Highly stable single Pt atomic sites anchored on aniline-stacked graphene for hydrogen evolution reaction

Ye, Shenghua; Luo, Feiyan; Zhang, Qianling; Zhang, Pingyu; Xu, Tingting; Wang, Qi; He, Dongsheng; Guo, Licheng; Zhang, Yu; He, Chuanxin; Ouyang, Xiaoping; Gu, Meng; Liu, Jianhong; Sun, Xueliang

doi:10.1039/c8ee02888e

Cited by 416 publications

(237 citation statements)

References 61 publications

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“…The noble metal platinum is recognized as one of the most effective catalysts for the HER. Simultaneously having a low energy barrier in the Volmer step and a rapid Tafel step, Pt‐based catalysts exhibit excellent HER performance in acidic media . However, in alkaline solutions, the sluggish kinetics of the water dissociation step still cripple HER performance, even for Pt‐based electrocatalysts, and hence it remains a big challenge to develop catalytic materials with significantly accelerated kinetics for water dissociation …”

Section: Figurementioning

confidence: 76%

“…Simultaneously having al ow energy barrier in the Volmer step and ar apid Ta fel step, Ptbased catalysts exhibit excellent HER performance in acidic media. [4][5][6][7] However,i na lkaline solutions, the sluggish kinetics of the water dissociation step still cripple HER performance, even for Pt-based electrocatalysts, andh ence it remains ab ig challenget od evelop catalytic materials with significantly accelerated kinetics for water dissociation. [2] Metal-metalo xide catalysts have been widely recognized as an asset for reinforcing catalytic performances in chemical catalysis reactions.…”

mentioning

confidence: 99%

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Boosting Alkaline Hydrogen Evolution Electrocatalysis over Metallic Nickel Sites through Synergistic Coupling with Vanadium Sesquioxide

et al. 2019

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For renewable and sustainable energy, developing cut‐price and high‐efficiency electrocatalysts for the hydrogen evolution reaction (HER) by alkaline water electrolysis is of paramount importance. In this study, a compound electrocatalyst composed of nickel–vanadium sesquioxide nanoparticles supported on porous nickel foam (Ni‐V2O3/NF) is found to exhibit electrocatalytic performance towards HER that is superior to that of the commercial Pt/C catalyst, with nearly zero onset overpotential, an extremely low overpotential of 25 mV to obtain a current density of −10 mA cm−2, a Tafel slope of 58 mV dec−1, and a good durability for 24 h in 1.0 m KOH. Theoretical calculations reveal that the presence of V2O3 optimizes the electronic structure of active Ni components and continuously accelerates the dissociation of water molecules, which in turn improves the HER kinetics. The present work will advance the development of highly efficient nanocomposite electrocatalysts for alkaline water electrocatalysis.

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Section: Figurementioning

confidence: 76%

mentioning

confidence: 99%

Boosting Alkaline Hydrogen Evolution Electrocatalysis over Metallic Nickel Sites through Synergistic Coupling with Vanadium Sesquioxide

et al. 2019

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“…Furthermore, according to the electrolysis equation, which consists three parts

({normalE}_{electrolysis} = {normalE}_{reversible} + Δ {normalE}_{irreversible} + IR)

; ∆E irreversible is called overpotential for HER, E reversible expresses the theoretical disintegration voltage, and IR represents the drop voltage occurred via contact point, wires, and electrolyte. Usually, the overpotential is calculated at a current density of 10 mA cm −2 are widely used to evaluate the performances of the electrocatalysts regarded a standard reference by many researchers . Ideal electrocatalysts are those which can give low overpotential at higher current density.…”

Section: Electrochemical Evaluating Parameters For Hermentioning

confidence: 99%

“…Usually, the overpotential is calculated at a current density of 10 mA cm −2 are widely used to evaluate the performances of the electrocatalysts regarded a standard reference by many researchers. 47,48 Ideal electrocatalysts are those which can give low overpotential at higher current density. To determine the precise overpotential, the scan rate of polarization curves should be low such as 2 to 5 mV s −1 to reduce the capacitive current.…”

Section: Onset Potential/overpotentialmentioning

confidence: 99%

Nonprecious metal's graphene‐supported electrocatalysts for hydrogen evolution reaction: Fundamentals to applications

2019

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Sustainable production of hydrogen is a hopeful requirement of a strategic future economy and development. Water splitting driven by electricity is a favorable pathway for renewable hydrogen production. This critical review highlighted recent efforts toward the development of the nanoscale synthesis of nonprecious metal's graphene‐supported electrocatalysts and their electrocatalytic features for remarkable hydrogen evolution reaction (HER). Different essential nonprecious metal's graphene‐supported electrocatalysts, including metal carbides, sulfides, phosphides, selenides, oxides, and nitrides are reviewed. In the exploration, attention is given to the strategies of activity enhancement, the synthetic approach, and the composition/structure electrocatalytic‐performance relationship of these HER electrocatalysts. We are hopeful that this review confers a new momentum to the rational design of remarkable performance nonprecious metal's graphene‐supported electrocatalysts and comprehensive guide for researchers to utilize the subject catalysts in regular water splitting.

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“…Noble metals have been considered as one kind of the best‐performing catalysts for HER process due to their negligible overpotential and fast reaction rates . For instance, Ru atoms were successfully embedded on C 3 N 4 /rGO (Ru‐C 3 N 4 /rGO) by the simple thermal reduction ( Figure a).…”

Section: Electrochemical Applications Of Sagmentioning

confidence: 99%

Single Atoms on Graphene for Energy Storage and Conversion

et al. 2019

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Single atoms are attracting much attention in the field of energy conversion and storage due to their maximal atomic utilization, high efficiency, and good selectivity. Moreover, their unique electronic structure could improve the intrinsic activity of the active sites. However, the high surface free energy of single atoms inevitably results in their serious aggregation, leading to degraded catalytic activity and poor cycling life. To solve these issues, supports with high surface areas have to be developed to reduce loading density of single atoms and further decrease the surface free energy. Furthermore, engineering the active sites of these substrates can also regulate chemical coordination of single atoms, enhancing their catalytic performance. Owing to high surface area, excellent conductivity and adjustable surface properties, graphene is widely utilized to load atomic metal catalysts. In this review, the fabrication strategies and characterization methods of single atoms on graphene (SAG) are summarized first. Subsequently, the electrochemical applications of SAG on the oxygen reduction reaction, oxygen evolution reaction, hydrogen evolution reaction, carbon dioxide reduction, and methane oxidation are discussed in detail. Finally, the future developments and prospects in fabrication and application of SAG are also discussed.

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Highly stable single Pt atomic sites anchored on aniline-stacked graphene for hydrogen evolution reaction

Abstract: Single-atom Pt sites stabilized by aniline stacked on graphene exhibit excellent electrocatalytic activity and durability for the hydrogen evolution reaction.

Cited by 416 publications

References 61 publications

Boosting Alkaline Hydrogen Evolution Electrocatalysis over Metallic Nickel Sites through Synergistic Coupling with Vanadium Sesquioxide

Boosting Alkaline Hydrogen Evolution Electrocatalysis over Metallic Nickel Sites through Synergistic Coupling with Vanadium Sesquioxide

Nonprecious metal's graphene‐supported electrocatalysts for hydrogen evolution reaction: Fundamentals to applications

Single Atoms on Graphene for Energy Storage and Conversion

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