Highly conductive, methanol resistant fuel cell membranes fabricated by layer-by-layer self-assembly of inorganic heteropolyacid

Zhao, Chengji; Lin, Haidan; Cui, Zhiming; Li, Xianfeng; Na, Hui; Wang, Xing

doi:10.1016/j.jpowsour.2009.05.021

Cited by 63 publications

(22 citation statements)

References 33 publications

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“…The aqueous solutions of PTA exhibited one characteristic peak at 249 nm which can be ascribed to the oxygen-totungsten charge transfer transitions of PTA. 38 In comparison, two maximum absorption peaks at 292 and 472 nm were observed in the spectrum of (PTA/RuL) 12 film, which are similar to those of RuL aqueous solution, which implies that the absorption of PTA was very weak compared to that of the Ru(II) complex, and was obscured by that of the RuL in the multilayer film. It is noteworthy that the all the absorption bands was red-shifted by ∼10 nm relative to the absorption peak of RuL aqueous solution, due most probably to charge transfer between PTA and RuL.…”

Section: Ultraviolet-visible Absorption Spectramentioning

confidence: 87%

Preparation, Characterization, and Photoelectric Properties of an Electrostatically Self-Assembled Film Based on Tungstophosphoric Acid and a Binuclear Ru(II) Complex

Yu²,

Lin³

et al. 2011

J. Nanosci. Nanotech.

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An electrostatically self-assembled film based on tungstophosphoric acid (PTA) and a binuclear Ru(II) complex RuL was prepared and characterized by UV-vis absorption spectroscopy and cyclic voltammetry. A linear increase in the UV-vis absorbance with the number of deposited layers indicated that the film deposition was uniform and reproducible. The cyclic voltammogram demonstrated that PTA and the binuclear Ru(II) complex assembled in the film were redox active with surface confined characteristics. The photoelectrochemical properties and mechanism of photocurrent generation have also been studied. A five-layer (PTA/RuL)5 film on the ITO was found to exhibit a large cathodic photocurrent density of 5.32 microA/cm2 while irradiated with polychromatic light (730 nm > lambda > 325 nm) at an applied potential of -0.3 V versus saturated calomel electrode. The photocurrent action spectrum was in agreement with metal-to-ligand charge-transfer (MLCT) band of RuL in the absorption spectrum, which indicated that the photocurrent was generated based on MLCT excitation of the RuL in the film. It is noteworthy that the incident monochromatic photon-to-current conversion efficiency was calculated to be 1.1% at a wavelength of 450 nm.

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Section: Ultraviolet-visible Absorption Spectramentioning

confidence: 87%

Preparation, Characterization, and Photoelectric Properties of an Electrostatically Self-Assembled Film Based on Tungstophosphoric Acid and a Binuclear Ru(II) Complex

Yu²,

Lin³

et al. 2011

J. Nanosci. Nanotech.

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“…In recent years, the fabrication of ultrathin polymeric films on solid substrate surfaces with nanometer-control over their properties has received considerable interest due to their potential and/or demonstrated applications such as microcapsules, 1,2 macroscopic sacs, 3 sensitive solar cell films, 4,5 biosensors, 6,7 fuel cell, 8 and separation membranes. [9][10][11][12] Among the film fabrication technique established so far, layer-bylayer (LbL) assembly is a versatile method by the alternate immersion of substrates into interactive polymer solutions.…”

Section: Introductionmentioning

confidence: 99%

Dynamic pressure‐driven covalent assembly of inner skin hollow fiber multilayer membrane

Zhang

Dai

2010

AIChE Journal

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A covalent assembly was accomplished onto hollow fibers via a dynamic pressuredriven layer-by-layer (LbL) technique. The covalent crosslinking multilayers were successfully formed onto the inner surfaces of hollow fiber porous substrates during the alternatively filtration of polyethyleneimine (PEI) and glutaraldehyde (GA) solutions. The formation of covalent bond between PEI and GA was confirmed using fourier transform infrared (FTIR) spectra. The thickness increment on a quartz slide clearly suggested the stepwise growth of multilayer at nanometer scale. The regular alternation of zeta potentials demonstrated that the successful formation of GA-crosslinked PEI multilayers on the hollow fibers. The multilayer membranes showed excellent pervaporation performances for the dehydration of different solvent-water mixtures. The selectivity and permeability can be controlled by varying the PEI layer number. More importantly, the covalent assembled multilayer membrane rendered much higher stabilities compared with those from electrostatically LbL assembly, which offers much opportunity for practical applications.

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“…The methanol concentration in the water reservoir was determined using a Shimadzu GC-8A chromatograph. The methanol diffusion coefficients of the membranes at 25 C and 60 C [28] were calculated using the following formula:…”

Section: Methanol Permeabilitymentioning

confidence: 99%

Synthesis and properties of a novel sulfonated poly(arylene ether ketone sulfone) membrane with a high β-value for direct methanol fuel cell applications

Xu¹,

Ma²,

Han³

et al. 2014

Electrochimica Acta

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Highly conductive, methanol resistant fuel cell membranes fabricated by layer-by-layer self-assembly of inorganic heteropolyacid

Cited by 63 publications

References 33 publications

Preparation, Characterization, and Photoelectric Properties of an Electrostatically Self-Assembled Film Based on Tungstophosphoric Acid and a Binuclear Ru(II) Complex

Preparation, Characterization, and Photoelectric Properties of an Electrostatically Self-Assembled Film Based on Tungstophosphoric Acid and a Binuclear Ru(II) Complex

Dynamic pressure‐driven covalent assembly of inner skin hollow fiber multilayer membrane

Synthesis and properties of a novel sulfonated poly(arylene ether ketone sulfone) membrane with a high β-value for direct methanol fuel cell applications

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