Abstract
A novel composite photocatalyst was synthesized by loading 5 wt % of platinum cobalt alloy on 3C-SiC nanowires and powder (Pt-Co-SiC) respectively via a simple polyol reduction method. Pt-Co-SiC were comprehensively characterized by SEM, HRTEM, XRD, PL, and XPS. The results indicated that Pt-Co nanoparticles in the size of 2–5 nm were dispersed homogeneously in the SiC nanowires and powders. The photocurrent response of the Pt-Co-SiC increased remarkably with increasing Pt content and the best performance was observed with the sample of Pt3Co-SiC. Especially, the Pt3Co-SiC nanowires photoelectrode exhibited improved cathodic current density (0.14 mA·cm−2) under the simulated sunlight, which was about 10 times higher than the Pt3Co-SiC powders. The H2 production rate for the Pt3Co-SiC nanowires is 30 times more than that of the pure SiC nanowires. The enhancement of the Pt-Co-SiC properties could be ascribed to the fact that more visible light was harvested and the photogenerated electron and the interfacial electron transfered more easily.
Highlights
Photocatalytic and photoelectrochemical hydrogen evolution from water using semiconductor-based materials has attracted considerable attention since Fujishima’s discovery of photoelectrocatalytic H2 evolution over TiO2 in 1972 [1,2,3,4,5,6,7]
The photoelectrocatalytic activity was measured on the ethylene glycol reduction method are the synthesis of nanoparticles with good dispersion and uniform electrochemical workstation under visible light irradiation
Stability tests for photocatalytic hydrogen production using the Pt3Co-SiC
Summary
Photocatalytic and photoelectrochemical hydrogen evolution from water using semiconductor-based materials has attracted considerable attention since Fujishima’s discovery of photoelectrocatalytic H2 evolution over TiO2 in 1972 [1,2,3,4,5,6,7]. Compared with pure Pt, Pt-based alloys imply an opportunity to reduce material costs and maintain higher photocatalytic activity [24]. Pt-based alloys imply an opportunity to reduce material costs and maintain higher especially popular because of its small size, excellent self-stability, and high catalytic activity [25,26,27]. Based on the above mentioned facts, the adoption of Nanowires to modify SiC is expected, with popular because of its small size, excellent self-stability, and high catalytic activity [25,26,27]. The photoelectrocatalytic activity was measured on the ethylene glycol reduction method are the synthesis of nanoparticles with good dispersion and uniform electrochemical workstation under visible light irradiation. Possible catalytic mechanisms for the improved photocatalytic performance are proposed
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