Jump to main content
Jump to site search


Hierarchical nanoporous intermetallic compounds with self-grown transition-metal hydroxides as bifunctional catalysts for the alkaline hydrogen evolution reaction

Author affiliations

Abstract

The hydrogen evolution reaction (HER) is a crucial step in alkaline water electrolysis, but suffers from sluggish reaction kinetics, which calls for the development of active and robust catalysts for the highly efficient production of high-purity hydrogen. Here, we report hierarchical nanoporous (NP) transition-metal (TM = Fe, Co)-doped Pt3Al intermetallic compounds, which are composed of surface alloys of Pt and TMs with in situ self-grown TM hydroxides in an alkaline environment, NP (Pt1−xTMx)3Al/Pt-TM(OH), as highly efficient bifunctional catalysts for the HER. By virtue of the constituent Co(OH)2 having moderate hydroxyl adsorption to accelerate water dissociation and the Pt atoms facilitating the adsorption/desorption of reactive hydrogen intermediates, the NP (Pt1−xCox)3Al/Pt-Co(OH)2 exhibits superior HER activity in 0.1 M KOH, with a low Tafel slope of 48 mV dec−1 and an overpotential of ∼43 mV at 10 mA cm−2, as well as exceptional durability due to its unique nanoporous structure with stable intermetallic bonds. These electrocatalytic properties outperform state-of-the-art Pt-based catalysts, suggesting that multi-site design is suitable for producing highly efficient catalysts towards the HER in alkaline environments.

Graphical abstract: Hierarchical nanoporous intermetallic compounds with self-grown transition-metal hydroxides as bifunctional catalysts for the alkaline hydrogen evolution reaction

Back to tab navigation

Supplementary files

Publication details

The article was received on 28 Sep 2019, accepted on 23 Oct 2019 and first published on 23 Oct 2019


Article type: Paper
DOI: 10.1039/C9TA10726F
J. Mater. Chem. A, 2019, Advance Article

  •   Request permissions

    Hierarchical nanoporous intermetallic compounds with self-grown transition-metal hydroxides as bifunctional catalysts for the alkaline hydrogen evolution reaction

    L. Han, R. Yao, W. Wan, H. Shi, Z. Wen, X. Lang and Q. Jiang, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C9TA10726F

Search articles by author

Spotlight

Advertisements