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

doi:10.1021/acscatal.0c00105

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

Department of Chemistry

Research output: Contribution to journal › Comment/debate

27 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 Ni_xFe_yTi_zOOH. 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 language	English
Pages (from-to)	4879-4887
Number of pages	9
Journal	ACS Catalysis
Volume	10
Issue number	9
DOIs	https://doi.org/10.1021/acscatal.0c00105
State	Published - 1 May 2020

Bibliographical note

Publisher Copyright:
Copyright © 2020 American Chemical Society.

Funding

The authors thank The Israeli Ministry of Energy, VATAT, and the Fuel Choices and Smart Mobility Initiative in the Israeli Prime Minister’s Office for supporting this work. W.M. thanks the Israeli Ministry of Absorption and Integration for his scholarship. This work was done in the framework of the Israeli Fuel Cells consortium (part of the Israeli National Center for Electrochemical Propulsion). This research was supported by the Nancy and Stephen Grand Technion Energy Program (GTEP) . The authors thank The Israeli Ministry of Energy VATAT, and the Fuel Choices and Smart Mobility Initiative in the Israeli Prime Minister?s Office for supporting this work. W.M. thanks the Israeli Ministry of Absorption and Integration for his scholarship. This work was done in the framework of the Israeli Fuel Cells consortium (part of the Israeli National Center for Electrochemical Propulsion). This research was supported by the Nancy and Stephen Grand Technion Energy Program (GTEP).

Funders	Funder number
Israeli Fuel Cells Consortium
Israeli Ministry of Absorption
Israeli Ministry of Energy VATAT
Israeli Prime Minister?s Office
Israeli Prime Minister’s Office
Ministry of Aliyah and Immigrant Absorption
Israel National Research Center for Electrochemical Propulsion
Ministry of Energy, Israel

Keywords

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

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10.1021/acscatal.0c00105

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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.",

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

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Keywords

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