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Exploratory Study of Zn PbO Photoelectrodes for Unassisted Overall Solar Water Splitting. | LitMetric

A complete photoelectrochemical (PEC) water splitting system requires a photocathode and a photoanode to host water oxidation and reduction reactions, respectively. It is thus important to search for efficient photoelectrodes capable of full water splitting. Herein, we report on an exploratory study of a new photoelectrode family of Zn PbO -ZnPbO and ZnPbO-similarly synthesized by a simple and economical method and shown to be a promising photocathode (p-type semiconductor) and photoanode (n-type semiconductor), respectively. From PEC measurements, the bare ZnPbO photocathode achieved a photocurrent density of -0.94 mA/cm at 0 V versus reversible hydrogen electrode (RHE), whereas the pristine ZnPbO photoanode delivered a photocurrent density of 0.51 mA/cm at 1.23 V versus RHE. By depositing suitable cocatalysts onto the photoelectrodes established above, we also demonstrated unassisted overall PEC water splitting, a rare case, if any, wherein a single material system is compositionally engineered for either of the photoelectrodes.

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http://dx.doi.org/10.1021/acsami.8b00421DOI Listing

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