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Free-base Porphyrin Polymer for Bifunctional Electrochemical Water Splitting

preprint
submitted on 20.04.2021, 17:05 and posted on 21.04.2021, 09:45 by Yulu Ge, Zhenhua Lyu, Mariana Marcos Hernandez, Dino Villagran
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.


Funding

ONR N00014-19-1-2467

AH-2083-20210327

History

Email Address of Submitting Author

dino@utep.edu

Institution

The University of Texas at El Paso

Country

USA

ORCID For Submitting Author

0000-0002-5798-3584

Declaration of Conflict of Interest

No conflict of interest

Version Notes

First version

Exports