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15-Copper(ii)-containing 36-tungsto-4-silicates(iv) [Cu15O2(OH)(10)X(A--SiW9O34)(4)](25-) (X = Cl, Br): synthesis, structure, magnetic properties, and electrocatalytic CO2 reduction
Bassil, BS; Haider, A; Ibrahim, M; Mougharbel, AS; Bhattacharya, S; Christian, JH; Bindra, JK; Dalal, NS; Wang, M; Zhang, GJ; Keita, B; Rutkowska, IA; Kulesza, PJ; Kortz, U; Bassil, Bassem S.; Haider, Ali; Ibrahim, Masooma; Mougharbel, Ali S.; Bhattacharya, Saurav; Christian, Jonathan H.; Bindra, Jasleen K.; Dalal, Naresh S.; Wang, Meng; Zhang, Guangjin; Keita, Bineta; Rutkowska, Iwona A.; Kulesza, Pawel J.; Kortz, Ulrich
2018
Source PublicationDALTON TRANSACTIONS
ISSN1477-9226
Volume47Issue:35Pages:12439
Abstract

The 15-copper(ii)-containing 36-tungsto-4-silicates [Cu15O2(OH)(10)X(A--SiW9O34)(4)](25-) (X = Cl, 1; Br, 2) have been prepared in 70% yield by reaction of the trilacunary 9-tungstosilicate precursor [A--SiW9O34](10-) with Cu2+ ions in aqueous pH 8 medium. Both polyanions 1 and 2 were isolated as hydrated mixed potassium/sodium salts and characterized in the solid state by FT-IR, TGA, single-crystal XRD, and elemental analysis. DC magnetic susceptibility measurements from 1.8-300 K established the ground state to be paramagnetic with a magnetic moment corresponding to 15 uncoupled Cu2+ (S = 1/2) ions. EPR measurements and simulations were consistent with this analysis. Electrochemical studies were performed for polyanions 1 and 2 dissolved in solution to elucidate the electroactivity of both copper and tungstate sites. Using 2 as a representative example, the electrocatalytic activity towards CO2 reduction upon deposition on a glassy carbon electrode surface, while retaining selectivity relative to hydrogen evolution, was demonstrated.

KeywordTransition-metal Clusters Electron-paramagnetic-resonance Single-crystal Electrodes Carbon-dioxide Electrochemical Reduction Cu-ii Hydrothermal Conditions Dimeric Polyoxoanions Silicotungstic Acid Copper Electrodes
SubtypeArticle
DOI10.1039/c8dt01896k
WOS IDWOS:000444400200043
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/26720
Collection中国科学院过程工程研究所
Recommended Citation
GB/T 7714
Bassil, BS,Haider, A,Ibrahim, M,et al. 15-Copper(ii)-containing 36-tungsto-4-silicates(iv) [Cu15O2(OH)(10)X(A--SiW9O34)(4)](25-) (X = Cl, Br): synthesis, structure, magnetic properties, and electrocatalytic CO2 reduction[J]. DALTON TRANSACTIONS,2018,47(35):12439.
APA Bassil, BS.,Haider, A.,Ibrahim, M.,Mougharbel, AS.,Bhattacharya, S.,...&Kortz, Ulrich.(2018).15-Copper(ii)-containing 36-tungsto-4-silicates(iv) [Cu15O2(OH)(10)X(A--SiW9O34)(4)](25-) (X = Cl, Br): synthesis, structure, magnetic properties, and electrocatalytic CO2 reduction.DALTON TRANSACTIONS,47(35),12439.
MLA Bassil, BS,et al."15-Copper(ii)-containing 36-tungsto-4-silicates(iv) [Cu15O2(OH)(10)X(A--SiW9O34)(4)](25-) (X = Cl, Br): synthesis, structure, magnetic properties, and electrocatalytic CO2 reduction".DALTON TRANSACTIONS 47.35(2018):12439.
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