Due to the high CO2 emissions derived from the current energy system, it is necessary to consider new solutions that go through a cleaner production system, based on renewable energy sources. One of the most interesting options from the sustainability point of view of is the use of light as an energy source to obtain clean fuels, such as hydrogen (artificial photosynthesis). In this technology, the dissociation of the water molecule into hydrogen and oxygen is studied. There are many investigations focused to the water reduction to hydrogen, being a more technologically advanced process, however, the oxidation reaction of water to oxygen continues to be a challenge to overcome.
In this sense, new materials are being studied by IMDEA Energy Institute, such as the one recently published*, which consists of a porous electrode made up of titanium and nickel.
In this work, the capacity of this material to be used as a catalyst for the called oxygen evolution reaction (OER) in an electrochemical cell is investigated. The obtained results reveal a high catalytic activity even when compared with materials that have been used so far for this purpose, placing this material as a very attractive possibility in order to develop this technology.
(*) Guenani, N., Barawi, M., Villar-García, I.J., Bisquert, J., De La Peña O'Shea, V.A., Guerrero, A. Highly porous Ti-Ni anodes for electrochemical oxidations. Sustainable Energy Fuels, 2020,4, 4003-4007. DOI: 10.1039/d0se00242a
More information: Mariam Barawi, Senior Assistant researcher, Photoactivated Processes Unit, email@example.com
Diagram of the oxygen evolution reaction using the Ti-NI electrodes in the electrochemical cell.