Influence of d-state density and chemistry of transition metal cluster selenides on electrocatalysis

Vante, N. Alonso

doi:10.1016/0021-9517(88)90152-2

Cited by 57 publications

(14 citation statements)

References 14 publications

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“…Based on the statistics of the calculated possible combinations and taking again into account the density of d states, the complex IV must play a major role in the ORR electrocatalytic materials activity. Because the catalytic properties and the high density of d states at the Fermi level can be related, this relation on Mo4Ru2Se8, Mo2Re4se8, Mo6Se8, and the Mo metal was undertaken [72]. Indeed, Mo6Se8 showed metallic properties, whereas Mo4Ru2Se8 and Mo2Re4Se8 showed semiconducting properties.…”

Section: Transition Metal Chalcogenidesmentioning

confidence: 99%

Section: Transition Metal Chalcogenidesmentioning

confidence: 99%

“…[72]. Reprinted with permission from [72]. Copyright Elsevier, 1998. Based on these Chevrel phase model compounds, prepared in quartz ampoule at high temperature [67], Mo-Ru-Se, in powder and/or in thin layer form, was synthesized via a soft chemical method; the carbonyl chemical route by reacting molybdenum hexacarbonyl, tris-ruthenium dodecacarbonyl and selenium powder in xylene [75].…”

Section: Transition Metal Chalcogenidesmentioning

confidence: 99%

“…Adapted from [72,73]. Reprinted with permission from [72]. Copyright Elsevier, 1988. These compounds were evaluated towards HER and ORR.…”

Section: Transition Metal Chalcogenidesmentioning

confidence: 99%

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What Can We Learn in Electrocatalysis, from Nanoparticulated Precious and/or Non-Precious Catalytic Centers Interacting with Their Support?

2016

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This review is devoted to discussing the state of the art in the relevant aspects of the synthesis of novel precious and non-precious electrocatalysts. It covers the production of Pt-and Pd-based electrocatalysts synthesized by the carbonyl chemical route, the synthesis description for the preparation of the most catalytically active transition metal chalcogenides, then the employment of free-surfactants synthesis routes to produce non-precious electrocatalysts. A compilation of the best precious electrocatalysts to perform the hydrogen oxidation reaction (HOR) is described; a section is devoted to the synthesis and electrocatalytic evaluation of non-precious materials which can be used to perform the HOR in alkaline medium. Apropos the oxygen reduction reaction (ORR), the synthesis and modification of the supports is also discussed as well, aiming at describing the state of the art to improve kinetics of low temperature fuel cell reactions via the hybridization process of the catalytic center with a variety of carbon-based, and ceramic-carbon supports. Last, but not least, the review covers the experimental half-cells results in a micro-fuel cell platform obtained in our laboratory, and by other workers, analyzing the history of the first micro-fuel cell systems and their tailoring throughout the time bestowing to the design and operating conditions.

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Section: Transition Metal Chalcogenidesmentioning

confidence: 99%

Section: Transition Metal Chalcogenidesmentioning

confidence: 99%

Section: Transition Metal Chalcogenidesmentioning

confidence: 99%

“…Adapted from [72,73]. Reprinted with permission from [72]. Copyright Elsevier, 1988. These compounds were evaluated towards HER and ORR.…”

Section: Transition Metal Chalcogenidesmentioning

confidence: 99%

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What Can We Learn in Electrocatalysis, from Nanoparticulated Precious and/or Non-Precious Catalytic Centers Interacting with Their Support?

2016

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“…[3,9] For example, some consider that a link between electrochemical activity and band structure of the solid exists, [10] or that the metal-oxygen binding energy plays a role in determining activity [11] and for mixed-metal oxides, the presence of oxygen vacancies may be important. [12] Ruthenate and iridate pyrochlore oxides have individually been studied for their activity in electrocatalysis, including the materials Bi 2 Ru 2 O 7Àd , Bi 2 Ir 2 O 7 , and Pb 2 (Pb,M) 2 O 7Àd (M = Ru or Ir).…”

Section: And D)mentioning

confidence: 99%

Water‐Splitting Electrocatalysis in Acid Conditions Using Ruthenate‐Iridate Pyrochlores

et al. 2014

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The pyrochlore solid solution (Na 0.33 Ce 0.67 ) 2 -(Ir 1Àx Ru x ) 2 O 7 (0 x 1), containing B-site Ru IV and Ir IV is prepared by hydrothermal synthesis and used as a catalyst layer for electrochemical oxygen evolution from water at pH < 7. The materials have atomically mixed Ru and Ir and their nanocrystalline form allows effective fabrication of electrode coatings with improved charge densities over a typical (Ru,Ir)O 2 catalyst. An in situ study of the catalyst layers using XANES spectroscopy at the Ir L III and Ru K edges shows that both Ru and Ir participate in redox chemistry at oxygen evolution conditions and that Ru is more active than Ir, being oxidized by almost one oxidation state at maximum applied potential, with no evidence for ruthenate or iridate in + 6 or higher oxidation states.The electrochemical splitting of water is of significant relevance for contemporary energy applications, playing a key role in applications such as water-splitting electrolyzers for hydrogen production, and in reversible fuel cells for clean electricity production.

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Combinatorial catalyst development methods

Mallouk

Smotkin

2010

Handbook of Fuel Cells

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Combinatorial chemistry provides a means of rapidly screening electrocatalysts for use in fuel cells and related applications. The screening methods that have so far been applied to electrocatalyst arrays include indirect fluorescent detection, steady‐state voltammetry, chronoamperometry, and scanning electrochemical microscopy. Several different types of anode and cathode electrocatalysts for polymer electrolyte membrane fuel cells have been studied by these techniques. Heuristic models based on mechanistic and spectroscopic studies of fuel cell catalysis are useful in guiding these searches for new catalyst compositions, and detailed studies of the catalysts already discovered can help to refine or augment these models. One of the outstanding challenges remaining in this area is to find ways to match more closely the synthesis/screening conditions of array catalysts with those of bulk catalysts used in real fuel cells.

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Influence of d-state density and chemistry of transition metal cluster selenides on electrocatalysis

Cited by 57 publications

References 14 publications

What Can We Learn in Electrocatalysis, from Nanoparticulated Precious and/or Non-Precious Catalytic Centers Interacting with Their Support?

What Can We Learn in Electrocatalysis, from Nanoparticulated Precious and/or Non-Precious Catalytic Centers Interacting with Their Support?

Water‐Splitting Electrocatalysis in Acid Conditions Using Ruthenate‐Iridate Pyrochlores

Combinatorial catalyst development methods

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