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AuPt bimetallic loaded defect state g-C 3 N 4 enhances photocatalytic H 2 evolution: Exploring synergistic effects and charge transfer mechanisms

Separation and Purification Technology, ISSN: 1383-5866, Vol: 354, Page: 128884
2025
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Article Description

AuPt alloy nanoparticles (NPs) were prepared using a simple photodeposition method to modify defective state g-C 3 N 4 nanosheets (HCN) which contained N vacancies, B doping, and C N groups. The visible diffuse reflectance spectra (DRS) indicate that AuPt/HCN exhibits high light absorption capability. The photoluminescence spectrum (PL) and steady-state surface photovoltage (SPV) indicate that AuPt/HCN possesses a high rate of photogenerated charge separation and a high efficiency of photogenerated electron transfer. The electrochemical tests indicate that AuPt/HCN exhibits lower electrochemical impedance. AuPt/HCN (1.0 wt%) exhibits outstanding photocatalytic hydrogen evolution efficiency, producing hydrogen at a rate of 2095 μmol·g −1 ·h −1 under visible light, which is 2.10 times and 1.55 times higher than that of monometallic Au/HCN (1.0 wt%) (997 μmol·g −1 ·h −1 ) and Pt/HCN (1.0 wt%) (1349 μmol·g −1 ·h −1 ), respectively. The bimetallic synergistic effect of AuPt alloy NPs co-catalysts enhances the photocatalytic hydrogen evolution activity of AuPt/HCN composite photocatalysts.

Bibliographic Details

Yahao Zhao; Peng Liu; Wen Liu; Hui Lv; Zhuo Peng; Changcun Han; Jiayi Tian; Furong Ye; Zhengwang Cheng; Yizhong Huang

Elsevier BV

Chemistry; Chemical Engineering

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