum complexes: visible light deposition of platinum metal

Cameron, R. E.; Bocarsly, Andrew Bruce

doi:10.1021/ic00236a053

Cited by 71 publications

(33 citation statements)

References 2 publications

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“…The best-known application is in photocatalysis. The four-electron photoreduction of Pt IV to Pt 0 inwater-alcohol mixtures discovered by Cameron and Bocarsly [13,14] initiated the use of Pt IV Cl 6 2À photolysis to produce platinum nanoparticles [15][16][17][18][19][20][21][22]. Generally, the direct photoreduction of metal cations has been established as an important method to produce nanoparticles that are free from chemical reducing agents (see [15] and references therein).…”

Section: Introductionmentioning

confidence: 99%

Primary reactions in the photochemistry of hexahalide complexes of platinum group metals: A minireview

Glebov

Pozdnyakov

Plyusnin

et al. 2015

Journal of Photochemistry and Photobiology C: Photochemistry Re

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Section: Introductionmentioning

confidence: 99%

Primary reactions in the photochemistry of hexahalide complexes of platinum group metals: A minireview

Glebov

Pozdnyakov

Plyusnin

et al. 2015

Journal of Photochemistry and Photobiology C: Photochemistry Re

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“…Thus, a Cl atom in [PtCl 4 ] 2− must be substituted by CH 3 O − to form [PtCl 3 (CH 3 O)] 2− as the reducing agent must occupy a reaction site, shown inFigure 4c 31. …”

mentioning

confidence: 99%

Initial Reaction Mechanism of Platinum Nanoparticle in Methanol–Water System and the Anomalous Catalytic Effect of Water

et al. 2015

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Understanding the detailed reaction mechanism in the early stage of noble metal nanoparticles is very critical for controlling the final crystal's size, morphology, and properties. Here, we report a systematic study on the initial reaction mechanism of Pt nanoparticles in methanol-water system and demonstrate an anomalous catalytic effect of H2O on the reduction of H2PtCl6 to Pt nanoparticles using a combination of UV-vis, X-ray absorption spectroscopy (XAS), liquid chromatography mass spectrometry (LCMS), and first-principles calculation methods. The observations reveal the transformation route [PtCl6](2-) → [PtCl5(CH3O)](2-) → [PtCl4](2-) → [PtCl3(CH3O)](2-) → [PtCl2](2-) and finally to form Pt nanoparticles in a pure CH3OH solution. With 10 vol % water adding in the CH3OH solution, a new and distinct chemical reduction pathway is found in which the precursors change from [PtCl6](2-) to [PtCl5(CH3O)(H2O)](2-) to [PtCl4](2-) to [PtCl3(CH3O)(H2O)](2-) to [PtCl2](2-) and to Pt nanoparticles. Notably, the supernumerary water molecular can significantly accelerate the rate of chemical reduction and greatly shorten the reaction time. This work not only elucidates the initial reaction mechanism of Pt nanoparticles but also highlights the pronounced influence of H2O on the reaction pathway, which will provide useful insights for understanding the formation mechanism of noble metal nanoparticles and open up a high efficient way to synthesize new functional nanomaterial.

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“…Chlorinated metal complexes in liquid solution, such as CPA or CAA, are absorbed in a wide UV spectral range that extends over the emission range of our UVA lamps. Thus, as will be illustrated in Section 3.4, in the case of CAA, these complexes undergo a multistep photolytic reduction when exposed to our UVA lamps, without the need of any reductive additive in the solution [41]. In the case of platinum complex, this mechanism initially involves a photo-induced homolytic cleavage of the Pt-Cl bond, inducing a first reduction of Pt 4þ ions and the formation of Cl (chlorine radical) radicals.…”

Section: Aip Platinisation Protocolsmentioning

confidence: 90%

Synthesis and functionalities of noble metal nanoparticles formed through simple all-inorganic photochemical procedures

Riassetto¹,

Roussel²,

Rapenne³

et al. 2010

Journal of Experimental Nanoscience

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The photochemical reduction of metal precursors under UV light has been studied to produce noble metal nanoparticles. Depending on the metal (Pt, Au or Ag) and precursor (chlorinated or nitrate) natures, different 1-step or 2-step photolytic or photocatalytic reduction mechanisms have been investigated. These mechanisms yield simple all-inorganic methods to generate metal nanoparticles in liquid medium and disperse these particles at the surface of various kinds of supports. Depending on the metal particle and support natures, different functionalities can arise from such easy and low-cost photometallisation methods.

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Multielectron-photoinduced reduction of chloroplatinum complexes: visible light deposition of platinum metal

Cited by 71 publications

References 2 publications

Primary reactions in the photochemistry of hexahalide complexes of platinum group metals: A minireview

Primary reactions in the photochemistry of hexahalide complexes of platinum group metals: A minireview

Initial Reaction Mechanism of Platinum Nanoparticle in Methanol–Water System and the Anomalous Catalytic Effect of Water

Synthesis and functionalities of noble metal nanoparticles formed through simple all-inorganic photochemical procedures

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