Projected future global energy demands require sustainable energy sources as alternatives to the current world dependence on hydrocarbon fuels. The production of hydrogen and oxygen gas from water is a promising approach. Currently, water-splitting electrolyzers require precious metals as electrocalysts because they are active and stable. Yet, replacement of these precious metals by cost-effective alternatives is necessary for the economic feasibility of this approach. Here, we describe a molecular based polymeric approach that effectively removes the need to use any metal to electrochemically split water. The incorporation of free-base porphyrin units into a 2D network structure yields a stable and efficient bifunctional electrocatalyst for water oxidation and water reduction that can operate for days at competitive overpotentials comparable to metal based ones. <br><br><br>
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