Surface-Exposed Single-Ni Atoms with Potential-Driven Dynamic Behaviors for Highly Efficient Electrocatalytic Oxygen Evolution

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Yafei Zhao
  • Xue Feng Lu
  • Guilan Fan
  • Xiaojun Gu

Detail(s)

Original languageEnglish
Article numbere202212542
Journal / PublicationAngewandte Chemie - International Edition
Volume61
Issue number45
Online published12 Sept 2022
Publication statusPublished - 7 Nov 2022
Externally publishedYes

Abstract

Trapping the active sites on the exterior surface of hollow supports can reduce mass transfer resistance and enhance atomic utilization. Herein, we report a facile chemical vapor deposition strategy to synthesize single-Ni atoms decorated hollow S/N-doped football-like carbon spheres (Ni SAs@S/N-FCS). Specifically, the CdS@3-aminophenol/formaldehyde is carbonized into S/N-FCS. The gas-migrated Ni species are anchored on the surface of S/N-FCS simultaneously, yielding Ni SAs@S/N-FCS. The obtained catalyst exhibits outstanding performance for alkaline oxygen evolution reaction (OER) with an overpotential of 249 mV at 10 mA cm−2, a small Tafel slope of 56.5 mV dec−1, and ultra-long stability up to 166 hours without obvious fading. Moreover, the potential-driven dynamic behaviors of Ni-N4 sites and the contribution of the S dopant at different locations in the matrix to the OER activity are revealed by the operando X-ray absorption spectroscopy and theoretical calculations, respectively. © 2022 Wiley-VCH GmbH.

Research Area(s)

  • Electrocatalysis, Hollow S/N-Doped Carbon Spheres, Oxygen Evolution Reaction, Single-Ni Atoms

Citation Format(s)

Surface-Exposed Single-Ni Atoms with Potential-Driven Dynamic Behaviors for Highly Efficient Electrocatalytic Oxygen Evolution. / Zhao, Yafei; Lu, Xue Feng; Fan, Guilan et al.
In: Angewandte Chemie - International Edition, Vol. 61, No. 45, e202212542, 07.11.2022.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review