Bifunctional Electrocatalysts for Overall Water Splitting from an Iron/Nickel-Based Bimetallic Metal-Organic Framework/Dicyandiamide Composite.
Bifunctional Electrocatalysts for Overall Water Splitting from an Iron/Nickel-Based Bimetallic Metal-Organic Framework/Dicyandiamide Composite.
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DOI：
10.1002/anie.201803136
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发表时间：
2018-06
影响因子：
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通讯作者：
Xiaojia Zhao;Pradip Pachfule;Shuang Li;J. Simke;Johannes Schmidt;Arne Thomas
中科院分区：
文献类型：
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作者：
Xiaojia Zhao;Pradip Pachfule;Shuang Li;J. Simke;Johannes Schmidt;Arne Thomas
双金属金属有机骨架 (MIL-88-Fe/Ni)-双氰胺复合材料的热解产生含 Fe 和 Ni 的碳质材料，这是一种用于整体水分解的高效双功能电催化剂。 FeNi3 和 NiFe2 O4 是紧密嵌入氮掺杂碳-碳纳米管基质中的金属和金属氧化物化合物。这种混合催化剂（Fe-Ni@NC-CNTs）显着提高了电荷转移效率并抑制了金属催化剂的腐蚀，在碱性溶液中10 mA cm-2下具有高OER和HER活性，过电势分别为274和202 mV。当这种双功能催化剂进一步用于电化学水分解装置中生产H2和O2时，它可以在环境条件下运行，氢气和氧气的产气率分别为1.15和0.57 μL s-1，显示出其实际应用的潜力。
Pyrolysis of a bimetallic metal-organic framework (MIL-88-Fe/Ni)-dicyandiamide composite yield a Fe and Ni containing carbonaceous material, which is an efficient bifunctional electrocatalyst for overall water splitting. FeNi3 and NiFe2 O4 are found as metallic and metal oxide compounds closely embedded in an N-doped carbon-carbon nanotube matrix. This hybrid catalyst (Fe-Ni@NC-CNTs) significantly promotes the charge transfer efficiency and restrains the corrosion of the metallic catalysts, which is shown in a high OER and HER activity with an overpotential of 274 and 202 mV, respectively at 10 mA cm-2 in alkaline solution. When this bifunctional catalyst was further used for H2 and O2 production in an electrochemical water-splitting unit, it can operate in ambient conditions with a competitive gas production rate of 1.15 and 0.57 μL s-1 for hydrogen and oxygen, respectively, showing its potential for practical applications.