TY - JOUR
T1 - Changes in the spectroelectrochemical properties of copper(II) hexacyanoferrate(III) during electrochemical insertion of alkaline ions
AU - Cáceres, Gustavo
AU - Rojas, Víctor
AU - López, Silvana
AU - HENRIQUEZ NAVIA, RODRIGO GONZALO
AU - GREZ MORENO, PAULA CAROLINA
AU - Schrebler, Ricardo
AU - Herrera, Francisco
AU - Pereyra, C. Javier
AU - Marotti, Ricardo E.
AU - Navarrete, Emilio
AU - MUÑOZ CARTAGENA, EDUARDO CARLO
N1 - Funding Information:
We acknowledge the financial support from FONDECYT, Chile (grant no. 1180784), and from VRIEA-PUCV (grant no. 039.438 NÚCLEO-PUCV and 125.728/2018 DII-PUCV). E. Navarrete thank for the financial support from postdoctoral project FONDECYT (N° 3200216). G. Cáceres, V. Rojas, and S. López would like to acknowledge the kind support from his doctoral scholarship by ANID. CJP and REM are grateful to PEDECIBA—Física Uruguay, ANII (Agencia Nacional de Investigación e Innovación) Project FCE_1_2014_1_104739, and CSIC (Comisión Sectorial de Investigación Científica) of the Universidad de la República.
Publisher Copyright:
© 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2021
Y1 - 2021
N2 - In this work, the influence of the electrochemical insertion of different alkali ions, e.g., lithium, sodium, and potassium, on the electrochromic properties of copper(II) hexacyanoferrate(III) (CuHCF) was addressed. CuHCF was electrochemically synthesized on FTO substrates, and a nucleation and growth analysis was shown that follows a 3D progressive nucleation with diffusion-controlled growth, which was confirmed by SEM analysis. The spectroelectrochemical study demonstrated that spectral changes were centered into three regions: a green band (506 nm) associated with a charge transfer (FeIII → CuII), a violet band (413 nm) associated with d-d orbital transition for Cu+2 ions, and an ultraviolet band (354 nm) associated with a ligand-metal charge transfer (CN-→ FeIII). This electronic transfer, along with the calculated electrochromic efficiency averages, indicates a relationship between the ionic radius of insertion ions and the deformation generated in CuHCF. An increase in the ionic radius decreases the interatomic charge transfer, which produces a low electrochromic efficiency.
AB - In this work, the influence of the electrochemical insertion of different alkali ions, e.g., lithium, sodium, and potassium, on the electrochromic properties of copper(II) hexacyanoferrate(III) (CuHCF) was addressed. CuHCF was electrochemically synthesized on FTO substrates, and a nucleation and growth analysis was shown that follows a 3D progressive nucleation with diffusion-controlled growth, which was confirmed by SEM analysis. The spectroelectrochemical study demonstrated that spectral changes were centered into three regions: a green band (506 nm) associated with a charge transfer (FeIII → CuII), a violet band (413 nm) associated with d-d orbital transition for Cu+2 ions, and an ultraviolet band (354 nm) associated with a ligand-metal charge transfer (CN-→ FeIII). This electronic transfer, along with the calculated electrochromic efficiency averages, indicates a relationship between the ionic radius of insertion ions and the deformation generated in CuHCF. An increase in the ionic radius decreases the interatomic charge transfer, which produces a low electrochromic efficiency.
KW - Alkaline ions insertion
KW - Copper hexacyanoferrate
KW - Electrochromism
KW - Spectroelectrochemistry
UR - http://www.scopus.com/inward/record.url?scp=85105402389&partnerID=8YFLogxK
U2 - 10.1007/s10008-021-04960-8
DO - 10.1007/s10008-021-04960-8
M3 - Article
AN - SCOPUS:85105402389
JO - Journal of Solid State Electrochemistry
JF - Journal of Solid State Electrochemistry
SN - 1432-8488
ER -