Nitrogen‐Doped Porous Carbon Cages for Electrocatalytic Reduction of Oxygen: Enhanced Performance with Iron and Cobalt Dual Metal Centers

Mercado, Rene; Wahl, Carolin B.; Lu, Jia; Zhang, Tianjun; Lu, Bingzhang; Zhang, Peng; Lu, Jennifer; Allen, A’Lester C.; Zhang, Jin Z.; Chen, Shaowei

doi:10.1002/cctc.201902324

Cited by 25 publications

(31 citation statements)

References 77 publications

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“…X-ray photoelectron spectroscopy (XPS) data were interpreted by analyzing the results obtained in the literature. [66][67][68][69][70][71][72][73] The survey spectra of Fe, Fe-Co, Ni-Co, and Ni-Fe-based electrocatalysts, treated at 600 or 900 • C, are shown in (Figure S1A-C) chiefly indicating the presence of carbon, nitrogen, oxygen, and metals. The unmarked peaks at 315 and 560 eV are related to the shake-up lines of C1s and N1s signals, respectively, whereas the other tiny and narrow peaks between C1s and N1s regions correspond to a low amount (<0.3%) of potassium and calcium, mainly addressed to litchi residuals.…”

Section: Characterization Of Litchi Electrocatalystsmentioning

confidence: 99%

Litchi‐derived platinum group metal‐free electrocatalysts for oxygen reduction reaction and hydrogen evolution reaction in alkaline media

Mirshokraee

Muhyuddin

Lorenzi

et al. 2023

SusMat

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Within the framework of the circular economy, the waste litchi's skins were upgraded and transformed into electrocatalysts for oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER). The waste litchi's skins were pyrolyzed, activated, and then used as carbon support for fabricating metal–nitrogen–carbons (M–N–Cs) which belong to a promising class of platinum group metal‐free electrocatalysts. The activated char was functionalized with transition metal (Fe, Ni, and Co)‐ phthalocyanine (Pc) in monometallic and bimetallic fashion by subjecting it to a thermal treatment at 600 and 900°C. The samples functionalized at 900°C showed higher performance for HER due to the formation of metal nanoparticles, whereas the samples functionalized at 600°C showed higher performance for ORR. Particularly, sample Ni–Co 900 had an overpotential of −0.38 V for HER, while the sample Fe 600 was the most active electrocatalyst for ORR by demonstrating the onset potential of ∼0.9 V (a half‐wave potential of ∼0.81 V) with the least production of unwanted peroxide anion.

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Section: Characterization Of Litchi Electrocatalystsmentioning

confidence: 99%

Litchi‐derived platinum group metal‐free electrocatalysts for oxygen reduction reaction and hydrogen evolution reaction in alkaline media

Mirshokraee

Muhyuddin

Lorenzi

et al. 2023

SusMat

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“…Moreover, the desorption of *OH, which was the rate‐determining step, was also facilitated by the coexistence of FeN 5 and SeC 2 dual active sites. Mercado et al [ 66 ] synthesized a DAC with Fe and Co dual‐metal atoms embedded into nitrogen‐doped porous carbon cages (CHS–FeCo) by controlled pyrolysis of silica nanoparticle–supported melamine–formaldehyde resin embedded with iron and cobalt precursors, followed by acid etching. The CHS–FeCo exhibited an impressive ORR performance with E onset = +0.93 V and E ½ = +0.79 V. Repeated potential sweeping showed that the polarization curves of CHS–FeCo remained virtually unchanged for up to 10 000 cycles, due to the strong incorporation of the metal centers into the carbon skeletons.…”

Section: Electrocatalytic Performancesmentioning

confidence: 99%

Dual‐Atom Catalysts for Electrochemical Energy Technologies

2023

Self Cite

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Rational design and engineering of high‐performance, low‐cost electrocatalysts represents a critical first step in the development of sustainable energy technologies. While single‐atom catalysts (SACs) have emerged as viable candidates, recent research has shown that the structure and activity can be further manipulated and enhanced by the incorporation of a second metal center in the close proximity, forming a binuclear configuration. Such dual‐atom catalysts (DACs) are recognized as feasible choices to break the limitations of SACs due to the synergetic effects between the bimetallic atoms and their special structures. Herein, the recent advances of DAC electrocatalysis for a range of important reactions, focusing on their synthesis, characterization, and performance, are summarized. The review is concluded with a perspective highlighting the challenges and future research directions.

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“…[8,[20][21][22][23] Fe/NÀ C electrocatalysts have been widely developed as ORR electrocatalysts to fulfil the demands. [24][25][26][27][28] In recent years, single-atom catalysts (SACs) possessing high atomic utilization efficiency and unique distinct properties have been developed. [13,[29][30][31][32][33][34][35] Owing to the unique structural characteristics, SACs exhibit high activity and high stability.…”

Section: Introductionmentioning

confidence: 99%

“…Transition metal‐based catalysts, such as transition metal (M), nitrogen (N) co‐doped carbons (M/N−C), have attracted attentions due to the high activity and the low cost [8,20–23] . Fe/N−C electrocatalysts have been widely developed as ORR electrocatalysts to fulfil the demands [24–28] …”

Section: Introductionmentioning

confidence: 99%

Fe Single‐atom Sites in Two‐Dimensional Nitrogen‐doped Porous Carbon for Electrocatalytic Oxygen Reduction

et al. 2022

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The development of electrocatalysts for oxygen reduction reaction (ORR) is important for energy conversion devices, such as fuel cells, and metal-air batteries. Here, we have developed a confined space strategy to prepare a two-dimensional (2D) leaflike nitrogen (N)-containing porous carbon as a single-atom catalyst substrate. ZIFÀ L materials have been confined in a thin silica layer to regulate the pyrolysis. The obtained Fe single atoms doped N-containing porous carbons (Fe SAs/NÀ C) maintain the 2D morphology and have Fe single-atom active sites. Correspondingly, Fe SAs/NÀ C exhibits excellent ORR performance (E 1/2 of 0.907 V), which is more positive than those of commercially available Pt/C (0.874 V) and most reported nonnoble metal catalysts. The durability test shows that Fe SAs/NÀ C exhibits good stability during electrocatalytic process. This rational design shows a new strategy to prepare 2D catalyst supports with single-atom active sites.

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Nitrogen‐Doped Porous Carbon Cages for Electrocatalytic Reduction of Oxygen: Enhanced Performance with Iron and Cobalt Dual Metal Centers

Abstract: This is the author manuscript accepted for publication and has undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record.

Cited by 25 publications

References 77 publications

Litchi‐derived platinum group metal‐free electrocatalysts for oxygen reduction reaction and hydrogen evolution reaction in alkaline media

Litchi‐derived platinum group metal‐free electrocatalysts for oxygen reduction reaction and hydrogen evolution reaction in alkaline media

Dual‐Atom Catalysts for Electrochemical Energy Technologies

Fe Single‐atom Sites in Two‐Dimensional Nitrogen‐doped Porous Carbon for Electrocatalytic Oxygen Reduction

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