标题: Molten Electrolyte-Modulated Electrosynthesis of Multi-Anion Mo-Based Lamellar Nanohybrids Derived from Natural Minerals for Boosting Hydrogen Evolution
作者: Jiang, R (Jiang, Rui); Deng, BW (Deng, Bowen); Pi, L (Pi, Liu); Hu, LY (Hu, Liangyou); Chen, D (Chen, Di); Dou, YP (Dou, Yanpeng); Mao, XH (Mao, Xuhui); Wang, DH (Wang, Dihua)
来源出版物: ACS APPLIED MATERIALS & INTERFACES 卷: 12 期: 52 页: 57870-57880 DOI: 10.1021/acsami.0c17137 出版年: DEC 30 2020
摘要: The multi-anion molybdenum-based nanohybrids, N-doped beta-Mo2C/MoP/MoOx (denoted as MoCPO), serving as a highly efficient catalyst for hydrogen evolution reaction (HER), are fabricated via a simple and scalable electrosynthesis in molten NaCl-KCl, which integrates pyrolysis/electroreduction/compounding into a one-pot strategy using polyphosphazenes (PPAs) and earth-abundant molybdenite (mainly MoS2) as precursors. The deliberately selected PPA and molten electrolyte ensure the unique lamellar nanostructures and the blending of multiple anions of C, N, P, and O in the obtained catalyst, specifically, triggering the in situ formation of the structural oxygen vacancies (V-O) in MoCPO. The nature of the hybrids can be regulated by adjusting the synthesis condition. The optimized hybrid displays a low overpotential of 99.2 mV at 10 mA cm(-2) for HER in 0.5 M H2SO4 and stays active over a broad pH range. The theoretical calculations reveal that V-O in the hybrids serves as favorable active sites, thus contributing to the superior HER activity. Moreover, MoCPO is also effective for overall water splitting as a bifunctional catalyst.
PubMed ID: 33320536
作者关键词: molten salt electrolysis; Mo-based nanohybrids; molybdenite; oxygen vacancy; HER
地址: [Jiang, Rui; Deng, Bowen; Pi, Liu; Hu, Liangyou; Chen, Di; Dou, Yanpeng; Mao, Xuhui; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.
通讯作者地址: Wang, DH (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.
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