Experimental identification of the active sites in pyrolyzed carbon-supported cobalt–polypyrrole–4-toluenesulfinic acid as electrocatalysts for oxygen reduction reaction

Sha, Hao-Dong; Yuan, Xing; Li, Lin; Ma, Zhong; Ma, Zhenqiang; Zhang, Jiujun

doi:10.1016/j.jpowsour.2014.01.013

Cited by 43 publications

(22 citation statements)

References 33 publications

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“…S1 , Supporting Information ) could also display surface cobalt content of 1.03 at% (PPy-CTAB-Co) and 0.24 at% (PPy-Co) in the catalysts, respectively. Consulting with our previous research 40 , these results imply that the cobalt in the catalysts are bonded to nitrogen as Co-N structure, but not exist as metallic cobalt or its oxide.…”

Section: Discussionsupporting

confidence: 83%

Novel nanowire-structured polypyrrole-cobalt composite as efficient catalyst for oxygen reduction reaction

Yuan

et al. 2016

Sci Rep

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A novel nanowire-structured polypyrrole-cobalt composite, PPy-CTAB-Co, is successfully synthesized with a surfactant of cetyltrimethylammounium bromide (CTAB). As an electro-catalyst towards oxygen reduction reaction (ORR) in alkaline media, this PPy-CTAB-Co demonstrates a superior ORR performance when compared to that of granular PPy-Co catalyst and also a much better durability than the commercial 20 wt% Pt/C catalyst. Physiochemical characterization indicates that the enhanced ORR performance of the nanowire PPy-CTAB-Co can be attributed to the high quantity of Co-pyridinic-N groups as ORR active sites and its large specific surface area which allows to expose more active sites for facilitating oxygen reduction reaction. It is expected this PPy-CTAB-Co would be a good candidate for alkaline fuel cell cathode catalyst.

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Section: Discussionsupporting

confidence: 83%

Novel nanowire-structured polypyrrole-cobalt composite as efficient catalyst for oxygen reduction reaction

Yuan

et al. 2016

Sci Rep

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“…Rotating disk electrode (RDE) measurements were carried out to further evaluate the catalytic performance of the Fe‐NMCSs. The Fe‐NMCSs catalyst exhibited an onset potential of 1.027 V with a half‐wave potential ( E 1/2 ) of 0.86 V, which is even better than that of commercial Pt/C catalyst (Figure a). In sharp contrast, the catalytic activity of the NMCSs catalyst was much worse compared to that of the Fe‐NMCSs, even if they both held a similar structure and approximately the same nitrogen content (with a mainly consistent nitrogen species distribution).…”

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confidence: 87%

Reactive Multifunctional Template‐Induced Preparation of Fe‐N‐Doped Mesoporous Carbon Microspheres Towards Highly Efficient Electrocatalysts for Oxygen Reduction

et al. 2016

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A novel in situ replication and polymerization strategy is developed for the synthesis of Fe-N-doped mesoporous carbon microspheres (Fe-NMCSs). This material benefits from the synergy between the high catalytic activity of Fe-N-C and the fast mass transport of the mesoporous microsphere structure. Compared to commercial Pt/C catalysts, the Fe-NMCSs show a much better electrocatalytic performance in terms of higher catalytic activity, selectivity, and durability for the oxygen reduction reaction.

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“…The development of highly active electrocatalysts has been an intense research point in the field of proton exchange membrane fuel cells (PEMFCs) [1][2][3][4]. It is believed that a major prerequisite for the commercialization of PEMFCs is significantly reducing their fabrication cost.…”

Section: Introductionmentioning

confidence: 99%

Nanoporous PdZr surface alloy as highly active non–platinum electrocatalyst toward oxygen reduction reaction with unique structure stability and methanol–tolerance

Duan

2016

Journal of Power Sources

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Nanoporous (NP) PdZr alloy with controllable bimetallic ratio is successfully fabricated by a simple dealloying method. By leaching out the more reactive Al from PdZrAl precursor alloy, NP-PdZr alloy with smaller ligament size was generated, characterized by the nanoscaled interconnected network skeleton and hollow channels extending in all three dimensions. Upon voltammetric scan in acid solution, the dissolution of surface Zr atoms generates the highly active Pd-Zr surface alloy with a nearly pure Pd surface and Pd-Zr alloy core. The NP-Pd 80 Zr 20 surface alloy exhibits markedly enhanced specific and mass activities as well as higher catalytic stability toward oxygen reduction reaction (ORR) compared with NP-Pd and the state-of-the-art Pt/C catalysts. In addition, the NP-Pd 80 Zr 20 surface alloy shows a better selectivity for ORR than methanol in the 0.1 M HClO 4 and 0.1 M methanol mixed solution. X-ray photoelectron spectroscopy and density functional theory calculations both demonstrate that the weakened Pd-O bond and improved ORR

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Experimental identification of the active sites in pyrolyzed carbon-supported cobalt–polypyrrole–4-toluenesulfinic acid as electrocatalysts for oxygen reduction reaction

Cited by 43 publications

References 33 publications

Novel nanowire-structured polypyrrole-cobalt composite as efficient catalyst for oxygen reduction reaction

Novel nanowire-structured polypyrrole-cobalt composite as efficient catalyst for oxygen reduction reaction

Reactive Multifunctional Template‐Induced Preparation of Fe‐N‐Doped Mesoporous Carbon Microspheres Towards Highly Efficient Electrocatalysts for Oxygen Reduction

Nanoporous PdZr surface alloy as highly active non–platinum electrocatalyst toward oxygen reduction reaction with unique structure stability and methanol–tolerance

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