Jump to main content
Jump to site search

Issue 3, 2017
Previous Article Next Article

Evaluation of flow schemes for near-neutral pH electrolytes in solar-fuel generators

Author affiliations

Abstract

The electrochemical performance of three different types of membrane-containing electrolyte-flow schemes for solar-driven water splitting has been studied quantitatively using 1-dimensional and 2-dimensional multi-physics models. The three schemes include a recirculation scheme with a well-mixed bulk electrolyte, a recirculation scheme with laminar flow fields, and a fresh-feed scheme with laminar flow fields. The Nernstian potential loss associated with pH gradients at the electrode surfaces, the resistive loss between the cathode and anode, the product-gas crossovers, and the required pumping energy in all three schemes have been evaluated as a function of the operational current density, the flow rates for the electrolyte, and the physical dimensions of the devices. The trade-offs in the voltage loss, safety considerations, and energy inputs from the balance-of-systems required to produce a practical device have been evaluated and compared to membrane-free devices as well as to devices that operate at extreme pH values.

Graphical abstract: Evaluation of flow schemes for near-neutral pH electrolytes in solar-fuel generators

Back to tab navigation

Supplementary files

Publication details

The article was received on 01 Feb 2017, accepted on 23 Feb 2017 and first published on 23 Feb 2017


Article type: Paper
DOI: 10.1039/C7SE00062F
Citation: Sustainable Energy Fuels, 2017,1, 458-466
  •   Request permissions

    Evaluation of flow schemes for near-neutral pH electrolytes in solar-fuel generators

    M. R. Singh, C. Xiang and N. S. Lewis, Sustainable Energy Fuels, 2017, 1, 458
    DOI: 10.1039/C7SE00062F

Search articles by author

Spotlight

Advertisements