What question did this study set out to answer?

Disentangle the distinct catalytic roles and cooperative mechanisms of tetrahedral cobalt(II) and octahedral cobalt(III) active sites during the electrocatalytic oxygen evolution reaction.

December 30, 2022Analytical Chemistry

Interfacial Evolution on Co-based Oxygen Evolution Reaction Electrocatalysts Probed by Using In Situ Surface-Enhanced Raman Spectroscopy

View Full Paper

Ask AI

Bookmark

Authors

YHYanfang Hu CHCejun Hu ADAoxuan Du

Discussion

Member takes

Overview

Spectroscopic study reveals synergistic cobalt active sites during the oxygen evolution reaction, highlighting strategies for designing efficient water-splitting catalysts.

Key Points

Disentangle the distinct catalytic roles and cooperative mechanisms of tetrahedral cobalt(II) and octahedral cobalt(III) active sites during the electrocatalytic oxygen evolution reaction.
Monitored the formation and evolution of surface reaction intermediates on a model CoOx catalyst using in situ surface-enhanced Raman spectroscopy (SERS) paired with ion-substitution experiments.
Verified the proposed catalytic mechanism across synthetic Co2+-Co3+ layered double hydroxides to determine optimal site ratios.
Octahedral Co3+ sites act as catalytic centers for converting OH- into O-O- intermediate species observed at 1140–1180 cm^-1.
Tetrahedral Co2+ sites dynamically evolve during the reaction into CoOOH (503 cm^-1) and CoO2 (560 cm^-1) active centers that mediate the release of O2 from O-O- intermediates.
Layered double hydroxides achieve maximum catalytic performance at an optimal Co2+ to Co3+ ratio of 1:1.2, successfully balancing intermediate generation and oxygen release.

Cite This Study

Hu et al. (2022) studied this question.

synapsesocial.com/papers/69df09d8de200760a86141d2 https://doi.org/10.1021/acs.analchem.2c04931

View Full Paper

Ask AI

Bookmark

December 30, 2022Analytical Chemistry

Interfacial Evolution on Co-based Oxygen Evolution Reaction Electrocatalysts Probed by Using In Situ Surface-Enhanced Raman Spectroscopy

View Full Paper

Ask AI

Bookmark

Authors

YHYanfang Hu CHCejun Hu ADAoxuan Du

Discussion

Member takes

Overview

Spectroscopic study reveals synergistic cobalt active sites during the oxygen evolution reaction, highlighting strategies for designing efficient water-splitting catalysts.

Key Points

Disentangle the distinct catalytic roles and cooperative mechanisms of tetrahedral cobalt(II) and octahedral cobalt(III) active sites during the electrocatalytic oxygen evolution reaction.
Monitored the formation and evolution of surface reaction intermediates on a model CoOx catalyst using in situ surface-enhanced Raman spectroscopy (SERS) paired with ion-substitution experiments.
Verified the proposed catalytic mechanism across synthetic Co2+-Co3+ layered double hydroxides to determine optimal site ratios.
Octahedral Co3+ sites act as catalytic centers for converting OH- into O-O- intermediate species observed at 1140–1180 cm^-1.
Tetrahedral Co2+ sites dynamically evolve during the reaction into CoOOH (503 cm^-1) and CoO2 (560 cm^-1) active centers that mediate the release of O2 from O-O- intermediates.
Layered double hydroxides achieve maximum catalytic performance at an optimal Co2+ to Co3+ ratio of 1:1.2, successfully balancing intermediate generation and oxygen release.

Cite This Study

Hu et al. (2022) studied this question.

synapsesocial.com/papers/69df09d8de200760a86141d2 https://doi.org/10.1021/acs.analchem.2c04931

Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

View Full Paper

Ask AI

Bookmark