1
                                                 H and                          
                        93
                                                 Nb Solid-State NMR and IR Study of Acidity of Nanodisperse Nb                         
                        2
                                                 O                         
                        5
                                                 ·nH                         
                        2
                                                 O

I. V. Yakovlev; E. Papulovskiy; E. A. Paukshtis; V. M. Bondareva; A. V. Toktarev; V. I. Zaikovskii; O. B. Lapina

doi:10.1007/s00723-019-01118-8

¹ H and ⁹³ Nb Solid-State NMR and IR Study of Acidity of Nanodisperse Nb ₂ O ₅ ·nH ₂ O

I. V. Yakovlev, E. Papulovskiy, E. A. Paukshtis, V. M. Bondareva, A. V. Toktarev, V. I. Zaikovskii, O. B. Lapina

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Niobium oxide hydrate is a promising material for various heterogeneous catalytic processes due to its strong acidity and stability in aqueous medium. While different synthesis conditions may lead to various particle morphologies, the effect of morphology of Nb ₂ O ₅ ·nH ₂ O particles on their acidic properties is not fully understood yet. In this paper, we have successfully synthesized and characterized nanodisperse niobium oxide hydrate. Using infrared (IR) spectroscopy, we demonstrated that the sample exhibits strong Brønsted acidity close in strength to sulfuric acid. Furthermore, solid-state nuclear magnetic resonance (NMR) spectroscopy in combination with ab initio calculations gave additional insight into the nature of strong acidic sites and proved to be a useful tool for identification of acidic sites in Nb ₂ O ₅ ·nH ₂ O systems. Thus, we have shown that it is not necessary to follow difficult high-temperature solid-state processes or processes with ammonia, which often contaminates the material, to synthesize highly acidic nanodisperse Nb ₂ O ₅ ·nH ₂ O.

Original language	English
Pages (from-to)	589-597
Number of pages	9
Journal	Applied Magnetic Resonance
Volume	50
Issue number	4
DOIs	https://doi.org/10.1007/s00723-019-01118-8
Publication status	Published - 1 Apr 2019

Keywords

GENERALIZED GRADIENT APPROXIMATION
NIOBIC ACID
BRONSTED ACID
NANOSHEETS
CATALYSTS
SURFACES

Access to Document

10.1007/s00723-019-01118-8

Cite this

Yakovlev, I. V., Papulovskiy, E., Paukshtis, E. A., Bondareva, V. M., Toktarev, A. V., Zaikovskii, V. I., & Lapina, O. B. (2019). ¹ H and ⁹³ Nb Solid-State NMR and IR Study of Acidity of Nanodisperse Nb ₂ O ₅ ·nH ₂ O. Applied Magnetic Resonance, 50(4), 589-597. https://doi.org/10.1007/s00723-019-01118-8

Yakovlev, I. V. ; Papulovskiy, E. ; Paukshtis, E. A. ; Bondareva, V. M. ; Toktarev, A. V. ; Zaikovskii, V. I. ; Lapina, O. B. / ¹ H and ⁹³ Nb Solid-State NMR and IR Study of Acidity of Nanodisperse Nb ₂ O ₅ ·nH ₂ O. In: Applied Magnetic Resonance. 2019 ; Vol. 50, No. 4. pp. 589-597.

@article{2267595da63f4b2ea7bd690343369d6f,

title = "1 H and 93 Nb Solid-State NMR and IR Study of Acidity of Nanodisperse Nb 2 O 5 ·nH 2 O",

abstract = " Niobium oxide hydrate is a promising material for various heterogeneous catalytic processes due to its strong acidity and stability in aqueous medium. While different synthesis conditions may lead to various particle morphologies, the effect of morphology of Nb 2 O 5 ·nH 2 O particles on their acidic properties is not fully understood yet. In this paper, we have successfully synthesized and characterized nanodisperse niobium oxide hydrate. Using infrared (IR) spectroscopy, we demonstrated that the sample exhibits strong Br{\o}nsted acidity close in strength to sulfuric acid. Furthermore, solid-state nuclear magnetic resonance (NMR) spectroscopy in combination with ab initio calculations gave additional insight into the nature of strong acidic sites and proved to be a useful tool for identification of acidic sites in Nb 2 O 5 ·nH 2 O systems. Thus, we have shown that it is not necessary to follow difficult high-temperature solid-state processes or processes with ammonia, which often contaminates the material, to synthesize highly acidic nanodisperse Nb 2 O 5 ·nH 2 O. ",

keywords = "GENERALIZED GRADIENT APPROXIMATION, NIOBIC ACID, BRONSTED ACID, NANOSHEETS, CATALYSTS, SURFACES",

author = "Yakovlev, {I. V.} and E. Papulovskiy and Paukshtis, {E. A.} and Bondareva, {V. M.} and Toktarev, {A. V.} and Zaikovskii, {V. I.} and Lapina, {O. B.}",

year = "2019",

month = apr,

day = "1",

doi = "10.1007/s00723-019-01118-8",

language = "English",

volume = "50",

pages = "589--597",

journal = "Applied Magnetic Resonance",

issn = "0937-9347",

publisher = "Springer-Verlag GmbH and Co. KG",

number = "4",

}

Yakovlev, IV, Papulovskiy, E, Paukshtis, EA, Bondareva, VM, Toktarev, AV, Zaikovskii, VI & Lapina, OB 2019, '¹ H and ⁹³ Nb Solid-State NMR and IR Study of Acidity of Nanodisperse Nb ₂ O ₅ ·nH ₂ O', Applied Magnetic Resonance, vol. 50, no. 4, pp. 589-597. https://doi.org/10.1007/s00723-019-01118-8

¹ H and ⁹³ Nb Solid-State NMR and IR Study of Acidity of Nanodisperse Nb ₂ O ₅ ·nH ₂ O. / Yakovlev, I. V.; Papulovskiy, E.; Paukshtis, E. A.; Bondareva, V. M.; Toktarev, A. V.; Zaikovskii, V. I.; Lapina, O. B.

In: Applied Magnetic Resonance, Vol. 50, No. 4, 01.04.2019, p. 589-597.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - 1 H and 93 Nb Solid-State NMR and IR Study of Acidity of Nanodisperse Nb 2 O 5 ·nH 2 O

AU - Yakovlev, I. V.

AU - Papulovskiy, E.

AU - Paukshtis, E. A.

AU - Bondareva, V. M.

AU - Toktarev, A. V.

AU - Zaikovskii, V. I.

AU - Lapina, O. B.

PY - 2019/4/1

Y1 - 2019/4/1

N2 - Niobium oxide hydrate is a promising material for various heterogeneous catalytic processes due to its strong acidity and stability in aqueous medium. While different synthesis conditions may lead to various particle morphologies, the effect of morphology of Nb 2 O 5 ·nH 2 O particles on their acidic properties is not fully understood yet. In this paper, we have successfully synthesized and characterized nanodisperse niobium oxide hydrate. Using infrared (IR) spectroscopy, we demonstrated that the sample exhibits strong Brønsted acidity close in strength to sulfuric acid. Furthermore, solid-state nuclear magnetic resonance (NMR) spectroscopy in combination with ab initio calculations gave additional insight into the nature of strong acidic sites and proved to be a useful tool for identification of acidic sites in Nb 2 O 5 ·nH 2 O systems. Thus, we have shown that it is not necessary to follow difficult high-temperature solid-state processes or processes with ammonia, which often contaminates the material, to synthesize highly acidic nanodisperse Nb 2 O 5 ·nH 2 O.

AB - Niobium oxide hydrate is a promising material for various heterogeneous catalytic processes due to its strong acidity and stability in aqueous medium. While different synthesis conditions may lead to various particle morphologies, the effect of morphology of Nb 2 O 5 ·nH 2 O particles on their acidic properties is not fully understood yet. In this paper, we have successfully synthesized and characterized nanodisperse niobium oxide hydrate. Using infrared (IR) spectroscopy, we demonstrated that the sample exhibits strong Brønsted acidity close in strength to sulfuric acid. Furthermore, solid-state nuclear magnetic resonance (NMR) spectroscopy in combination with ab initio calculations gave additional insight into the nature of strong acidic sites and proved to be a useful tool for identification of acidic sites in Nb 2 O 5 ·nH 2 O systems. Thus, we have shown that it is not necessary to follow difficult high-temperature solid-state processes or processes with ammonia, which often contaminates the material, to synthesize highly acidic nanodisperse Nb 2 O 5 ·nH 2 O.

KW - GENERALIZED GRADIENT APPROXIMATION

KW - NIOBIC ACID

KW - BRONSTED ACID

KW - NANOSHEETS

KW - CATALYSTS

KW - SURFACES

UR - http://www.scopus.com/inward/record.url?scp=85062569660&partnerID=8YFLogxK

U2 - 10.1007/s00723-019-01118-8

DO - 10.1007/s00723-019-01118-8

M3 - Article

AN - SCOPUS:85062569660

VL - 50

SP - 589

EP - 597

JO - Applied Magnetic Resonance

JF - Applied Magnetic Resonance

SN - 0937-9347

IS - 4

ER -

Yakovlev IV, Papulovskiy E, Paukshtis EA, Bondareva VM, Toktarev AV, Zaikovskii VI et al. ¹ H and ⁹³ Nb Solid-State NMR and IR Study of Acidity of Nanodisperse Nb ₂ O ₅ ·nH ₂ O. Applied Magnetic Resonance. 2019 Apr 1;50(4):589-597. https://doi.org/10.1007/s00723-019-01118-8

¹ H and ⁹³ Nb Solid-State NMR and IR Study of Acidity of Nanodisperse Nb ₂ O ₅ ·nH ₂ O

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this