articleACS Applied Materials & InterfacesMar 25, 2017Closed access

Hierarchical NiCo 2 S 4 @NiFe LDH Heterostructures Supported on Nickel Foam for Enhanced Overall-Water-Splitting Activity

JLJia LiuJWJinsong WangBZBao ZhangYRYunjun RuanLLLin Lv

Huazhong University of Science and Technology

PubMed
Indexed incrossrefpubmed

Abstract

Low-cost and highly efficient bifunctional electrocatalysts for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) are intensively investigated for overall water splitting. Herein, we combined experimental research with first-principles calculations based on density functional theory (DFT) to engineer the NiCo2S4@NiFe LDH heterostructure interface for enhancing overall water-splitting activity. The DFT calculations exhibit strong interaction and charge transfer between NiCo2S4 and NiFe LDH, which change the interfacial electronic structure and surface reactivity. The calculated chemisorption free energy of hydroxide (ΔEOH) is reduced from 1.56 eV for pure NiFe LDH to 1.03 eV for the…

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Authors

9

Topics & keywords

Topics
Keywords
  • Materials science
  • Nickel
  • Water splitting
  • Heterojunction
  • Chemical engineering
  • Nanotechnology
  • Catalysis
  • Inorganic chemistry
UN Sustainable Development Goals
  • Clean water and sanitation
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