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Development of a bi-compound heterogeneous cocatalyst modified p-Si photocathode for boosting the photoelectrochemical water splitting performance
Ist Teil von
Journal of materials chemistry. A, Materials for energy and sustainability, 2021-04, Vol.9 (14), p.9157-9164
Ort / Verlag
Cambridge: Royal Society of Chemistry
Erscheinungsjahr
2021
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
In this paper, a MoS
2
/Rh-P bi-compound heterogeneous cocatalyst is developed to improve the photoelectrochemical (PEC) water splitting performance of a p-Si photocathode. Compared with the single cocatalysts (MoS
2
and Rh-P), the bi-compound heterogeneous cocatalyst MoS
2
/Rh-P on the p-Si photocathode surface exhibits a much better hydrogen evolution reaction (HER) activity at the electrode/electrolyte interface, which is attributed to the synergistic electronic effect between MoS
2
and Rh-P materials. Meanwhile, the TiO
2
layer could serve as a linker between p-Si and the surface cocatalyst to optimize the interface energy, further promoting the photocarrier transfer process within the system. Thus, the as-prepared p-Si-TiO
2
-MoS
2
/Rh-P photocathode exhibits excellent PEC performance with a high photocurrent density of −24.1 mA cm
−2
at 0 V (
vs.
RHE) and a positive onset potential of 0.43 V (
vs.
RHE). And the bi-compound heterogeneous cocatalyst provides a feasible strategy for boosting the PEC hydrogen evolution.
Development of a novel bi-compound cocatalyst (MoS
2
/Rh-P) modified p-Si photocathode for boosting the photoelectrochemical water reduction performance.