Modulierung der elektronischen Strukturen anorganischer Nanomaterialien für eine effiziente elektrokatalytische Wasserspaltung

Du, Xuesen; Huang, Jianwen; Yan, Yan; Wu, Chunyang; Hu, Yin; Yan, Chaoyi; Lei, Tianyu; Chen, Wei; Fan, Cong; Xiong, Jie

doi:10.1002/ange.201810104

Cited by 34 publications

(5 citation statements)

References 181 publications

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“…As a result, the electronic structure of Ni and Co atoms for a-NiCo/NC could be effectively regulated with more antibonding states which would enable the active sites to have a stronger binding ability with reactive intermediates, thus facilitating the OER. [55,56] The free energies of each elementary step are calculated to obtain the rate-determining step…”

Section: Angewandte Chemiementioning

confidence: 99%

Highly Efficient Electrocatalytic Oxygen Evolution Over Atomically Dispersed Synergistic Ni/Co Dual Sites

Pei

Zhang

et al. 2022

Angewandte Chemie

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Single‐atom catalysts (SACs) are being pursued as economical electrocatalysts. However, their low active‐site loading, poor interactions, and unclear catalytic mechanism call for significant advances. Herein, atomically dispersed Ni/Co dual sites anchored on nitrogen‐doped carbon (a‐NiCo/NC) hollow prisms are rationally designed and synthesized. Benefiting from the atomically dispersed dual‐metal sites and their synergistic interactions, the obtained a‐NiCo/NC sample exhibits superior electrocatalytic activity and kinetics towards the oxygen evolution reaction. Moreover, density functional theory calculations indicate that the strong synergistic interactions from heteronuclear paired Ni/Co dual sites lead to the optimization of the electronic structure and the reduced reaction energy barrier. This work provides a promising strategy for the synthesis of high‐efficiency atomically dispersed dual‐site SACs in the field of electrochemical energy storage and conversion.

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Section: Angewandte Chemiementioning

confidence: 99%

Highly Efficient Electrocatalytic Oxygen Evolution Over Atomically Dispersed Synergistic Ni/Co Dual Sites

Pei

Zhang

et al. 2022

Angewandte Chemie

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“…Addition of external field onto MoS 2 , according to the principles of band theory, is another effective route to boost the carrier transport and increase the bulk conductivity of MoS 2 catalyst . Very recently, field effect was used to improve HER catalysis of MoS 2 .…”

Section: Emerging Molybdenum‐based Electrocatalystsmentioning

confidence: 99%

The Holy Grail in Platinum‐Free Electrocatalytic Hydrogen Evolution: Molybdenum‐Based Catalysts and Recent Advances

Zhuang

Huang

et al. 2019

ChemElectroChem

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Electrochemical water splitting towards hydrogen production is of significance for our sustainable development in the future. Although platinum-group catalysts possess the highest activity for hydrogen evolution reaction (HER), their scarcity renders potential applications commercially inviable and thus many efforts are constantly devoted into this arena. Over the last decade, various molybdenum-based catalysts, covering, for example, sulfides, carbides, phosphides, borides, nitrides and alloys, have been found to be very active, and are rapidly becoming popular. In this Review, we comprehensively summarize this topic of emerging Mo-based catalysts for HER by stating and discussing their catalytic mechanisms, synthesis methods, optimization tactics, and promise to outbalance platinum-based systems. We use typical examples from recent advances of various Mo-based catalysts to elaborate their merits and shortcomings for HER, as well as how to further optimize their activities, varying from surface area maximization and active site exposure to electron/atom/molecule/phase-level manipulation, and to external field-assisted activity enhancement. We also propose various challenges and perspectives for these emerging Mo-based catalysts and discuss how these challenges might be addressed.

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“…However, the scarcity of active, stable, and affordable electrocatalysts for oxygen evolution reaction (OER) in acidic conditions is a significant challenge for widespread commercialization of acidic water splitting [3]. Among the most advanced OER electrodes for acidic conditions are those based on Ir oxide and Ru oxide materials [4,5]. Compared to Ir-based materials, Ru oxide-based materials have a lower cost and higher activity, especially those with a rutile structure, such as RuO 2 [6].…”

Section: Introductionmentioning

confidence: 99%

Transition metal-doped V-shaped RuO₂ 103 nanotwins as highly active electrocatalysts for enhanced oxygen evolution in acidic media

Zhao,

Wu,

Tang

2023

J. Phys. D: Appl. Phys.

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Efficient and stable catalysts for the oxygen evolution reaction (OER) in acidic environments are essential for hydrogen production through electrolysis. The paper reported the transition metal-doped RuO2 103 nanotwins (RuO2 103-NTs), as cost-effective and high-performance catalysts for acidic OER. The MRu-VO defect models were constructed by introducing transition metal (Ag, Mn, Fe, Co, Cu, and Zn) doped surfaces. Thereinto, the AgRu-VO doped structure exhibited remarkable OER activity in acidic conditions, achieving a reduced overpotential of 0.37 eV. Furthermore, we investigated the synergistic effect of the Ag and oxygen vacancies (VO) in conjunction with grain boundaries. Above results revealed that an increase in the content of Ag and VO resulted in a decrease in structural stability, leading to a more disordered structure. By analyzing the adsorption energy, energy band center and charge transfer in bimetallic-doped NTs, we observed that the presence of MRu-AgRu-VO (M = Mn, Co, Fe) significantly promotes the positive shift of d band center and the increase of charge transfer. This effect ultimately led to a decrease in the overpotential of the rate-determining step to 0.27 eV, thereby enhancing the intrinsic activity of RuO2.

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Modulierung der elektronischen Strukturen anorganischer Nanomaterialien für eine effiziente elektrokatalytische Wasserspaltung

Cited by 34 publications

References 181 publications

Highly Efficient Electrocatalytic Oxygen Evolution Over Atomically Dispersed Synergistic Ni/Co Dual Sites

Highly Efficient Electrocatalytic Oxygen Evolution Over Atomically Dispersed Synergistic Ni/Co Dual Sites

The Holy Grail in Platinum‐Free Electrocatalytic Hydrogen Evolution: Molybdenum‐Based Catalysts and Recent Advances

Transition metal-doped V-shaped RuO₂ 103 nanotwins as highly active electrocatalysts for enhanced oxygen evolution in acidic media

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Modulierung der elektronischen Strukturen anorganischer Nanomaterialien für eine effiziente elektrokatalytische Wasserspaltung

Cited by 34 publications

References 181 publications

Highly Efficient Electrocatalytic Oxygen Evolution Over Atomically Dispersed Synergistic Ni/Co Dual Sites

Highly Efficient Electrocatalytic Oxygen Evolution Over Atomically Dispersed Synergistic Ni/Co Dual Sites

The Holy Grail in Platinum‐Free Electrocatalytic Hydrogen Evolution: Molybdenum‐Based Catalysts and Recent Advances

Transition metal-doped V-shaped RuO2 103 nanotwins as highly active electrocatalysts for enhanced oxygen evolution in acidic media

Contact Info

Product

Resources

About

Transition metal-doped V-shaped RuO₂ 103 nanotwins as highly active electrocatalysts for enhanced oxygen evolution in acidic media