Type

Journal Article

Authors

Takayoshi Sasaki
Daire Tyndall
Michelle P. Brown
João Coelho
Andrés Seral-Ascaso
Christopher Hobbs
Sonia Jaśkaniec
Valeria Nicolosi

Subjects

Chemistry

Topics
thermal decomposition ni fe layered double hydroxide ldh room temperature wet chemistry synthesis oxygen evolution reaction formation low temperature high temperature

Low-temperature synthesis and investigation into the formation mechanism of high quality Ni-Fe layered double hydroxides hexagonal platelets (2018)

Abstract This paper describes the wet-chemistry synthesis of highly crystalline hexagonal fakes of Ni-Fe layered double hydroxide (LDH) produced at temperature as low as 100°C. The fakes with diameter in the range of 0.5–1.5μm and the thickness between 15 and 20nm were obtained by homogeneous precipitation method with the use of triethanolamine (TEA) and urea. By analyzing the intermediate products, it is suggested that, diferently from previous reports, a thermodynamically metastable iron oxyhydroxide and Ni-TEA complex are frstly formed at room temperature. Subsequently, when the mixture is heated to 100°C and the pH increases due to the thermal decomposition of urea, Ni2+ and Fe3+ are slowly released and then recombine, thus leading to formation of pure, highly-crystalline Ni-Fe LDH fakes. This material showed promising results as an electrocatalyst in oxygen evolution reaction (OER) providing an overpotential value of 0.36V.
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Full list of authors on original publication

Takayoshi Sasaki, Daire Tyndall, Michelle P. Brown, João Coelho, Andrés Seral-Ascaso, Christopher Hobbs, Sonia Jaśkaniec, Valeria Nicolosi

Experts in our system

1
João Coelho
Trinity College Dublin
Total Publications: 10
 
2
Andrés Seral-Ascaso
Trinity College Dublin
Total Publications: 6
 
3
Christopher Hobbs
Trinity College Dublin
Total Publications: 5
 
4
Sonia Jaśkaniec
Trinity College Dublin
Total Publications: 3
 
5
Valeria Nicolosi
Trinity College Dublin
Total Publications: 67