Hierarchical microspheres of Co2CrO4 nanoplates for electrocatalytic water oxidation

Aksoy, Izel; Cetin, A.; Esentürk, Emren Nalbant

doi:10.1007/s11051-020-04907-6

Cited by 5 publications

(2 citation statements)

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“…Since a single transition metal centre is limited in extending an adequate bond strength, incorporation of another transition metal is adopted to modulate the bond strength. Incorporation of Cr 3+ has shown to substantially improve the OER activity and stability of the catalysts [81,82] . Though an empty e g orbital of the Cr 3+ conforms to strong OER intermediate bonding, [83] the influence of the t 2g 3 e 0 g electronic configuration of the Cr 3+ ion in LDHs considerably enhances charge transfer and conductive nature [41,43] .…”

Section: Chromium Electrocatalysts For Oer In Alkaline Mediummentioning

confidence: 99%

“…Incorporation of Cr 3 + has shown to substantially improve the OER activity and stability of the catalysts. [81,82] Though an empty e g orbital of the Cr 3 + conforms to strong OER intermediate bonding, [83] the influence of the t 2g 3 e 0 g electronic configuration of the Cr 3 + ion in LDHs considerably enhances charge transfer and conductive nature. [41,43] Notably, the electronic interaction of Cr 3 + with Ni 2 + is a predominant reason for efficient HER catalysis in NiCr systems.…”

Section: Chromium-based Hydroxides Oxides and Perovskitesmentioning

confidence: 99%

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Recent Developments on Cr‐Based Electrocatalysts for the Oxygen Evolution Reaction in Alkaline Media

Babu

Falch

2022

ChemCatChem

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Among a plethora of transition-metal catalysts explored for the oxygen evolution reaction (OER) in water electrolysis, the use of chromium (Cr) as a component, has only recently started to gain momentum. In this review, recent investigations where Cr has been utilised for alkaline OER has been summarised and evaluated. The Cr-based electrocatalysts have been categorised and discussed according to their anion counterparts. From the majority of reviewed studies, Cr comes across as a beneficial co-catalyst owing to its ability to act as either an electron acceptor or electron donor. This characteristic property stems from the many possible oxidation states of Cr, with Cr 3 + and Cr 6 + being the most pronounced states. This review emphasises on providing a holistic view of the role Cr plays in OER electrocatalysis, focussing mainly on the correlations of activity, structure, and electronic configuration.

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Section: Chromium Electrocatalysts For Oer In Alkaline Mediummentioning

confidence: 99%