Metal‐Ion (Fe, V, Co, and Ni)‐Doped MnO2 Ultrathin Nanosheets Supported on Carbon Fiber Paper for the Oxygen Evolution Reaction

Advanced Functional Materials - Tập 27 Số 44 - 2017
Zhiguo Ye1, Li Tao1, Guang Ma2, Yinghu Dong1, Xianliang Zhou1
1School of Material Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China
2Global Energy Interconnection Research Institute of State Grid, Beijing 102211, China

Tóm tắt

AbstractManganese 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.

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Advanced Functional Materials

Tập 27 Số 44

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