Jump to main content
Jump to site search


High-efficient electrocatalysts by unconventional acid-etching for overall water splitting

Author affiliations

Abstract

Recent advances in doping and heterostructuring based on earth-abundant two-dimensional nanoframeworks provide new possibilities in electrocatalysis. In this study, a novel, unconventional, one-step self-regulating acid-etching strategy was developed to prepare two-tiered hierarchical Fe-doped and Pt-decorated nickel hydroxide nanosheets selectively for efficient oxygen evolution and hydrogen evolution reactions. The combinatorial hydrolysis of Ni ions in a self-limiting acidic environment induces selective growth of disparate dimension nanosheets. The proposed strategy, avoiding multifold structural design challenges, delivers highly exposed active sites and robust catalyst/support interfaces. Moreover, the exquisite structure and synergetic heterostructure modulation afford kinetically favorable electrolyte mass transport, and gas bubble release. Consequently, the structurally well-designed and hetero-coordinated electrodes attest highly efficient oxygen evolution with a low Tafel slope of 70.6 mV dec−1 and overpotential of 300 mV at a current density of 10 mA cm−2, while it 30.4 mV dec−1 and 37 mV for hydrogen evolution, which rival performances of state-of-the-art electrocatalysts.

Graphical abstract: High-efficient electrocatalysts by unconventional acid-etching for overall water splitting

Back to tab navigation

Supplementary files

Publication details

The article was received on 07 Oct 2017, accepted on 30 Oct 2017 and first published on 31 Oct 2017


Article type: Paper
DOI: 10.1039/C7TA08826D
Citation: J. Mater. Chem. A, 2017, Advance Article
  •   Request permissions

    High-efficient electrocatalysts by unconventional acid-etching for overall water splitting

    H. Wu, T. Zhu, X. Lu and G. W. Ho, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA08826D

Search articles by author

Spotlight

Advertisements