Cage-confinement pyrolysis route to size-controlled molybdenum-based oxygen electrode catalysts: From isolated atoms to clusters and nanoparticles

Kou, Zongkui; Zang, Wenjie; Ma, Yuanyuan; Pan, Zhenghui; Mu, Shichun; Gao, Xiaorui; Tang, Baoshan; Xiong, Mo; Zhao, Xin; Cheetham, Anthony K.; Zheng, Lirong; Wang, John

doi:10.1016/j.nanoen.2019.104288

Cited by 96 publications

(54 citation statements)

References 40 publications

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“…However, their shortage and high cost as well as rapid deactivation of these precious metals, always limit their widespread large-scale application. 6 The various earth-abundant and cost-effective transition metal-based catalysts such as hydroxide/oxide, 4,6 phosphide, 7 chalcogenide, [8][9][10] and carbides, [11][12][13][14] have been explored as OER electrocatalyst due to their high catalytic performance along with better stability.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of nickel hydroxide/reduced graphene oxide composite thin films for water splitting application

et al. 2020

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Facile synthesis of highly efficient and low-cost electrocatalyst for oxygen evolution reaction (OER) is important for large-scale hydrogen production. Herein, nickel hydroxide/reduced graphene oxide (Ni(OH) 2 /rGO) composite thin film was fabricated using dip-coating followed by electrodeposition method on Ni foam substrate at room temperature. The deposited composite film shows amorphous nature with ultra-thin Ni(OH) 2 nanosheets vertically coated on rGO surface, which provides large electrochemical surface area and abundant catalytically active sites. It exhibits a low overpotential of 260 mV @10 mA cm −2 as compared to the pristine electrodes and excellent long-term stability up to 20 hours in 1 M KOH solution. The electrochemical active surface area and Tafel slope of the composite electrode are 20.2 mF cm −2 and 35 mV dec −1 , respectively. The superior water oxidation performance is a result of high catalytically active sites and improved conductivity of the composite electrode.

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Section: Introductionmentioning

confidence: 99%

Synthesis of nickel hydroxide/reduced graphene oxide composite thin films for water splitting application

et al. 2020

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“…23,24 For example, Kou and Wang et al synthesized single Mo sites with an Mo 1 N 1 C 2 local coordination structure in nitrogen-doped carbons and used them as efficient bifunctional OER/ORR and nitrogen reduction reaction catalysts. 25,26 The same authors nicely demonstrated that the single Co atoms which are coordinated with three Mo atoms in the 2D molybdenum carbide nanosheets served as effective active sites for both the OER and the HER. 27 An alternative approach to obtain SACs with a designed structure is to use heterogeneous organic supports with high design exibility.…”

Section: Kazuhide Kamiya Received Hismentioning

confidence: 94%

Selective single-atom electrocatalysts: a review with a focus on metal-doped covalent triazine frameworks

Kamiya

2020

Chem. Sci.

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“…[2,51,52] The particle size of the catalysts is also highly relevant to their catalytic activities. [53][54][55][56] When the catalyst size is reduced from micrometer-scale to nanoscale, the physical and chemical properties of the catalysts change significantly due to quantum effects, and consequently affect the behavior and properties of catalysts such as electrochemically catalytic reactivity, surface area, electrical conductivity, and structures. Seo et al [57] synthesized carbon nanotube (CNT)-supported cobalt oxide nanoparticles (NPs) (CoO x /CNTs) with the size distribution of 3-10 nm, and investigated their size dependency for bifunctional oxygen catalysis.…”

Section: Defect Chemistry Of Bifunctional Electrocatalystmentioning

confidence: 99%

Defect Electrocatalysts and Alkaline Electrolyte Membranes in Solid‐State Zinc–Air Batteries: Recent Advances, Challenges, and Future Perspectives

Zhang

et al. 2020

Small Methods

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Rechargeable zinc–air batteries (ZABs) have attracted much attention due to their promising capability for offering high energy density while maintaining a long operational lifetime. One of the biggest challenges in developing all‐solid‐state ZABs is to design suitable bifunctional air‐electrodes, which can efficiently catalyze the key oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) electrochemical processes. The other one is to develop robust electrolyte membranes with high ionic conductivity and superb water retention capability. In this review, an in‐depth discussion of the challenges, mechanisms, and design strategies for the defect electrocatalyst and the electrolyte membrane in all‐solid‐state ZABs will be offered. In particular, the crucial defect engineering strategies to tune the ORR/OER catalysts are summarized, including direct controllable strategies: 1) atomically dispersed metal sites control, 2) vacancy defects control, and 3) lattice‐strain control, and the indirect strategies: 4) crystallographic structure control and 5) metal–carbon support interaction control. Moreover, the most recent progress in designing electrolyte membranes, including polyvinyl alcohol‐based membranes and gel polymer electrolyte membranes, is presented. Finally, the perspectives are proposed for rational design and fabrication of the desired air electrode and electrolyte membrane to improve the performance and prolong the lifetime of all‐solid‐state ZABs.

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Cage-confinement pyrolysis route to size-controlled molybdenum-based oxygen electrode catalysts: From isolated atoms to clusters and nanoparticles

Cited by 96 publications

References 40 publications

Synthesis of nickel hydroxide/reduced graphene oxide composite thin films for water splitting application

Synthesis of nickel hydroxide/reduced graphene oxide composite thin films for water splitting application

Selective single-atom electrocatalysts: a review with a focus on metal-doped covalent triazine frameworks

Defect Electrocatalysts and Alkaline Electrolyte Membranes in Solid‐State Zinc–Air Batteries: Recent Advances, Challenges, and Future Perspectives

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