Methacrylated gelatin-embedded fabrication of 3D graphene-supported Co 3 O 4 nanoparticles for water splitting

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

11 Scopus Citations
View graph of relations

Author(s)

  • Minghao Zhuang
  • Zhenjing Liu
  • Yao Ding
  • Gui-Liang Xu
  • Yuhui Li
  • Abhishek Tyagi
  • Xiaoyi Zhang
  • Cheng-Jun Sun
  • Xuewu Ou
  • Hoilun Wong
  • Yuting Cai
  • Ruizhe Wu
  • Irfan Haider Abidi
  • Qicheng Zhang
  • Feng Xu
  • Khalil Amine
  • Zhengtang Luo

Detail(s)

Original languageEnglish
Pages (from-to)6866-6875
Journal / PublicationNanoscale
Volume11
Issue number14
Publication statusPublished - 14 Apr 2019
Externally publishedYes

Abstract

We developed a general platform for the fabrication of transition metal oxide nanoparticles supported by a graphene foam (GF) by first coating it with a methacrylated gelatin (GelMA) hydrogel, which served as a 3D matrix for nanoparticle dispersion. The engineered GelMA/GF matrix was hydrophilic with good mechanical strength and high conductivity, therefore providing a good platform for the dispersion of a variety of metal/oxide precursors. Due to this platform, well-dispersed Co 3 O 4 nanoparticles with the smallest size of 3 nm assembled on the nitrogen-doped graphene foam (Co 3 O 4 /NGF). The crystalline transformation from a CoCl 2 [H 2 O] 2 precursor to Co 3 O 4 was revealed by in operando X-ray diffraction and absorption techniques. After applying Co 3 O 4 /NGF as a free-standing electrocatalyst for water splitting, the nanoparticles of size 3 nm exhibited optimal catalytic activity in alkaline media; the corresponding cell could promote water splitting at a current density of 10 mA cm -2 with only 1.63 V and exhibited excellent stability in a 25 h long-term operation. Our results demonstrate that the GelMA hydrogel-coated 3D graphene foam can be a promising platform for the design and fabrication of graphene-based multifunctional materials.

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Methacrylated gelatin-embedded fabrication of 3D graphene-supported Co 3 O 4 nanoparticles for water splitting. / Zhuang, Minghao; Liu, Zhenjing; Ding, Yao; Xu, Gui-Liang; Li, Yuhui; Tyagi, Abhishek; Zhang, Xiaoyi; Sun, Cheng-Jun; Ren, Yang; Ou, Xuewu; Wong, Hoilun; Cai, Yuting; Wu, Ruizhe; Abidi, Irfan Haider; Zhang, Qicheng; Xu, Feng; Amine, Khalil; Luo, Zhengtang.

In: Nanoscale, Vol. 11, No. 14, 14.04.2019, p. 6866-6875.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review