Influence of the Interlayer Space on the Water Oxidation Performance in a Family of Surfactant-Intercalated NiFe-Layered Double Hydroxides
NAGIOS: RODERIC FUNCIONANDO

Influence of the Interlayer Space on the Water Oxidation Performance in a Family of Surfactant-Intercalated NiFe-Layered Double Hydroxides

DSpace Repository

Influence of the Interlayer Space on the Water Oxidation Performance in a Family of Surfactant-Intercalated NiFe-Layered Double Hydroxides

Show simple item record

dc.contributor.author Carrasco Andrés, José Alberto
dc.contributor.author Sanchis Gual, Roger
dc.contributor.author Seijas-Da Silva, Alvaro
dc.contributor.author Abellán Sáez, Gonzalo
dc.contributor.author Coronado Miralles, Eugenio
dc.date.accessioned 2020-05-14T10:32:17Z
dc.date.available 2020-05-14T10:32:17Z
dc.date.issued 2019
dc.identifier.uri https://hdl.handle.net/10550/74618
dc.description.abstract Layered double hydroxides (LDHs) are low dimensional materials that act as benchmark catalysts for the oxygen evolution reaction (OER). Many LDH properties affecting the OER have been studied to reach the optimal efficiency but no systematic studies concerning the influence of the interlayer space have been developed. In this context, these materials allow a large tunability in their chemical composition enabling the substitution of the interlayer anion and therefore modifying exclusively the basal space. Here, we synthesize by anion exchange reactions a surfactantintercalated family of NiFe-LDHs with increasing basal spacing ranging from 8.0 to 31.6 Å (one of the largest reported so far for a NiFe-LDH) while the electrochemical OER performance of this family of compounds was explored to analyse the interlayer distance effect keeping similar morphology, dimensions and metallic composition. Results show the increase of the LDH basal space undergo to lower Tafel slopes, higher electrochemical surface area and a reduction of the resistance related to the chemisorption of oxygen leading to better kinetic behaviour, showing an optimum enhancement of the electrocatalytic performance for the NiFe-dodecyl sulphate (basal space of 25 Å). Interestingly, the NiFe-dodecyl sulphate exhibits optimum proton diffusion values, indeed a further increment in the basal space compromises the onset potential, a fact that could be related to an increase in the hydrophobicity between the layers. Moreover, by judicious tuning of the interlayer space, it is possible to reach a Tafel slope value for the most spaced LDH (NiFe-octadecyl sulphate, basal space of 31.6 Å), similar to the one obtained for exfoliated NiFe nanosheets, showing a much better long‐time stability due to the three‐dimensional robustness of the catalysts. This work illustrates the importance of molecular engineering in the design of novel highly active catalysts and provides important insights into the understanding of basic principles of oxygen evolution reaction in NiFe-LDHs.
dc.language.iso eng
dc.relation.ispartof Chemistry of Materials, 2019, vol. 31, p. 6798-6807
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Carrasco Andrés, Jose Alberto Sanchis Gual, Roger Seijas-Da Silva, Alvaro Abellán Sáez, Gonzalo Coronado Miralles, Eugenio 2019 Influence of the Interlayer Space on the Water Oxidation Performance in a Family of Surfactant-Intercalated NiFe-Layered Double Hydroxides Chemistry of Materials 31 6798 6807
dc.subject Materials
dc.title Influence of the Interlayer Space on the Water Oxidation Performance in a Family of Surfactant-Intercalated NiFe-Layered Double Hydroxides
dc.type info:eu-repo/semantics/article
dc.date.updated 2020-05-14T10:32:18Z
dc.identifier.doi https://doi.org/10.1021/acs.chemmater.9b01263
dc.identifier.idgrec 133637
dc.embargo.terms 1 year
dc.embargo.terms 2020-07-08

View       (2.468Mb)

This item appears in the following Collection(s)

Show simple item record

Search DSpace

Advanced Search

Browse

Statistics