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1有机本体异质结电极用于光电化学水氧化显示文摘Artificial photosynthesis provides a sustainable approach toward a carbon–neutral or net-zero economy[1].Photoelectrochemical(PEC)water splitting is one of the artificial photosynthesis techniques that directly convert intermittent sunlight into clean and storable H2 fuel[2].Due to the complex 4e-/4H+process coupled with O–O bond formation step,it is widely acknowledged that the oxidation half-reaction is the efficiency-limiting factor in water splitting[3].Therefore,developing highly efficient and robust water-oxidation photoanodes is crucial for realizing practical solar fuel production.黄辉庭 冯建勇 李朝升 邹志刚 2022Science Bulletin2022,67,3:0
2Sputtered Stainless Steel on Silicon Photoanode for Stable Seawater Splitting in Photoelectrochemical Flow Cell显示文摘Photoelectrochemical(PEC)seawater splitting is a promising method for the direct utilization of solar energy and abundant seawater resources for hydrogen production.Photoelectrodes are susceptible to various ions in seawater and complicated competitive reactions,resulting in the failure of photoelectrodes.This paper proposes the design and fabrication of diff erent sputtered stainless steel(SS)fi lms deposited on silicon photoanodes,completely isolating the electrolytes and semiconductor substrate.Upon coupling with the PEC flow cell,the back-illuminated photoanode coated with 316 SS cocatalyst achieves stable operation for 70 h in natural seawater with a highly alkaline KOH(30 wt.%,7.64 mol/L)electrolyte due to the remarkable protection eff ect of the substrate from stainless steel,while the PEC seawater splitting system achieves a record hydrogen production rate of 600μmol/(h·cm^(2)).An appropriate Ni/Fe ratio in the SS ensures remarkable oxygen evolution activity,while chromic oxide ensures the effective anticorrosion effect by adjusting the microenvironment of the photoanodes.Moreover,fabricating PEC flow cells with photoanodes coated with SS cocatalysts are a viable strategy for PEC seawater splitting.Shixuan Zhao Bin Liu Gong Zhang Qingzhen Wang Yuan Cai Yuting Tong Shujie Wang Peng Zhang Tuo Wang Jinlong Gong 2023Transactions of Tianjin University2023,29,6:0
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