Figure S11 (Supporting Information) summarizes the overpotentials at 0 V versus RHE of PtFeCoNiCu HEA/TiO 2 –NFs synthesized at electrodeposition times of 40, 60, and 120 min under ON and OFF illumination states at 10 s intervals, showing a decreasing trend in light responsiveness, from 0.62 to 0.12 mA cm −2 from t E = 40 to 120 min, respectively.
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Coupling of Engineered High Entropy Alloys with Semiconducting TiO<sub>2</sub> Nanofilms for Scalable and Ultrafast Alkaline Hydrogen Evolution Reaction.
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