Conductive Polymer/Graphene Supported Platinum Nanoparticles as Anode Catalysts for the Extended Power Generation of Microbial Fuel Cells

kumar, G. Gnana; Kirubaharan, C. Joseph; Udhayakumar, S; Karthikeyan, Chandrasekaran; Nahm, Kee Suk

doi:10.1021/ie502399y

Cited by 125 publications

(29 citation statements)

References 74 publications

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“…A similar trend was observed in the EIS results (SI Figure S8), in which the charge transfer resistance, characterized by the diameter of the semicircle [12,44], was 5 Ω for Pt/C and ~ 10 Ω for N-G@CoNi/BCNT, while those for Co and Ni were noticeably higher. Because the three-electrode cell was purged with air in the headspace, the early occurrence of Warburg impedance could be attributed to the low oxygen concentration in the PBS solution.…”

Section: Electrochemical Analysissupporting

confidence: 84%

Nitrogen-doped graphene/CoNi alloy encased within bamboo-like carbon nanotube hybrids as cathode catalysts in microbial fuel cells

Hou

Yuan

Wen

et al. 2016

Journal of Power Sources

129

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Cost-effective catalysts are of key importance to the successful deployment of microbial fuel cells (MFCs) for electricity generation from organic wastes. Herein, a novel catalyst prepared by one-step synthesis strategy is reported. The catalyst features N-doped bamboo-like carbon nanotube (BCNT) in which CoNi-alloy is encapsulated at the end and/or the middle section of the tube with many graphene layers inside inner cavities of BCNT (N-G@CoNi/BCNT). The prepared N-G@CoNi/BCNT exhibits a high oxygen reduction reaction (ORR) activity with an early onset potential of 0.06 V vs. Ag/AgCl and a comparable exchange current density to that of commercial Pt/C. The excellent catalytic activity is further evidenced by a high electron transfer number of 3.63. When being applied in MFCs, the N-G@CoNi/BCNT yields an average current density of 6.7 A m −2 , slightly lower than that of Pt/C but with a less mass transfer potential loss. The cost of the N-G@CoNi/BCNT for constructing a 1-m 2 cathode is 200 times lower than that of Pt/C. With such a competitive price and excellent electrocatalytic-activity resulting from its unique morphology, CoNi-alloy/nitrogen dopants, considerable surface area, and carbon-coated alloy/graphene hybridization, the present catalyst is a promising candidate for ORR catalysts in MFCs for energy recovery from wastes.

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Section: Electrochemical Analysissupporting

confidence: 84%

Nitrogen-doped graphene/CoNi alloy encased within bamboo-like carbon nanotube hybrids as cathode catalysts in microbial fuel cells

Hou

Yuan

Wen

et al. 2016

Journal of Power Sources

129

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“…The retention of the peak top current was ≈70% after 10 000 cycles for mAC/PANI‐UF/CB and mmAC/PANI‐UF/CB, whereas mmAC/PANI‐UF/GR exhibited excellent retention after 10 000 cycles, indicating that the transferred PANI‐UFs have practical cycle lifetimes for electronic devices. The excellent durability of the transferred PANI‐UFs is based on the strong π–π stacking interaction between the carbon surface and the PANI‐UFs . This is in good agreement with the fact that the PANI‐UFs were not transferred onto the stainless steel because stainless steel does not have π electrons.…”

Section: Resultsmentioning

confidence: 99%

Templated Synthesis of Ultrafine Polyaniline Fibers and Their Transfer to Carbon Substrates for Highly Rapid Redox Reactions

Itoi

Shimomura

Hasegawa

et al. 2019

Adv Materials Inter

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desired application. Among these structures, polyaniline nanofibers (PANI-NFs) have been studied for applications in electronics, [4] electrochemical capacitors, [5] sensors, [2b,6] and artificial tissues (e.g., muscles). [7] PANI-NFs are synthesized via the electrochemical or chemical polymerization of aniline (ANI), [5b,8] and they are characterized by very thin structures, a large surface area per unit mass of PANI, and superior electrochemical properties. Because the counterion diffusion into the PANI chains plays a crucial role during their redox reactions, [3a] their fine structure enables fast redox reactions because of the shortened diffusion pathway for the counterions, thus yielding high power densities for electrochemical capacitors and rapid redox responses for sensors. Various synthetic routes have been developed to prepare a variety of PANI-NFs for appropriate purposes. However, they often require complicated or multistep synthetic procedures using organic solvents and chemicals and show relatively low reproducibility owing to their fine structure.Recently, we reported the polymerization of ANI exclusively inside the pores of activated carbon (AC) for use as high-performance electrochemical capacitor electrodes. [9] The polymerization of ANI can be achieved by using AC with micropores (≈2 nm) [9a] and that with both micro-and mesopores (≈4 nm). [9b] Transmission electron microscopy (TEM) observation and X-ray photoelectron spectroscopy (XPS) analysis of the resulting materials revealed that there were little PANIs on the particle surface of the AC. The size of the resulting PANIs is restricted by the pores of the AC; therefore, the morphology is restrained to be ultrafine fibers with high structural reproducibility. PANI ultrafine fibers (PANI-UFs) have huge contact areas with the conductive carbon surfaces, and charge transfer at the interface is facilitated, resulting in a high power density that is suitable for use in electrochemical capacitor electrodes. In our subsequent work, we found that the PANI-UFs can be transferred from AC/PANI-UF composite materials to conductive carbon substrates under an applied potential, i.e., the AC functions as a template. The transferred PANI-UFs also Polyaniline ultrafine fibers (PANI-UFs) prepared using commercial activated carbon (AC) as a template are transferred to conductive carbon substrates. This method starts with the adsorption of aniline in AC, followed by its subsequent electrochemical polymerization to produce PANI-UFs inside the AC pores. The resulting PANI-UFs can be transferred onto carbon substrates under an applied potential. In this study, two kinds of AC with different pore sizes (≈2 and ≈4 nm) are used, and carbon black, graphite rods, highly oriented pyrolytic graphite, and stainless steel are examined as conductive substrates. It is found that the transfer of PANI-UFs fails only in the case of stainless steel. The transfer of PANI-UFs cannot be confirmed by transmission electron microscopy observation because of their ultrafine str...

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“…Furthermore, the rGO/PANI/Pt composite coated on carbon cloth (rGO/PANI/Pt/CC) shows much lower charge transfer resistance than the bare CC, rGO/CC, rGO/PANI/CC, and rGO/Pt/CC composites, probably because of the synergistic interactions among the three components, thus resulting in an increased number of electron conduction channels and catalytically active sites. The rGO/PANI/Pt hybrids also show a large MFC power density and long concrete life durability …”

Section: Applications Of Polymer/graphene Hybrids In Energy Conversionmentioning

confidence: 99%

“…The rGO/PANI/Pt hybrids also show al arge MFC power density and long concrete life durability. [64] Apart from metals nanoparticles, alloyed nanoparticles can also act as active componentsing raphene/polymer hybrid systems. Dutta and Ouyang [65] have reported an ovel polymer-sta- bilized graphene decorated with alloy nanoparticles for the ethanol oxidation reaction( EOR).…”

Section: Fuel Cellsmentioning

confidence: 99%

Polymer/Graphene Hybrids for Advanced Energy‐Conversion and ‐Storage Materials

Cui

Gao

et al. 2016

Chemistry An Asian Journal

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Polymer/graphene-based materials with interesting physical and chemical properties have been attracting considerable attention and have been shown to have great potential as active materials in the field of energy conversion and storage. In this review, we focus on recent significant advances in the fabrication and application of polymer/graphene hybrids as electrocatalysts and electrode materials. Synthetic strategies and application of these materials in energy conversion and storage are presented, particularly in devices such as fuel cells, actuators, and supercapacitors, accompanied with a discussion of the challenges and research directions necessary for the future development of polymer/graphene hybrids.

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Conductive Polymer/Graphene Supported Platinum Nanoparticles as Anode Catalysts for the Extended Power Generation of Microbial Fuel Cells

Cited by 125 publications

References 74 publications

Nitrogen-doped graphene/CoNi alloy encased within bamboo-like carbon nanotube hybrids as cathode catalysts in microbial fuel cells

Nitrogen-doped graphene/CoNi alloy encased within bamboo-like carbon nanotube hybrids as cathode catalysts in microbial fuel cells

Templated Synthesis of Ultrafine Polyaniline Fibers and Their Transfer to Carbon Substrates for Highly Rapid Redox Reactions

Polymer/Graphene Hybrids for Advanced Energy‐Conversion and ‐Storage Materials

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