NAGIOS: RODERIC FUNCIONANDO

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

Repositori DSpace/Manakin

Valencià Castellano

Inici
Investigació
e-prints
23 - Química
Visualitza element

IMPORTANT: Aquest repositori està en una versió antiga des del 3/12/2023. La nova instal.lació está en https://roderic.uv.es/

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

Mostra el registre parcial de l'element

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.citation	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.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.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	journal article	es_ES
dc.date.updated	2020-05-14T10:32:18Z
dc.identifier.doi	10.1021/acs.chemmater.9b01263
dc.identifier.idgrec	133637
dc.embargo.terms	1 year
dc.embargo.terms	2020-07-08
dc.rights.accessRights	open access	es_ES