الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Using high-performance electrocatalysts is crucial for the electrooxidation of methanol and urea, while there are some potential challenges. A binary nanocomposite originated from anchored photodeposited gold solution (Au) on palladium (Pd) one-step photo deposition technique or hydrothermal preparation of Pd/graphene. In the presence of polyvinyl pyrrolidone (PVP) as a capping agent, Pd deformed shape with polygonal configuration. Throughout the photodeposition of Au on the surface of PdNPs, the surface plasmonic resonance (SPR) was observed near 523 nm, resulting in a significant decrease in the diameter size from 27 to 18.6 nm. The attenuation of photoluminescence intensity also demonstrated that Pd/graphene is more efficient for charge separation, which is favorably reflected in the efficiency of the single fuel cell. After adding Au and graphene, the surface roughness was improved. Besides, electrochemical data showed that Pd/graphene has superior mass-specific behavior equal to 76.96 mCmg-1 under visible-light illumination rather than in the dark state (52 mCmg-1) throughout methanol oxidation. Otherwise, the mass-specific activity of Pd/Au under such a urea condition was 31.86 mCmg-1. To avoid the harsh conditions and depend on the obtained promising data, it can be concluded that such a preparation method is a reliable synthetic route for producing a nanocomposite system for attaining maximum electrochemical oxidation of both methanol and urea. These metal oxide nanotubes have a significant piezoelectric response, which makes them appropriate for nanoelectromechanical applications.