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Ruthenium Oxide Nanosheets for Enhanced Oxygen Evolution Catalysis in Acidic Medium

机译：氧化钌纳米片增强酸性介质中的析氧催化

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摘要

The fabrication of highly active and robust hexagonal ruthenium oxide nanosheets for the electrocatalytic oxygen evolution reaction (OER) in an acidic environment is reported. The ruthenate nanosheets exhibit the best OER activity of all solution-processed acid medium electrocatalysts reported to date, reaching 10 mA cm(-2) at an overpotential of only approximate to 255 mV. The nanosheets also demonstrate robustness under harsh oxidizing conditions. Theoretical calculations give insights into the OER mechanism and reveal that the edges are the origin of the high OER activity of the nanosheets. Moreover, the post OER analyses indicate, apart from coarsening, no observable change in the morphology of the nanosheets or oxidation states of ruthenium during the electrocatalytic process. Therefore, the present investigation suggests that ruthenate nanosheets are a promising acid medium OER catalyst with application potential in proton exchange membrane electrolyzers and beyond.
机译：报道了在酸性环境中用于电催化氧放出反应（OER）的高活性和坚固的六角形氧化钌纳米片的制备。钌酸盐纳米片在迄今为止报道的所有溶液处理的酸性介质电催化剂中均表现出最佳的OER活性，在仅约255 mV的超电势下达到10 mA cm（-2）。纳米片还显示出在苛刻的氧化条件下的坚固性。理论计算提供了对OER机制的见解，并揭示了边缘是纳米片的高OER活性的起源。此外，后OER分析表明，除粗化外，在电催化过程中，纳米片的形态或钌的氧化态均未观察到变化。因此，本研究表明，钌酸纳米片是一种有前途的酸性介质OER催化剂，在质子交换膜电解槽及其他领域具有应用潜力。

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  • 来源
    《Advanced energy materials》 |2019年第15期|1803795.1-1803795.8|共8页
  • 作者

    Laha Sourav; Lee Yonghyuk; Podjaski Filip; Weber Daniel; Duppel Viola; Schoop Leslie M.; Pielnhofer Florian; Scheurer Christoph; Mueller Kathrin; Starke Ulrich; Reuter Karsten; Lotsch Bettina V.;

  • 作者单位

    Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany;

    Tech Univ Munich, Chair Theoret Chem, Dept Chem, Lichtenbergstr 4, D-85748 Garching, Germany;

    Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany|Ecole Polytech Fed Lausanne, Stn 12, CH-1015 Lausanne, Switzerland;

    Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany|Ludwig Maximilians Univ Munchen, Butenandtstr 5-13, D-81377 Munich, Germany|Ohio State Univ, Columbus, OH 43210 USA;

    Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany;

    Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany|Princeton Univ, Dept Chem, Princeton, NJ 08540 USA;

    Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany|Univ Regensburg, Inst Inorgan Chem, Univ Str 31, D-93040 Regensburg, Germany;

    Tech Univ Munich, Chair Theoret Chem, Dept Chem, Lichtenbergstr 4, D-85748 Garching, Germany;

    Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany;

    Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany;

    Tech Univ Munich, Chair Theoret Chem, Dept Chem, Lichtenbergstr 4, D-85748 Garching, Germany;

    Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany|Ludwig Maximilians Univ Munchen, Butenandtstr 5-13, D-81377 Munich, Germany|NIM, E Convers & Ctr Nanosci CeNS, Schellingstr 4, D-80799 Munich, Germany;

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  • 正文语种 eng
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  • 关键词

    DFT calculations; electrocatalysis; exfoliation; nanosheets; OER mechanism; oxygen evolution reaction; water splitting;

    机译：DFT计算;电催化;剥离;纳米片;OER机理;析氧反应;水分解;

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