Noble‐free oxygen reduction reaction catalyst supported on Sengon wood (
            <i>Paraserianthes falcataria L.</i>
            ) derived reduced graphene oxide for fuel cell application

Sudarsono, Wulandhari; Wong, Wai Yin; Loh, Kee Shyuan; Majlan, Edy Herianto; Syarif, Nirwan; Kok, Kuan Ying; Yunus, Rozan Mohamad; Lim, Kean Long

doi:10.1002/er.5015

Cited by 22 publications

(15 citation statements)

References 63 publications

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“…To date, incorporating metal sites into graphene-based materials is considered an effective strategy to further improve the catalytic performance toward ORR [30][31][32][33][34][35] . In biological systems, copper centers (Cu 2+ ), such as those present in cytochrome c oxidase and laccase, can bind molecular oxygen and efficiently reduce it to water.…”

Section: Introductionmentioning

confidence: 99%

Facilely synthesized nitrogen-doped reduced graphene oxide functionalized with copper ions as electrocatalyst for oxygen reduction

Garino¹,

Zeng²,

Castellino³

et al. 2021

npj 2D Mater Appl

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Nitrogen-doped reduced graphene oxide is successfully synthesized and functionalized with hydroxylated copper ions via one-pot microwave-assisted route. The presence of cationic Cu coordinated to the graphene layer is fully elucidated through a set of experimental characterizations and theoretical calculations. Thanks to the presence of these hydroxyl-coordinated Cu2+ active sites, the proposed material shows good electrocatalytic performance for the oxygen reduction reaction, as evidenced by an electron transfer number of almost 4 and by high onset and half-wave potentials of 0.91 V and 0.78 V vs. the reversible hydrogen electrode, respectively. In addition, the N-doped Cu-functionalized graphene displays a superior current retention with respect to a commercial Pt/C catalyst during the stability test, implying its potential implementation in high-performance fuel cells and metal-air batteries.

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Section: Introductionmentioning

confidence: 99%

Facilely synthesized nitrogen-doped reduced graphene oxide functionalized with copper ions as electrocatalyst for oxygen reduction

Garino¹,

Zeng²,

Castellino³

et al. 2021

npj 2D Mater Appl

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“…[26][27][28][29][30] In a few reports, POMs with carbonaceous materials have been shown to be effective for ORR [31][32][33][34][35] ; while in others, several new noble-metal free composites have been studied. 6,[36][37][38][39][40][41][42] However, still the use of POM based composites as a noble-metal free electrocatalysts particularly for ORR needs to be explored.…”

Section: Introductionmentioning

confidence: 99%

“…Thus there is a severe need to develop an efficient and stable electrocatalyst, which could be able to reduce oxygen, at a potential as close as possible to the thermodynamic value (ie, 1.23 V vs RHE). Tremendous efforts have been taken in this direction, and various low Pt content or Pt free catalysts such as alloys of Pt with different transition metals, 3,4 materials consisting of non‐noble metal 5,6 and/or metal‐free 7‐9 composites have been explored widely for their activity toward ORR. The ORR reaction follows either four‐electron or two‐electron transfer pathway in alkaline condition as follows,

O_{2} + {2H}_{2} normalO + {4e}^{-} \to {4OH}^{-}

O_{2} + H_{2} normalO + {2e}^{-} \to {HO}_{2}^{-} + {OH}^{-}

{HO}_{2}^{-} + H_{2} normalO + {2e}^{-} \to {3HO}^{-}

…”

Section: Introductionmentioning

confidence: 99%

Microwave‐assisted synthesis of cobalt‐polyoxometalate @carbon black nanocomposites and their electrocatalytic ability toward oxygen reduction reaction

et al. 2020

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Improving the stability and efficiency of non-noble metal based ORR (oxygen reduction reaction) electrocatalyst is crucial for the commercialization of fuel cell technology. Here, we report the synthesis of cobalt-polyoxometalate nanocomposite with carbon (CoP@C) by greener strategy, which shows an interesting enhancement in the kinetics of oxygen electroreduction process. The CoP@C nanocomposite exhibited improved catalytic activity toward ORR with E onset 1.00 V vs RHE and current density of 4.2 mA/cm 2 at 1600 rpm in alkaline condition. Further, CoP@C electrocatalyst showed a single step 4 electron transfer pathway, high tolerance to methanol, and exhibited superior stability compared with 20 wt% Pt/C. Thus, CoP@C could be a cheaper and potential candidate for ORR electrocatalysis in fuel cells. The superiority of the catalyst in terms of activity and durability arises due to the uniform distribution of cobalt-polyoxometalate nanoclusters on carbon surface and the synergetic effect of POM, cobalt, and carbon.

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“…So, a drastic increase in the application of PEMFC is observed in the past decade. However, most of the researchers focus on materials' characterization 2,14‐22 and the effects of operation parameters on cell performance 11,12,23‐28 . Components of a PEMFC include bipolar plates (BP), gas diffusion layers (GDL), microporous layers (MPL), catalyst layers (CL), and a proton‐exchange membrane.…”

Section: Introductionmentioning

confidence: 99%

Effects of assembling method and force on the performance of proton‐exchange membrane fuel cells with metal foam flow field

et al. 2020

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Recently, highly porous metal foams have been used to replace the traditional open-flow channels to improve gas transport and distribution in the cells. Deformation of flow plate, gas diffusion layer (GDL), and metal foam may occur during assembling. When the cell size is small, the deformation may not be significant. For large area cells, the deformation may become significant to affect the cell performance. In this study, an assembling device that is capable of applying uniform clamping force is built to facilitate fuel cell assembling and alleviate the deformation. A compressing plate that is the same size of the active area is used to apply uniform clamping force before surrounding bolts are fastened. Therefore, bending of the flow plate and deformation of GDL and metal foam can be minimized. Effects of the clamping force on the microstructures of GDL and metal foam, various resistances, pressure drops, and cell performance are investigated. Distribution of the contact pressure between metal foam and GDL is measured by using pressure sensitive films. Field-emission scanning electron microscope is used to observe the microstructures. Electrochemical impedance spectroscopy analysis is used measure resistances. The fuel cell performance is measured by using a fuel cell test system. For the cell design used in this study, the optimum clamping force is found to be 200 kgf. Using this optimum clamping force, the cell performance can be enhanced by 50%, as compared with that of the cell assembled without using clamping plates. With appropriate clamping force, the compression force distribution across the entire cell area can approach uniform. This enables uniform flow distribution and reduces mass transfer resistance. Good contact between GDL and metal foam also lowers the interface resistance. All these factors contribute to the enhanced cell performance.

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Noble‐free oxygen reduction reaction catalyst supported on Sengon wood ( Paraserianthes falcataria L. ) derived reduced graphene oxide for fuel cell application

Cited by 22 publications

References 63 publications

Facilely synthesized nitrogen-doped reduced graphene oxide functionalized with copper ions as electrocatalyst for oxygen reduction

Facilely synthesized nitrogen-doped reduced graphene oxide functionalized with copper ions as electrocatalyst for oxygen reduction

Microwave‐assisted synthesis of cobalt‐polyoxometalate @carbon black nanocomposites and their electrocatalytic ability toward oxygen reduction reaction

Effects of assembling method and force on the performance of proton‐exchange membrane fuel cells with metal foam flow field

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