Distinguished Zn,Co-Nx-C-Sy active sites confined in dentric carbon for highly efficient oxygen reduction reaction and flexible Zn-air Batteries

Liu, Dexin; Wang, Bo; Li, Hongguan; Huang, Shan; Liu, Minmin; Wang, Jing; Wang, Qingjie; Zhang, Jiujun; Zhao, Yufeng

doi:10.1016/j.nanoen.2019.01.011

Cited by 210 publications

(161 citation statements)

References 37 publications

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“…Recently, transition‐metal–nitrogen–carbon nanocomposites have emerged as the substitutes to the bifunctional noble‐metal oxygen electrocatalysts . Especially, metal–organic frameworks (MOFs) are considered to be promising due to the abundant carbon, nitrogen, and transition‐metals along with the uniform porous structure .…”

Section: Introductionmentioning

confidence: 99%

2D Nitrogen‐Doped Carbon Nanotubes/Graphene Hybrid as Bifunctional Oxygen Electrocatalyst for Long‐Life Rechargeable Zn–Air Batteries

Deng

Chen

et al. 2019

Adv Funct Materials

207

140

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The rational construction of efficient bifunctional oxygen electrocatalysts is of immense significance yet challenging for rechargeable metal-air batteries. Herein, this work reports a metal-organic framework derived 2D nitrogendoped carbon nanotubes/graphene hybrid as the efficient bifunctional oxygen electrocatalyst for rechargeable zinc-air batteries. The as-obtained hybrid exhibits excellent catalytic activity and durability for the oxygen electrochemical reactions due to the synergistic effect by the hierarchical structure and heteroatom doping. The assembled rechargeable zinc-air battery achieves a high power density of 253 mW cm −2 and specific capacity of 801 mAh g Zn −1 with excellent cycle stability of over 3000 h at 5 mA cm −2 .Moreover, the flexible solid-state rechargeable zinc-air batteries assembled by this hybrid oxygen electrocatalyst exhibits a high discharge power density of 223 mW cm −2 , which can power 45 light-emitting diodes and charge a cellphone. This work provides valuable insights in designing efficient bifunctional oxygen electrocatalysts for long-life metal-air batteries and related energy conversion technologies.

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Section: Introductionmentioning

confidence: 99%

2D Nitrogen‐Doped Carbon Nanotubes/Graphene Hybrid as Bifunctional Oxygen Electrocatalyst for Long‐Life Rechargeable Zn–Air Batteries

Deng

Chen

et al. 2019

Adv Funct Materials

207

140

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“…The specific surface area and porosity of PTC‐P10 are larger than that of ZTOF‐1‐P10 and ATC‐P10, which indicates that Pt modifying can increase the specific surface area and porosity of the catalyst. Therefore, compared with ZTOF‐1‐P10 and ATC‐P10, PTC‐P10 has more TiO 2– x active sites and higher utilization of light …”

Section: Resultsmentioning

confidence: 99%

Pt Modified TiO₂_–_x/C Composites with Metal‐organic Frameworks as Precursors for Photodegradation of Organic Dye

Fan

2020

Zeitschrift anorg allge chemie

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A series of Pt modified TiO2–x/C composites with higher specific surface area were obtained by using a Zn‐Ti heterometallic metal‐organic framework (MOF) as the precursor. The photocatalytic activities of these composites were studied by methylene blue (MB) as a representative organic pollutant. The chemical composition and porosity of these composites can be adjusted by changing the pyrolysis temperature. Among them, the sample being pyrolyzed at 1000 °C (PTC‐P10) showed excellent photocatalytic performance, and its rate constant of degradation of MB was higher than that of ATC‐P10 (Ag modified TiO2–x/C composites) due to the rapid capture of electrons and the expansion of the photoresponse range caused by Pt modifying. This work represents a novel approach towards Pt modified TiO2–x/C composites as photocatalysts.

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“…Different from the mono active sites, binuclear active centers (BACs) contain a metal–metal bond between the two active centers (see Figure ) . Dual‐site catalysts in which the two metal centers are connected by nitrogen or other nonmetal atoms (Figure C and D) are excluded from the current discussion . The two active centers can be the same or different elements .…”

Section: Metal‐atom‐doped Carbon Materialsmentioning

confidence: 99%

Intrinsic Effect of Carbon Supports on the Activity and Stability of Precious Metal Based Catalysts for Electrocatalytic Alcohol Oxidation in Fuel Cells: A Review

Zhang

Xiang

et al. 2020

ChemSusChem

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Electrocatalyst supports, in particular carbonaceous materials, play critical roles in the electrocatalytic activity and stability of precious metal group (PMG)‐based catalysts such as Pt, Pd, and Au for the electrochemical alcohol oxidation reaction (AOR) of fuels such as methanol and ethanol in polymer electrolyte membrane fuel cells (PEMFCs). Carbonaceous supports such as high surface area carbon provide electronic contact throughout the catalyst layer, isolate PMG nanoparticles (NPs) to maintain high electrochemical surface area, and provide hydrophobic properties to avoid flooding of the catalyst layer by liquid water produced. Compared to high surface area carbon, PMG catalysts supported on 1D and 2D carbon materials such as graphene and carbon nanotubes show enhanced activity and durability due to the intrinsic effect of the underlying carbonaceous supports on the electronic states of PMG NPs. The modification of the electronic environment, in particular the d‐band centers of PMG NPs, weakens the adsorption of AOR intermediates, facilitates breaking of the C−C bonds, and thus enhances the electrocatalytic activity of PMG catalysts. The doping of heteroatoms further facilitates the electrocatalytic activity for the AOR through the structural, bifunctional, and electronic effects, in addition to the enhanced dispersion of PMG NPs in the carbon support. The prospects for the development of effective PMG‐based catalysts for high‐performance alcohol‐fuel‐based PEMFCs is discussed.

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Distinguished Zn,Co-Nx-C-Sy active sites confined in dentric carbon for highly efficient oxygen reduction reaction and flexible Zn-air Batteries

Cited by 210 publications

References 37 publications

2D Nitrogen‐Doped Carbon Nanotubes/Graphene Hybrid as Bifunctional Oxygen Electrocatalyst for Long‐Life Rechargeable Zn–Air Batteries

2D Nitrogen‐Doped Carbon Nanotubes/Graphene Hybrid as Bifunctional Oxygen Electrocatalyst for Long‐Life Rechargeable Zn–Air Batteries

Pt Modified TiO₂_–_x/C Composites with Metal‐organic Frameworks as Precursors for Photodegradation of Organic Dye

Intrinsic Effect of Carbon Supports on the Activity and Stability of Precious Metal Based Catalysts for Electrocatalytic Alcohol Oxidation in Fuel Cells: A Review

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Distinguished Zn,Co-Nx-C-Sy active sites confined in dentric carbon for highly efficient oxygen reduction reaction and flexible Zn-air Batteries

Cited by 210 publications

References 37 publications

2D Nitrogen‐Doped Carbon Nanotubes/Graphene Hybrid as Bifunctional Oxygen Electrocatalyst for Long‐Life Rechargeable Zn–Air Batteries

2D Nitrogen‐Doped Carbon Nanotubes/Graphene Hybrid as Bifunctional Oxygen Electrocatalyst for Long‐Life Rechargeable Zn–Air Batteries

Pt Modified TiO2–x/C Composites with Metal‐organic Frameworks as Precursors for Photodegradation of Organic Dye

Intrinsic Effect of Carbon Supports on the Activity and Stability of Precious Metal Based Catalysts for Electrocatalytic Alcohol Oxidation in Fuel Cells: A Review

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Pt Modified TiO₂_–_x/C Composites with Metal‐organic Frameworks as Precursors for Photodegradation of Organic Dye