气候变化领域集成服务门户(CCPortal): Solar photoelectrochemical synthesis of electrolyte-free H2O2aqueous solution without needing electrical bias and H2

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DOI	10.1039/d0ee03567j
	Solar photoelectrochemical synthesis of electrolyte-free H2O2aqueous solution without needing electrical bias and H2
	Jeon T.H.; Kim B.; Kim C.; Xia C.; Wang H.; Alvarez P.J.J.; Choi W.
发表日期	2021
ISSN	17545692
起始页码	3110
结束页码	3119
卷号	14 期号:5
英文摘要	The conventional synthesis of hydrogen peroxide (H2O2) such as heterogeneous catalytic and electrochemical processes requires H2 and O2 as reagents, costly noble metals, and organic solvents, which are energy/waste-intensive and hazardous. An alternative method of photoelectrochemical (PEC) synthesis that needs only water and sunlight is environment-friendly but its practical application is limited due to the energy-demanding method for the separation of the synthesized H2O2 from the electrolytes. Herein, we demonstrated the direct synthesis of an electrolyte-free aqueous solution of pure H2O2 by developing a PEC system with solid polymer electrolyte (SPE) and engineered electrodes. Ruthenium catalyst-decorated TiO2 nanorods (RuOx/TNR: photoanode) and anthraquinone-anchored graphite rods (AQ/G: cathode) are placed in an anode compartment and a cathode compartment, respectively, while a middle compartment containing SPE is located between these compartments. Upon solar simulating irradiation (AM 1.5G, 100 mW cm-2), the photoanode generates H+ ions via water oxidation reaction (WOR) and the cathode generates HO2- ions via two-electron oxygen reduction reaction (ORR), while the SPE selectively transports H+ and HO2- into the middle compartment to form pure H2O2 solution. The combined system enabled continuous H2O2 synthesis over 100 h even under bias-free (0.0 V of cell voltage) conditions with the production of ~80 mM H2O2 (electrolyte-free) and a faradaic efficiency of ~90%, which is the highest concentration of pure H2O2 obtained using PEC systems. This study successfully demonstrates the proof-of-concept that might enable the production of a concentrated pure (electrolyte-free) aqueous solution of H2O2 using sunlight, water, and dioxygen only. © 2021 The Royal Society of Chemistry.
英文关键词	Cathodes; Electrolytic reduction; Hydrogen peroxide; Ketones; Nanorods; Oxide minerals; Oxygen reduction reaction; Photoelectrochemical cells; Ruthenium compounds; Solid electrolytes; Titanium dioxide; Conventional synthesis; Electrochemical process; Environment friendly; Faradaic efficiencies; Photoelectrochemicals; Proof of concept; Ruthenium catalysts; Solid polymer electrolytes; Polyelectrolytes; aqueous solution; chemical reaction; concentration (composition); detection method; electrical power; electrochemical method; electrode; electrolyte; hydrogen peroxide; oxidant; oxidation; petrochemical industry; separation; 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/190678
作者单位	Division of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea; Department of Civil and Environmental Engineering, Rice University, Houston, TX 77005, United States; Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX 77005, United States
推荐引用方式 GB/T 7714	Jeon T.H.,Kim B.,Kim C.,et al. Solar photoelectrochemical synthesis of electrolyte-free H2O2aqueous solution without needing electrical bias and H2[J],2021,14(5).
APA	Jeon T.H..,Kim B..,Kim C..,Xia C..,Wang H..,...&Choi W..(2021).Solar photoelectrochemical synthesis of electrolyte-free H2O2aqueous solution without needing electrical bias and H2.Energy & Environmental Science,14(5).
MLA	Jeon T.H.,et al."Solar photoelectrochemical synthesis of electrolyte-free H2O2aqueous solution without needing electrical bias and H2".Energy & Environmental Science 14.5(2021).