Boosting the activity of non-platinum group metal electrocatalyst for the reduction of oxygen via dual-ligated atomically dispersed precursors immobilized on carbon supports

Zhou, Yu; Al-Zoubi, Talha; Ma, Yanling; Hsiao, Haw Wen; Zhang, Cheng; Sun, Chengjun; Zuo, Jian; Yang, Hong

doi:10.1016/j.nanoen.2021.106547

Cited by 9 publications

(3 citation statements)

References 55 publications

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“…High‐resolution TEM images for Fe@Fe‐N‐C (Figure 1b–e) indicate that the Fe NPs are almost uniformly covered by onion‐like graphitic carbon layers with the d‐spacing of about 0.35 nm assigning to (002) plane of graphitic carbon. [ 30,31 ] Referring to previous literature reports, the graphitization of carbon matrix is beneficial to enhance the electroconductibility and corrosion resistance of M‐N‐C catalysts, thereby enhancing catalyst activity and stability. [ 3,15 ] HRTEM images (Figure 1d,e) demonstrate a lattice spacing of 0.204 nm, matching well to (110) plane of metallic iron.…”

Section: Resultsmentioning

confidence: 99%

Architecting FeN_x on High Graphitization Carbon for High‐Performance Oxygen Reduction by Regulating d‐Band Center

Wen

Han

et al. 2023

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Fe single atoms and N co‐doped carbon nanomaterials (Fe‐N‐C) are the most promising oxygen reduction reaction (ORR) catalysts to replace platinum group metals. However, high‐activity Fe single‐atom catalysts suffer from poor stability owing to the low graphitization degree. Here, an effective phase‐transition strategy is reported to enhance the stability of Fe‐N‐C catalysts by inducing increased degree of graphitization and incorporation of Fe nanoparticles encapsulated by graphitic carbon layer without sacrificing activity. Remarkably, the resulted Fe@Fe‐N‐C catalysts achieved excellent ORR activity (E1/2 = 0.829 V) and stability (19 mV loss after 30K cycles) in acid media. Density functional theory (DFT) calculations agree with experimental phenomena that additional Fe nanoparticles not only favor to the activation of O2 by tailoring d‐band center position but also inhibit the demetallization of Fe active center from FeN4 sites. This work provides a new insight into the rational design of highly efficient and durable Fe‐N‐C catalysts for ORR.

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Section: Resultsmentioning

confidence: 99%

Architecting FeN_x on High Graphitization Carbon for High‐Performance Oxygen Reduction by Regulating d‐Band Center

Wen

Han

et al. 2023

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“…7,8 However, the commercial application of ZABs for large-scale energy storage is plagued by the severe scarcity and high production cost of noble metal-based catalysts. [9][10][11] The development of noble metal-free catalysts with efficient bifunctional activity for rechargeable ZABs is extremely imperative. To date, the state-of-the-art synthesis of catalysts usually requires harsh reaction conditions at high temperatures with severe toxic emissions.…”

Section: Introductionmentioning

confidence: 99%

Electric field-induced phosphorization to prepare CoP@Biochar composites for efficient bifunctional oxygen electrocatalysis

Wu,

Zhou,

Teng

et al. 2024

Green Chem.

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“…[1][2][3] However, to achieve high energy density for its system, electrocatalyst in air electrode take crucial role among the overall components. [4][5][6][7] With this reason, many researchers are actively developing advanced electrocatalyst with nonprecious metals. Among them, metal-carbon core-shell catalysts are showing extremely high activity for ORR especially in alkaline media and further, showing great stability even comparable to Platinum (Pt) on carbon.…”

Section: Introductionmentioning

confidence: 99%

Switching Electric Double Layer Potential by Phase Structure Control for Advanced Oxygen Reduction Reaction of Cobalt@Nitrogen Doped Carbon Core–Shell

Kim,

Ji,

Jeong

et al. 2023

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The key to design an advanced oxygen reduction reaction (ORR) electrocatalyst is a well‐balance between the adsorption and desorption of oxygen intermediates. This study systematically evaluated the ORR activity of HCP and FCC cobalt core–shell cobalt/N‐doped carbon (Cobalt@NC) catalyst via theoretical and experimental studies. The electronic structure calculations using density functional theory (DFT) calculations revealed that the ORR activity of carbon layer can be improved by 1) switching the electrostatic potential in the electrical double layer due to the polarization induced at the carbon–cobalt interface and 2) modulating the electron population in the bonding orbital in the C–O bonds in an ORR. The results revealed that an O atom is bounded stronger to the outer NC shell with FCC Cobalt than HCP Cobalt, which hindered the desorption steps of OH*. Experimentally, plasma‐engineered HCP Cobalt@NC also showed remarkably advanced performance toward ORR compared to that FCC Cobalt@NC. The kinetic current density of HCP Cobalt@NC at 0.85 V versus RHE is calculated as 6.24 mA cm−2, which is six folds higher than FCC Cobalt@NC and even outperform 20 wt.% Pt/C. In a practical Aluminium‐air battery, HCP Cobalt@NC also exhibited slightly higher peak power density (110.57 mW cm−2) compared to 20 wt.% Pt/C.

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Boosting the activity of non-platinum group metal electrocatalyst for the reduction of oxygen via dual-ligated atomically dispersed precursors immobilized on carbon supports

Cited by 9 publications

References 55 publications

Architecting FeN_x on High Graphitization Carbon for High‐Performance Oxygen Reduction by Regulating d‐Band Center

Architecting FeN_x on High Graphitization Carbon for High‐Performance Oxygen Reduction by Regulating d‐Band Center

Electric field-induced phosphorization to prepare CoP@Biochar composites for efficient bifunctional oxygen electrocatalysis

Switching Electric Double Layer Potential by Phase Structure Control for Advanced Oxygen Reduction Reaction of Cobalt@Nitrogen Doped Carbon Core–Shell

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Boosting the activity of non-platinum group metal electrocatalyst for the reduction of oxygen via dual-ligated atomically dispersed precursors immobilized on carbon supports

Cited by 9 publications

References 55 publications

Architecting FeNx on High Graphitization Carbon for High‐Performance Oxygen Reduction by Regulating d‐Band Center

Architecting FeNx on High Graphitization Carbon for High‐Performance Oxygen Reduction by Regulating d‐Band Center

Electric field-induced phosphorization to prepare CoP@Biochar composites for efficient bifunctional oxygen electrocatalysis

Switching Electric Double Layer Potential by Phase Structure Control for Advanced Oxygen Reduction Reaction of Cobalt@Nitrogen Doped Carbon Core–Shell

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Architecting FeN_x on High Graphitization Carbon for High‐Performance Oxygen Reduction by Regulating d‐Band Center

Architecting FeN_x on High Graphitization Carbon for High‐Performance Oxygen Reduction by Regulating d‐Band Center