Achieving favourable oxygen electrocatalytic activity with compositionally complex metal molybdates

Beere, Hemanth Kumar; Kulkarni, Pranav; Maiti, Uday Narayan; Balakrishna, R. Geetha; Mukherjee, Prabuddha; Jung, Hyun Young; Samanta, Ketaki; Ghosh, Debasis

doi:10.1039/d3se00736g

Cited by 5 publications

(1 citation statement)

References 80 publications

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“…In addition, we observed that the Tafel slope of the HEO-3CNF electrode (119.7 mV/dec) is lower than that of the CuO electrode (131.7 mV/dec). Its comparison with previous studies is compiled in Table S4 [92,93]. This work may provide a general strategy for preparing novel, cost-effective, high-entropy electrodes for water splitting, as well as for use as energy storage materials.…”

Section: Discussionmentioning

confidence: 95%

A Cost-Effective, Nanoporous, High-Entropy Oxide Electrode for Electrocatalytic Water Splitting

Liu,

Yin,

Lin

et al. 2023

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High-entropy materials have attracted extensive attention as emerging electrode materials in various energy applications due to their flexible tunability, unusual outstanding activities, and cost-effectiveness using multiple earth-abundant elements. We introduce a novel high-entropy composite oxide with the five elements of Cu, Ni, Co, Fe, and Cr (HEO-3CNF) for use in the oxygen evolution reaction (OER) in electrocatalytic water splitting. HEO-3CNF is composed of two phases with a non-equimolar, deficient high-entropy spinel oxide of (Cu0.2−xNi0.2Co0.2Fe0.2Cr0.2)3O4 and monoclinic copper oxide (CuO). Electrochemical impedance spectroscopy (EIS) with distribution of relaxation times (DRT) analysis validates that the HEO-3CNF-based electrode exhibits faster charge transfer than benchmark CuO. It results in improved OER performance with a lower overpotential at 10 mA/cm2 and a Tafel slope than CuO (518.1 mV and 119.7 mV/dec versus 615.9 mV and 131.7 mV/dec, respectively) in alkaline conditions. This work may provide a general strategy for preparing novel, cost-effective, high-entropy electrodes for water splitting.

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Section: Discussionmentioning

confidence: 95%

A Cost-Effective, Nanoporous, High-Entropy Oxide Electrode for Electrocatalytic Water Splitting

Liu,

Yin,

Lin

et al. 2023

Coatings

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Compositionally complex ball-in-ball type metal oxide anode via laser-induced fast fabrication for binder-free high-capacity Li-ion batteries

Beere,

Reddy,

Kulkarni

et al. 2024

Journal of Energy Storage

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Deep eutectic solvent-mediated synthesis of CuCo2O4 @ Sargassum tenerrimum derived carbon heterostructure as an efficient electrocatalyst for oxygen and hydrogen evolution reactions

Attokkaran,

Beere,

Samage

et al. 2024

International Journal of Hydrogen Energy

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Achieving favourable oxygen electrocatalytic activity with compositionally complex metal molybdates

Abstract: Tuning the surface binding of the active species or intermediates with the catalyst is an important consideration while designing high performance electrocatalyst. In this respect, high entropy materials have aroused...

Cited by 5 publications

References 80 publications

A Cost-Effective, Nanoporous, High-Entropy Oxide Electrode for Electrocatalytic Water Splitting

A Cost-Effective, Nanoporous, High-Entropy Oxide Electrode for Electrocatalytic Water Splitting

Compositionally complex ball-in-ball type metal oxide anode via laser-induced fast fabrication for binder-free high-capacity Li-ion batteries

Deep eutectic solvent-mediated synthesis of CuCo2O4 @ Sargassum tenerrimum derived carbon heterostructure as an efficient electrocatalyst for oxygen and hydrogen evolution reactions

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