Cathodic deposition of molybdenum and vanadium mixed oxyhydroxide films from V-substituted polymolybdophosphate

Nakayama, Masaharu; Komatsu, Hiroyuki; Ozuka, Shotaro; Ogura, Kotaro

doi:10.1016/j.electacta.2005.04.025

Cited by 12 publications

(4 citation statements)

References 21 publications

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“…The precursors used for deposition are usually aqueous solutions of molybdates, [83] iso-/peroxo-polymolybdates, [84] ammonium paramolybdates, [85] polymolybdophosphates. [86] The nature and composition of the deposited film are closely related to the bath composition, pH, and the applied potential. [24c, 26, 83a, 84, 85, 87] The complex Mo VI solution chemistry with simultaneous existence of different equilibria complicates the process.…”

Section: Cathodic Electrodepositionmentioning

confidence: 99%

Molybdenum, Molybdenum Oxides, and their Electrochemistry

2012

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The electrochemical behaviors of molybdenum and its oxides, both in bulk and thin film dimensions, are critical because of their widespread applications in steels, electrocatalysts, electrochromic materials, batteries, sensors, and solar cells. An important area of current interest is electrodeposited CIGS-based solar cells where a molybdenum/glass electrode forms the back contact. Surprisingly, the basic electrochemistry of molybdenum and its oxides has not been reviewed with due attention. In this Review, we assess the scattered information. The potential and pH dependent active, passive, and transpassive behaviors of molybdenum in aqueous media are explained. The major surface oxide species observed, reversible redox transitions of the surface oxides, pseudocapacitance and catalytic reduction are discussed along with carefully conducted experimental results on a typical molybdenum glass back contact employed in CIGS-based solar cells. The applications of molybdenum oxides and the electrodeposition of molybdenum are briefly reviewed.

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Section: Cathodic Electrodepositionmentioning

confidence: 99%

Molybdenum, Molybdenum Oxides, and their Electrochemistry

2012

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“…The precursors are usually MoO 4 2− [9,13], iso-and peroxo-polymolybdate [14,15], polymolybdophosphate [16] aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of the electrochemical deposition of molybdenum oxides thin films on copper and platinum

Bănică

Barvinschi

Vaszilcsin

et al. 2009

Journal of Alloys and Compounds

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“…The electronic bands of the d-d transition characteristic for metal cations coordinated by a monolacunary polyoxometalate ligand, L , can be found in the VIS spectra. Only d-d transition bands of Co 2+ , Ni 2+ , and Cu 2+ can be determined in the VIS spectra because intense bands of Mn 2+ and Fe 3+ ions are covered by bands of L [ 35 ]. Solutions of monolacunary L and its complexes 1–5 have an orange colour and exhibit a very intensive band in VIS at 468 nm/21,370 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

“…IR, Raman, and UV spectra revealed that K n [MPVW 10 O 39 (H 2 O)]·xH 2 O complexes have higher stability and symmetry than monolacunary K 8 [PVW 10 O 39 ]·15H 2 O after coordination of a transition metal cation [ 28 , 29 , 35 ]. The VIS data of polyoxometalate complexes revealed that Co 2+ , Ni 2+ , and Cu 2+ cations were coordinated in an octahedral ligand field, and coordination was performed with oxygen atoms.…”

Section: Discussionmentioning

confidence: 99%

Synthesis and Characterisation of Monolacunary Keggin Monovanado-deca-tungstophosphate and Its Complexes with Transition Metal Cations

et al. 2023

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Five new complexes with metal cations (Mn2+, Fe3+, Co2+, Ni2+, and Cu2+) of monolacunary Keggin monovanado-deca-tungstophosphate, K8[PVW10O39]·15H2O, have been synthesised. The molar ratio of the combination between metal cations and K8[PVW10O39]·15H2O has been established to be 1:1, and its general molecular formulas were found to be: Kn[MPVW10O39(H2O)]·xH2O (n = 5 for M = Fe3+ and n = 6 for M = Mn2+, Co2+, Ni2+, and Cu2+). Optimal conditions for complexes’ synthesis (pH, temperature, and reaction time) have been determined. The characterisation of K8[PVW10O39]·15H2O and of its compounds Kn[MPVW10O39(H2O)]·xH2O have been performed using AAS, TG-DTA-DTG, UV-VIS, IR, Raman, and powder XRD methods. In UV spectra, two maximums of absorption were obtained, at 200 and 250 nm, characteristic of Keggin polycondensate compounds. The coordination of cations Ni2+, Co2+, and Cu2+ through oxygen atoms from K8[PVW10O39]·15H2O in an octahedron system has been reflected with VIS spectroscopy. All these methods have proved the compositions and structures of K8[PVW10O39]·15H2O and Kn[MPVW10O39(H2O)]·xH2O, their similarity with other vanadotungstophosphates, and their achievements in the Keggin class. Additionally, all analysis methods have shown an increase in the degree of structural symmetry and the thermal stability of a polyoxoanion complex after attaching metal cations compared to the monolacunary, K8[PVW10O39]·15H2O.

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Cathodic deposition of molybdenum and vanadium mixed oxyhydroxide films from V-substituted polymolybdophosphate

Cited by 12 publications

References 21 publications

Molybdenum, Molybdenum Oxides, and their Electrochemistry

Molybdenum, Molybdenum Oxides, and their Electrochemistry

A comparative study of the electrochemical deposition of molybdenum oxides thin films on copper and platinum

Synthesis and Characterisation of Monolacunary Keggin Monovanado-deca-tungstophosphate and Its Complexes with Transition Metal Cations

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