Performance Enhancement for Electrolytic Systems through the Application of a Cobalt-based Heterogeneous Water Oxidation Catalyst
| Autor: | Aaron J. Bloomfield, Stafford W. Sheehan, Samuel L. Collom, Paul T. Anastas |
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| Rok vydání: | 2015 |
| Předmět: |
Electrolysis
Materials science Renewable Energy Sustainability and the Environment General Chemical Engineering Catalyst support Inorganic chemistry Alkaline water electrolysis General Chemistry Heterogeneous catalysis Electrocatalyst Catalyst poisoning Catalysis law.invention law Environmental Chemistry Heterogeneous water oxidation |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 3:1234-1240 |
| ISSN: | 2168-0485 |
| DOI: | 10.1021/acssuschemeng.5b00229 |
| Popis: | We report a heterogeneous cobalt–phosphine-based water oxidation catalyst that was produced by thermal synthesis, and can be easily and rapidly deposited onto a variety of substrates from a suspension. Application of the catalyst dramatically improved the oxygen evolution efficiency and corrosion-resistance of stainless steel, nickel and copper anodes in alkaline media. More than 20 g of catalyst was prepared in a single batch, and it was shown to be effective at surface loadings as low as 20 μg/cm2. The catalyst was investigated in three different systems: (1) An alkaline electrolyzer with stainless steel electrodes activated with the catalyst supported 120–200% of the current density of an unactivated but otherwise identical electrolyzer, over a range of applied potentials, and maintained this improved efficiency throughout 1495 h of continuous use in 1 M NaOH. (2) Copper anodes were activated and protected from corrosion in dilute sodium hydroxide for 8 h of electrolysis, before a steady decrease in pe... |
| Databáze: | OpenAIRE |
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