Journal of Catalysis
Journal of Catalysis
5 years ago

Facile room-temperature surface modification of unprecedented FeB co-catalysts on Fe2O3 nanorod photoanodes for high photoelectrochemical performance

Facile room-temperature surface modification of unprecedented FeB co-catalysts on Fe2O3 nanorod photoanodes for high photoelectrochemical performance
An unprecedented FeB-based co-catalyst for Fe2O3 nanorod photoanodes is explored for the first time by a simple room-temperature dipping method. The FeB overlayer formed in situ, which inherently possesses good interfacial contact, can remarkably suppress charge carrier recombination in Fe2O3 photoanodes and dramatically decrease electrode/electrolyte interface resistance. These beneficial features promote a twofold increment in photocurrent density and significantly reduce the onset potential of Fe2O3 photoanodes. Furthermore, their photoelectrochemical (PEC) performance can be further improved by co-loading of Co–Pi. The photocurrent density of 1.9mA/cm2 at 1.23V vs. RHE and the particularly low onset potential of 0.61V, which is dominantly smaller than those reported so far, can be realized controllably. Hence, our work suggests a new and promising co-catalyst for Fe2O3 photoanode. It also offers a facile strategy for fabricating low-cost and efficient PEC solar energy conversion devices.

Publisher URL: www.sciencedirect.com/science

DOI: S0021951717301501

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