Porous an hollow nanofibers for solid oxide fuel cell electrodes

Ahn, Minwoo; Hwang, Sangyeon; Han, Sung-Ho; Choi, Mingi; Byun, Doyoung

doi:10.1007/s11814-020-0610-6

Cited by 7 publications

(11 citation statements)

References 53 publications

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“…Moreover, through electrochemical evaluations, the loading amounts of actual catalysts and EBFC performance capabilities using the catalysts were evaluated. According to the evaluations, sprGO could immobilize two times more GOx than rGO, and even during EBFC performance test, EBFC using sprGO/[TTF-GOx (10)]/crosslinked-gelatin showed an excelelnt MDP of 337 μW/cm 2 , which was superior by 1.25 times to EBFC using rGO/[TTF-GOx (10)]/ crosslinked-gelatin. These results mean that our research to improve the performance of EBFC by immobilizing the considerable amount of enzyme was successfully carried out.…”

Section: Discussionmentioning

confidence: 99%

“…The performance outcomes of EBFCs using sprGO/[TTF-GOx]/crosslinked-gelatin are evaluated by measuring their polarization curves (Figure 6). For these tests, two catalysts (CNT/[TTF-GOx (10)]/crosslinked-gelatin, rGO/[TTF-GOx (10)]/crosslinked-gelatin) with identical amounts of GOx (10 mg/mL) were prepared as control catalysts, while as the actual experimental groups, sprGO/[TTF-GOx (10)]/ crosslinked-gelatin and sprGO/[TTF-GOx (20)]/ crosslinked-gelatin samples prepared with the optimized GOx concentration (20 mg/mL), were used.…”

Section: The Performance Evaluation Of Ebfcs Using the Corresponding ...mentioning

confidence: 99%

“…In Figure 6, under identical GOx concentration condition, EBFC using sprGO/[TTF-GOx (10)]/crosslinkedgelatin showed the best maximum power density (MPD) (337 μW/cm 2 ), while the MPD of EBFC using CNT/[TTF-GOx (10)]/crosslinked-gelatin, which has higher resistance than rGO/[TTF-GOx ( 10)]/crosslinked-gelatin, was second (314 μW/cm 2 ), and EBFC using rGO/[TTF-GOx ( 10)]/crosslinked-gelatin, with the lowest amount of immobilized GOx due to its small specific surface area, showed the lowest performance (269 μW/cm 2 ). In addition, EBFC using sprGO/[TTF-GOx ( 20)]/crosslinkedgelatin prepared by immobilizing more GOx molecules showed the highest power density (380 μW/cm 2 ).…”

Section: The Performance Evaluation Of Ebfcs Using the Corresponding ...mentioning

confidence: 99%

“…7,8 In general fuel cells, noble metal catalysts are used to promote the energy conversion process, with a separator that is placed between anode and cathode electrodes to mitigate mixed potential and self-discharge problems. [9][10][11][12] Different from the general fuel cells, in EBFCs, some enzymes, such as glucose oxidase (GOx), can be continuously cultured, implying that catalysts containing the enzymes can be fabricated without production limit. In addition, they have excellent glucose selectivity even when used with mixed substrates owing to their superior substrate specificity.…”

Section: Introductionmentioning

confidence: 99%

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Maximizing the enzyme immobilization of enzymatic glucose biofuel cells through hierarchically structured reduced graphene oxide

Lee

Hyun

Park

et al. 2021

Intl J of Energy Research

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The number of immobilized glucose oxidase (GOx) molecules is considerably increased by the structural modification of reduced graphene oxide (rGO), and the performance of enzymatic biofuel cells (EBFCs) is positively affected by the modification process. To do this, new rGO with three-dimensional open porous structure is formed by spray freeze drying method (sprGO), while tetrathiafulvalene (TTF) as mediator, and GOx are sequentially immobilized onto sprGO. To improve the loading amount of catalyst, rGO structure is modified to open porous sprGO structure possessing numerous anchoring sites, after which gelatin film crosslinked by glutaraldehyde is fabricated onto sprGO to prevent any losses of other components (sprGO/[TTF-GOx]/crosslinked-gelatin). Specific surface area and charge transfer resistance of sprGO are quantitatively measured, and the actual amount of immobilized GOx and the performance of EBFC using this catalyst are electrochemically examined. With this, it is found that the amount of GOx immobilized in sprGO/[TTF-GOx]/

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Section: Discussionmentioning

confidence: 99%

Section: The Performance Evaluation Of Ebfcs Using the Corresponding ...mentioning

confidence: 99%

Section: The Performance Evaluation Of Ebfcs Using the Corresponding ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Maximizing the enzyme immobilization of enzymatic glucose biofuel cells through hierarchically structured reduced graphene oxide

Lee

Hyun

Park

et al. 2021

Intl J of Energy Research

View full text Add to dashboard Cite

show abstract

“…24 Porous organic polymers (POPs), which are formed via covalent bonding following the principles of reticular chemistry, offer large surface areas, tunable pore structures, controllable microstructures with low population densities, high thermal and chemical stabilities, and facile scale-up via convenient onestep processing. Due to these attractive properties, POPs have been actively studied for various applications, including catalysis, 25 energy storage, 26,27 biosensors and nanocarriers, 28 photon conductors, 29 and molecular separation. [30][31][32][33][34][35] However, relatively few studies have been done for the capture of PPCPs using POPs.…”

Section: Introductionmentioning

confidence: 99%