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首页> 外文期刊>RSC Advances >Carbon quantum dot sensitized Pt@Bi2WO6/FTO electrodes for enhanced photoelectro-catalytic activity of methanol oxidation
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Carbon quantum dot sensitized Pt@Bi2WO6/FTO electrodes for enhanced photoelectro-catalytic activity of methanol oxidation

机译：碳量子点敏化Pt @ Bi 2 WO 6 / FTO电极增强甲醇氧化的光电催化活性

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Carbon quantum dot sensitized Pt@Bi2WO6/FTO electrodes (simplified as CQDs-Pt@Bi2WO6/FTO) were successfully prepared by loading platinum particles onto Bi2WO6 nanoplates via a photo-deposition method and sensitized carbon quantum dots (CQDs) via a dip-coating method. The photoelectro-catalytic properties of the Pt@Bi2WO6/FTO and CQDs-Pt@Bi2WO6/FTO electrodes for methanol oxidation were investigated. The results indicated that the CQDs-Pt@Bi2WO6/FTO electrode shows higher photoelectro-catalytic activity and better stability than that of the Pt@Bi2WO6/FTO electrode. The higher photoelectro-catalytic performance for methanol oxidation was attributed due to the special synergetic effects between the photocatalytic and electrocatalytic process under solar light irradiation. More importantly, the introduction of CQDs broaden the photoresponse range of the Bi2WO6 material and improves the mobility of the photocarriers. Meanwhile, the doped CQDs act as preferential adsorption sites for the intermediate carbonaceous species during methanol oxidation. This not only alleviates CO poisoning towards the Pt particles, but also improves the efficiency of methanol oxidation by constructing a new type of CQDs-Pt electrocatalyst. The composite material, which combines the dual function of photocatalysis and electrocatalysis will be a promising candidate for new photoelectro-catalytic fuel cells.
机译：碳量子点敏化的Pt @ Bi 2 WO 6 / FTO电极（简化为CQDs-Pt @ Bi <通过将铂粒子装载到Bi 2 <上成功地制备了small> 2 WO 6 / FTO） / sub> WO 6 纳米板通过光沉积方法和敏化碳量子点（CQD）通过 / em>浸涂法。 Pt @ Bi 2 WO 6 / FTO和CQDs-Pt @ Bi <的光电催化性能研究了用于甲醇氧化的small> 2 WO 6 / FTO电极。结果表明，CQDs-Pt @ Bi 2 WO 6 / FTO电极具有较高的光电催化活性。且稳定性优于Pt @ Bi 2 WO 6 / FTO电极。甲醇氧化的较高光电催化性能归因于太阳光照射下光催化与电催化过程之间的特殊协同作用。更重要的是，引入CQD扩展了Bi 2 WO 6 材料的光响应范围并提高了迁移率的光电载体。同时，在甲醇氧化过程中，掺杂的CQDs作为中间碳质物种的优先吸附位。通过构建新型的CQDs-Pt电催化剂，不仅减轻了CO对Pt颗粒的中毒现象，而且提高了甲醇的氧化效率。结合了光催化和电催化双重功能的复合材料将成为新型光电催化燃料电池的有希望的候选者。

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