CATALYST EVALUATION FOR A SULFUR DIOXIDE-DEPOLARIZED ELECTROLYZER

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Thermochemical processes are being developed to provide global-scale quantities of hydrogen. A variant on sulfur-based thermochemical cycles is the Hybrid Sulfur (HyS) Process which uses a sulfur dioxide depolarized electrolyzer (SDE) to produce the hydrogen. Testing examined the activity and stability of platinum and palladium as the electrocatalyst for the SDE in sulfuric acid solutions. Cyclic and linear sweep voltammetry revealed that platinum provided better catalytic activity with much lower potentials and higher currents than palladium. Testing also showed that the catalyst activity is strongly influenced by the concentration of the sulfuric acid electrolyte.

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Hobbs, D & Hector Colon-Mercado, H January 31, 2007.

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Thermochemical processes are being developed to provide global-scale quantities of hydrogen. A variant on sulfur-based thermochemical cycles is the Hybrid Sulfur (HyS) Process which uses a sulfur dioxide depolarized electrolyzer (SDE) to produce the hydrogen. Testing examined the activity and stability of platinum and palladium as the electrocatalyst for the SDE in sulfuric acid solutions. Cyclic and linear sweep voltammetry revealed that platinum provided better catalytic activity with much lower potentials and higher currents than palladium. Testing also showed that the catalyst activity is strongly influenced by the concentration of the sulfuric acid electrolyte.

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  • Journal Name: Electrochemical and Solid-State Letters

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  • Report No.: WSRC-STI-2007-00060
  • Grant Number: DE-AC09-96SR18500
  • Office of Scientific & Technical Information Report Number: 899310
  • Archival Resource Key: ark:/67531/metadc877581

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Office of Scientific & Technical Information Technical Reports

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  • January 31, 2007

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  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 9, 2016, 10:56 p.m.

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Hobbs, D & Hector Colon-Mercado, H. CATALYST EVALUATION FOR A SULFUR DIOXIDE-DEPOLARIZED ELECTROLYZER, article, January 31, 2007; [Aiken, South Carolina]. (digital.library.unt.edu/ark:/67531/metadc877581/: accessed April 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.