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Construction of CoB/Mn0.5Cd0.5S photocatalyst with Schottky junction: Effective charge separation and highly efficient H2 evolution performance
Ist Teil von
International journal of hydrogen energy, 2024-01, Vol.51, p.531-539
Ort / Verlag
Elsevier Ltd
Erscheinungsjahr
2024
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
In this paper, Mn0.5Cd0.5S (MCS) was prepared by hydrothermal method and CoB was introduced as a co-catalyst for the synthesis of CoB/Mn0.5Cd0.5S (CBMCS). After the characterization of UV–vis DRS, PL, photocurrent, EIS, LSV and Mott-Schottky, it is proved that the introduction of CoB plays a prominent role in inhibiting the photogenerated charge recombination and boosting the responsiveness to visible light. The photocatalytic hydrogen precipitation experiments revealed that the hydrogen evolution rate of CBMCS composite was up to 3810.0 μmol h−1 g−1, which was 7.0 times higher than MCS with a hydrogen precipitation rate of 543.3 μmol h−1 g−1, and 2.2 times higher than 1%Pt/MCS with a hydrogen evolution rate of 1729.1 μmol h−1 g−1 and kept excellent stability. Then by theoretical calculation and UPS, the work function was obtained to prove the formation of the Schottky junction between MCS and CoB. Obviously, this study provides a low-cost and effective co-catalyst to replace the precious metal Pt, offering a doable scheme to boost the photocatalytic activity of Mn0.5Cd0.5S.
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•CoB/Mn0.5Cd0.5S (CBMCS) photocatalyst with schottky junction was successfully prepared.•CBMCS photocatalyst exhibits excellent performance for splitting water to H2.•An inexpensive and effective cocatalyst replaced Pt was shown.•The possible mechanism of CBMCS photocatalytic materials is proposed.