A rational method to kinetically control the rate-determining step to explore efficient electrocatalysts for the oxygen evolution reaction

Nam Hee Kwon, Minho Kim, Xiaoyan Jin, Joohyun Lim, In Young Kim, Nam Suk Lee, Hyungjun Kim, Seong Ju Hwang

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A novel, rational, and efficient way to explore high-performance electrocatalysts was developed by controlling the reaction kinetics of the rate-determining step (RDS). Density functional theory (DFT) calculations demonstrate that the RDS for the oxygen evolution reaction driven by transition metal hydroxides/oxides, i.e., surface adsorption of OH/OOH species, can be significantly promoted by increasing the electrophilicity of electrocatalysts via hybridization with electron-withdrawing inorganic nanosheets. As predicted by DFT calculation, the hybridization of Ni–Fe-layered double hydroxide (LDH)/Ni–Co-LDH, with RuO2 nanosheets (1.0 wt%) leads to significant lowering of the overpotentials to 207/276 mV at 10 mA cm−2, i.e., one of the smallest overpotentials for LDH-based materials, with the increase in the current density. The necessity of a very small amount of RuO2 nanosheets (1.0 wt%) to optimize the electrocatalyst activity highlights the remarkably high efficiency of the RuO2 addition. The present study underscores the importance of kinetic control of the RDS via hybridization with electron-withdrawing species for exploring novel efficient electrocatalysts.

Original languageEnglish
Pages (from-to)659-669
Number of pages11
JournalNPG Asia Materials
Volume10
Issue number7
DOIs
Publication statusPublished - 2018 Jul 1

Fingerprint

Oxygen Evolution
electrocatalysts
Electrocatalysts
hydroxides
Nanosheets
Oxygen
Density Functional
oxygen
Electron
Density functional theory
Reaction Kinetics
Hydroxides
density functional theory
Adsorption
High Efficiency
Oxides
Electrons
High Performance
Metals
Kinetics

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Kwon, Nam Hee ; Kim, Minho ; Jin, Xiaoyan ; Lim, Joohyun ; Kim, In Young ; Lee, Nam Suk ; Kim, Hyungjun ; Hwang, Seong Ju. / A rational method to kinetically control the rate-determining step to explore efficient electrocatalysts for the oxygen evolution reaction. In: NPG Asia Materials. 2018 ; Vol. 10, No. 7. pp. 659-669.
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A rational method to kinetically control the rate-determining step to explore efficient electrocatalysts for the oxygen evolution reaction. / Kwon, Nam Hee; Kim, Minho; Jin, Xiaoyan; Lim, Joohyun; Kim, In Young; Lee, Nam Suk; Kim, Hyungjun; Hwang, Seong Ju.

In: NPG Asia Materials, Vol. 10, No. 7, 01.07.2018, p. 659-669.

Research output: Contribution to journalArticle

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AU - Kwon, Nam Hee

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AU - Kim, In Young

AU - Lee, Nam Suk

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AU - Hwang, Seong Ju

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