N-doped porous carbon nanosheets as pH-universal ORR electrocatalyst in various fuel cell devices

Liu, Liangzhen; Zeng, Guang; Chen, Junxiang; Bi, Linlin; Dai, Liming; Wen, Zhenhai

doi:10.1016/j.nanoen.2018.04.061

Cited by 313 publications

(130 citation statements)

References 66 publications

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“…Therefore, the existence of the Mn–N peaks indicates the formation of MnN bonds in both the MnNPC‐900 and MnNC‐900. Besides, XPS spectra of C 1s (see Figure S4b in the Supporting Information) for the MnNPC‐900 exhibit a main peak centered at around 284.7 eV can be assigned to the graphitic carbon, whereas weak peaks at 286.3 (CN) and 287.9 eV (CN) are attributed to the coordination between carbon atoms with doped N atoms . It further affirms the formation of N‐doped carbon in the MnNPC‐900.…”

Section: Methodssupporting

confidence: 52%

“…Furthermore, the defective structure of the MnNPC‐900 was determined by the Raman spectra in Figure S3 (Supporting Information). Specifically, two main bands at ≈1334 and 1592 cm −1 are detected in the MnNPC‐900, which can be ascribed to the D band induced by defects and G band caused by sp 2 hybridization carbon atoms, respectively . Among them, the ratio of the intensities of D and G band ( I D / I G ) for the MnNPC‐900 (0.88) is higher than that of the MnNC‐900 (0.84), implying that the successful doping of P has induced the high level of structural disorder …”

Section: Methodsmentioning

confidence: 97%

“…The fuel cell technology has attracted great research interest owing to its high energy efficiency and zero‐carbon emission . However, the sluggish oxygen reduction reaction (ORR) has severely restrained the potential commercialization of fuel cells, which requires the usage of expensive and fuel‐vulnerable platinum (Pt) based catalysts.…”

Section: Methodsmentioning

confidence: 99%

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N,P Co‐Coordinated Manganese Atoms in Mesoporous Carbon for Electrochemical Oxygen Reduction

Zhu

Amal

2019

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The increasing interest in fuel cell technology encourages the development of efficient and low‐cost electrocatalysts to replace the Pt based materials for catalyzing the cathodic oxygen reduction reaction (ORR). In the present work, a nitrogen and phosphorus co‐coordinated manganese atom embedded mesoporous carbon composite (MnNPC‐900) is successfully prepared via a polymerization of o‐phenylenediamine followed by calcination at 900 °C. The MnNPC‐900 composite shows a high ORR activity in alkaline media, offering an onset potential of 0.97 V, and a half‐wave potential of 0.84 V (both vs reversible hydrogen electrode) with a loading of 0.4 mg cm−2. This performance not only exceeds its phosphorus‐free counterpart (MnNC‐900), but also is comparable to the Pt/C catalyst under identical measuring conditions. The significantly enhanced ORR performance of MnNPC‐900 can be ascribed to: i) the introduction of phosphorus assists the generation of mesopores during the pyrolysis and endows the MnNPC‐900 composite with large surface area and pore volume, thus facilitating the mass transfer process and increases the number of exposed active sites. ii) The formation of N,P co‐coordinated atomic‐scale Mn sites (MnNxPy), which modifies the electronic configuration of the Mn atoms and thereby boosts the ORR catalytic activity.

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Section: Methodssupporting

confidence: 52%

Section: Methodsmentioning

confidence: 97%

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N,P Co‐Coordinated Manganese Atoms in Mesoporous Carbon for Electrochemical Oxygen Reduction

Zhu

Amal

2019

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“…The first non‐nitrogen doped metal‐free ORR electrocatalyst (B‐doped CNTs) was reported in 2011, leading to the research and development of various new C‐MFECs . Figure represents the important innovations in the field of C‐MFECs during the last 10 years …”

Section: Ten Years’ Advancement Of C‐mfecsmentioning

confidence: 99%

“…[1][2][3][4][21][22][23][24][25][26] In fact, the utilization of C-MFECs for ORR electrocatalysis is now relatively well-established. This is evidenced by not only the recent development of C-MFECs with and without N-doping for ORR in a wide pH range, 32,35,36 but also the superdoping of heteroatoms (N, S, or B) into carbon materials with the precise control of heteroatom-doping level over a wide range (up to 29.82, 17.55, and 10.79 at% for N-, S-, and B-doping, respectively) through a fluorination-defluorination technique. 28,37 Figure 2 shows the mechanism of superdoping and its potential utilization for ORR at cathode in a fuel cell.…”

Section: Ten Years' Advancement Of C-mfecsmentioning

confidence: 99%

Ten years of carbon‐based metal‐free electrocatalysts

et al. 2019

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Since the discovery of the first carbon-based metal-free electrocatalysts (C-MFECs, i.e., N-doped carbon nanotubes) for the oxygen reduction reaction in 2009, the field of C-MFECs has grown enormously over the last 10 years.C-MFECs, as alternatives to nonprecious transition metals and/or precious noble metal-based electrocatalysts, have been consistently demonstrated as efficient catalysts for oxygen reduction, oxygen evolution, hydrogen evolution, carbon dioxide reduction, nitrogen reduction, and many other (electro-) chemical reactions. Recent research and development of C-MFECs have indicated their potential applications in fuel cells, metal-air batteries, and hydrogen generation through water oxidation as well as electrochemical production of various commodity chemicals, such as ammonia, alcohols, hydrogen peroxide, and other useful hydrocarbons. Further research and development of C-MFECs would surely revolutionize traditional energy conversion and storage technologies with minimal environmental impact. In this short review article, we summarize the journey of C-MFECs over the past 10 years with an emphasis on materials development and their structure-property characterization for applications in fuel cells and metal-air batteries. Current challenges and future prospects of this emerging field are also discussed. K E Y W O R D Scarbon, electrocatalysis, energy conversion, energy storage, metal-free electrocatalyst

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Functionalized Carbon Nanomaterials (FCNMs): A Green and Sustainable Vision

Issar

Arora

2021

Environmental Applications of Carbon Nanomaterials‐Based Devices

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N-doped porous carbon nanosheets as pH-universal ORR electrocatalyst in various fuel cell devices

Cited by 313 publications

References 66 publications

N,P Co‐Coordinated Manganese Atoms in Mesoporous Carbon for Electrochemical Oxygen Reduction

N,P Co‐Coordinated Manganese Atoms in Mesoporous Carbon for Electrochemical Oxygen Reduction

Ten years of carbon‐based metal‐free electrocatalysts

Functionalized Carbon Nanomaterials (FCNMs): A Green and Sustainable Vision

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