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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

Title
Surface Activation and Reconstruction of Non-Oxide-Based Catalysts through in Situ Electrochemical Tuning for Oxygen Evolution Reactions in Alkaline Media
Authors
Sivanantham, ArumugamGanesan, PandianVinu, AjayanShanmugam, Sangaraju
DGIST Authors
Sivanantham, Arumugam; Ganesan, Pandian; Vinu, Ajayan; Shanmugam, Sangaraju
Issue Date
2020-01
Citation
ACS Catalysis, 10(1), 463-493
Type
Article
Article Type
Article
Author Keywords
non-oxide catalystsin situ electrochemical tuningsurface activationoxygen evolution reactionalkaline water splitting
Keywords
EFFICIENT BIFUNCTIONAL ELECTROCATALYSTSTRANSITION-METAL PHOSPHIDESHYDROGEN EVOLUTIONHIGHLY EFFICIENTNICKEL FOAMENERGY-CONVERSIONNANOWIRE ARRAYSCOBALT SULFIDETHIN-FILMGRAPHENE OXIDE
ISSN
2155-5435
Abstract
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. © 2019 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/11405
DOI
10.1021/acscatal.9b04216
Publisher
American Chemical Society
Related Researcher
  • Author Shanmugam, Sangaraju Advanced Energy Materials Laboratory
  • Research Interests Electrocatalysts for fuel cells; water splitting; metal-air batteries; Polymer electrolyte membranes for fuel cells; flow batteries; Hydrogen generation and utilization
Files:
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Collection:
Department of Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles


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