Efficient Solar-to-Hydrogen Conversion Efficiency at pH 7 Based on a PV-EC Cell with an Oligomeric Molecular Anode.

Yuanyuan Shi, Tsung-Yu Hsieh, Md Asmaul Hoque, Werther Cambarau, Stéphanie Narbey, Carolina Gimbert-Suriñach, Emilio Palomares, Mario Lanza, Antoni Llobet

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In the urgent quest for green energy vectors, the generation of hydrogen by water splitting with sunlight occupies a preeminent standpoint. The highest solar-to-hydrogen (STH) efficiencies have been achieved with photovoltaic-electrochemical (PV-EC) systems. However, most PV-EC water-splitting devices are required to work at extreme conditions, such as in concentrated solutions of HClO$_{4}$ or KOH or under highly concentrated solar illumination. In this work, a molecular catalyst-based anode is incorporated for the first time in a PV-EC configuration, achieving an impressive 21.2% STH efficiency at neutral pH. Moreover, as opposed to metal oxide-based anodes, the molecular catalyst-based anode allows us to work with extremely small catalyst loadings (
Original languageEnglish (US)
JournalACS Applied Materials & Interfaces
StatePublished - Dec 1 2020

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