Regulated coordination environment of Ni single atom catalyst toward high-efficiency oxygen electrocatalysis for rechargeable Zinc-air batteries

Luo, Fang; Zhu, Jianbing; Ma, Shuangxiu; Li, Min; Xu, Ruizhi; Zhang, Quan; Yang, Zehui; Qu, Konggang; Cai, Weiwei; Chen, Zhongwei

doi:10.1016/j.ensm.2020.12.006

Cited by 97 publications

(52 citation statements)

References 49 publications

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“…In their first derivative spectra (Figure S6), the maximum for FeNi/NC exhibits positive shifts compared to Fe/NC or Ni/NC, implying the metal sites in FeNi/NC are more positively charged. Similar, more positively charged bi-metal SAC was reported before, 23,24 and the decreased electron densities in metal sites were attributed to the spontaneously axial adsorption of oxygenrelated species. Since the absorption towards oxygen species on Fe sites is too strong, the decreased electron density may alleviate the strong absorption and fast the catalytic processes.…”

Section: Resultssupporting

confidence: 83%

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Highly Dispersive Metal Atoms Anchored on Carbon Matrix Obtained by Direct Rapid Pyrolysis of Metal Complexes

Huang

Wang

et al. 2022

CCS Chem

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Section: Resultssupporting

confidence: 83%

“…(c): ORR LSV curves before and after the ADT test for ORR at 0.6-1.0 V. (d): OER LSV curves before and after the ADT test for ORR at 1.2-1.6 V. (e): The metal redox peaks were obtained from square wave voltammetry. (f) Comparisons of the OER and ORR bifunctional activities 23,[37][38][39][40][41][42][43][44][45][46][47][48].…”

mentioning

confidence: 99%

Highly Dispersive Metal Atoms Anchored on Carbon Matrix Obtained by Direct Rapid Pyrolysis of Metal Complexes

Huang

Wang

et al. 2022

CCS Chem

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“…No nanoparticles or clusters can be observed from the high‐resolution TEM (HRTEM) image (Figure 1f), which means that Fe atoms are atomically dispersed on the N doped carbon nanosheets. And the lattice distance of Fe−N−C/700 (Figure 1g) is about ∼0.34 nm, corresponding to the (002) plane of graphite carbon [29] . The selected area electron pattern (SAED) of Fe−N−C/700 exhibited two typical diffraction rings (inset in Figure 1g), which were associated with the (100) and (002) planes of the graphite carbon materials [30] .…”

Section: Resultsmentioning

confidence: 98%

Synthesis of Tangled Iron‐Nitrogen Co‐doped Carbon Nanosheets through a Dopamine Coordination Strategy for the Oxygen Reduction Reaction

Qin

Zhu

et al. 2021

ChemElectroChem

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Developing efficient, economical, and durable transition metal atom‐dispersed catalysts to boost the sluggish oxygen reduction reactions (ORRs) is crucial for the practical metal‐air batteries. Herein, a facile dopamine‐coordination strategy was developed to obtain tangled Fe, N co‐doped ultrathin carbon nanosheets (donated as tangled Fe−N−C nanosheets), which can be utilized as high‐performance ORR electrocatalysts. Benefited from the unique hierarchical porous structures and abundant Fe−Nx active sites, the tangled Fe−N−C nanosheets exhibited excellent ORR activity in alkaline medium with more positive half‐wave potential (0.88 V vs. RHE) than 20 wt % Pt/C (0.84 V vs. RHE). Meanwhile, the tangled Fe−N−C nanosheets exhibit excellent long‐term stability and good tolerance to methanol crossover. When applying the Fe−N−C nanosheets as the cathode catalyst for primary zinc‐air batteries (ZABs), the assembled cells exhibit high open circuit voltage (∼1.43 V), high peak power density (∼89 mW cm−2) and large specific capacity of 801 mA h g−1.

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Section: Oxygen Reduction Reactionsmentioning

confidence: 99%

“…www.advsustainsys.com monatomic Ni, thereby increasing the binding affinity of the monatomic Ni sites. [67] MN 4 is the structure recognized as the main active center for ORR catalysis. Thus, the Fe SA and Ni SA diatom provide synergistic catalytic performance that is much higher than that of other SA.…”

Section: Oxygen Reduction Reactionsmentioning

confidence: 99%

Metal‐Organic‐Framework‐Based Single‐Atomic Catalysts for Energy Conversion and Storage: Principles, Advances, and Theoretical Understandings

Yang

Yan

Kong

et al. 2021

Advanced Sustainable Systems

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Metal NPs have promising applications in catalysis. Metal active sites are usually located in the crosssections, edges, and corners of crystals and, depending on their locations, the crystals exhibit different catalytic activities. [3] Achieving maximum metal utilization by reducing the size of metal NPs to the atomic level is an effective method of improving the catalytic activity of metal catalysts. It has been found that singleatom catalysts have greatly improved catalytic performance, activity, and selectivity, and that metal single-atom catalysts (SACs) have high electrocatalytic activity and stability and are an effective strategy for achieving cost-effective catalysts for fuel cell applications. [4] An SAC was first proposed by Zhang et al. in 2011 and is defined as a carrier consisting of only isolated single atomic active sites. [1b] In recent years, SACs have emerged as having great potential for development. Their maximum atomic utilization efficiency and excellent performance have provided excellent catalytic performance in a variety of important reactions. [5] In addition, SACs have great potential in identifying and modulating the structure of the active canter to improve catalytic performance. SACs can minimize the use of noble metals and are highly advantageous in achieving 100% atomic utilization efficiency. Due to the single-atom nature of their active sites, SACs provide enhanced catalytic activity and have attracted much research attention in recent years. To avoid the agglomeration of single atoms and to achieve the separation and isolation of individual atoms, many strategies have been reported for synthesizing single atoms, such as wet chemical methods, electrochemical deposition, chemical vapor deposition, and high-temperature pyrolysis. However, it is challenging to maintain a high loading while avoiding agglomeration of individual atoms during the synthesis process. If the metal loading is too high, the high surface energy of single atoms tends to cause agglomeration of atoms. Therefore, the homogeneous dispersion and atomic size of active sites have been the focus of scientific research for decades. In general, the most common approach to preparing single-atom catalysts is to find suitable carriers to anchor single-atom metal sites (SMSs), [6] e.g., as active complexes, cations, or metal atoms) on the surface of heterogeneous carriers such as metals, metal oxides, silica, or carbon materials. However, these anchor sites are limited and disordered, leadingIn recent years, the development of alternative energy-saving, efficient, and clean catalysts for various electrochemical reactions has attracted increasing research attention. Among the various types of catalysts, singleatom catalysts (SACs) have unique properties. However, individual atoms are prone to agglomeration due to their high surface energy, which poses a major challenge to the development of SACs. Metal-organic frameworks (MOFs) have the advantages of high porosity and specific surface area, and MOF materials can be ideal ca...

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Regulated coordination environment of Ni single atom catalyst toward high-efficiency oxygen electrocatalysis for rechargeable Zinc-air batteries

Cited by 97 publications

References 49 publications

Highly Dispersive Metal Atoms Anchored on Carbon Matrix Obtained by Direct Rapid Pyrolysis of Metal Complexes

Highly Dispersive Metal Atoms Anchored on Carbon Matrix Obtained by Direct Rapid Pyrolysis of Metal Complexes

Synthesis of Tangled Iron‐Nitrogen Co‐doped Carbon Nanosheets through a Dopamine Coordination Strategy for the Oxygen Reduction Reaction

Metal‐Organic‐Framework‐Based Single‐Atomic Catalysts for Energy Conversion and Storage: Principles, Advances, and Theoretical Understandings

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