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The researchers used gold as a catalyst. Instead of imagine other applications that gold-coated using conducting polymers, metal-organic frameworks, or other complex materials to deposit the gold on the surface of the electrode, the researchers used curcumin because of its structural uniqueness. Curcumin is used to decorate the gold nanoparticles to stabilize them, forming a porous network around the nanoparticles. Researchers deposited the curcumin gold nanoparticle on the surface of the electrode at a 100 times lower electric current than in previous studies. Without the curcumin coating, the gold nanoparticles agglomerate, cutting down on the surface area exposed to the chemical reaction, Ventrapragada said. "Without this curcumin coating, the performance is poor," Rao said. "We need this coating to stabilize and create a porous environment around the nanoparticles, and then they do a super job with alcohol oxidation. "There's a big push in the industry for alcohol oxidation. This discovery is an excellent enabler for that. The next step is to scale the process up and work with an industrial collaborator who can actually make the fuel cells and build stacks of fuel cells for the real application," he continued. But the research could have broader implications than improved fuel cells. The electrode's unique properties could lend itself to future applications in sensors, supercapacitors and more, Ventrapragada said. In collaboration with the SSSIHL research team, Rao's team is testing the electrode as a sensor that could help identify changes in the level of dopamine. Dopamine has been implicated in disorders such as Parkinson's disease and attention deficit hyperactivity disorder. When members of the research team tested urine samples obtained from healthy volunteers, they could measure dopamine to the approved clinical range with this electrode using a cost-effective method compared to standard ones used today, Rao said. "In the beginning stages of the project, we did not curcumin could support. However, before the end of the alcohol oxidation experiments, we were fairly confident that other applications are possible," Ventrapragada said. "Although we don't have a complete understanding of what's happening at the atomic level, we know for sure that curcumin is stabilizing the gold nanoparticles in a way that it can lend itself to other applications." The journal Nano Energy published the findings in a paper titled, "Green synthesis of a novel porous gold-curcumin nanocomposite for super-efficient alcohol oxidation." More information: Sai Prasad Nayak et al, Green synthesis of a novel porous gold-curcumin nanocomposite for super-efficient alcohol oxidation, Nano Energy (2022). DOI: 10.1016/j.nanoen.2022.106966 Provided by Clemson University 2/ 3PDF Image | Curcumin more efficient fuel cells
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