Metal Atom-Doped Co3O4 Hierarchical Nanoplates for Electrocatalytic Oxygen Evolution

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

397 Scopus Citations
View graph of relations

Author(s)

  • Song Lin Zhang
  • Bu Yuan Guan
  • Xue Feng Lu
  • Shibo Xi
  • Yonghua Du

Detail(s)

Original languageEnglish
Article number2002235
Journal / PublicationAdvanced Materials
Volume32
Issue number31
Online published26 Jun 2020
Publication statusPublished - 6 Aug 2020
Externally publishedYes

Link(s)

Abstract

Electrocatalysts based on hierarchically structured and heteroatom-doped non-noble metal oxide materials are of great importance for efficient and low-cost electrochemical water splitting systems. Herein, the synthesis of a series of hierarchical hollow nanoplates (NPs) composed of ultrathin Co3O4 nanosheets doped with 13 different metal atoms is reported. The synthesis involves a cooperative etching−coordination−reorganization approach starting from zeolitic imidazolate framework-67 (ZIF-67) NPs. First, metal atom decorated ZIF-67 NPs with unique cross-channels are formed through a Lewis acid etching and metal species coordination process. Afterward, the composite NPs are converted to hollow Co3O4 hierarchical NPs composed of ultrathin nanosheets through a solvothermal reaction, during which the guest metal species is doped into the octahedral sites of Co3O4. Density functional theory calculations suggest that doping of small amount of Fe atoms near the surface of Co3O4 can greatly enhance the electrocatalytic activity toward the oxygen evolution reaction (OER). Benefiting from the structural and compositional advantages, the obtained Fe-doped Co3O4 hierarchical NPs manifest superior electrocatalytic performance for OER with an overpotential of 262 mV at 10 mA cm−2, a Tafel slope of 43 mV dec−1, and excellent stability even at a high current density of 100 mA cm−2 for 50 h. © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Research Area(s)

  • atom doping, Co3O4, hollow nanoplates, nanosheets, oxygen evolution reaction

Citation Format(s)

Metal Atom-Doped Co3O4 Hierarchical Nanoplates for Electrocatalytic Oxygen Evolution. / Zhang, Song Lin; Guan, Bu Yuan; Lu, Xue Feng et al.
In: Advanced Materials, Vol. 32, No. 31, 2002235, 06.08.2020.

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

Download Statistics

No data available