@article {996,
	title = {Catalyst evaluation for a sulfur dioxide-depolarized electrolyzer},
	journal = {Electrochemistry Communications},
	volume = {9},
	year = {2007},
	note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright}
{\textquoteright}\n - jyoungstrom{\textquoteright}
{\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright}
{\textquoteright}\n - estechel{\textquoteright}
},
	pages = {2649-2653},
	abstract = {Published on November 1st, 2007.
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 highly concentrated 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.},
	issn = {1388-2481},
	doi = {10.1016/j.elecom.2007.08.015},
	url = {http://www.sciencedirect.com/science/article/pii/S1388248107003451},
	author = {H{\'e}ctor R. Col{\'o}n-Mercado and David T. Hobbs}
}
@article {997,
	title = {Evaluation of proton-conducting membranes for use in a sulfur dioxide depolarized electrolyzer},
	journal = {Journal of Power Sources},
	volume = {195},
	note = {{\textquoteright}doi: 10.1021/acsenergylett.0c01132\n - I.Am.Hydrogen{\textquoteright}
{\textquoteright}\n - jyoungstrom{\textquoteright}
{\textquoteright}Jason thinks this is great.\n~\n - jyoungstrom{\textquoteright}
{\textquoteright}\n - estechel{\textquoteright}
},
	pages = {2823-2829},
	abstract = {The chemical stability, sulfur dioxide transport, ionic conductivity, and electrolyzer performance have been measured for several commercially available and experimental proton exchange membranes (PEMs) for use in a sulfur dioxide depolarized electrolyzer (SDE). The SDEs function is to produce hydrogen by using the Hybrid Sulfur (HyS) Process, a sulfur-based electrochemical/thermochemical hybrid cycle. Membrane stability was evaluated using a screening process where each candidate PEM was heated at 80{\textdegree}C in 60wt\% H2SO4 for 24h. Following acid exposure, chemical stability for each membrane was evaluated by FTIR using the ATR sampling technique. Membrane SO2 transport was evaluated using a two-chamber permeation cell. SO2 was introduced into one chamber whereupon SO2 transported across the membrane into the other chamber and oxidized to H2SO4 at an anode positioned immediately adjacent to the membrane. The resulting current was used to determine the SO2 flux and SO2 transport. Additionally, membrane electrode assemblies (MEAs) were prepared from candidate membranes to evaluate ionic conductivity and selectivity (ionic conductivity vs. SO2 transport) which can serve as a tool for selecting membranes. MEAs were also performance tested in a HyS electrolyzer measuring current density vs. a constant cell voltage (1V, 80{\textdegree}C in SO2 saturated 30wt\% H2SO4). Finally, candidate membranes were evaluated considering all measured parameters including SO2 flux, SO2 transport, ionic conductivity, HyS electrolyzer performance, and membrane stability. Candidate membranes included both PFSA and non-PFSA polymers and polymer blends of which the non-PFSA polymers, BPVE-6F and PBI, showed the best selectivity.},
	issn = {0378-7753},
	doi = {10.1016/j.jpowsour.2009.11.031},
	url = {http://www.sciencedirect.com/science/article/pii/S0378775309020394},
	author = {Mark C. Elvington and Hector Colon-Mercado and Steve McCatty and Simon G. Stone and David T. Hobbs}
}
