Recent Advancements in Transition Metal‐Nitrogen‐Carbon Catalysts for Oxygen Reduction Reaction

Gu, Wenling; Hu, Lili; Li, Jing; Wang, Erkang

doi:10.1002/elan.201700780

Cited by 85 publications

(50 citation statements)

References 113 publications

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“…Therefore, for cost and stability reasons, new catalysts for the ORR are highly sought after. Attention in recent years has focused on transition metal active centers in carbon matrices, especially where the carbon is doped with heteroatoms such as nitrogen, though the presence of metal in these materials leads to significant durability challenges, again, particularly in acidic media, and so a new class of entirely metal‐free ORR catalysts has emerged in recent years as cost effective, durable, and electrochemically selective alternatives to traditional materials …”

Section: D Carbons For the Orrmentioning

confidence: 99%

3D Carbon Materials for Efficient Oxygen and Hydrogen Electrocatalysis

Sobrido

Jervis

Periasamy

et al. 2019

Advanced Energy Materials

114

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Sustainable energy production at an acceptable cost is key for its widespread application. At present, noble metals and metal oxides are the most widely used for electrocatalysis, but they suffer from low selectivity, poor durability, and scarcity. Because of this, metal‐free carbons have become the subject of great interest as promising alternative electrocatalysts for energy conversion and storage devices, and remarkable progress has been accomplished in the advance of metal‐free carbons as electrocatalysts for renewable energy technologies. Particularly interesting are 3D porous carbon architectures, which exhibit outstanding features for electrocatalysis applications, including broad range of active sites, interconnected porosity, high conductivity, and mechanical stability. This review summarizes the latest advances in 3D porous carbon structures for oxygen and hydrogen electrocatalysis. The structure–performance relationship of these materials is consequently rationalized and perspectives on creating more efficient 3D carbon electrocatalysts are suggested.

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Section: D Carbons For the Orrmentioning

confidence: 99%

3D Carbon Materials for Efficient Oxygen and Hydrogen Electrocatalysis

Sobrido

Jervis

Periasamy

et al. 2019

Advanced Energy Materials

114

View full text Add to dashboard Cite

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“…Various non-noble materials have been developed for ORR or OER [4][5][6][7][8], including but not limited to carbon, polymer,…”

Section: Introductionmentioning

confidence: 99%

Efficiently Enhancing Electrocatalytic Activity of α-MnO2 Nanorods/N-Doped Ketjenblack Carbon for Oxygen Reduction Reaction and Oxygen Evolution Reaction Using Facile Regulated Hydrothermal Treatment

Wang

Chen

et al. 2018

Catalysts

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Scalable, low-cost and highly efficient catalysis of oxygen electrocatalytic reactions (ORR/OER) are required for the rapid development of clean and renewable energy conversion/storage technologies. Herein, two types of α-MnO 2 nanorods were prepared under hydrothermal treatment at 150 • C for 0.5 h (MnO 2 -150-0.5) or 120 • C for 12 h (MnO 2 -120-12), then supported on N-doped ketjenblack carbon (N-KB) as bi-functional ORR/OER catalysts. Their electrocatalytic activities toward ORR and OER were investigated systematically. As a result, MnO 2 -150-0.5/N-KB displays superior ORR catalytic activity, with much more positive half-wave potential and much larger limiting current density (0.76 V and 6.0 mA cm −2 ), comparable to those of 20 wt. % Pt/C (0.82 V and 5.10 mA cm −2 ). MnO 2 -150-0.5/N-KB also shows high electron transfer number (3.86~3.97) and low yield of peroxides (1-7%) during ORR process in the whole potential range of 0-1.0 V (vs. RHE). Meanwhile, the MnO 2 -150-0.5/N-KB also exhibits better OER activity with low overpotential, comparable to IrO 2 /N-KB. The excellent electrocatalytic activity of MnO 2 -150-0.5/N-KB can be attributed to the synergistic effect, relatively smaller size, higher amount of Mn 3+ , and low charge transfer resistance. This work offers a new strategy for scalable preparation of more efficient and cost-effective α-MnO 2 bi-functional oxygen catalysts.

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“…Traditional Fe‐ and Co‐based electrocatalysts with metal‐nitrogen structure have provided intriguing paradigms for ORR . The unique filled d xy , yz orbitals and empty d z 2 orbitals in Fe 2+/3+ and Co 2+ are favorable for bonding with O 2 molecules so as to break OO bond . Since the report of Yeager group in 1989, carbon‐supported metal‐nitrogen coordination as ORR electrocatalyst has been rapidly developed like mushrooming.…”

mentioning

confidence: 99%

A General Method for Transition Metal Single Atoms Anchored on Honeycomb‐Like Nitrogen‐Doped Carbon Nanosheets

et al. 2020

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Excavating and developing highly efficient and cost‐effective nonnoble metal single‐atom catalysts for electrocatalytic reactions is of paramount significance but still in its infancy. Herein, reported is a general NaCl template‐assisted strategy for rationally designing and preparing a series of isolated transition metal single atoms (Fe/Co/Ni) anchored on honeycomb‐like nitrogen‐doped carbon matrix (M1‐HNC‐T1‐T2, M = Fe/Co/Ni, T1 = 500 °C, T2 = 850 °C). The resulting M1‐HNC‐500‐850 with M‐N4 active sites exhibits superior capability for oxygen reduction reaction (ORR) with the half‐wave potential order of Fe1‐HNC‐500‐850 > Co1‐HNC‐500‐850 > Ni1‐HNC‐500‐850, in which Fe1‐HNC‐500‐850 shows better performance than commercial Pt/C. Density functional theory calculations reveal a choice strategy that the strong p–d‐coupled spatial charge separation results the Fe‐N4 effectively merges active electrons for elevating d‐band activity in a van‐Hove singularity like character. This essentially generalizes an optimal electronic exchange‐and‐transfer (ExT) capability for boosting sluggish alkaline ORR activity. This work not only presents a universal strategy for preparing single‐atom electrocatalyst to accelerate the kinetics of cathodic ORR but also provides an insight into the relationship between the electronic structure and the electrocatalytical activity.

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Recent Advancements in Transition Metal‐Nitrogen‐Carbon Catalysts for Oxygen Reduction Reaction

Cited by 85 publications

References 113 publications

3D Carbon Materials for Efficient Oxygen and Hydrogen Electrocatalysis

3D Carbon Materials for Efficient Oxygen and Hydrogen Electrocatalysis

Efficiently Enhancing Electrocatalytic Activity of α-MnO2 Nanorods/N-Doped Ketjenblack Carbon for Oxygen Reduction Reaction and Oxygen Evolution Reaction Using Facile Regulated Hydrothermal Treatment

A General Method for Transition Metal Single Atoms Anchored on Honeycomb‐Like Nitrogen‐Doped Carbon Nanosheets

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