Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 562, Issue -, Pages 400-408Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.11.104
Keywords
Mo-doped Co(OH)(2); Sacrificial template method; Hierarchical tubular structures; Cross-linked porous nanosheets; Overall water splitting
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Funding
- Natural Science Foundation of China [21671173]
- Zhejiang Provincial Ten Thousand Talent Program [2017R52043]
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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. (C) 2019 Elsevier Inc. All rights reserved.
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