Ternary NiFeTiOOH Catalyst for the Oxygen Evolution Reaction: Study of the Effect of the Addition of Ti at Different Loadings

Wenjamin Moschkowitsch, Kapil Dhaka, Shmuel Gonen, Rinat Attias, Yoed Tsur, Maytal Caspary Toroker, Lior Elbaz

Research output: Contribution to journalComment/debate

24 Scopus citations

Abstract

The world's shift to the production of energy from sustainable sources requires the development of large energy storage. One of the best methods to store surplus energy produced from environmentally friendly methods is as elemental hydrogen, using electrolysis in alkaline electrolyzers. Currently, this technology is hampered by the sluggish oxygen evolution reaction (OER), which limits its overall efficiency and durability. One of the most popular directions is to develop cheap, durable, and active platinum-group-metal-free (PGM-free) catalysts. In this category, the benchmark catalyst is NiFeOOH. Here, synthetic, electrochemical, spectroscopic, and theoretical methods were used to design, synthesize, and investigate novel PGM-free catalysts with enhanced durability and activity. Using an easy and cheap one-step synthetic precipitation method, titanium atoms in various amounts were introduced in the NiFeOOH structure, forming NixFeyTizOOH. One of these compounds (Ni:Fe:Ti = 85.75:7.70:6.55) shows a very low overpotential on GC (400 mV, at a current density of 10 mA/cm2) and high current density (27.9 mA cm-2) at a potential of 1.8 V vs RHE. This is a higher activity toward the OER in comparison to the benchmark catalyst; in addition, the compound has higher stability at prolonged exposure to high potentials.

Original languageEnglish
Pages (from-to)4879-4887
Number of pages9
JournalACS Catalysis
Volume10
Issue number9
DOIs
StatePublished - 1 May 2020

Bibliographical note

Publisher Copyright:
Copyright © 2020 American Chemical Society.

Keywords

  • PGM-free
  • electrocatalysis
  • electrolyzer
  • mixed-metal oxides
  • oxygen evolution reaction

Fingerprint

Dive into the research topics of 'Ternary NiFeTiOOH Catalyst for the Oxygen Evolution Reaction: Study of the Effect of the Addition of Ti at Different Loadings'. Together they form a unique fingerprint.

Cite this