Blue‐light‐excited NaCe(MoO₄)₂ microcrystals for photoelectrochemical water splitting

Abstract

The conversion of sunlight into electric power is a hot-topic due the current global energy crisis. 1 In this sense, the production of hydrogen and oxygen by water splitting into photoelectrochemical cells has become a strong trend toward sustainable energy generation. 2 New materials with energy conversion properties can be proposed as innovative strategies for obtaining clean energy. The production of micro/ nanostructures activated by visible light has been adopted by the scientific community to overcome this problem. [3][4][5] Molybdates have attracted the attention of several research groups mainly due to their energy conversion applications as photocatalysts, 6 photoanodes, 5 anodic materials for sodium-ion batteries, 7 and modifiers for gas sensors. 8 In particular, sodium-cerium molybdate-NaCe(MoO 4 ) 2 -is a scheelite-type semiconductor material with an energy band gap (E gap ) between 2.57 and 2.58 eV, 9,10 and stands out for its

A truncated octahedron NaCe(MoO4)2 nanostructure: a potential material for blue emission and acetone sensing

“…The other two Raman peaks at 823 and 889 cm −1 are assigned to (O → Mo → O) antisymmetric stretching B g and (O ← Mo → O) symmetric A g mode of vibration. 29,34,35 The decrease in Raman intensity with increasing Na 3 Cit concentration is believed to be related to the increase of V O and antisite defects, in agreement with the XRD and FTIR studies. 36,37…”

“…The other two Raman peaks at 823 and 889 cm À1 are assigned to (O -Mo -O) antisymmetric stretching B g and (O ' Mo -O) symmetric A g mode of vibration. 29,34,35 The decrease in Raman intensity with increasing Na 3 Cit concentration is believed to be related to the increase of V O and antisite defects, in agreement with the XRD and FTIR studies. 36,37 X-Ray photoelectron spectroscopy (XPS), a well-known technique to investigate the chemical state of elements, was adopted here to examine V O -associated changes in the valence states of Na, Ce, Mo and O, as they are highly sensitive to the local electronic environment.…”

Advances in Functional Ceramics for Water Splitting: A Comprehensive Review

“…Moreover, the use of molybdates in photoelectrochemical water splitting has shown promising results, with molybdate-based microcrystals exhibiting efficient water splitting under blue-light excitation [103]. The energy conversion applications of molybdates as photocatalysts and anodic materials for batteries underscore their versatility in harnessing solar energy for water-splitting processes.…”

Exploring the Thermal-Oxidative Stability of Azithromycin Using a Thermoactivated Sensor Based on Cerium Molybdate and Multi-Walled Carbon Nanotubes

“…Furthermore, the cerium present in the unit cell can assume different oxidation states, positively influencing the energy density, charge–discharge time, and (photo)electrochemical reactivity [ 21 ]. These features also justify the increasing use of this material in the construction of sensors [ 21 , 22 ], catalysts [ 23 , 24 , 25 ], energy conversion devices [ 26 , 27 ], batteries [ 26 , 28 ], and capacitors [ 29 ], among other emerging technologies.…”