尿素氧化反应中 PdAu/ITO 电催化剂的合成与性能

IF 1.3 4区化学 Q4 ELECTROCHEMISTRY

International Journal of Electrochemical Science Pub Date : 2024-10-01 DOI:10.1016/j.ijoes.2024.100810

Isabely M.G. Abreu, Victória A. Maia, Rodrigo F.B. de Souza, Almir O. Neto

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引用次数: 0

摘要

通过硼氢化钠工艺制备了不同原子组成的钯金电催化剂，并将其支撑在 ITO 上。XRD 结果显示出与 ITO 有关的强烈结晶峰，这可能掩盖了结晶度较低的钯或金相的出现。透射结果表明，钯和金纳米颗粒在支撑物上聚集，这种现象与金属氧化物支撑物相符。在没有尿素的情况下，循环伏安图显示出钯金电极常见的特征，与纯钯或金相比，含氧物种有所增加。有尿素存在时的伏安图显示了氧化过程和较低的电流值，表明催化剂失活过程。与其他制备的电催化剂相比，钯金 75:25 显示出更高的功率密度值，表明钯和金在尿素氧化反应中具有协同作用。

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Synthesis and performance of PdAu/ITO electrocatalysts in urea oxidation reaction

PdAu electrocatalysts were prepared in different atomic compositions supported on ITO by sodium Borohydride process. XRD results show intense crystalline peaks related to ITO, which may mask the appearance of less crystalline Pd or Au phases. Transmission results indicate agglomeration of palladium and gold nanoparticles on the support, a phenomenon compatible with metal oxide supports. Cyclic voltammograms in the absence of urea display characteristics commonly observed for PdAu electrodes, with an increase in oxygenated species compared to pure Pd or Au. Voltammograms in the presence of urea showed oxidation processes and lower current values, indicating catalyst deactivation processes. PdAu 75:25 demonstrated higher power density values compared to other prepared electrocatalysts, suggesting a synergy between Pd and Au for urea oxidation reaction.

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来源期刊

International Journal of Electrochemical Science 工程技术-电化学

CiteScore

3.00

自引率

20.00%

发文量

714

审稿时长

2.6 months

期刊介绍： International Journal of Electrochemical Science is a peer-reviewed, open access journal that publishes original research articles, short communications as well as review articles in all areas of electrochemistry: Scope - Theoretical and Computational Electrochemistry - Processes on Electrodes - Electroanalytical Chemistry and Sensor Science - Corrosion - Electrochemical Energy Conversion and Storage - Electrochemical Engineering - Coatings - Electrochemical Synthesis - Bioelectrochemistry - Molecular Electrochemistry