CATALYST EVALUATION FOR A SULFUR DIOXIDE-DEPOLARIZED ELECTROLYZER

Journal Article · Wed Jan 31 00:00:00 EST 2007 · Electrochemical and Solid-State Letters

OSTI ID:899310

Hobbs, D; Hector Colon-Mercado, H

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.

• Research Organization: Savannah River Site (SRS), Aiken, SC (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: DE-AC09-96SR18500
• OSTI ID: 899310
• Report Number(s): WSRC-STI-2007-00060; TRN: US200708%%245
• Journal Information: Electrochemical and Solid-State Letters, Journal Name: Electrochemical and Solid-State Letters
• Publisher: pubinfo
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
CATALYSTS
ELECTROCATALYSTS
EVALUATION
HYDROGEN
PALLADIUM
PLATINUM
STABILITY
SULFUR
SULFUR DIOXIDE
SULFURIC ACID
TESTING
THERMOCHEMICAL PROCESSES