Electrochemical properties of Pt/graphene intercalated by carbon black and its application in polymer electrolyte membrane fuel cell

Cho, S.H.; Yang, Haoran; Lee, D.C.; Park, S.H.; Kim, W.J.

doi:10.1016/j.jpowsour.2012.10.040

Cited by 55 publications

(24 citation statements)

References 27 publications

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“…The peaks at 72.0 eV (Pt 4f 7/2 ) and 75.3 eV (Pt 4f 5/2 ) correspond to Pt 2+ , and the peaks located at 76.3 eV and 77.9 eV correspond to Pt 4+ . The principal Pt 4f 7/2 and 4f 5/2 peaks were slightly shifted to binding energies lower than the commonly accepted binding energies of Pt 4f 7/2 and 4f 5/2 , perhaps due to electron transfer from the SiNW/C to the Pt NPs [31].…”

Section: 12000mentioning

confidence: 67%

SiNW/C@Pt Arrays for High-Efficiency Counter Electrodes in Dye-Sensitized Solar Cells

et al. 2019

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Modern energy needs and the pressing issue of environmental sustainability have driven many research groups to focus on energy-generation devices made from novel nanomaterials. We have prepared platinum nanoparticle-decorated silicon nanowire/carbon core–shell nanomaterials (SiNW/C@Pt). The processing steps are relatively simple, including wet chemical etching to form the silicon nanowires (SiNWs), chemical vapor deposition to form the carbon shell, and drop-casting and thermal treatment to embed platinum nanoparticles (Pt NPs). This nanomaterial was then tested as the counter electrode (CE) in dye-sensitized solar cells (DSSCs). SiNW/C@Pt shows potential as a good electrocatalyst based on material characterization data from Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). Raman spectroscopy shows that the surface reactivity of the SiNW/C is increased by the decoration of Pt NPs. These data also show that the carbon shell included both graphitic (sp 2 hybridization) and defective (sp 3 hybridization) phases of carbon. We achieved the minimum charge-transfer resistance of 0.025 Ω · cm 2 and the maximum efficiency of 9.46% with a symmetric dummy cell and DSSC device fabricated from the SiNW/C@Pt CEs, respectively.

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Section: 12000mentioning

confidence: 67%

SiNW/C@Pt Arrays for High-Efficiency Counter Electrodes in Dye-Sensitized Solar Cells

et al. 2019

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“…GO, the intermediate material of graphene was synthesized by a modified Hummer's method [38][39][40] using graphite powder as the starting material. 4 g of graphite powder (E-NanoTech.…”

Section: Synthesis Of Gomentioning

confidence: 99%

Self-humidifying Pt–graphene/SiO2 composite membrane for polymer electrolyte membrane fuel cell

Lee

Yang

Park

et al. 2015

Journal of Membrane Science

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“…In other studies, it was reported that using a carbon black spacer between graphene flakes prevents the sheets from restacking and also increases the Pt utilization. 23,24,29 Utilizing other types of spacer that could cause development in mass transfer and also increase the interaction between the Pt particles, and the support, are metal oxide materials, such as WO3-Nanowires. 30 In addition to those efforts focusing on improving the structure and performance of carbon support materials, methods that are used to deposit metallic catalyst particles must be properly chosen to have a well-distributed sub-nano sized particles on the support surface with higher electrochemical and thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Platinum nanoparticles decorated carbon nanofiber hybrids as highly active electrocatalysts for polymer electrolyte membrane fuel cells

et al. 2020

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Increasing the efficiency of electrocatalyst is the key demand for the polymer electrolyte membrane fuel cells (PEMFC). To address the activity and performance challenges of commercial electrocatalyst, Pt/C, we introduce a new hybrid catalyst support for Pt nanoparticles. In this regard, combining or mixing specific type of carbon-based supports is a feasible strategy to increase catalyst utilization and performance. In the current study, Pt nanoparticles (NPs) were decorated on a new hybrid network, comprising of carbon nanofiber (CNF) and carbon black (CB), by means of a facile and efficient microwave (MW) assisted reduction method. All synthesized electrocatalysts were characterized to elucidate chemical and morphological structures. Then, the hybrid electrocatalysts were utilized as hydrogen oxidation reaction (HOR) and oxygen reduction reaction (ORR) electrocatalysts and their electrocatalytic activities were investigated by using cyclic voltammetry (CV) and linear sweep voltammetry (LSV), respectively. We found that the hybridization of CNF with CB substantially improved not only the electrocatalytic activity but also the fuel cell performance, which can be attributed to a consecutive conductive network, in which CB acts as a spacer, and synergistic effects between the CNF and CB. The hybrid electrocatalyst (Pt/CNF-CB with 50:50 wt%) showed a superior activity toward HOR and ORR while also offering exceptional fuel cell performance. That hybrid possessed the highest electrochemically active surface area (ECSA) compared with Pt/CNF and Pt/CB. In addition, the mass activity (at 0.80 V vs RHE) of the Pt/CNF-CB (50:50 wt%) is about 3.3 and 3.5 times higher than that of Pt/CNF and Pt/CB, respectively. Furthermore, that hybrid electrocatalyst exhibited enhanced fuel cell performance with 907 mW. cm −1 maximum power density. This work demonstrated that the CNF-CB supported Pt nanoparticles as electrocatalysts are extremely promising for fuel cell reactions.

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Electrochemical properties of Pt/graphene intercalated by carbon black and its application in polymer electrolyte membrane fuel cell

Cited by 55 publications

References 27 publications

SiNW/C@Pt Arrays for High-Efficiency Counter Electrodes in Dye-Sensitized Solar Cells

SiNW/C@Pt Arrays for High-Efficiency Counter Electrodes in Dye-Sensitized Solar Cells

Self-humidifying Pt–graphene/SiO2 composite membrane for polymer electrolyte membrane fuel cell

Platinum nanoparticles decorated carbon nanofiber hybrids as highly active electrocatalysts for polymer electrolyte membrane fuel cells

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