XPS O 1s binding energies for polymers containing hydroxyl, ether, ketone and ester groups

López, Gabriel P.; Castner, David G.; Ratner, Buddy D.

doi:10.1002/sia.740170508

Cited by 597 publications

(381 citation statements)

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“…In addition, the oxygen to silicon ratio of 2.3 is also indicative of the formation of SiO 2 . A few factors could contribute to the excessive amount of oxygen: (1) according to the CasaXPS manual 2.3.15 Rev 1.2 [44] and other reported work [45,46], XPS atomic composition measurement has a scatter/error of about 10%; (2) the excessive amount of oxygen was likely to include a small amount of oxygen bound to carbon, possibly picked up during the sample transfer in air, and (3) the coating may also contain OH − groups and other low molecular weight alkyl silicate oligomers. It ought to be noted that these OH − groups, once formed, are difficult to remove [47] and may adversely affect battery performance because of its reactivity towards lithium metal [48].…”

Section: Resultsmentioning

confidence: 99%

Nano SiO2 particle formation and deposition on polypropylene separators for lithium-ion batteries

Fu¹,

Luan²,

Argue³

et al. 2012

Journal of Power Sources

199

125

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. b s t r a c tThe novelty of this work is the formation and deposition of SiO 2 , as opposed to deposition using commercially available SiO 2 powder suspension in the solution, to form ceramic coating on polypropylene (PP) separators for lithium-ion battery. The formation of SiO 2 nanoparticles with uniform particle size is accomplished through direct hydrolysis of tetraethyl orthosilicate (TEOS), while the deposition of the formed SiO 2 on PP separators was conducted in the same solution containing polyvinylidene fluoridehexafluoropropylene (PVDF-HFP) as binders and acetone as the solvent. The effects of the ceramic coating on the surface morphology, tensile strength, contact angles, electrolyte uptake, thermal shrinkage of the PP separators and the cell performances such as battery rate capability and Coulombic efficiency were investigated. The coated separators show significant reduction in thermal shrinkage and improvement in tensile strength, contact angles, electrolyte uptake and battery performance as compared to the plain PP separator. Crown

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Section: Resultsmentioning

confidence: 99%

Nano SiO2 particle formation and deposition on polypropylene separators for lithium-ion batteries

Fu¹,

Luan²,

Argue³

et al. 2012

Journal of Power Sources

199

125

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“…The C 1s spectrum of the Au/TiO 2 catalysts is dominated by C-H/C-C species at BE  284.8 eV resulting from contamination of the surface by hydrocarbons (adventitious carbon). The minor components at 286.4 eV and 288.9 eV correspond to C-O and OC-O species, respectively [14]. The position of the Ti 2p 3/2 , O 1s and C 1s peaks did not change after using the catalysts in the reaction of CO oxidation.…”

Section: mentioning

confidence: 88%

XPS/ToF-SIMS Characterization of TiO$_{2}$ Supported Au Nanoparticles: Effect of Catalytic CO Oxidation

Chenakin¹,

Kruse²,

Vasylyev³

et al. 2016

Metallofiz. Noveishie Tekhnol.

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X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) are employed for a comparative study of the surface composition and electronic structure of an Au/TiO 2 catalyst in the asprepared state and after using it in the reaction of CO oxidation at room temperature. As found, the reaction-induced changes in the morphology of Au nanoparticles related to their agglomeration are accompanied by modification of the electronic state of the catalyst via an enhanced electron transfer to the gold atoms that shows up as an additional negative shift of the Au 4f spectrum and its distortion. The catalytic reaction of CO oxidation results in the loss of hydroxyl groups and accumulation on the support surface of various carbon-containing species with the leading formation of carbonate and bicarbonate groups, which increases with time on stream. The role of these factors in deactivation of the catalyst is discussed.За допомогою рентґенівської фотоелектронної спектроскопії (РФЕС) та часопролітної вторинно-іонної мас-спектрометрії (ЧП-ВІМС) проведено порівняльне дослідження складу поверхні й електронної структури ката-лізатора Au/TiO 2 у свіжоприготованому стані та після його використання у реакції окиснення CO за кімнатної температури. Встановлено, що інду-ковані каталітичною реакцією зміни у морфології наночастинок Au, які спричинені їхньою аґломерацією, супроводжувалися модифікуванням електронного стану каталізатора завдяки посиленому перенесенню елек-тронів на атоми золота, що проявлялося як додатковий неґативний зсув РФЕ-спектра Au 4f і його спотворення. Каталітична реакція окиснення CO призводила до втрати гідроксильних груп та накопичення на поверхні підкладки різних вуглецевмісних функціональних груп з переважним С помощью рентгеновской фотоэлектронной спектроскопии (РФЭС) и времяпролётной вторично-ионной масс-спектрометрии (ВП-ВИМС) про-ведено сравнительное исследование состава поверхности и электронной структуры катализатора Au/TiO 2 в свежеприготовленном состоянии и по-сле его использования в реакции окисления CO при комнатной темпера-туре. Установлено, что индуцированные каталитической реакцией изме-нения в морфологии наночастиц Au, вызванные их агломерацией, сопро-вождались модификацией электронного состояния катализатора путём усиленного переноса электронов на атомы золота, что проявлялось в виде дополнительного отрицательного сдвига РФЭ-спектра Au 4f и его иска-жения. Каталитическая реакция окисления CO приводила к потере гид-роксильных групп и накоплению на поверхности подложки различных углеродсодержащих функциональных групп с преимущественным фор-мированием карбонатов и бикарбонатов, которое усиливалось с течением времени реакции. Обсуждается роль этих факторов в деактивации ката-лизатора.

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“…intrinsic conducting or semiconducting behavior of the samples). For these reasons, the number of peaks used to fit C 1s XPS spectra of carbon based materials can vary considerably (Biniak et al 1997;Blume et al 2015;Chen et al 2008;Jeong et al 2008;Langley et al 2006;Lopez et al 1991;Smith et al 2016). An additional source of incomprehension is the choice of the photon source that affects the observed line shapes.…”

Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 99%

Activated carbons for applications in catalysis: the point of view of a physical-chemist

Lazzarini

2017

Rend. Fis. Acc. Lincei

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This paper is a concise review on the principal physical-chemical techniques available to investigate the structural and surface properties of activated carbons (ACs) for catalytic applications. The same activated carbon has been characterized by an incredible amount of techniques: Solid State-Nuclear Magnetic Resonance, X-Ray Powder Diffraction and Raman spectroscopy for structural characterization, X-ray Photoelectron Spectroscopy, Inelastic Neutron Scattering and FT-IR spectroscopy for surface analysis, instead. The main goal is to discuss the advantages and disadvantages of all the techniques and to propose a multi-technique approach that should help in avoiding misinterpretations, as often found in the specialized literature.

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XPS O 1s binding energies for polymers containing hydroxyl, ether, ketone and ester groups

Cited by 597 publications

References 16 publications

Nano SiO2 particle formation and deposition on polypropylene separators for lithium-ion batteries

Nano SiO2 particle formation and deposition on polypropylene separators for lithium-ion batteries

XPS/ToF-SIMS Characterization of TiO$_{2}$ Supported Au Nanoparticles: Effect of Catalytic CO Oxidation

Activated carbons for applications in catalysis: the point of view of a physical-chemist

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