Constructing a Metallic/Semiconducting TaB2/Ta2O5 Core/Shell Heterostructure for Photocatalytic Hydrogen Evolution

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Abstract

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A conceptual metallic/semiconducting TaB2/Ta2O5 core/shell heterostructure exhibits a substantial improvement in photocatalytic hydrogen evolution rate under both UV and visible light. TaB2 plays a dual role in boosting the photocatalytic activity by extending the light-absorption range via efficient interfacial electronic modification and by promoting the separation and transfer of photoexcited charge carriers by using metallic TaB2 core as an electron collector.

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