2D Co‐Mo‐Hydroxide‐Based Multifunctional Material for the Development of H <sub>2</sub> ‐Based Clean Energy Technologies
Abstract
Abstract Layered double hydroxides (LDH) based on transition metals are highly flexible in tailoring their dimensionality, lattice, and electronic structures, making them promising candidates as multifunctional 2D materials for the development of clean energy technologies and boosting the use of hydrogen as an energy vector. In this paper, strategic anion substitution in cobalt LDH is an appealing strategy to produce a material with two‐fold functionality, electrochemical and magnetocaloric response, offering a sustainable alternative to existing electrocatalysts and cryogenic refrigerants. It is unambiguously demonstrated that (poly)oxomolybdate‐based specimens interleave in Co LDH nanosheets up to a Co:Mo = 1:0.4 ratio, leading to an interstratified material. This intercalation greatly benefits the kinetics of the oxygen evolution reaction for H 2 production, boosting the catalytic sites due to the expansion of the interlayer space, induced by the bulky molybdates which also partially modify the Co oxidation state of αCo(OH) 2 nanolayers, favoring charge transfer. In parallel, the interleaved Mo species strengthen superexchange interactions compared with pristine α‐Co(OH) 2 , effectively adjusting the operating temperature toward the liquid hydrogen range (2030 K). This specific temperature range allows to fill a critical gap in magnetocaloric materials, as few systems can simultaneously achieve both large magnetic entropy changes and structural stability.
Article Details
Authors (15)
Daniel Muñoz‐Gil
Departamento de Química Inorgánica Facultad de Ciencias Químicas Universidad Complutense de Madrid Madrid 28040 Spain
Celia Castillo‐Blas
Instituto de Ciencia de Materiales de Madrid (ICMM) Consejo Superior de Investigaciones Científicas (CSIC) Madrid 28049 Spain
Dawid Krystian Feler
Departamento de Química Inorgánica Facultad de Ciencias Químicas Universidad Complutense de Madrid Madrid 28040 Spain
Isabel Gómez‐Recio
Departamento de Química Inorgánica Facultad de Ciencias Químicas Universidad Complutense de Madrid Madrid 28040 Spain
Miguel Tinoco
Departamento de Química Inorgánica Facultad de Ciencias Químicas Universidad Complutense de Madrid Madrid 28040 Spain
Ana Querejeta‐Fernández
Departamento de Química Inorgánica Facultad de Ciencias Químicas Universidad Complutense de Madrid Madrid 28040 Spain
Rodrigo González‐Prieto
Departamento de Química Inorgánica Facultad de Ciencias Químicas Universidad Complutense de Madrid Madrid 28040 Spain
Felipe Gándara
Materials Science Institute of Madrid, CSIC, Sor Juana Inés de la Cruz 3, Madrid 28049, Spain
Romualdo Santos Silva Jr
Instituto de Ciencia de Materiales de Madrid (ICMM) Consejo Superior de Investigaciones Científicas (CSIC) Madrid 28049 Spain
Pilar Ferrer
Carlos Prieto
Instituto de Ciencia de Materiales de Madrid (ICMM) Consejo Superior de Investigaciones Científicas (CSIC) Madrid 28049 Spain
Luc Lajaunie
Departamento de Ciencia de Los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Campus Río San Pedro S/N, Puerto Real, Cádiz 11510, Spain
José Luis Martinez‐Peña
Instituto de Ciencia de Materiales de Madrid (ICMM) Consejo Superior de Investigaciones Científicas (CSIC) Madrid 28049 Spain
María Luisa Ruiz‐González
Departamento de Química Inorgánica Facultad de Ciencias Químicas Universidad Complutense de Madrid Madrid 28040 Spain
José María González‐Calbet
Departamento de Química Inorgánica Facultad de Ciencias Químicas Universidad Complutense de Madrid Madrid 28040 Spain