Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance upgrade on Thursday 4th of May 2017 from 8.00am to 9.00am (BST).

During this time our websites will be offline temporarily. If you have any questions please use the feedback button on this page. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 7, 2015
Previous Article Next Article

A membrane-less electrolyzer for hydrogen production across the pH scale

Author affiliations

Abstract

The development of deployable water-splitting devices is hindered by the cost of electricity and the lack of stable ion conducting membranes that can operate across the pH scale, impose low ionic resistances and avoid product mixing. The membrane-less approach developed in this work breaks this paradigm and demonstrates for the first time an electrolyzer capable of operating with lower ionic resistance than benchmark membrane-based electrolyzers using virtually any electrolyte. Our method separates product gases by controlling the delicate balance between fluid mechanic forces in the device. The devices presented here are able to split water at current densities over 300 mA cm−2, with more than 42% power conversion efficiency, and crossover of hydrogen gas into the oxidation side as low as 0.4%, leading to a non-flammable and continuous hydrogen fuel stream. Furthermore, ability to use buffered electrolytes allows for the incorporation of earth-abundant catalysts that can only operate at moderate to high pH values.

Graphical abstract: A membrane-less electrolyzer for hydrogen production across the pH scale

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 09 Jan 2015, accepted on 01 Apr 2015 and first published on 01 Apr 2015


Article type: Paper
DOI: 10.1039/C5EE00083A
Citation: Energy Environ. Sci., 2015,8, 2003-2009
  •   Request permissions

    A membrane-less electrolyzer for hydrogen production across the pH scale

    S. M. H. Hashemi, M. A. Modestino and D. Psaltis, Energy Environ. Sci., 2015, 8, 2003
    DOI: 10.1039/C5EE00083A

Search articles by author