Mn promotion of rutile TiO2-RuO2 anodes for water oxidation in acidic media

Marco Etzi Coller Pascuzzi; Andrey Goryachev; Jan P. Hofmann; Emiel J.M. Hensen

doi:10.1016/j.apcatb.2019.118225

Mn promotion of rutile TiO2-RuO2 anodes for water oxidation in acidic media

Marco Etzi Coller Pascuzzi, Andrey Goryachev, Jan P. Hofmann (Corresponding author), Emiel J.M. Hensen (Corresponding author)

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Abstract

A method to reduce noble metal content in oxygen-evolving electrocatalysts suitable to work in acidic media is presented. TiO₂-RuO₂ anodes can be promoted by Mn, resulting in increased activity and stability. The most active composition displayed an overpotential of 386 mV at a current density of 10 mA cm^–2, and a Tafel slope of 50 mV dec^–1. This anode only included 17 at% Ru out of the total amount of metals included in the film. We investigated the influence of Mn addition to TiO₂-RuO₂ on the structure, morphology, and surface area, and related differences to catalytic activity and stability. We found that increased porosity of the anode film by Mn addition and Mn inclusion in the TiO₂-RuO₂ lattice can explain the enhanced catalytic activity. A detailed characterization of fresh and used anodes provided insight into structural modifications induced by electrochemical treatment.

Original language	English
Article number	118225
Number of pages	11
Journal	Applied Catalysis. B, Environmental
Volume	261
DOIs	https://doi.org/10.1016/j.apcatb.2019.118225
Publication status	Published - 1 Feb 2020

Keywords

Manganese
Oxygen evolution reaction
RuO
TiO
Water splitting

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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title = "Mn promotion of rutile TiO2-RuO2 anodes for water oxidation in acidic media",

abstract = "A method to reduce noble metal content in oxygen-evolving electrocatalysts suitable to work in acidic media is presented. TiO2-RuO2 anodes can be promoted by Mn, resulting in increased activity and stability. The most active composition displayed an overpotential of 386 mV at a current density of 10 mA cm–2, and a Tafel slope of 50 mV dec–1. This anode only included 17 at% Ru out of the total amount of metals included in the film. We investigated the influence of Mn addition to TiO2-RuO2 on the structure, morphology, and surface area, and related differences to catalytic activity and stability. We found that increased porosity of the anode film by Mn addition and Mn inclusion in the TiO2-RuO2 lattice can explain the enhanced catalytic activity. A detailed characterization of fresh and used anodes provided insight into structural modifications induced by electrochemical treatment.",

keywords = "Manganese, Oxygen evolution reaction, RuO, TiO, Water splitting",

author = "{Etzi Coller Pascuzzi}, Marco and Andrey Goryachev and Hofmann, {Jan P.} and Hensen, {Emiel J.M.}",

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T1 - Mn promotion of rutile TiO2-RuO2 anodes for water oxidation in acidic media

AU - Etzi Coller Pascuzzi, Marco

AU - Goryachev, Andrey

AU - Hofmann, Jan P.

AU - Hensen, Emiel J.M.

PY - 2020/2/1

Y1 - 2020/2/1

N2 - A method to reduce noble metal content in oxygen-evolving electrocatalysts suitable to work in acidic media is presented. TiO2-RuO2 anodes can be promoted by Mn, resulting in increased activity and stability. The most active composition displayed an overpotential of 386 mV at a current density of 10 mA cm–2, and a Tafel slope of 50 mV dec–1. This anode only included 17 at% Ru out of the total amount of metals included in the film. We investigated the influence of Mn addition to TiO2-RuO2 on the structure, morphology, and surface area, and related differences to catalytic activity and stability. We found that increased porosity of the anode film by Mn addition and Mn inclusion in the TiO2-RuO2 lattice can explain the enhanced catalytic activity. A detailed characterization of fresh and used anodes provided insight into structural modifications induced by electrochemical treatment.

AB - A method to reduce noble metal content in oxygen-evolving electrocatalysts suitable to work in acidic media is presented. TiO2-RuO2 anodes can be promoted by Mn, resulting in increased activity and stability. The most active composition displayed an overpotential of 386 mV at a current density of 10 mA cm–2, and a Tafel slope of 50 mV dec–1. This anode only included 17 at% Ru out of the total amount of metals included in the film. We investigated the influence of Mn addition to TiO2-RuO2 on the structure, morphology, and surface area, and related differences to catalytic activity and stability. We found that increased porosity of the anode film by Mn addition and Mn inclusion in the TiO2-RuO2 lattice can explain the enhanced catalytic activity. A detailed characterization of fresh and used anodes provided insight into structural modifications induced by electrochemical treatment.

KW - Manganese

KW - Oxygen evolution reaction

KW - RuO

KW - TiO

KW - Water splitting

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U2 - 10.1016/j.apcatb.2019.118225

DO - 10.1016/j.apcatb.2019.118225

M3 - Article

AN - SCOPUS:85072761887

SN - 0926-3373

VL - 261

JO - Applied Catalysis. B, Environmental

JF - Applied Catalysis. B, Environmental

M1 - 118225

ER -

Mn promotion of rutile TiO2-RuO2 anodes for water oxidation in acidic media

Abstract

Keywords

UN SDGs

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