Ce (III)-terephthalic acid metal-organic frameworks as highly efficient ·OH radical scavengers for fuel cells and investigation of its antioxidation mechanism

Xu, Kangwei; Pei, Supeng; Zhang, Wei; Han, Zhitao; Guan, Panpan; Wang, Li; Zou, Yecheng; Ding, Han; Ma, Xiao‐Jun; Xu, Cai-Di; Liu, Feng; Zhang, Yongming

doi:10.1016/j.mtener.2022.101195

Cited by 11 publications

(12 citation statements)

References 41 publications

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“…The CeO 2 @Ph-PEI-based PEMs showed outstanding performance in terms of OCV decay rate compared to previously reported work (Fig. 4e), [10,18,19,22,23,42,[47][48][49][50][51][52][53][54][55][56][57] illustrating that CeO 2 @Ph-PEI is an antioxidant with promising applications.…”

Section: Insight Into the Functioning Mechanism Of Ceo 2 @Ph-peimentioning

confidence: 52%

Phosphate-grafted polyethyleneimine-induced multifunctional cerium oxide as an antioxidant for simultaneously enhancing the proton conductivity and durability of proton exchange membranes

Zhao,

Liao,

Wang

et al. 2024

Preprint

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Free radical attack on Proton exchange membranes (PEM) is detrimental to the long-term durability of proton exchange membrane fuel cells (PEMFCs), and although state-of-the-art cerium-based antioxidants defend against free radical attack, potentially impairing the proton conductivity of PEM limits their more comprehensive application. To break the "trade-off" between the durability and proton conductivity of PEM, a functionalized cerium oxide (CeO2@Ph-PEI) composite with a synergistic enhancement of durability and proton conductivity has been synthesized induced by phosphate-grafted polyethyleneimine (Ph-PEI). Owing to the strong adsorption of phosphate groups on transition metal hydroxides/oxides, Ph-PEI was firmly anchored on the particle surface during the transition from sol-gel to oxide, which suppressed the further aggregation of CeO2 nanoparticles and thus retained abundant active sites for free radical scavenging. Moreover, due to the extra proton transport sites in the anchored Ph-PEI functional shells, the hybrid membrane fabricated with CeO2@Ph-PEI as the antioxidant additive exhibited a high proton conductivity up to 0.242 S cm− 1, which was approximately 1.32 times higher than that of the unmodified CeO2-based hybrid membrane. Consequently, CeO2@Ph-PEI-based PEMs exhibited an OCV decay rate of 0.32 mV h− 1, a maximum power density of 1.19 W cm− 2, an H2 crossover value of 2.12 mA cm− 2, and thickness retention (93.7%) after 200 hours of accelerated degradation testing. This strategy synergistically improves the proton conductivity of PEMs and the lifetime of PEMFCs through CeO2 functionalization, providing a promising solution for next-generation fuel cell-based energy storage techniques.

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Section: Insight Into the Functioning Mechanism Of Ceo 2 @Ph-peimentioning

confidence: 52%

Phosphate-grafted polyethyleneimine-induced multifunctional cerium oxide as an antioxidant for simultaneously enhancing the proton conductivity and durability of proton exchange membranes

Zhao,

Liao,

Wang

et al. 2024

Preprint

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“…In addition, an absorption peak attributed to the symmetric stretching vibrations of the –SO 3 H group in the pristine PFSA membrane was observed at 1058 cm −1 . 4 In contrast, the peak positions of the PFSA/TM-CeO 2 (0.5, 1, 1.5 wt%) composite membranes were not appreciably changed, while that of the PFSA/TM-CeO 2 (2 wt%) composite membrane was slightly shifted to a lower wavenumber. This phenomenon was related to the presence of Ce 3+ or Ce 4+ ions on the CeO 2 surface that formed ionic bonds with –SO 3 H groups.…”

Section: Resultsmentioning

confidence: 85%

“…The characteristic peaks of each sample at 982 cm −1 and 969 cm −1 were ascribed to the C–O bonds. 4 A shoulder peak because of the vibration of C–C bonds was observed at 1311 cm −1 . 2 The peaks at 1687 cm −1 , 1210 cm −1 , 1148 cm −1 , 634 cm −1 and 514 cm −1 were due to the vibration of C–F.…”

Section: Resultsmentioning

confidence: 98%

“…As a promising clean energy technology, proton exchange membrane fuel cells (PEMFCs) have the advantages of high efficiency, low pollution, and low operating temperatures. [1][2][3][4][5][6][7][8] In the past several years, novel primary power sources based on PEMFCs have been widely used in automotive and portable devices. [9][10][11][12][13][14] Proton exchange membranes (PEMs) are a crucial component of PEMFCs because they provide channels for proton transport and separate anode fuel and cathode gases.…”

Section: Introductionmentioning

confidence: 99%

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CeO₂ stabilized by tourmaline as a novel inorganic filler to simultaneously increase the conductivity and durability of proton exchange membranes

Pei¹,

Xu²,

Xu³

et al. 2023

Inorg. Chem. Front.

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“…Additionally, a noticeable decrease in the degradation efficiency (22%) following the use of t -BuOH suggests the active participation of • OH as well. Terephthalic acid (TA), a widely used probe for the identification of • OH radicals, was employed to monitor the generation of • OH from H 2 O 2 in order to further confirm the function of • OH in the dye degradation. , It is widely recognized that TA rapidly interacts with • OH to produce TAOH (Figure S32), a luminous compound that emits light at a wavelength of 430 nm (λ em ). This can be easily detected using traditional fluorescence spectroscopy …”

Section: Resultsmentioning

confidence: 99%

Sodium Alginate–CdS Nanostructures: Reinforcing Chemoselectivity in Nitro-Organic Reduction and Dye Degradation through Photoinduced Electron Transfer

Dhruv,

Kori,

Das

2024

ACS Appl. Nano Mater.

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In the current socioeconomic environment, researchers are interested in using visible light for the exploration of chemical reactions. In this context, biopolymer-supported multifunctional metal sulfide composites with improved catalytic performance play a crucial role in chemical reactions. To address this issue, sodium alginate-templated cadmium sulfide-based photocatalysts are synthesized at a gel−liquid interface by altering the pH of the Na 2 S solution from 7.4 to 10 and 13. The X-ray diffractograms (XRDs) of the synthesized sodium alginate− cadmium sulfide (SA−CdS) illustrated the semicrystalline nature of the cadmium nanostructures. Field emission scanning electron microscopy (FE-SEM) is used to examine the surface morphology of the nanocomposites. The transmission electron microscopy (TEM) analysis reveals that the sodium alginate−cadmium sulfide (SA−CdS) particles exhibit spherical shapes with an average size of 4 nm. The diffuse reflectance spectroscopy (DRS) and Brunauer−Emmett−Teller (BET) analysis reveal the low band gap (∼2.4 eV) and enhanced surface area for SA−CdS synthesized at pH 13 of Na 2 S solution compared to pH 10 and 7.4, respectively. In contrast to the reported photocatalysts, the synthesized SA−CdS not only reduced the nitro-organic compounds under incoming irradiation but also reduced the chemoselectively deteriorated nitro compounds having vinyl functional groups. Additionally, the SA−CdS photocatalyst efficiently degraded organic rhodamine B (RhB) dye under visible light irradiation. Additionally, the essential function of electrons in reducing nitroaryl compounds is revealed, and a potential photocatalytic reaction mechanism using ammonium formate as a hole scavenger is also proposed. The synthesized SA−CdS catalyst demonstrates remarkable recyclability without any noticeable decrease in the amount of product obtained. These findings suggest that the developed SA−CdS catalyst has the potential to serve as a promising visible-light-driven photocatalyst for various organic reactions.

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Ce (III)-terephthalic acid metal-organic frameworks as highly efficient ·OH radical scavengers for fuel cells and investigation of its antioxidation mechanism

Cited by 11 publications

References 41 publications

Phosphate-grafted polyethyleneimine-induced multifunctional cerium oxide as an antioxidant for simultaneously enhancing the proton conductivity and durability of proton exchange membranes

Phosphate-grafted polyethyleneimine-induced multifunctional cerium oxide as an antioxidant for simultaneously enhancing the proton conductivity and durability of proton exchange membranes

CeO₂ stabilized by tourmaline as a novel inorganic filler to simultaneously increase the conductivity and durability of proton exchange membranes

Sodium Alginate–CdS Nanostructures: Reinforcing Chemoselectivity in Nitro-Organic Reduction and Dye Degradation through Photoinduced Electron Transfer

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Ce (III)-terephthalic acid metal-organic frameworks as highly efficient ·OH radical scavengers for fuel cells and investigation of its antioxidation mechanism

Cited by 11 publications

References 41 publications

Phosphate-grafted polyethyleneimine-induced multifunctional cerium oxide as an antioxidant for simultaneously enhancing the proton conductivity and durability of proton exchange membranes

Phosphate-grafted polyethyleneimine-induced multifunctional cerium oxide as an antioxidant for simultaneously enhancing the proton conductivity and durability of proton exchange membranes

CeO2 stabilized by tourmaline as a novel inorganic filler to simultaneously increase the conductivity and durability of proton exchange membranes

Sodium Alginate–CdS Nanostructures: Reinforcing Chemoselectivity in Nitro-Organic Reduction and Dye Degradation through Photoinduced Electron Transfer

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CeO₂ stabilized by tourmaline as a novel inorganic filler to simultaneously increase the conductivity and durability of proton exchange membranes