Article Tunable heteroassembly of 2D CoNi LDH and Ti3C2 nanosheets with enhanced electrocatalytic activity for oxygen evolution

Xueyi Lu ; Lulu Jia ; Minchen Hou ; Xuemin Wu ; Chang Ni ; Gaofei Xiao ORCID ; Renzhi Ma SAMURAI ORCID ; Xia Lu ORCID

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Xueyi Lu, Lulu Jia, Minchen Hou, Xuemin Wu, Chang Ni, Gaofei Xiao, Renzhi Ma, Xia Lu. Tunable heteroassembly of 2D CoNi LDH and Ti3C2 nanosheets with enhanced electrocatalytic activity for oxygen evolution. Nanoscale. 2024, 17 (2), 1080-1091. https://doi.org/10.1039/d4nr03679d

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(abstract)

The sluggish kinetics of oxygen evolution reaction (OER) are bottlenecks to develop hydrogen energy based on water electrolysis, which can be significantly improved using high performance catalyst. In this context, the CoNi layered double hydroxide (LDH)/Ti3C2 heterostructures are obtained using electrostatic attraction of the positively charged LDH and negatively charged Ti3C2 nanosheets as catalyst to optimize the OER　performance. Such alternately stacking exhibits good catalytic activity with a lower overpotential and a small Tafel slope, outperforming their individual components. The results by density functional theory (DFT) simulation find that the charge transfers from Ti3C2 to CoNi LDH, not only adjust the electron distribution, but also increase the electron density of the interfacial active sites, thus enhances the electron transfer efficiency inside the heterostructures. Moreover, the cobalt and nickel ions exhibit a synergistic effect in supplying more electrons to adsorb the adjacent intermediates with the active hydrogen and oxygen vacancies, to improve the adsorption capability and reduce the reaction energy barriers. These findings provide a rewarding avenue towards the design of highly efficient electrocatalysts for OER.

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Keyword: MXene, Layered double hydroxide, Heterostructure, Oxygen evolution reaction

Date published: 2024-11-21

Publisher: Royal Society of Chemistry (RSC)

Journal:

  • Nanoscale (ISSN: 20403364) vol. 17 issue. 2 p. 1080-1091

Funding:

  • National Natural Science Foundation of China 22209213
  • Natural Science Foundation of Guangdong Province 2022A1515010405
  • Japan Society for the Promotion of Science 22K18956
  • Natural Science Foundation of Guangdong Province 2024A1515010284

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5336

First published URL: https://doi.org/10.1039/d4nr03679d

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Updated at: 2025-11-21 08:30:04 +0900

Published on MDR: 2025-11-21 08:24:28 +0900

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