Dual-Template Construction of Iron–Nitrogen-Codoped Hierarchically Porous Carbon Electrocatalyst for Oxygen Reduction Reaction

Luo, Yan; Zhang, Jie; Chen, Jinwei; Chen, Yihan; Li, Zhenjie; Shi, Junjie; Wang, Gang; Wang, Ruilin

doi:10.1021/acs.energyfuels.0c02783

Cited by 17 publications

(6 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fitting results of the Raman spectra of the N–C and W–N–C samples (Table S1) reveal a higher I D / I G ratio of 3.89 for W–N–C compared with that for N–C (2.58), which should be due to the W coordination increasing the proportion of five-member rings or heteroatoms in carbon structures. This further confirms that W is successfully doped into the structure of the carbon supporter in the W–N–C sample. , …”

Section: Results and Discussionsupporting

confidence: 72%

“…Nonprecious metal catalysts based on transition metals such as Fe, , Co, , Ni, Mn, Cr, Mo, Zn, Cu, etc. have been investigated to replace Pt because of their extreme chemical stability, good electrical conductivity, and low cost.…”

Section: Introductionmentioning

confidence: 99%

“…have been investigated to replace Pt because of their extreme chemical stability, good electrical conductivity, and low cost. Recently, these catalysts have been synthesized as single-atom catalysts (SACs) due to their particular metal–support interactions that enable high activity and durability. − Most SACs act as active sites for the ORR by binding with nitrogen–carbon (N–C). , Among them, Fe/Co-based SACs were considered as the greatest potential for the ORR. However, due to the oxidative attack of the H 2 O 2 intermediate during the ORR process, the active metal sites are dissolved, resulting in poor stability of such Fe/Co-based SACs under high voltages. , Therefore, new SACs with better activity and stability need to be explored.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2021

View full text Add to dashboard Cite

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.

show abstract

Section: Results and Discussionsupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Furthermore, templating enhanced the surface area from 447 m 2 g −1 to 1326 m 2 g −1 . Luo et al [87] investigated using a dual-template strategy with silica nanospheres as a hard template and two different MOFs coated onto the surface as the selfsacrificing templates. Subsequent pyrolysis/etching of the dual template yielded porous Fe and N co-doped carbon with highly exposed active sites.…”

Section: Templated Methodsmentioning

confidence: 99%

Recent Advancements in the Synthesis and Application of Carbon-Based Catalysts in the ORR

Macchi¹,

Denmark²,

Le³

et al. 2021

Electrochem

View full text Add to dashboard Cite

Fuel cells are a promising alternative to non-renewable energy production industries such as petroleum and natural gas. The cathodic oxygen reduction reaction (ORR), which makes fuel cell technology possible, is sluggish under normal conditions. Thus, catalysts must be used to allow fuel cells to operate efficiently. Traditionally, platinum (Pt) catalysts are often utilized as they exhibit a highly efficient ORR with low overpotential values. However, Pt is an expensive and precious metal, posing economic problems for commercialization. Herein, advances in carbon-based catalysts are reviewed for their application in ORRs due to their abundance and low-cost syntheses. Various synthetic methods from different renewable sources are presented, and their catalytic properties are compared. Likewise, the effects of heteroatom and non-precious metal doping, surface area, and porosity on their performance are investigated. Carbon-based support materials are discussed in relation to their physical properties and the subsequent effect on Pt ORR performance. Lastly, advances in fuel cell electrolytes for various fuel cell types are presented. This review aims to provide valuable insight into current challenges in fuel cell performance and how they can be overcome using carbon-based materials and next generation electrolytes.

show abstract

“…The respective electrode reactions at cathode and anode are as follows. The state-of-the-art catalyst used for HOR and ORR is Pt supported on conducting carbon support (Pt/C). , While the kinetics of HOR is sufficiently fast on Pt/C, the cathodic ORR is relatively slow, multi-step, and sluggish, which typically contributes to the major bottleneck in PEMFCs’ efficiency. − In general, the ORR catalytic activity of metal-supported carbon mainly depends on the critical steps of (i) O 2 adsorption energy, (ii) O–O bond dissociation energy (OOH), and (iii) OH binding energy. Among all the metals, Pt-based catalysts exhibit low O 2 adsorption energy and the optimal counterbalance between the binding energies of OOH – and OH – intermediates during the ORR process .…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanofibers as Potential Catalyst Support for Fuel Cell Cathodes: A Review

et al. 2021

View full text Add to dashboard Cite

Polymer electrolyte membrane fuel cells (PEMFCs) are a fast growing next-generation energy conversion technology, which hold promising interest for transportation and other applications. Nevertheless, successful commercialization of PEMFCs has been significantly retarded principally due to the high cost and poor durability of Pt/C catalysts used for anodic and cathodic reactions. Under typical fuel cell operating conditions, a traditional Pt/C catalyst is prone to degrade by various mechanisms, such as electrochemical carbon corrosion, which results in detrimental effects on the long-term performance. There have been tremendous efforts undertaken to develop durable carbon supports by introducing graphitic carbon components. In this context, carbon nanofiber supported catalysts have been investigated as highly durable supports for Pt and non-Pt nanoparticles in recent years. We anticipate it is timely to review the developments in this topic. This Review highlights the current progress on the graphitic nanofibers as a catalyst support in terms of morphology, electrocatalytic activity, various functionalization strategies, and so on, specifically focusing on the effect of nanofiber edge carbons and the advantages of surface reconstruction of nanofiber edge carbon into loops with regard to the stability of carbon support and fuel cell performance. We believe this Review stands as a guide for future researchers to figure out a rational design of oxygen reduction reaction catalysts, especially dealing with highly graphitized carbons.

show abstract

Dual-Template Construction of Iron–Nitrogen-Codoped Hierarchically Porous Carbon Electrocatalyst for Oxygen Reduction Reaction

Cited by 17 publications

References 40 publications

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

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

Recent Advancements in the Synthesis and Application of Carbon-Based Catalysts in the ORR

Carbon Nanofibers as Potential Catalyst Support for Fuel Cell Cathodes: A Review

Contact Info

Product

Resources

About