Cobalt-nickel alloys supported on Ti4O7 and embedded in N, S doped carbon nanofibers as an efficient and stable bifunctional catalyst for Zn-air batteries

Huang, Heming; Luo, Yangjun; Zhang, Li; Zhang, Huijuan; Wang, Yu

doi:10.1016/j.jcis.2022.10.047

Cited by 20 publications

(7 citation statements)

References 51 publications

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“…The O 1s spectrum (Figure 3c) displays two peaks centered at 531.35 eV and 530.23 eV, which are from the vacancy oxygen (O V ) and lattice oxygen (O L ) of Ti 4 O 7 , respectively. [28] After the introduction of Sn to the Ti 4 O 7 surface, the relative abundance of oxygen vacancy (O V ) characteristic peaks increased from 31.19 % to 41.07 %. In addition, the EPR intensity of the original Ti 4 O 7 , L-1 % SnÀ Ti 4 O 7 , and D-1 %SnÀ Ti 4 O 7 increased sequentially (Figure 3d), further confirming the increase in surface oxygen vacancies in Ti 4 O 7 crystals.…”

Section: Resultsmentioning

confidence: 99%

Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide

Sun,

Luo,

Dai

et al. 2024

Chemistry A European J

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Developing stable and highly selective two‐electron oxygen reduction reaction (2e− ORR) electrocatalysts for producing hydrogen peroxide (H2O2) is considered a major challenge to replace the anthraquinone process and achieve a sustainable green economy. Here, we doped Sn into Ti4O7 (D−Sn−Ti4O7) by simple polymerization post‐calcination method as a high‐efficiency 2e− ORR electrocatalyst. In addition, we also applied plain calcination after the grinding method to load Sn on Ti4O7 (L−Sn−Ti4O7) as a comparison. However, the performance of L−Sn−Ti4O7 is far inferior to that of the D−Sn−Ti4O7. D−Sn−Ti4O7 exhibits a starting potential of 0.769 V (versus the reversible hydrogen electrode, RHE) and a high H2O2 selectivity of 95.7 %. Excitingly, the catalyst can maintain a stable current density of 2.43 mA ⋅ cm−2 for 3600 s in our self‐made H‐type cell, and the cumulative H2O2 production reaches 359.2 mg ⋅ L−1 within 50,000 s at 0.3 V. The performance of D−Sn−Ti4O7 is better than that of the non‐noble metal 2e− ORR catalysts reported so far. The doping of Sn not only improves the conductivity but also leads to the lattice distortion of Ti4O7, further forming more oxygen vacancies and Ti3+, which greatly improves its 2e− ORR performance compared with the original Ti4O7. In contrast, since the Sn on the surface of L−Sn−Ti4O7 displays a synergistic effect with Tin+ (3≤n≤4) of Ti4O7, the active center Tin+ dissociates the O=O bond, making it more inclined to 4e− ORR.

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Section: Resultsmentioning

confidence: 99%

Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide

Sun,

Luo,

Dai

et al. 2024

Chemistry A European J

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“…The authors have cited additional references within the Supporting Information. [41][42][43][44][45][46][47][48][49][50][51][52]…”

Section: Methodsmentioning

confidence: 99%

CoFe Alloys Dispersed on Se, N Co‐Doped Graphitic Carbon as Efficient Bifunctional Catalysts for Zn‐Air Batteries

Dai,

Feng,

Luo

et al. 2023

Chemistry A European J

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The development of a stable and efficient non‐noble metal catalyst with both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is paramount to achieving the widespread application of Zn‐air batteries (ZABs), but remains a great challenge. Herein, a novel Co3Fe7 alloy nanoparticle dispersed on Se, N co‐doped graphitic carbon (denoted as CoFe/Se@CN) was prepared through a facile hydrothermal and pyrolysis process. The synthesized CoFe/Se@CN exhibits outstanding ORR and OER properties with an ultralow potential gap of 0.625 V, which is mainly attributed to the abundant porous structure, the rich structural defects formed by doping Se atoms, and the strong synergistic effects between the CoFe alloys and graphitic carbon nanosheet. Furthermore, the ZAB fabricated by CoFe/Se@CN shows a high peak power density of 160 mW cm‐2 and a large specific capacity of 802 mA h g‐1 with favorable cycling stability, outperforming that of Pt/C+RuO2. Our study offers a plausible strategy to explore bifunctional carbon‐based materials with efficient electrocatalytic properties for rechargeable ZABs.

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“…Therefore, the Co/Co 2 P@NCNTs catalysts exhibit high energy efficiency and long cycle life (1080 h) in zinc‐air batteries. In this section, we will summarize the effects of different interface catalysts such as metal@carbon, [ 224 ] alloy@carbon, [ 222 ] metal compound@carbon, [ 204 ] metal compounds@metal [ 233 ] and metal compounds@metal compounds [ 234 ] on the catalytic and electrochemical performance of metal‐air batteries.…”

Section: Recent Progress In Cnfs‐based Electrodes For Flexible Ees De...mentioning

confidence: 99%

Advanced Carbons Nanofibers‐Based Electrodes for Flexible Energy Storage Devices

Sun,

Han,

Wang

et al. 2023

Adv Funct Materials

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The rapid developments of the Internet of Things (IoT) and portable electronic devices have created a growing demand for flexible electrochemical energy storage (EES) devices. Nevertheless, these flexible devices suffer from poor flexibility, low energy density, and poor dynamic stability of power output during deformation, limiting their practical applications. Carbon nanofibers (CNFs) with high conductivity, good flexibility, and large‐scale preparation are regarded as promising electrodes for flexible EES devices. Based on the issues of current flexible EES devices, this review presents various strategies from the design of CNFs‐based electrodes to the fabrication of devices and overviews their applications in various flexible metal ion/air batteries (Li/Na/K‐ion batteries, Li‐S batteries, metal–air batteries, and other novel secondary batteries) and supercapacitors. Finally, the remaining challenges and perspectives on the CNFs‐based flexible EES devices are proposed to provide guidance for the researchers concentrating on high‐performance flexible EES devices.

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Cobalt-nickel alloys supported on Ti4O7 and embedded in N, S doped carbon nanofibers as an efficient and stable bifunctional catalyst for Zn-air batteries

Cited by 20 publications

References 51 publications

Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide

Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide

CoFe Alloys Dispersed on Se, N Co‐Doped Graphitic Carbon as Efficient Bifunctional Catalysts for Zn‐Air Batteries

Advanced Carbons Nanofibers‐Based Electrodes for Flexible Energy Storage Devices

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Cobalt-nickel alloys supported on Ti4O7 and embedded in N, S doped carbon nanofibers as an efficient and stable bifunctional catalyst for Zn-air batteries

Cited by 20 publications

References 51 publications

Sn Bulk Phase Doping and Surface Modification on Ti4O7 for Oxygen Reduction to Hydrogen Peroxide

Sn Bulk Phase Doping and Surface Modification on Ti4O7 for Oxygen Reduction to Hydrogen Peroxide

CoFe Alloys Dispersed on Se, N Co‐Doped Graphitic Carbon as Efficient Bifunctional Catalysts for Zn‐Air Batteries

Advanced Carbons Nanofibers‐Based Electrodes for Flexible Energy Storage Devices

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Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide

Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide