气候变化领域集成服务门户(CCPortal): A g-C3N4 based photoelectrochemical cell using O2/H2O redox couples

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DOI	10.1039/c7ee03459h
	A g-C3N4 based photoelectrochemical cell using O2/H2O redox couples
	Liu N.; Han M.; Sun Y.; Zhu C.; Zhou Y.; Zhang Y.; Huang H.; Kremnican V.; Liu Y.; Lifshitz Y.; Kang Z.
发表日期	2018
ISSN	17545692
起始页码	1841
结束页码	1847
卷号	11 期号:7
英文摘要	Utilization of solar energy for electric power production provides a practical approach for partially solving the energy crisis and at the same time reducing environmental pollution. Here, we demonstrate a photoelectrochemical cell based on a g-C3N4 photocatalyst using O2/H2O redox couples, fabricated with iron(iii) phthalocyaninate [FeIII(Pc)Cl] mixed with g-C3N4 sprayed on carbon paper as the cathode and a nickel mesh (Ni mesh) coated with g-C3N4 as the anode. Under irradiation, g-C3N4 in the anode harvests photons and produces excited electrons and holes. The produced electrons transfer to the cathode by an external circuit and reduce O2 near the cathode to H2O2, electrochemically catalyzed by g-C3N4 through two-electron, two-proton processes, while the produced H2O2 is further reduced by [FeIII(Pc)Cl] to H2O. The generated holes in the anode oxidize H2O to H2O2 by two-electron, two-proton processes. The formed H2O2 can further be oxidized by the Ni mesh with O2 generation. This photoelectrochemical cell achieves an open-circuit voltage of 0.91 V under AM 1.5G solar light (1 sun, 100 mW cm-2) in 0.1 M HCl under air atmosphere. The total solar to electric power efficiency of this cell is 0.146%. Additionally this cell can generate and store H2O2 (chemical energy) with the electrodes disconnected under light, where water oxidation photocatalyzed by g-C3N4 will occur on both the electrodes. By connecting the electrodes, the cell can be operated as a fuel cell using H2O2 as the fuel in the absence of sunlight with an area-specific capacity of 350 mC cm-2 and a mass-specific capacity of 237 C g-1. © 2018 The Royal Society of Chemistry.
英文关键词	Anodes; Cathodes; Chlorine compounds; Electric power systems; Electric utilities; Electrochemical cells; Electrochemistry; Electrons; Energy policy; Fuel cells; Light; Mesh generation; Open circuit voltage; Oxidation; Photoelectrochemical cells; Solar energy; Chemical energy; Electric power efficiency; Electric power production; Environmental pollutions; Excited electrons; External circuits; Specific capacities; Water oxidation; Iron compounds; catalyst; electrical power; electrochemical method; electron; energy efficiency; fuel cell; iron; irradiation; photochemistry; redox conditions; solar power
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190206
作者单位	Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, China; Department of Materials Science and Engineering, Technion, Israel Institute of Technology, Haifa, 3200003, Israel
推荐引用方式 GB/T 7714	Liu N.,Han M.,Sun Y.,et al. A g-C3N4 based photoelectrochemical cell using O2/H2O redox couples[J],2018,11(7).
APA	Liu N..,Han M..,Sun Y..,Zhu C..,Zhou Y..,...&Kang Z..(2018).A g-C3N4 based photoelectrochemical cell using O2/H2O redox couples.Energy & Environmental Science,11(7).
MLA	Liu N.,et al."A g-C3N4 based photoelectrochemical cell using O2/H2O redox couples".Energy & Environmental Science 11.7(2018).