气候变化领域集成服务门户(CCPortal): Graphene-nanoplatelets-supported NiFe-MOF: High-efficiency and ultra-stable oxygen electrodes for sustained alkaline anion exchange membrane water electrolysis

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DOI	10.1039/d0ee00877j
	Graphene-nanoplatelets-supported NiFe-MOF: High-efficiency and ultra-stable oxygen electrodes for sustained alkaline anion exchange membrane water electrolysis
	Thangavel P.; Ha M.; Kumaraguru S.; Meena A.; Singh A.N.; Harzandi A.M.; Kim K.S.
发表日期	2020
ISSN	17545692
起始页码	3447
结束页码	3458
卷号	13 期号:10
英文摘要	Practical hydrogen production using high-efficiency, low-cost, and stable oxygen electrodes is crucial for a sustainable clean energy future. Herein we report a graphene-nanoplatelets-supported (Ni,Fe) metal-organic framework (MOF) as a superior and ultra-durable (>1000 h) anode for alkaline water electrolysis. The MOF on carbon-fiber paper electrodes requires an overpotential ? = 220 mV to achieve a current density j = 10 mA cm-2 (? = 180 mV on nickel foam for j = 20 mA cm-2) with a Tafel slope of 51 mV per decade, high turnover frequency (1.22 s-1), high faradaic efficiency (99.1%), and long-term durability of >1000 h in continuous electrolysis. In an alkaline anion exchange membrane water electrolyzer (AAEMWE), it exhibits a record current density of 540 mA cm-2 at 1.85 V at 70 °C, outperforming the state-of-the-art Pt/C//IrO2. A breakthrough strategy introduced in membrane electrode assembly fabrication by extending the electrical contact with an aqueous electrolyte offers an additional OH- transport pathway to regenerate the original conductivity of the AAEMWE in continuous electrolysis, without any significant change in the pH of the electrolyte. These findings open up durable, high-performance AAEMWE and direct solar-to-fuel conversion, especially to replace high-cost proton exchange membrane water electrolysis that already works with ultra-pure water. © The Royal Society of Chemistry.
英文关键词	Alkalinity; Electrodes; Electrolysis; Electrolytes; Graphene; Graphene Nanoplatelets; Graphite fibers; Ion exchange membranes; Metal-Organic Frameworks; Organometallics; Oxygen; Alkaline anion exchange membrane; Alkaline water electrolysis; Electrical contacts; Faradaic efficiencies; Long term durability; Membrane electrode assemblies; Proton exchange membranes; Sustainable clean energy; Hydrogen production
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/189540
作者单位	Center for Superfunctional Materials, Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea; Department of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, 44919, South Korea; CSIR-Central Electrochemical Research Institute, Karaikudi, 630003, India
推荐引用方式 GB/T 7714	Thangavel P.,Ha M.,Kumaraguru S.,et al. Graphene-nanoplatelets-supported NiFe-MOF: High-efficiency and ultra-stable oxygen electrodes for sustained alkaline anion exchange membrane water electrolysis[J],2020,13(10).
APA	Thangavel P..,Ha M..,Kumaraguru S..,Meena A..,Singh A.N..,...&Kim K.S..(2020).Graphene-nanoplatelets-supported NiFe-MOF: High-efficiency and ultra-stable oxygen electrodes for sustained alkaline anion exchange membrane water electrolysis.Energy & Environmental Science,13(10).
MLA	Thangavel P.,et al."Graphene-nanoplatelets-supported NiFe-MOF: High-efficiency and ultra-stable oxygen electrodes for sustained alkaline anion exchange membrane water electrolysis".Energy & Environmental Science 13.10(2020).