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首页> 外文期刊>Advanced Functional Materials >Metal-Ion (Fe, V, Co, and Ni)-Doped MnO2 Ultrathin Nanosheets Supported on Carbon Fiber Paper for the Oxygen Evolution Reaction
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Metal-Ion (Fe, V, Co, and Ni)-Doped MnO2 Ultrathin Nanosheets Supported on Carbon Fiber Paper for the Oxygen Evolution Reaction

机译：碳纤维纸上负载金属离子（Fe，V，Co和Ni）掺杂的MnO2超薄纳米片用于析氧反应

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摘要

Manganese dioxides (MnO2) are considered one of the most attractive materials as an oxygen evolution reaction (OER) electrode due to its low cost, natural abundance, easy synthesis, and environmental friendliness. Here, metal-ion (Fe, V, Co, and Ni)-doped MnO2 ultrathin nanosheets electrodeposited on carbon fiber paper (CFP) are fabricated using a facile anodic co-electrodeposition method. A high density of nanoclusters is observed on the surface of the carbon fibers consisting of doped MnO2 ultrathin nanosheets with an approximate thickness of 5 nm. It is confirmed that the metal ions (Fe, V, Co, and Ni) are doped into MnO2, improving the conductivity of MnO2. The doped MnO2 ultrathin nanosheet/CFP and the IrO2/CFP composite electrodes for OER achieve a low overpotential of 390 and 245 mV to reach 10 mA cm(-2) in 1 m KOH, respectively. The potential of the doped composite electrode for long-term OER at a constant current density of 20 mA cm(-2) is much lower than that of the pure MnO2 composite electrode.
机译：二氧化锰（MnO2）成本低，天然丰度高，易于合成且对环境友好，因此被认为是最有吸引力的氧释放反应（OER）电极材料之一。在这里，使用方便的阳极共电沉积法制备了电沉积在碳纤维纸（CFP）上的金属离子（Fe，V，Co和Ni）掺杂的MnO2超薄纳米片。在由掺杂的MnO2超薄纳米片组成的碳纤维表面上观察到高密度的纳米簇，其厚度约为5 nm。可以确认，金属离子（Fe，V，Co和Ni）被掺杂到MnO2中，从而提高了MnO2的电导率。掺杂的MnO2超薄纳米片/ CFP和用于OER的IrO2 / CFP复合电极实现了390和245 mV的低过电势，分别在1 m KOH中达到10 mA cm（-2）。在20 mA cm（-2）的恒定电流密度下，用于长期OER的掺杂复合电极的电势远低于纯MnO2复合电极的电势。

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