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Ruthenium Oxide Nanosheets for Enhanced Oxygen Evolution Catalysis in Acidic Medium
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2019-02-21 , DOI: 10.1002/aenm.201803795 Sourav Laha 1 , Yonghyuk Lee 2 , Filip Podjaski 1, 3 , Daniel Weber 1, 4 , Viola Duppel 1 , Leslie M. Schoop 1 , Florian Pielnhofer 1 , Christoph Scheurer 2 , Kathrin Müller 1 , Ulrich Starke 1 , Karsten Reuter 2 , Bettina V. Lotsch 1, 4, 5
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2019-02-21 , DOI: 10.1002/aenm.201803795 Sourav Laha 1 , Yonghyuk Lee 2 , Filip Podjaski 1, 3 , Daniel Weber 1, 4 , Viola Duppel 1 , Leslie M. Schoop 1 , Florian Pielnhofer 1 , Christoph Scheurer 2 , Kathrin Müller 1 , Ulrich Starke 1 , Karsten Reuter 2 , Bettina V. Lotsch 1, 4, 5
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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 ≈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.
中文翻译：
氧化钌纳米片增强酸性介质中的析氧催化
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方氧化钌纳米片的制备。迄今为止，钌酸盐纳米片在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，达到10 mA cm -2在仅约255 mV的超电势下。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，钌酸盐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。
更新日期：2019-02-21
中文翻译：
氧化钌纳米片增强酸性介质中的析氧催化
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方氧化钌纳米片的制备。迄今为止，钌酸盐纳米片在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，达到10 mA cm -2在仅约255 mV的超电势下。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，钌酸盐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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