KEYWORDS: Water splitting, Alloys, Solar energy, Oxidation, X-ray photoelectron spectroscopy, Scanning transmission electron microscopy, Sustainability, Solar processes, Nitrogen, Nanofilms
We report a light-induced oxyhydroxides-alloy heterostructure reconfigured from a nickel-iron alloy film as a highly catalytic and protective layer on photoanodes for solar water oxidation. The optimized photoanodes exhibit a high applied bias photon-to-current efficiency of 4.24% and long-term stability beyond 250 hours, outperforming the closest competitors by 330% in efficiency and 408% in stability, respectively. This self-generated catalytic-protective oxyhydroxides-alloy layer coating strategy opens the way to implementing large scalable photoelectrochemical devices for solar fuel production with high efficiency and device lifetime.
This work proposed a universal platform for ultra-sensitive detection, which integrates sensory data acquisition and spectral feature extraction into a single machine learning (ML) hardware.We fabricated and tested the sensing platform in glucose detection tasks, reaching 5 orders of magnitude higher sensitivity compared to the state-of-the-art. This technology requires no bulky spectral measuring devices such as a spectrum analyzer but a standard off-the-shelf camera to achieve real-time detection of the glucose concentration.
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