Photoelectrochemical hydrogen generation is a promising approach to address the environmental pollution and energy crisis.In this work,we present a hybridized mechanical and solar energy-driven selfpowered hydrogen pr...Photoelectrochemical hydrogen generation is a promising approach to address the environmental pollution and energy crisis.In this work,we present a hybridized mechanical and solar energy-driven selfpowered hydrogen production system.A rotatory disc-shaped triboelectric nanogenerator was employed to harvest mechanical energy from water and functions as a su cient external power source.WO3/BiVO4 heterojunction photoanode was synthesized in a PEC water-splitting cell to produce H2.After transformation and rectification,the peak current reaches 0.1 m A at the rotation speed of 60 rpm.In this case,the H2 evolution process only occurs with sunlight irradiation.When the rotation speed is over 130 rpm,the peak photocurrent and peak dark current have nearly equal value.Direct electrolysis of water is almost simultaneous with photoelectrocatalysis of water.It is worth noting that the hydrogen production rate increases to 5.45 and 7.27μL min-1 without or with light illumination at 160 rpm.The corresponding energy conversion e ciency is calculated to be 2.43%and 2.59%,respectively.All the results demonstrate such a self-powered system can successfully achieve the PEC hydrogen generation,exhibiting promising possibility of energy conversion.展开更多
基金supported by National Natural Science Foundation of China(NSFC)(Nos.61804103,U1932124)the National Science and Technology Major Project from Minister of Science and Technology of China(Grant No.2018AAA0103104)+8 种基金Natural Science Foundation of the Jiangsu Higher Education Institutions of China(No.18KJA535001)Natural Science Foundation of Jiangsu Province of China(Nos.BK20170343,BK20180242)Jiangsu Key Laboratory for Carbon Based Functional Materials and Devices,Soochow University(KJS1803)the XJTLU Key Programme Special Fund(KSF-A-18)Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments,China University of Mining and Technology(CUMT)supported by Collaborative Innovation Center of Suzhou Nano Science and Technologythe Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)the 111 ProjectJoint International Research Laboratory of Carbon-Based Functional Materials and Devices.
文摘Photoelectrochemical hydrogen generation is a promising approach to address the environmental pollution and energy crisis.In this work,we present a hybridized mechanical and solar energy-driven selfpowered hydrogen production system.A rotatory disc-shaped triboelectric nanogenerator was employed to harvest mechanical energy from water and functions as a su cient external power source.WO3/BiVO4 heterojunction photoanode was synthesized in a PEC water-splitting cell to produce H2.After transformation and rectification,the peak current reaches 0.1 m A at the rotation speed of 60 rpm.In this case,the H2 evolution process only occurs with sunlight irradiation.When the rotation speed is over 130 rpm,the peak photocurrent and peak dark current have nearly equal value.Direct electrolysis of water is almost simultaneous with photoelectrocatalysis of water.It is worth noting that the hydrogen production rate increases to 5.45 and 7.27μL min-1 without or with light illumination at 160 rpm.The corresponding energy conversion e ciency is calculated to be 2.43%and 2.59%,respectively.All the results demonstrate such a self-powered system can successfully achieve the PEC hydrogen generation,exhibiting promising possibility of energy conversion.
