Hierarchical molybdenum-doped cobaltous hydroxide nanotubes assembled by cross-linked porous nanosheets with efficient electronic modulation toward overall water splitting.

Journal Article (Journal Article)

Designing hierarchical nanostructures of earth-abundant electrocatalysts for enhanced overall water splitting performance is of great significance. Herein, Mo-doped Co(OH)2 hierarchical nanotubes (Mo-Co(OH)2 HNTs) assembled by cross-linked porous nanosheets are designed and synthesized through a sacrificial template strategy. Benefiting from the hierarchical structures based on porous nanosheets with void interior as well as modified electronic structure of higher intensity of Co3+ species by Mo6+ doping, the Mo-Co(OH)2 HNTs demonstrate superior electrocatalytic performance, achieving an current density of 10 mA cm-2 at the low overpotentials of 218 mV and 125 mV for oxygen and hydrogen evolution reactions, respectively. Furthermore, an overall water splitting cell was assembled with the Mo-Co(OH)2 electrocatalyst as both the anode and cathode materials, which exhibits a driving voltage of as low as 1.62 V. The facile strategy presented in this work can be extended to the construction of various hollow/porous nanostructures with effective heteroatom doping to achieve low-cost, bifunctional and high-performance electrocatalysts for overall water splitting.

Full Text

Duke Authors

Cited Authors

  • Xu, C; Lu, W; Yan, L; Ning, J; Zheng, C; Zhong, Y; Zhang, Z; Hu, Y

Published Date

  • March 2020

Published In

Volume / Issue

  • 562 /

Start / End Page

  • 400 - 408

PubMed ID

  • 31791696

Electronic International Standard Serial Number (EISSN)

  • 1095-7103

International Standard Serial Number (ISSN)

  • 0021-9797

Digital Object Identifier (DOI)

  • 10.1016/j.jcis.2019.11.104


  • eng