Microwave synthesis of cobalt tungstate for use as stable oxygen evolution catalyst
AssigneeToyota Motor Engineering & Manufacturing North America, Inc.
InventorsHongfei Jia, Kenneth James McDonald
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Abstract
A process of forming an oxygen evolution catalyst includes the steps of: providing Co(NO3)4; providing Na2WO4; combining the Co(NO3)4 and Na2WO4 forming a solution; exposing the solution to a source of microwave energy and initiating a hydrothermal reaction forming hydrated CoWO4. The oxygen evolution catalyst including hydrated CoWO4 may be used to split water into oxygen and hydrogen ions.
Claims17
An oxygen evolution catalyst splitting water into oxygen and hydrogen ions comprising hydrated Cobalt Tungstate having a hydrated pseudo crystalline phase of the formula:
- CoWO4 xH2O wherein x is 1.2 to 1.7.
A process for oxidizing water, the process comprising:
- providing hydrated Cobalt Tungstate having a hydrated pseudo crystalline phase of the formula:
- CoWO4 xH2O wherein x is 1.2 to 1.7;
- providing water;
- and
- placing the water into contact with the hydrated Cobalt Tungstate, the hydrated Cobalt Tungstate catalyzing the oxidation of water.
A process for forming an oxygen evolution catalyst including the steps of:
- providing Co(NO2)4;
- providing Na2WO4;
- combining the Co(NO3)4 and Na2WO4 forming a solution;
- exposing the solution to a source of microwave energy and initiating a hydrothermal reaction forming hydrate CoWO4 having a hydrated pseudo crystalline phase of the formula:
- CoWO4 xH2O wherein x is 1.2 to 1.7.
Dependencies are inferred from the claim text.