Surface Activation and Reconstruction of Non-Oxide-Based Catalysts Through in Situ Electrochemical Tuning for Oxygen Evolution Reactions in Alkaline Media,ACS Catalysis

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Surface Activation and Reconstruction of Non-Oxide-Based Catalysts Through in Situ Electrochemical Tuning for Oxygen Evolution Reactions in Alkaline Media
ACS Catalysis ( IF 11.3 ) Pub Date : 2019-12-12 , DOI: 10.1021/acscatal.9b04216
Arumugam Sivanantham ₁ , Pandian Ganesan ₁ , Ajayan Vinu ₂ , Sangaraju Shanmugam ₁

Affiliation

Most reported catalysts for water oxidation undergo in situ electrochemical tuning to form the active species for their oxygen evolution reaction (OER). In general, the in situ electrochemical transformations of non-oxide catalysts are faster than those of the corresponding oxides, and they typically display improved OER activity. Although many approaches for tuning the active surfaces of catalysts as well as investigations into their roles in the mechanism of adsorption of OER intermediates have been reported, we still have a poor understanding of the dominant active sites formed during the OER. This review highlights current progress into the in situ electrochemical tuning with non-oxide catalysts (especially chalcogenides and pnictides) and offers a comprehensive summary of approaches for the enhancement of OER activity. We describe the non-oxide catalysts that have exhibited promising OER performance with strong in situ electrochemical tuning. We also discuss the preoxidation peak positions of the catalysts in alkaline electrolytes. Furthermore, we explore the probability of new active surface formation on non-oxide catalysts with modified OER mechanisms and the collections of available in situ and ex situ methods to identify the active sites in real- time. Finally, we discuss the challenges affecting the future detection of the active sites of the most promising OER catalysts.

中文翻译：

碱性介质中氧气析出反应的原位电化学调节，基于非氧化物的催化剂的表面活化和重构

大多数报道的用于水氧化的催化剂都经过原位电化学调节，以形成用于其氧释放反应（OER）的活性物质。通常，非氧化物催化剂的原位电化学转变比相应氧化物的原位电化学转变快，并且它们通常显示出改善的OER活性。尽管已经报道了许多调节催化剂活性表面的方法以及对它们在OER中间体吸附机理中的作用的研究，但我们对OER期间形成的主要活性位的理解仍然不多。这篇综述着重介绍了当前使用非氧化物催化剂（特别是硫属元素化物和Pnictides）进行原位电化学调节的进展，并对增强OER活性的方法进行了全面总结。我们描述了具有强大的原位电化学调节性能的OER性能展现出的非氧化物催化剂。我们还讨论了碱性电解质中催化剂的预氧化峰位置。此外，我们探索了在具有改进的OER机制的非氧化物催化剂上形成新的活性表面的可能性，以及可用的现场和非现场方法的集合，以实时识别活性部位。最后，我们讨论了影响未来最有前景的OER催化剂活性位点检测的挑战。我们探索了具有改进的OER机制的非氧化物催化剂上新的活性表面形成的可能性，以及可用的现场和非现场方法的集合来实时识别活性部位。最后，我们讨论了影响未来最有前景的OER催化剂活性位点检测的挑战。我们探索了具有改进的OER机制的非氧化物催化剂上新的活性表面形成的可能性，以及可用的现场和非现场方法的集合来实时识别活性部位。最后，我们讨论了影响未来最有前景的OER催化剂活性位点检测的挑战。

更新日期：2019-12-13

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