文献详情
Low overpotential water oxidation at neutral pH catalyzed by a copper(ii) porphyrin
文献类型：期刊
期刊名称：Chemical science影响因子和分区
年：2019
卷：10
期：9
页码：2613-2622
ISSN：2041-6520
所属部门：化学系
摘要：Low overpotential water oxidation under mild conditions is required for new energy conversion technologies with potential application prospects. Extensive studies on molecular catalysis have been performed to gain fundamental knowledge for the rational designing of cheap, efficient and robust catalysts. We herein report a water-soluble CuII complex of tetrakis(4-N-methylpyridyl)porphyrin (1), which catalyzes the oxygen evolution reaction (OER) in neutral aqueous solutions with small overpotentia ...More
Low overpotential water oxidation under mild conditions is required for new energy conversion technologies with potential application prospects. Extensive studies on molecular catalysis have been performed to gain fundamental knowledge for the rational designing of cheap, efficient and robust catalysts. We herein report a water-soluble CuII complex of tetrakis(4-N-methylpyridyl)porphyrin (1), which catalyzes the oxygen evolution reaction (OER) in neutral aqueous solutions with small overpotentials: the onset potential of the catalytic water oxidation wave measured at current density j = 0.10 mA cm-2 is 1.13 V versus a normal hydrogen electrode (NHE), which corresponds to an onset overpotential of 310 mV. Constant potential electrolysis of 1 at neutral pH and at 1.30 V versus NHE displayed a substantial and stable current for O2 evolution with a faradaic efficiency of >93%. More importantly, in addition to the 4e water oxidation to O2 at neutral pH, 1 can catalyze the 2e water oxidation to H2O2 in acidic solutions. The produced H2O2 is detected by rotating ring-disk electrode measurements and by the sodium iodide method after bulk electrolysis at pH 3.0. This work presents an efficient and robust Cu-based catalyst for water oxidation in both neutral and acidic solutions. The observation of H2O2 during water oxidation catalysis is rare and will provide new insights into the water oxidation mechanism. ...Hide

DOI：10.1039/c8sc04529a
百度学术：Low overpotential water oxidation at neutral pH catalyzed by a copper(ii) porphyrin
语言：外文
人气指数：3
浏览次数：3
作者其他论文



Atmospheric Mercury Outflow from China and Interprovincial Trade.Chen Long, Liang Sai, Zhang Yanxu, et al. .Environmental science & technology. 2018.
Convenient Immobilization of Cobalt Corroles on Carbon Nanotubes through Covalent Bonds for Electrocatalytic Hydrogen and Oxygen Evolution Reactions.Li Hua, Li Xialiang, Lei Haitao, et al. .ChemSusChem. 2018.
Impurity problem of alkaline-earth-like atoms near an orbital Feshbach resonance.Shi Yue-Ran, Lu Zhuo-Cheng, Wang Jing-Kun, et al. .ACTA PHYSICA SINICA. 2019, 68(4).
Characteristics of Speciated Mercury Emissions from Coal Combustion in Air and Oxygen-Enriched Environment.Sun Yingli, Lv Guangkuo, Zhang Hefeng, et al. .Bulletin of environmental contamination and toxicology. 2019, 102(5), 695-700.
Trans-provincial health impacts of atmospheric mercury emissions in China.Chen Long, Liang Sai, Liu Maodian, et al. .Nature communications. 2019, 10(1), 1484.