AI Article Synopsis
- * It was found that Ru nanoparticles help in the adsorption of water molecules, while Ru single atoms and clusters improve the release of hydrogen, indicating a specific role for each form in the catalytic process.
- * Experimental results showed that a combination of 1.07 wt% Ru nanoparticles and clusters on CN achieved a maximum hydrogen evolution rate of 13.64 mmol h g, significantly outperforming samples with just CN or lower amounts of Ru, highlighting the importance of cocatalyst form in optimizing
Article Abstract
Catalysts composed of nanocluster and single-atom (SA) were extensively used to enhance electrocatalytic water splitting performance, whereas study of their photocatalytic hydrogen (H) evolution activity was limited. Herein, carbon nitride (CN) decorated by ruthenium (Ru) cocatalysts existed as SA + cluster, cluster + nanoparticles (NPs), and NPs were prepared by impregnation and calcination processes. The correlation between existential form, content of Ru cocatalyst and H evolution rate were carefully discussed. It was found that Ru NPs were favor for water molecule adsorption, whereas Ru SAs and clusters facilitated H desorption. Theoretical calculations revealed that Ru clusters + NPs cocatalyst were beneficial for H* intermediate formation. Water splitting tests found that 1.07 wt% Ru NPs + cluster modified CN showed the highest H evolution rate of 13.64 mmol h g, which was 266.4 and 1.5 times higher than those of CN and Ru NPs (2.33 wt%) decorated CN, respectively. This work deeply reveals the influences of existential form of Ru cocatalysts on photocatalytic water splitting of CN, and provides thought in designing new cocatalysts to largely enhance H evolution.
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| http://dx.doi.org/10.1016/j.jcis.2024.06.092 | DOI Listing |
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