Complexes for Catalytic Water Oxidation

Product # Description Sizes
27-0477 Cobalt-dppe heterogeneous water oxidation catalyst (~17%-Co) 100 mg
500 mg
77-0025 [2-(Pyridine-2-yl)-2-propanato]iridium(IV) dimer solution 97% (1 mM in 0.1 Molar aqueous NaIO3) 10 ml
50 ml
77-0030 Antimony Tin Oxide/Iridium Het-WOC core/shell nanopowder, 20 nm (conductive and acid-stable) 250 mg
1 g
77-0035 Antimony Tin Oxide/Iridium Het-WOC core/shell nanopowder, 50 nm (conductive and acid-stable) 250 mg
1 g
77-0040 Antimony Tin Oxide/Iridium Het-WOC core/shell nanopowder, 100 nm (conductive and acid-stable) 250 mg
1 g
07-3333 2-(Pyridine-2-yl)propan-2-ol, min. 95% pyalc 100 mg
500 mg
2 g

Applications

  • OER scaffold in electrolysis
  • ORR scaffold in fuel cells
  • Corrosion resistance
  • Wastewater remediation
  • Oxidation catalysis

Ligand also available:
07-3333

Cobalt Catalyst and Nitrogen Ligand

. . .
27-0477 Cobalt-dppe heterogeneous water oxidation catalyst (~17%-Co)
(C26H24CoP2); light-brown powder.
100 mg
500 mg
07-3333 2-(Pyridine-2-yl)propan-2-ol, min. 95% pyalc
(C8H11NO); F.W. 137.18; white xtl.
100 mg
500 mg
2 g

Molecular Iridium Monolayer

77-0025 2-(pyridine-2-yl)-2-propanato]iridium(IV) dimer solution 97% (1 mM in 0.1 Molar aqueous NaIO3)
(C16H28Ir2N2O8); F.W. 728.84; blue liq.
10 ml
50 ml

Standard Operating Procedure

Material heterogenization is a simple process and can be carried out in the following conditions: at ambient temperature, in air, with no additives, applied potential or other treatments. For most metal oxide or carbon-based substrates:

  1. Dip the substrate in het-WOC deposition solution (or disperse powders, if powder).
  2. Wait 4 to 12 hours (typically overnight).
  3. Remove the substrate from solution (or filter out powder) and wash with clean water.

This will result in the deposition of the monolayer Ir material on the substrate, with a surface structure as shown1 (TEM image on iron oxide shown to the right):

In order to increase the coverage of het-WOC deposition solution across large substrates, the solution can be diluted.

As mentioned in the SDS, the het-WOC deposition solution mostly contains water, therefore dilution with water is best. Also, the het-WOC deposition solution can be re-used repetitively to load numerous substrates with the Ir monolayer. Each loading employs just a small amount of the Ir present in solution, albeit this depends on the substrate’s surface area.

Acid Stable Iridium-Decorated Conductive Oxides

Product Number Product Description Particle Size BET Surface area Resisitivity
77-0030 Antimony Tin Oxide/Iridium Het-WOC core/shell nanopowder, 20 nm (conductive and acid-stable) 20 nm 50 - 60 m2/g 0.3 - 0.7 Ω•cm
77-0035 Antimony Tin Oxide/Iridium Het-WOC core/shell nanopowder, 50 nm (conductive and acid-stable) 50 nm 40 - 50 m2/g 0.05 - 0.08 Ω•cm
77-0040 Antimony Tin Oxide/Iridium Het-WOC core/shell nanopowder, 100 nm (conductive and acid-stable) 100 nm 5 - 10 m2/g 0.05 - 0.08 Ω•cm

Cyclic voltammogram of 50 nm ATO/het-WOC core/shell nanopowder operating in a test electrolyzer (built-in Hg/HgSO4 reference) for oxygen evolution (blue) compared to a bare 50 nm ATO control (grey). Redox features of the molecular iridium species are present, as well as the catalytic wave for oxygen evolution. Activity persists for over 90 days.

Find Out More About Complexes for Catalytic Water Oxidation

References

  1. J. Am. Chem. Soc., 2013, 135, 10837.
  2. J. Am. Chem. Soc., 2014, 136, 13826.
  3. Nat. Commun., 2015, 6, 6469.
  4. Angew. Chem. Int. Ed., 2015, 54, 11428.
  5. Energy Environ. Sci., 2016, 9, 1794.

This information has been sourced, reviewed and adapted from materials provided by Strem Chemicals.

For more information on this source, please visit Strem Chemicals.

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