Ultrasmall MoO<sub>x</sub> Clusters as a Novel Cocatalyst for Photocatalytic Hydrogen Evolution.
basic_science · Level V
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- Record sourced from PubMed, PMID 30556181.
- Also identified by DOI 10.1002/adma.201804883.
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Abstract
To enhance the performance of semiconductor photocatalysts, cocatalysts are used to accelerate surface reactions. Herein, ultrasmall molybdenum-oxygen (MoO<sub>x</sub> ) clusters are developed as a novel non-noble cocatalyst, which significantly promotes the photocatalytic hydrogen generation rate of CdS nanowires (NWs). As indicated by extended X-ray absorption fine structure analysis, direct bonds are formed between CdS NWs and MoO<sub>x</sub> clusters, which guarantee the migration of photo-generated charge carriers. Moreover, the MoO<sub>x</sub> clusters induce deep electron trap states owing to the unique atomic arrangement and configuration with the generation of long-lived electrons to enhance the activity. These findings may guide the design of efficient cocatalytic materials for solar water splitting and open a new avenue toward practical applications of ultrasmall clusters.