Abstract
Rhenium disulfide (ReS2) is an emerging member of the transition metal dichalcogenide (TMD) family. It attracts recent research interest due to its tunable bandgap, weak interlayer coupling, and layer-independent optoelectronic properties. This work demonstrates a gold cluster incorporated ReS2 as a robust hydrogen evolution reaction (HER) catalyst. Au cluster is synthesized via the solid-state grinding method and mixed with ReS2 by mechanical mixing. The excellent catalytic activity of the ReS2-Au cluster is observed both in photoelectrochemical and electrochemical studies. Synergistic interaction between the Au cluster and ReS2 reinforces light absorption of the ReS2-Au cluster, especially within the visible region, and boosts the photoelectrochemical properties of the composite. The photoelectrochemical mechanism of the ReS2-Au cluster is investigated in detail using Mott-Schottky analysis. This work is anticipated to provide new insight into the photoelectrochemical properties of ReS2 and metal-cluster-sensitized TMD nanocomposites.
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