Electrocatalyst based on Ni2P nanoparticles and NiCoP nanosheets for efficient hydrogen evolution from urea wastewater

Yutai Wu, Hui Wang, Jianwei Ren, Xiao Xu, Xuyun Wang, Rongfang Wang

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

Urea electrolysis is a promising approach to produce hydrogen while simultaneously purifying urea-rich wastewater. In practice, it is highly desirable but still challenging, through the structure construction strategy, to implement a method with controllable synthesis of ultra-thin nanosheet arrays with rich interfaces, and then apply them into the catalysis operations of hydrogen evolution reaction (HER) and urea oxidation reaction (UOR). In this work, the bifunctional electrocatalyst Ni2P/NiCoP nanosheets anchored nickel foam (NF) were prepared with ultra-thin rich interfaces by regulating the Co– and P-doping. The results showed that the elaborated Ni2P/NiCoP/NF electrode delivered the excellent electrocatalytic activities for both UOR and HER operations. Particularly for UOR, it required only a cell voltage of 1.41 V at 100 mA cm−2, which was 400 mV lower than that in the traditional overall water splitting operation.

Original languageEnglish
Pages (from-to)2932-2941
Number of pages10
JournalJournal of Colloid and Interface Science
Volume608
DOIs
Publication statusPublished - 15 Feb 2022

Keywords

  • Bifunctional catalyst
  • Heterostructures
  • Kirkendall effect
  • Rich Interfaces
  • Urea oxidation reaction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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