Co single-atom anchored on Co3O4 and nitrogen-doped active carbon toward bifunctional catalyst for zinc-air batteries

Zhong, Xiongwei; Yi, Wendi; Qu, Yuanju; Zhang, Luozheng; Bai, Haoyu; Zhu, Yuanmin; Wan, Jing; Shi, Chen; Yang, Ming; Huang, Li; Gu, Meng; Pan, Hui; Xu, Baomin

doi:10.1016/j.apcatb.2019.118188

Cited by 182 publications

(80 citation statements)

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“…In view of the ultrathin (≈2 nm) nature of these Fe‐Co 3 O 4 nanosheets, all doped Fe atoms should exist near the surface. [ 47,48 ] It is thus easy to understand that the doping of even small amount of Fe atoms will have profound enhancement in electrocatalytic activity as suggested by the DFT results.…”

Section: Figurementioning

confidence: 99%

Metal Atom‐Doped Co₃O₄ Hierarchical Nanoplates for Electrocatalytic Oxygen Evolution

et al. 2020

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Electrocatalysts based on hierarchically structured and heteroatom‐doped non‐noble metal oxide materials are of great importance for efficient and low‐cost electrochemical water splitting systems. Herein, the synthesis of a series of hierarchical hollow nanoplates (NPs) composed of ultrathin Co3O4 nanosheets doped with 13 different metal atoms is reported. The synthesis involves a cooperative etching−coordination−reorganization approach starting from zeolitic imidazolate framework‐67 (ZIF‐67) NPs. First, metal atom decorated ZIF‐67 NPs with unique cross‐channels are formed through a Lewis acid etching and metal species coordination process. Afterward, the composite NPs are converted to hollow Co3O4 hierarchical NPs composed of ultrathin nanosheets through a solvothermal reaction, during which the guest metal species is doped into the octahedral sites of Co3O4. Density functional theory calculations suggest that doping of small amount of Fe atoms near the surface of Co3O4 can greatly enhance the electrocatalytic activity toward the oxygen evolution reaction (OER). Benefiting from the structural and compositional advantages, the obtained Fe‐doped Co3O4 hierarchical NPs manifest superior electrocatalytic performance for OER with an overpotential of 262 mV at 10 mA cm−2, a Tafel slope of 43 mV dec−1, and excellent stability even at a high current density of 100 mA cm−2 for 50 h.

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Section: Figurementioning

confidence: 99%

Metal Atom‐Doped Co₃O₄ Hierarchical Nanoplates for Electrocatalytic Oxygen Evolution

et al. 2020

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“…Metal-air batteries have attracted much attention due to their low price and high theoretical energy density. [11,[123][124][125][126][127] The metal-air batteries currently studied mainly include: zinc-air batteries (Zn-air battery), lithium-air batteries (LiÀ O 2 /air), magnesium-air batteries and aluminum-air batteries. Zn-air batteries have attracted wide attention due to high safety and high theoretical energy density (1086 Wh kg À 1 ), and are considered to be the battery devices closest to commercial applications.…”

Section: Metal-air Batterymentioning

confidence: 99%

Recent Progress on Defect‐rich Transition Metal Oxides and Their Energy‐Related Applications

Wang

Liang

Zheng

et al. 2020

Chemistry An Asian Journal

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The applications of many energy-related electrochemical energy conversion and storage devices are changing with each passing day. Oxygen evolution reaction (OER), hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) are the key steps in the commercial application of these energy conversion/storage equipment. Defect-rich transition metal oxides (TMOs), such as Co, Mn, Fe, Ni, etc., have always been one of the most promising electrocatalysts, which are cheap, easy to obtain, high in catalytic activity and stable during electrocatalysis. In this review, we first introduce the definition, classification, characteristics, and construction of defects. Then, the latest developments of defect-rich TMO electrocatalysts in electro-catalysis and energy conversion storage device is summarized. Furthermore, the relationship between defects and activity and the potential mechanism are also discussed. The defects in defect-rich TMOs can adjust the surface/interface electronic structure of the electrocatalyst, change the adsorption energy of the intermediate product, or increase the intrinsic catalytic activity of active sites, which are beneficial for enhanced catalytic performance. Finally, the current challenges and prospects of defect-rich TMO electrocatalysts are proposed. Therefore, the introduction of defects in TMO will be a potential strategy for the rational design of high-performance electrocatalysts in the future.

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“…Fortunately, TM compounds anchored on nanocarbon material have shown excellent electrocatalytic activity and durability in ORR and OER, due to their good electrical conductivity, superior chemical stability, high surface area, strong synergies between TM compounds and heteroatom-doped nanocarbons. [89][90][91] The role of oxygen vacancies in the electrochemical performance of Co 3 O 4 has been extensively studied. [92][93][94][95][96] DFT calculations showed that oxygen vacancies produce a new defect state located in the bandgap of Co 3 O 4 , which easily excites two electrons in the defect state and leads to enhanced conductivity and superior electrochemical activity (Figure 9a).…”

Section: Tm-based Nanoparticles Supported On the Heteroatom-doped Carbonmentioning

confidence: 99%

“…The assembly of TM compounds (e. g., oxides, alloys, hydroxides, sulfides, phosphates, nitrides, carbides, perovskites and spinels) on the heteroatoms‐doped carbon by chemical attachment and electrical coupling is another feasible way to introduce TM into carbon materials [68,88–108] . TM compounds have been widely reported as OER electrocatalysts [76,109] .…”

Section: The Interaction Of Heteroatoms Doped Carbon and Tmsmentioning

confidence: 99%

Defect Engineering of Carbon‐based Electrocatalysts for Rechargeable Zinc‐air Batteries

Dong

Zhang

et al. 2020

Chemistry An Asian Journal

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Rechargeable zinc-air batteries (ZABs) are considered as one of the most promising electrochemical energy devices due to their various unique advantages. Oxygen electrocatalysis, involving the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), determines the overall performance of zinc-air batteries. Therefore, the development of highly efficient bifunctional ORR/OER catalysts is critical for the large-scale application of ZABs. Carbonbased nanomaterials have been widely reported to be efficient electrocatalysts toward both ORR and OER. The enhanced activity of these electrocatalysts are usually attributed to different doping defects, synergistic effects and even the intrinsic carbon defects. Herein, an overview of the defect engineering in carbon-based electrocatalysts for ORR and OER is provided. The different types of intrinsic carbon defects and strategies for the generation of other defects in carbon-based electrocatalysts are presented. The interaction of heteroatoms doped carbon and transition metals (TMs) is also explored. In the end, the existing challenges and future perspectives on defect engineering are discussed.

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Co single-atom anchored on Co3O4 and nitrogen-doped active carbon toward bifunctional catalyst for zinc-air batteries

Cited by 182 publications

References 50 publications

Metal Atom‐Doped Co₃O₄ Hierarchical Nanoplates for Electrocatalytic Oxygen Evolution

Metal Atom‐Doped Co₃O₄ Hierarchical Nanoplates for Electrocatalytic Oxygen Evolution

Recent Progress on Defect‐rich Transition Metal Oxides and Their Energy‐Related Applications

Defect Engineering of Carbon‐based Electrocatalysts for Rechargeable Zinc‐air Batteries

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Co single-atom anchored on Co3O4 and nitrogen-doped active carbon toward bifunctional catalyst for zinc-air batteries

Cited by 182 publications

References 50 publications

Metal Atom‐Doped Co3O4 Hierarchical Nanoplates for Electrocatalytic Oxygen Evolution

Metal Atom‐Doped Co3O4 Hierarchical Nanoplates for Electrocatalytic Oxygen Evolution

Recent Progress on Defect‐rich Transition Metal Oxides and Their Energy‐Related Applications

Defect Engineering of Carbon‐based Electrocatalysts for Rechargeable Zinc‐air Batteries

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Product

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Metal Atom‐Doped Co₃O₄ Hierarchical Nanoplates for Electrocatalytic Oxygen Evolution

Metal Atom‐Doped Co₃O₄ Hierarchical Nanoplates for Electrocatalytic Oxygen Evolution