Atomically Dispersed CoN<sub>4</sub>/B, N-C Nanotubes Boost Oxygen Reduction in Rechargeable Zn–Air Batteries

Zhao, Ruopeng; Chen, Jiangyue; Chen, Zhijing; Jiang, Xian; Fu, Gengtao; Tang, Yawen; Jin, Wei; Lee, Jongmin; Huang, Shaoming

doi:10.1021/acsaem.0c00215

Cited by 55 publications

(26 citation statements)

References 66 publications

(89 reference statements)

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“…in future energy applications can be simply revealed from its high theoretical energy density values, in the range of 1086-11 140 Wh kg -1 . [5,6] Metal anodes, such as Zn, are earth abundant, cheap, safe for handling, and environmentally benign, favoring suitability of metal-air batteries for domestic and industrial applications. [7,8] Despite the intensive research being undertaken in the field of Zn-air batteries, major degradation issues remain with regards to the following: a) degradation of cathode materials-catalyst, carbon support and binders and b) morphological degradation of Zn anode during repeated cycles.…”

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confidence: 99%

Highly Efficient Oxygen Reduction Reaction Activity of N‐Doped Carbon–Cobalt Boride Heterointerfaces

Jose

Nsanzimana

et al. 2021

Advanced Energy Materials

205

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with thermodynamic oxygen to water conversion potential of 1.23 V (vs reversible hydrogen electrode (RHE)). [1] Especially so in recent years, platinum (Pt)-based catalysts are widely utilized as the state of the art catalyst for ORR. [2] However, they are known to suffer from ineluctable concerns with regards to scarcity, extreme cost, poor stability in long term usage and poisoning effects from methanol crossover. [3,4] The potential of rechargeable metal-air batteries (metal = Zn, Li, Al, Mg, etc.) in future energy applications can be simply revealed from its high theoretical energy density values, in the range of 1086-11 140 Wh kg -1 . [5,6] Metal anodes, such as Zn, are earth abundant, cheap, safe for handling, and environmentally benign, favoring suitability of metal-air batteries for domestic and industrial applications. [7,8] Despite the intensive research being undertaken in the field of Zn-air batteries, major degradation issues remain with regards to the following: a) degradation of cathode materials-catalyst, carbon support and binders and b) morphological degradation of Zn anode during repeated cycles. [9] Thus, in order to realize and leverage on the full potential of metal air batteries, the primary task would be to develop highly efficient and stable air cathodes that favor oxygen chemistry, mainly the ORR.Earth abundant metal-based catalysts, like metal oxides, [10] perovskites, [11] spinel type, [12] MXenes , [13,14] and mixed metal oxides [15,16] have been investigated as ORR catalysts. In addition, heteroatom-doped carbon structures containing metallic elements, like cobalt, nickel, and iron, have emerged as promising candidates to replace Pt. Despite intensive research in metal pnictogens and chalcogens over the years, there is a lack in exploration of metal-metalloids, such as amorphous metal borides for the ORR. Transition metal borides show superior oxygen evolution reaction (OER) performance in alkaline solution compared with noble metal catalysts, metal oxides, and metal alloy counterparts. [17] In contrast, transition metal borides undergo severe oxidation, limiting activities that may be derived and consequently, their ORR performance. [18] To date, only J. Ma et al [19] and K. Elumeeva et al [20] reported the usage of CoB as an ORR electrocatalyst, but the performance obtained was not satisfying with those the state-of-the-art catalysts. CoB nanosheets are expected to be highly beneficial for electrochemical applications (for example, ORR) because 1) the synthesis of metal borides by chemical reduction is fast and facile compared with the time consuming synthesis of many other Compositional and structural engineering of metal-metalloid materials can boost their electrocatalytic performance. Herein, a highly efficient and stable electrocatalytic system for the oxygen reduction reaction is obtained by creating heterointerfaces between N-doped carbon and cobalt boride nanosheets. Furthermore, a detailed investigation on the effect of annealing temperature as well as the amount of carbon ...

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confidence: 99%

Highly Efficient Oxygen Reduction Reaction Activity of N‐Doped Carbon–Cobalt Boride Heterointerfaces

Jose

Nsanzimana

et al. 2021

Advanced Energy Materials

205

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“…The Pt/GHSs isotherm hysteresis loops can be classified as type IV, indicating the presence of mesopores. [ 42 ] When PP 0 −1 > 0.9, the speed of nitrogen adsorption is accelerated, indicating the existence of some large pores, which is caused by the internal cavity of GHSs. The Brunauer–Emmett–Teller (BET) surface area of Pt/GHSs calculated from the nitrogen desorption isotherm was 299.1 m 2 g −1 .…”

Section: Resultsmentioning

confidence: 99%

Low‐Load Pt Nanoclusters Anchored on Graphene Hollow Spheres for Efficient Hydrogen Evolution

et al. 2020

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Efficient water splitting through electrocatalysis has been studied extensively in modern energy devices, whereas the development of catalysts with high activity and stability with low‐load Pt is still a great challenge. Through the spatial confinement effect and template method, herein, hollow graphene spheres with functionalized Pt nanoclusters (Pt/GHSs) are constructed and developed as effective electrocatalysts for the hydrogen evolution reaction (HER). Electrochemical tests show that Pt/GHSs exhibit a high electrocatalytic activity and stability compared with commercial Pt/C catalysts toward HER in alkaline media. The electric double‐layer capacitance value reaches 26.0 mF cm−2, indicating that Pt/GHSs have a large electrochemically active area. Meanwhile, the load of metal Pt in the Pt/GHSs is only one‐fifth of commercial Pt/C catalysts, which significantly reduces the production cost of the catalyst. Herein a new opportunity for the low‐cost mass production of efficient and stable catalysts for practical applications is provided.

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“…This catalyst showed good ORR performance with an E 1/2 of 0.87 V in 0.1 m KOH. [ 91 ] Jaouen and coworkers synthesized porphyrin‐like Co‐SAC and Fe‐SAC by pyrolyzing MOF and investigated the active sites in porphyrin‐like Co‐SAC by DFT calculations and their stability in acidic medium using operando XAFS. They found that there were two CoN 4 C 12 and O 2 ‐CoN 2 C 5 sites in a ratio of 53% to 47% distribution in porphyrin‐like Co‐SAC.…”

Section: Applications Of Porphyrin‐like Sacsmentioning

confidence: 99%

Recent Advancements of Porphyrin‐Like Single‐Atom Catalysts: Synthesis and Applications

et al. 2021

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Porphyrin, an active center in many biological enzymes, is an important environment‐friendly biomimetic catalyst, which shows high catalytic efficiency and selectivity. However, porphyrin has the disadvantages of decomposition, self‐polymerization and deactivation in catalysis, and unrecyclability in homogeneous catalysis, which limit its wide application in catalysis. With the development of single‐atom catalysis, it is found that porphyrin‐like single‐atom catalysts (SACs) mimic the porphyrin molecules and biological enzymes in many catalytic systems due to their high similarity to porphyrin. In contrast, porphyrin‐like single‐atom heterogeneous catalysts possess good recyclability compared with small‐molecule porphyrin homogeneous catalysts. Therefore, as an important family member of SACs, porphyrin‐like SACs are widely studied in various reactions. Herein, the synthesis methods for porphyrin‐like SACs and their applications in many important reactions, including electrochemical reactions and organic synthesis reactions, are summarized. Finally, the challenges and prospects of porphyrin‐like SACs in the further applications are provided.

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Atomically Dispersed CoN₄/B, N-C Nanotubes Boost Oxygen Reduction in Rechargeable Zn–Air Batteries

Cited by 55 publications

References 66 publications

Highly Efficient Oxygen Reduction Reaction Activity of N‐Doped Carbon–Cobalt Boride Heterointerfaces

Highly Efficient Oxygen Reduction Reaction Activity of N‐Doped Carbon–Cobalt Boride Heterointerfaces

Low‐Load Pt Nanoclusters Anchored on Graphene Hollow Spheres for Efficient Hydrogen Evolution

Recent Advancements of Porphyrin‐Like Single‐Atom Catalysts: Synthesis and Applications

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Atomically Dispersed CoN4/B, N-C Nanotubes Boost Oxygen Reduction in Rechargeable Zn–Air Batteries

Cited by 55 publications

References 66 publications

Highly Efficient Oxygen Reduction Reaction Activity of N‐Doped Carbon–Cobalt Boride Heterointerfaces

Highly Efficient Oxygen Reduction Reaction Activity of N‐Doped Carbon–Cobalt Boride Heterointerfaces

Low‐Load Pt Nanoclusters Anchored on Graphene Hollow Spheres for Efficient Hydrogen Evolution

Recent Advancements of Porphyrin‐Like Single‐Atom Catalysts: Synthesis and Applications

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Atomically Dispersed CoN₄/B, N-C Nanotubes Boost Oxygen Reduction in Rechargeable Zn–Air Batteries