Facile potentiostatic preparation of functionalized polyterthiophene-anchored graphene oxide as a metal-free electrocatalyst for the oxygen reduction reaction

Naveen, M.; Noh, Hui-Bog; Hossain, Md. Shahriar A.; Kim, Jung Ho; Shim, Yoon‐Bo

doi:10.1039/c4ta06774f

Cited by 36 publications

(19 citation statements)

References 37 publications

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“…In the last decade, conducting polymers (CPs) have gained immense interest for use in various applications due to their wide range of properties and their low cost . Although CPs, such as polyaniline, polypyrrole, polythiophene, and polyterthiophene have been the subject of many investigations for various applications, no reports using a conducting polymer bearing functional groups that practically stabilize the catalytic metals by strong adhesion to the polymer layer have appeared before the present study.…”

Section: Introductionmentioning

confidence: 91%

Dealloyed AuNi Dendrite Anchored on a Functionalized Conducting Polymer for Improved Catalytic Oxygen Reduction and Hydrogen Peroxide Sensing in Living Cells

Naveen

Gurudatt

Noh

et al. 2016

Adv Funct Materials

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Dealloyed‐AuNi dendrite anchored on carboxylic acid groups of a conducting polymer is prepared and demonstrated for the catalysis of the oxygen reduction reaction (ORR) and detection of hydrogen peroxide (H2O2) released from living cells. The dendrite formation is initiated on a poly(benzoic acid‐2,2′:5′,2′′‐terthiophene) (pTBA) layer, where the polymer layer acts as a stable substrate to improve the long‐term stability and catalytic activity of the alloy electrode. A co‐deposition of Au and Ni is performed to produce a Ni‐rich Au surface at first; subsequent removal of the surface Ni atoms through electrochemical dealloying enhances the performance of the catalyst because of an increase in the electrochemically active area by 12 times. The hydrodynamic voltammetry of dealloyed‐AuNi@pTBA shows a half‐wave potential at –0.08 V, which is a large shift towards more positive potential when compared to those on AuNi@pTBA (−0.14 V) and commercial Pt/C (–0.12 V) electrodes. The proposed catalytic electrode achieved a superior analytical performance for the detection of trace H2O2 (at –0.15 V) released from cancer and normal cells with a very low detection limit (ca. 5 nM). In addition, the in vitro studies suggest no significant cytotoxicity effect for the dealloyed sample and the viability of the cells are more than 85% even after 48 h of incubation.

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Section: Introductionmentioning

confidence: 91%

Dealloyed AuNi Dendrite Anchored on a Functionalized Conducting Polymer for Improved Catalytic Oxygen Reduction and Hydrogen Peroxide Sensing in Living Cells

Naveen

Gurudatt

Noh

et al. 2016

Adv Funct Materials

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“…The resulting terthiophene grafted to GO was used subsequently as monomer to promote the electrochemical polymerization of the terthiophene monomer anchored on GO (Scheme 34). [126] Although the performance of polymerized poly(terthiophene) anchored GO was better than that of poly-(terthiophene), reduced GO and other control materials it was still worse than that of Pt as electrode since poly(terthiophene)-rGO still needs ah igher overpotential. However,p oly-(terthiophene) anchored on GO has highers tability and lower tendency to deactivate in the presenceo fm ethanolt han Pt.…”

Section: E Lectrochemical Applicationsmentioning

confidence: 99%

“…Oxygen reduction reaction (ORR) in organic molecules covalently attached to Gs. poly(terthiophene)-GO [126] terthiophene covalently anchored to GO through ring opening epoxide and,then, electropolymerized the hybrid exhibits both higher stability and tolerance to fuel cross-over than commercial Pt/C electrodes Cu-triazole-pyridine complex-rGO [127] phenyl alkyne covalently attached to rGO via diazonization (80 8C, overnight) and further treatedi nt he presenceo fc opper and triazole precursor (50 8C, 36 h) Cu-complex covalently anchoredtor GO enhances the selectivity of 4e À vs. 2e À reduction of O 2 achieved with CNTs Co-bipyridine-rGO [128] 4-amino-2,2'-bipyridinec ovalently grafted to GO by diazonium route. Then, reduction of GO and deposition onto the ITO electrode and final metalation increased electrocatalytic activity for ORR afterinertizationu ndesirableC o-carboxylates by Zn 2 + Fe-tetramino-Pc-rGO [129] Fe-tetramino-Pcc ovalently anchored to rGO via oxalamide method the hybrid exhibits higher stability and methanoltolerancethan aPt/C catalyst for ORR in alkaline media Covalentlyb onded polyaniline and p-phenylenediamine-GO [130] electrochromic device by spin-coating of the polymero napolyethylene terephthalate/indium tin oxides (PET/ITO)s ubstrate electrochromicm aterial with low electricalr esistance…”

Section: Large Excess Of Catalyst Respect To Substratementioning

confidence: 99%

“…[53,162,164,224] In view of the above comments, it is not surprising that there have been some reports describing the use of covalently modified Gs as electrocatalysts with the aim of comparing their performance with that of Pt electrodes, particularly for ORR. Ac ouple of examples have synthesized conducting polymers such as poly(terthiophene) [126] or poly(1,5-diaminoanthraquinone) [227] covalently graftedo nr GO and determined their good performancef or the ORR. In one of these examples, an amino substituted terthiophene has been anchored to GO, mainlyb yr eaction with the ring epoxide functional groupso f GO by reaction with terthiophene monomers present in solution.…”

Section: E Lectrochemical Applicationsmentioning

confidence: 99%

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Covalently Modified Graphenes in Catalysis, Electrocatalysis and Photoresponsive Materials

Navalón

Herance

Álvaro

et al. 2017

Chemistry A European J

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The ideal graphene is a one-atom thick single layer of carbon atoms having sp hybridation in hexagonal arrangement. Due to their large surface area and good dispersability in common solvents, graphenes are suitable platforms to anchor covalently units. The appended unit can introduce additional functionality to graphene. Although the field of covalently modified graphene is still starting compared to the development of other carbon nanoforms, there is already many examples describing the use of modified graphenes as recoverable photo-, electrocatalysts as well as in non-linear optics and to improve mechanical resistance and solubility of graphenes. In this Review, the state of the art of covalently modified graphenes for these applications is reviewed. After some general sections describing properties and characterization techniques of graphenes relevant to their use as supports and those general reactions and starting substrates to obtain the modified graphene conjugates, the main body of the review describes the preparation and properties of covalently modified graphene depending on their use as catalyst, photocatalyst, photoresponsive material, non-linear optics, electrocatalyst and other uses. The last section of the review summarizes the main achievements of the field and what should be according to our view the future developments.

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“…Shim et al electrochemically polymerized aminopyrimidyl-functionalized terthiophene monomer in the presence of graphene oxide, forming a modified PTh/graphene oxide composite as nonmetal catalysts for ORR. [40] The aminopyrimidyl-functionalized PTh was anchored onto graphene oxide through a opening reaction of the epoxide group on GO with the amino group on aminopyrimidyl. Importantly, the imine (CN) active sites on aminopyrimidyl increased the electrocatalytic activity of PTh/ graphene oxide composite.…”

Section: Nonmetal Heteroatom Doping and Subsequent Carbonizationmentioning

confidence: 99%

Conducting‐Polymer‐Based Materials for Electrochemical Energy Conversion and Storage

Wang

Kong

et al. 2017

Advanced Materials

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and poly(3,4-ethylenedioxythiophene) (PEDOT). The highly conjugated polymer chains can be reversibly assigned electrochemical properties by a doping/dedoping process. [9][10][11] By regulating and controlling the level of doping, their conductivities can be tuned in a wide range, from 10 −10 to 10 4 S cm, spanning the entire range from insulators to semiconductors, to conductors. [12,13] Additionally, these conducting polymers retain the advantages of traditional polymers, such as low cost, convenient preparation, good affinity to many other materials, and high flexibility and durability. Recently, great efforts have been made to exploit the applications of conducting polymers as electrocatalysts for fuel cells and as electrode materials for supercapacitors. Considering the rapidly booming efforts undertaken in this cutting-edge research area, it is necessary to highlight the new discoveries and achievements in the past several years. Here, we introduce the latest advances in conducting-polymer-based materials for fuel cells and supercapacitors, and focus on the strategies employed to improve their electrocatalytic and electrochemical performance. Conducting-Polymer-Based Catalysts for Fuel CellsFuel cells are promising green energy-conversion devices that convert chemical energy of various fuels directly into electric energy under electrochemical redox reactions. This technology provides intriguing applications in portable energy sources [14,15] and has attracted increasing attention in recent years. [16][17][18][19] Such energy-conversion systems require highly efficient electrocatalysts to trigger the oxygen reduction reaction (ORR) that occurs at the fuel cell's cathode. Platinum/ carbon (Pt/C) composite is demonstrated to be the most efficient catalyst used for fuel cells. [20][21][22] However, high price, scarcity, poor utilization efficiency, and easy carbon monoxide poisoning greatly limit its commercial applications. [23] Therefore, development of low-cost, stable, and efficient electrocatalysts for ORR is a major challenge in the field of fuel cells. [24][25][26][27][28] Owing to their highly tunable conductivity, good electrocatalytic activity, and satisfactory electrochemical stability, conducting polymers are considered to be promising electrocatalyst materials for the ORR. [29] Initially, conducting-polymer-based electrodes were fabricated through direct casting of neutral To alleviate the current energy crisis and environmental pollution, sustainable and ecofriendly energy conversion and storage systems are urgently needed. Due to their high conductivity, promising catalytic activity, and excellent electrochemical properties, conducting polymers have been attracting intense attention for use in electrochemical energy conversion and storage. Here, the latest advances regarding the utilization of conducting polymers for fuel cells and supercapacitors are introduced. The strategies employed to improve the electrocatalytic and electrochemical performances of conducting-polymerbased materials are prese...

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Facile potentiostatic preparation of functionalized polyterthiophene-anchored graphene oxide as a metal-free electrocatalyst for the oxygen reduction reaction

Abstract: A new polyterthiophene-anchored GO electrocatalyst was prepared. The C–N bonds of the polymer served as active sites for the ORR catalyst.

Cited by 36 publications

References 37 publications

Dealloyed AuNi Dendrite Anchored on a Functionalized Conducting Polymer for Improved Catalytic Oxygen Reduction and Hydrogen Peroxide Sensing in Living Cells

Dealloyed AuNi Dendrite Anchored on a Functionalized Conducting Polymer for Improved Catalytic Oxygen Reduction and Hydrogen Peroxide Sensing in Living Cells

Covalently Modified Graphenes in Catalysis, Electrocatalysis and Photoresponsive Materials

Conducting‐Polymer‐Based Materials for Electrochemical Energy Conversion and Storage

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