Preparation of an efficient Fe/N/C electrocatalyst and its application for oxygen reduction reaction in alkaline media

Wang, Chunxia; Yang, Fan; Qiu, Tian; Cao, Yan; Zhong, Huangliang; Chen, Yu; Li, Ranjia; Mao, Lanqun; Li, Yongfeng

doi:10.1016/j.jelechem.2017.12.084

Cited by 28 publications

(17 citation statements)

References 48 publications

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“…The tolerances to methanol poisoning effect were investigated by chronoamperometric response tests with absolute methanol added; other test conditions are at the same as the stability tests. [56][57][58] The result of methanol measurement for 20% Pt/C catalyst is also confirmed by previous related methanol tests.…”

Section: Resultssupporting

confidence: 84%

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Template‐free synthesis of novel hollow carbon nanospheres with dual active sites as catalyst for fuel cell cathode to improve oxygen reduction reaction performances

et al. 2019

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Summary A new template‐free controlled method is reported herein to prepare the novel hollow carbon nanospheres with dual active sites of FeN4 and FeC3 by in situ growth reaction on graphene nanosheets, labeled as HCN‐FNFCG. As‐prepared HCN‐FNFCG nanomaterials possess hierarchically porous FeN4/FeC3 shells with structures of microporous, mesoporous, and macroporous properties. Moreover, the hierarchically porous HCN‐FNFCG nanomaterials with dual active sites of FeN4 and FeC3 have not been reported before. The HCN‐FNFCG nanomaterials, as oxygen reduction reaction (ORR) catalysts, are first studied systematically toward cathodic ORR of fuel cell. The measurements have illustrated that HCN‐FNFCG‐650 has the best ORR performances among these HCN‐FNFCG nanomaterials studied. The onset potential of HCN‐FNFCG‐650 has reached 1.095 V in alkaline electrolyte, and its maximum current density is 6.48 mA cm−2. Additionally, the HCN‐FNFCG‐650 has also displayed small electrochemical impedance, its Tafel‐slope value is 44.25 mV dec−1, much lower than that of the 20% Pt/C (69.57 mV dec−1). And its value of current density is still maintained 92.83% of the initial value after 9000‐second continuous tests. High tolerance against methanol crossover is also exhibited for HCN‐FNFCG‐650. This novel method of template‐free synthesis can provide a promising strategy for preparing hollow nanospheres with hierarchically porous shells. And it can be used to design ORR electrocatalysts, electrode materials, or other applications.

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Section: Resultssupporting

confidence: 84%

“…Third, the high proportion of pyridinic N and graphitic N (seen in XPS results) can decrease the Gibbs energy of oxygen adsorption toward ORR, based on previous studies. [56][57][58]…”

Section: Resultsmentioning

confidence: 99%

Template‐free synthesis of novel hollow carbon nanospheres with dual active sites as catalyst for fuel cell cathode to improve oxygen reduction reaction performances

et al. 2019

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“…And, the graphitic N (401.1 eV) might originate from the supporting carbon material (Vulcan XC-72) (Li et al, 2012). As shown in Figure 5C, Fe 2p XPS spectra exhibit multiple peaks, indicating that there are many chemical Fe species in Fe-PIPhen/C catalyst (Wang et al, 2018). The Fe 2p 3/2 peak at 710.5 eV and the Fe 2p 1/2 peaks at 724.3 eV suggested the existence of Fe 2+ ion in the composite (Lu et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Supramolecular Iron Complex Formed Between Nitrogen Riched Phenanthroline Derivative and Iron With Improved Oxygen Reduction Activity in Alkaline Electrolyte

Chu

et al. 2019

Front. Chem.

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In this work, the synthesis and evaluation of a new type non-noble metal oxygen reduction reaction (ORR) catalyst is reported. The catalyst is a complex containing iron ions and multiple N active sites, which displayed excellent oxygen reduction activity in alkaline medium. 2-(2-(4-(1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl)pyridin-2-yl)pyridin-4-yl)-1H-imidazo[4,5-f][1,10]phenanthroline (PIPhen) was synthesized and used as a ligand to form a rich nitrogen iron coordination complex (Fe-PIPhen), and the complex was then loaded onto the carbon powder to form the target catalyst of Fe-PIPhen/C. The physical characterization of the catalyst was conducted by using Scanning Electron Microscopy (SEM), nitrogen adsorption-desorption and X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller analysis etc. Electrochemical characterizations were realized by taking cyclic voltammetry (CV), linear sweep voltammetry (LSV) and rotating ring disk electrode (RRDE). The results show that Fe-PIPhen/C possesses the good performance; it exhibits a high electrocatalytic activity, which is mainly via a four electron ORR pathway, with a low hydrogen peroxide yield of 2.58%. And, the average electron transfer number of 3.93 was obtained in alkaline electrolyte. In summary, Fe-PIPhen/C will likely become a promising alternative to Pt catalyst in fuel cell.

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“…[36] In particular, pyrolyzed carbon-based catalysts with heteroatoms/transition metals (e.g. Fe and/or Co) [37][38][39] are the most promising alternatives due to reach to more active sites, high activity and low-cost as ORR catalysts. Nevertheless, further improvement in view of synthetic feasibly, material cost and catalytic performances remains an exciting and interesting cause for developing new electro-active materials towards ORR.…”

Section: Introductionmentioning

confidence: 99%

Bagasse derived C@Fe3C/Fe3O4 composite: An Approach towards low cost electrocatalyst for oxygen reduction reaction

Manippady

Khan

Samal

et al. 2021

Preprint

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As the world is heading towards sustainable future, it is highly important to develop low-cost electrocatalysts for energy generation devices. Herein, we report synthesis of iron-carbon hybrid (C@Fe3C/Fe3O4) nanocomposite for oxygen reduction reaction (ORR), synthesized using bagasse as a carbon source material and Fe(III) precursor at 900 ˚C. The synthesized C@Fe3C/Fe3O4 composite exhibits a high surface area of ~930 m2/g. The electrode material has a 0.86 V overpotential vs RHE. Moreover, the electrocatalyst shows catalytic stability upto 44,000 s at the static potential of 0.25 V vs RHE at the rotation speed of 1600 rpm. Herein, the electron transfer number is calculated to be 3.76-3.94 which suggest that the electrocatalyst could catalyze ORR nearly through a 4 electron transfer process in alkaline solution.

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Preparation of an efficient Fe/N/C electrocatalyst and its application for oxygen reduction reaction in alkaline media

Cited by 28 publications

References 48 publications

Template‐free synthesis of novel hollow carbon nanospheres with dual active sites as catalyst for fuel cell cathode to improve oxygen reduction reaction performances

Template‐free synthesis of novel hollow carbon nanospheres with dual active sites as catalyst for fuel cell cathode to improve oxygen reduction reaction performances

Supramolecular Iron Complex Formed Between Nitrogen Riched Phenanthroline Derivative and Iron With Improved Oxygen Reduction Activity in Alkaline Electrolyte

Bagasse derived C@Fe3C/Fe3O4 composite: An Approach towards low cost electrocatalyst for oxygen reduction reaction

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