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首页> 外文期刊>Advanced Functional Materials >Unlocking the Potential of Mechanochemical Coupling: Boosting the Oxygen Evolution Reaction by Mating Proton Acceptors with Electron Donors
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Unlocking the Potential of Mechanochemical Coupling: Boosting the Oxygen Evolution Reaction by Mating Proton Acceptors with Electron Donors

机译：解锁机械化学耦合的电位：通过用电子供体配合质子受体来提高氧气进化反应

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摘要

The oxygen evolution reaction (OER) is the bottleneck of many sustainable energy conversion systems, including water splitting technologies. The kinetics of the OER is generally sluggish unless precious metal-based catalysts are used. Perovskite oxides have shown promise as alternatives to these expensive materials. However, for several perovskites, including SrCoO3-delta, the rate-limiting step is proton-transfer. In this study, it is shown that such a kinetic limitation can be overcome by coupling those perovskites with MoS(2)mechanochemically. By studying composites of SrMO3-delta(M = Co, Fe, Ti) and MoS2, the role that the formed heterointerfaces play in enhancing the activity is investigated. Mechanochemically mating SrCoO(3-delta)and MoS(2)increases the mass activity toward OER by a factor of ten and led to a Tafel slope of only 37 mV dec(-1). In contrast, combining MoS(2)with SrFeO(3-delta)or SrTiO3-delta, two materials whose OER is not limited by proton-transfer, does not result in an improvement of the performance. The experimental measurements and first-principle calculations reveal that the MoS(2)at the MoS2@SrCoO(3-delta)heterointerfaces is both an electron and a proton acceptor, thereby facilitating deprotonation of the perovskite and resulting in faster OER kinetics.
机译：氧气进化反应（oer）是许多可持续能量转换系统的瓶颈，包括水分裂技术。除非使用贵金属基催化剂，否则伊尔的动力学通常是缓慢的。钙钛矿氧化物已作为这些昂贵材料的替代品显示出来。然而，对于几种钙钛矿，包括SRCOO3-DELTA，速率限制步骤是质子转移。在该研究中，示出了通过用MOS（2）的MOS（2）偶联来克服这种动力学限制。通过研究SRMO3-DELTA（M = CO，FE，TI）和MOS2的复合材料，研究了形成的异料蔗种在增强活性方面发挥作用的作用。机械化学交配SRCOO（3-三角洲）和MOS（2）将朝向OER的质量活度增加了10倍，并导致仅37 mV DEC（-1）的TAFEL斜率。相比之下，将MOS（2）与SRFEO（3-三角形）或SRTIO3-DERTA组合，其oer不受质子转印限制的两种材料，不会改善性能。实验测量和第一原理计算揭示了MOS2 @ SRCOO（3-Δ）异料蔗渣的MOS（2）是电子和质子受体，从而促进钙钛矿的去质子化并导致更快的oer动力学。

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  • 来源
    《Advanced Functional Materials》 |2021年第4期|2008077.1-2008077.14|共14页
  • 作者

    Curcio Antonino; Wang Jian; Wang Zheng; Zhang Zhiqi; Belotti Alessio; Pepe Simona; Effat Mohammed B.; Shao Zongping; Lim Jongwoo; Ciucci Francesco;

  • 作者单位

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong Peoples R China;

    Seoul Natl Univ Coll Sci Dept Chem Seoul 08826 South Korea;

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong Peoples R China;

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong Peoples R China;

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong Peoples R China;

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong Peoples R China;

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong Peoples R China;

    Nanjing Tech Univ Coll Chem Engn State Key Lab Mat Oriented Chem Engn Nanjing 210009 Peoples R China|Curtin Univ Dept Chem Engn Perth WA 6845 Australia;

    Seoul Natl Univ Coll Sci Dept Chem Seoul 08826 South Korea;

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong Peoples R China|Hong Kong Univ Sci & Technol Dept Chem & Biol Engn Hong Kong Peoples R China|Guangzhou HKUST Fok Ying Tung Res Inst Guangzhou 511458 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    electrocatalysis; hydrogen evolution reaction; oxygen evolution reaction; perovskites; water splitting;

    机译：电殖分析;氢进化反应;氧气进化反应;钙锌矿;水分裂;

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