Highly active electrocatalyst for oxygen reduction reaction from pyrolyzing carbon-supported iron tetraethylenepentamine complex

Zhang, Huijuan; Li, Haoliang; Li, Xiangtai; Zheng, Shiyou; Zhao, Bin; Yang, Jing

doi:10.1016/j.apcatb.2014.06.014

Cited by 13 publications

(4 citation statements)

References 34 publications

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“…5c. For CNx-(1/1), the overall N 1s peak exhibits a shift towards higher binding energy due to the presence of [43][44][45]._ENREF_57 As can be seen in Table 2 [46][47][48]. As shown in Table 2, CN x -(1/1) contains higher fraction of C-O-C as compared to that of CN x -(0/0).…”

Section: Page 8 Of 47mentioning

confidence: 73%

Oxygen reduction reaction activity of nitrogen, oxygen and sulphur containing carbon derived from low-temperature pyrolysis of poultry featherfiber

Sharma¹,

Kar²

2015

Electrochimica Acta

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Section: Page 8 Of 47mentioning

confidence: 73%

Oxygen reduction reaction activity of nitrogen, oxygen and sulphur containing carbon derived from low-temperature pyrolysis of poultry featherfiber

Sharma¹,

Kar²

2015

Electrochimica Acta

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“…where j, j K , and j L are the current density, kinetic, and limited current density, respectively; B and ω are the proportionality coefficient and the angular velocity, respectively; F and ν are the Faraday constant and the kinematic viscosity of the electrolyte, respectively; and D 0 and C 0 are the diffusion coefficient and the concentration of O 2 , respectively. Also, we used eqs 4 and 5 to calculate the proportion of peroxide yield (HO 2 − percent) and the number of electrons transferred (n), according to the disk current (I D ) and ring current (I R ) 38…”

Section: Methodsmentioning

confidence: 99%

“…The LSV curves were recorded from 400 to 2025 rpm for both W–N–C and 20% Pt/C electrodes. The potential of the RHE is calculated according to the following formula Using the Koutecky–Levich equation (eqs and ), we calculated the kinetic current density ( j K ) and electron transfer number ( n ) for the ORR at a rotating disk electrode (RDE) , where j , j K , and j L are the current density, kinetic, and limited current density, respectively; B and ω are the proportionality coefficient and the angular velocity, respectively; F and ν are the Faraday constant and the kinematic viscosity of the electrolyte, respectively; and D 0 and C 0 are the diffusion coefficient and the concentration of O 2 , respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Also, we used eqs and to calculate the proportion of peroxide yield (HO 2 – percent) and the number of electrons transferred ( n ), according to the disk current ( I D ) and ring current ( I R ) where the collection efficiency of the Pt ring is N = 0.4. With a rotation rate of 1600 rpm, the chronoamperometric stability technique and methanol tolerance measurement were tested at the potential of 0.6 V. Also, the accelerated durability measurement was tested between 0.6 and 1.0 V by a scan speed of 50 mV s –1 .…”

Section: Methodsmentioning

confidence: 99%

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Framework-Derived Tungsten Single-Atom Catalyst for Oxygen Reduction Reaction

et al. 2021

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For many types of fuel cells (FCs), the electrochemical oxygen reduction reaction (ORR) is the bottleneck reaction. At present, a major challenge to the industrialization of these devices is attributed to the high price and inferior stability of the common platinum group metal (PGM) catalysts. To address this issue, a zeolitic imidazolate framework (ZIF-8) derived tungsten (W) single-atom electrocatalyst has been synthesized and evaluated for the ORR. It was found that the prepared catalyst (W–N–C) possesses a W single-atom catalysis center coordinated in a nitrogen-rich carbon matrix with a half-wave potential (E 1/2) of 0.86 V and a negligible current decay over a long-term durability test, which surpass those of many reported nonprecious metals and even commercial Pt/C catalysts.

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Mechanistic Insights into the Oxygen Reduction Reaction on Metal–N–C Electrocatalysts under Fuel Cell Conditions

et al. 2016

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Three different transition metal‐C‐N catalysts are tested under a range of fuel cell conditions. It is found that common features of the polarisation curve can be explained by a change in electrocatalytic mechanism. Utilising a simple model to quantify the change in mechanisms, iR‐free results of the fuel cell experiments are fit and found to be represented by a common set of parameters. The change in mechanism is assumed to be a switch from four‐electron reduction of oxygen to water to a two‐electron reduction to hydrogen peroxide followed by disproportionation of the hydrogen peroxide to water and oxygen. The data is used to estimate a mass specific exchange current density towards the oxygen reduction reaction (ORR) to water in the range 10−11–10−13 A g−1 depending on the catalyst. For the reduction of oxygen to hydrogen peroxide, the mass specific exchange current density is estimated to be in the range 10−2–10−3 A g−1. Utilising the electrokinetic model, it is shown how the mass transport losses can be extracted from the polarisation curve. For all three catalyst layers studied, these mass transport losses reach about 100 mV at a current density of 1 A cm−2. Finally a discussion of the performance and site density requirements of the non‐precious metal catalysts are provided, and it is estimated that the activity towards the ORR needs to be increased by an order of magnitude, and the site density by two/three orders of magnitude to compete with platinum as an ORR electrocatalyst.

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Highly active electrocatalyst for oxygen reduction reaction from pyrolyzing carbon-supported iron tetraethylenepentamine complex

Cited by 13 publications

References 34 publications

Oxygen reduction reaction activity of nitrogen, oxygen and sulphur containing carbon derived from low-temperature pyrolysis of poultry featherfiber

Oxygen reduction reaction activity of nitrogen, oxygen and sulphur containing carbon derived from low-temperature pyrolysis of poultry featherfiber

Framework-Derived Tungsten Single-Atom Catalyst for Oxygen Reduction Reaction

Mechanistic Insights into the Oxygen Reduction Reaction on Metal–N–C Electrocatalysts under Fuel Cell Conditions

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