Rhodium and rhodium sulfide coated cadmium sulfide as a photocatalyst for photochemical decomposition of aqueous sulfide

Rufus, Isaac B.; Ramakrishnan, V.; Viswanathan, B.; Kuriacose, J. C.

doi:10.1021/la00093a008

Cited by 23 publications

(14 citation statements)

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“…Rhodium sulfides are attracting more and more research interest due to their applications in hydrodesulfurization (HDS), 1 photochemical decomposition of aqueous sulfide, 2 and oxygen reduction reaction. 3 The rhodium sulfides system consists of Rh 2 S 3 , Rh 3 S 4 , and Rh 17 S 15 .…”

Section: Introductionmentioning

confidence: 99%

Phase Controllable Synthesis of Well-Crystallized Rhodium Sulfides by the Hydrothermal Method

Zhang

Yanagisawa

Kamiya

et al. 2009

Crystal Growth & Design

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We developed a simple hydrothermal method to synthesize crystalline Rh 2 S 3 and Rh 17 S 15 at 400°C for 5 h with a S/Rh molar ratio of 3 and 0.9, respectively. The formation mechanisms of the rhodium sulfides were proposed by decomposition of the CO ligand and sulfur incorporation during the hydrothermal reaction. The crystallization of the sulfides was closely related to the S/Rh ratio, reaction temperature, and reaction time. The formation of Rh 2 S 3 requires abundant sulfur (S/Rh ) 3), while Rh 17 S 15 can be synthesized with a stoichiometric composition (S/Rh ) 0.9). The thermal analysis shows that the low crystalline products obtained by hydrothermal reactions at 220°C with S/Rh ) 3 and 0.9 crystallize to Rh 2 S 3 and Rh 17 S 15 at 400 and 310°C, respectively. However, calcination of Rh 2 S 3 at high temperatures in Ar is accompanied by the release of sulfur, which finally results in the transformation of Rh 2 S 3 into Rh 3 S 4 and Rh 17 S 15 at 700°C.

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Section: Introductionmentioning

confidence: 99%

Phase Controllable Synthesis of Well-Crystallized Rhodium Sulfides by the Hydrothermal Method

Zhang

Yanagisawa

Kamiya

et al. 2009

Crystal Growth & Design

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“…9 The coverage of ZnO nanobars by a window layer of CdS can be obtained. 14,20 , which increases the photocatalyst price. Out of these metals, palladium has the lowest price.…”

Section: −mentioning

confidence: 99%

“…In order to facilitate electron transfer from the CdS conduction band to the water molecule, CdS is often decorated with noble metals like Pt, 14,15 Pd, 14−17 Ru, 14,18,19 and Rh 14,20 , which increases the photocatalyst price. Out of these metals, palladium has the lowest price.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of PdS/ZnS--CdS-type photocatalysts using ZnS as sulphide source

Banica¹,

Linul²,

Mosoarca³

2017

Turk J Chem

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In this work, a new method for the growth of large CdS crystals into PdS/ZnS-CdS-type photocatalysts is presented. In order to accomplish this, in the first stage zinc sulphide was synthesised and hydrothermally crystallised.In the second stage, after PdS decoration, the recrystallised zinc sulphide was utilised as sulphur source for the synthesis of PdS/ZnS-CdS-type photocatalysts. The photocatalysts were characterised by X-ray diffraction, transmission electron microscopy, energy dispersive X-ray spectroscopy, and diffuse reflectance spectroscopy. In the third stage magnetic polymer supports were manufactured and loaded with photocatalyst. Finally photocatalysis experiments under blue light illumination were conducted for the hydrogen evolution reaction in the presence of sulphite and sulphide ions on both suspension and polymer supported photocatalysts. The photocatalysts' efficiency increased by about 70% along with the PdS quantity increase from 0.11% to 0.89%. The use of magnetic polymer may be a solution for reducing the costs necessary to maintain the photocatalysts in suspension.

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“…Rhodium suldes are gaining signicant attention because of the prospects as catalysts in hydrodesulfurization, 1,2 photochemical decomposition of aqueous sulde 3 and in oxygen reduction reaction (ORR) for fuel cells and electrolysis. [4][5][6][7][8][9][10][11] In the particular case of hydrochloric acid electrolysis, Pt, known as the most effective catalyst for ORR, has been shown to be of poor stability in the highly corrosive conditions of hydrochloric acid and be constantly poisoned by dissolved chloride ions and various dissolved organic contaminants in the electrolyte in which its electrocatalytic performance would be readily and substantially deteriorated.…”

Section: Introductionmentioning

confidence: 99%

In situ synthesis of well crystallized rhodium sulfide/carbon composite nanospheres as catalyst for hydrochloric acid electrolysis

Yanagisawa

et al. 2014

J. Mater. Chem. A

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Rhodium sulfide/carbon nanocomposites were synthesized via a one-step alcohol-thermal method at 400 C from Rh 6 (CO) 16 and elemental S. Characterizations by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy revealed that the products were composed of amorphous carbon with spherical morphology and numerous highly crystallized Rh 2 S 3 /Rh 17 S 15 nanocrystals, presented as uniform size composite nanospheres of 45-90 nm diameter. The crystallographic composition of rhodium sulfide in those composites depended on the initial S/Rh molar ratio and utilized solvent. Such hybrid nanomaterials displayed good dispersion of the rhodium sulfide nanoparticles, high surface area and extraordinary thermal/chemical resistance, making them attractive materials for electrocatalytic application of HCl electrolysis. Cyclic voltammetry and rotating disk electrode measurements were employed to evaluate the catalytic performance for oxygen reduction reaction in HCl electrolysis. It was illustrated that all rhodium sulfide/carbon nanocomposites were active towards oxygen reduction reaction. Especially, the catalyst synthesized in ethanol containing Rh 17 S 15 phase outperformed commercial Pt/C in stability. Recently, our group reported hydrothermal and xylenethermal synthesis of rhodium suldes. 24,25 Both methods led to well-crystallized Rh 2 S 3 or Rh 17 S 15 phase, depending on the initial S/Rh molar ratio in the raw materials. The solvothermal reaction conducted in xylene gives rise to products with higher

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Rhodium and rhodium sulfide coated cadmium sulfide as a photocatalyst for photochemical decomposition of aqueous sulfide

Cited by 23 publications

References 0 publications

Phase Controllable Synthesis of Well-Crystallized Rhodium Sulfides by the Hydrothermal Method

Phase Controllable Synthesis of Well-Crystallized Rhodium Sulfides by the Hydrothermal Method

Synthesis of PdS/ZnS--CdS-type photocatalysts using ZnS as sulphide source

In situ synthesis of well crystallized rhodium sulfide/carbon composite nanospheres as catalyst for hydrochloric acid electrolysis

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