NiFe Hydroxide Supported on Hierarchically Porous Nickel Mesh as a High‐Performance Bifunctional Electrocatalyst for Water Splitting at Large Current Density

Wang, Peican; Wan, Lei; Lin, Yang‐Wei; Wang, Baoguo

doi:10.1002/cssc.201901439

Cited by 51 publications

(35 citation statements)

References 32 publications

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“…Such preparation approach yielded PdO/TiO2 with Wang et al used a relatively simple two-step electrodeposition method for the preparation of high surface area oxygen reduction catalyst-NiFe layered double hydroxide supported on porous nickel modified nickel mesh (NiFe LDH/Ni/Ni). However, the hydrogen evolution activity of this sample was also significantly increased, compared to the activity of NiFe LDH deposited on unmodified Ni mesh in alkaline electrolyte [105]. A similar approach was reported by Yu et al for the preparation of NiO-modified nickel nanodots supported on Ni foam (NiO/NiND@NF).…”

Section: Supported Chalcogenides Hydroxides Pnictides and Carbidessupporting

confidence: 71%

Hydrogen Evolution Reaction-From Single Crystal to Single Atom Catalysts

et al. 2020

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Hydrogen evolution reaction (HER) is one of the most important reactions in electrochemistry. This is not only because it is the simplest way to produce high purity hydrogen and the fact that it is the side reaction in many other technologies. HER actually shaped current electrochemistry because it was in focus of active research for so many years (and it still is). The number of catalysts investigated for HER is immense, and it is not possible to overview them all. In fact, it seems that the complexity of the field overcomes the complexity of HER. The aim of this review is to point out some of the latest developments in HER catalysis, current directions and some of the missing links between a single crystal, nanosized supported catalysts and recently emerging, single-atom catalysts for HER.

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Section: Supported Chalcogenides Hydroxides Pnictides and Carbidessupporting

confidence: 71%

Hydrogen Evolution Reaction-From Single Crystal to Single Atom Catalysts

et al. 2020

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“…Wang et al used a relatively simple two-step electrodeposition method for preparation of high surface area oxygen reduction catalyst -NiFe layered double hydroxide supported on porous nickel modified nickel mesh (NiFe LDH/Ni/Ni). However, the hydrogen evolution activity of this sample was also significantly increased, compared to the activity of NiFe LDH deposited on unmodified Ni mesh in alkaline electrolyte [92]. A similar approach was reported by Yu et al for the preparation of NiO-modified nickel nanodots supported on Ni foam (NiO/NiND@NF).…”

Section: Supported Chalcogenides Hydroxides Pnictides and Carbidessupporting

confidence: 71%

Hydrogen Evolution Reaction - From Single Crystal to Single Atom Catalysts

Gutić¹,

Dobrota²,

Fako³

et al. 2020

Preprint

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Hydrogen evolution reaction (HER) is one of the most important reaction in electrochemistry. This is not only because it is the simplest way to produce high purity hydrogen and the fact that it is the side reaction in many other technologies. HER actually shaped current electrochemistry because it was in focus of active research for so many years (and it still is). The number of catalysts investigated for HER is immense, and it is impossible to overview them all. In fact, it seems that the complexity of the field overcomes the complexity of HER. The aim of this review is to point out some of the latest developments in HER catalysis, current directions and some of the missing links between a single crystal, nanosized supported catalysts and, recently emerging, single atom catalysts for HER.3 of 36 HER at single crystal surfaces and bulk surfacesA crystalline solid can be considered as a series of mutually parallel lattice planes, arranged in a periodic way. Close to the surface, the spatial arrangement of the lattice planes, their crystallographic structure, as well as the dynamics of the constituent atoms may differ from the corresponding features in the bulk [1]. Most clean metals show the tendency to minimize their surface energy. One of the mechanisms is relaxation, the shift of one or more lattice planes located near to the surface, usually perpendicularly to the surface, so that the interlayer distance changes compared to the bulk lattice. The other one is reconstruction -change in equilibrium positions and bonding of surface atoms so that the projection of bulk unit cell to the given surface does not correspond to the surface unit cell. Different crystallographic planes (with different Miller indices) of the same metal exhibit unequal surface densities (number of atoms per surface area), and therefore undergo surface relaxation/reconstruction to different extents [2]. For example, Pt(100) has lower surface density compared to densely packed Pt(111) and therefore has a stronger tendency to relax/reconstruct. Since the main driving force for the mentioned surface modifications is the low coordination number (non-saturation) of surface atoms, it is obvious that atom/molecule adsorption on clean metal surfaces can have a significant effect on its surface structure, inducing relaxation/reconstruction changes. This is of huge importance for HER, as it involves adsorbed atomic hydrogen (Hads) as an intermediate. Additionally, in an electrochemical system, the electrode will be modified by adsorption of "spectator" species (ions/molecules from the electrolyte), so HER will not be taking place on clean metal surfaces, but rather on modified ones. Obviously, there is a complex dynamic interplay between the catalyst surface, reactants, intermediates, and electrolyte.According to the Sabatier principle, the interaction of the reaction reactants/intermediates with the catalyst has to be optimal in strength. If it is too weak, the reactants will not bind to the catalyst and the reaction will not be able to take place. In...

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“…For achieving efficient transition metal based electrocatalysts, the preparation with simple procedure and effective regulation should be concerned significantly, which provides the significant guarantee for tailoring catalytic performances and lowering price. [ 19–22 ] Currently, the widely employed approaches for synthesizing nanostructured catalysts, such as high‐temperature calcination, [ 23–25 ] hydrothermal or solvothermal method, [ 26–28 ] and electro‐deposition, [ 29,30 ] always possess complexed steps, harsh reaction conditions and toxic waste generation and consume large amounts of energy. Specially, some complicated reaction systems with low controllability are difficult to repeatedly produce the similar electrocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Transforming Damage into Benefit: Corrosion Engineering Enabled Electrocatalysts for Water Splitting

Liu

Gong

Deng

et al. 2020

Adv Funct Materials

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Producing high‐purity hydrogen from water electrocatalysis is essential for the flourishing hydrogen energy economy. It is of critical importance to develop low‐cost yet efficient electrocatalysts to overcome the high activation barriers during water electrocatalysis. Among the various approaches of catalyst preparation, corrosion engineering that employs the autogenous corrosion reactions to achieve electrocatalysts has emerged as a burgeoning strategy over the past few years. Benefiting from the advantages of simple synthesis, effective regulation, easy scale‐up production, and extremely low cost, corrosion engineering converts the harmful corrosion process into the useful catalyst preparation, achieving the goal of “transforming damage into benefit.” Herein, the concept of corrosion engineering, fundamental reaction mechanisms, and affecting factors are firstly introduced. Then, recent progresses on corrosion engineering for fabricating electrocatalysts toward water splitting are summarized and discussed. Specific attentions are devoted to the formation mechanisms, catalytic performances, and structure–activity relations of these catalysts as well as the approaches employed for performance improvements. At last, the current challenges and future exploiting directions are proposed for achieving highly active and durable electrocatalysts. It is envisioned to shed light on the multidisciplinary corrosion engineering that is closely associated with corrosion and material science for energy and environmental applications.

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NiFe Hydroxide Supported on Hierarchically Porous Nickel Mesh as a High‐Performance Bifunctional Electrocatalyst for Water Splitting at Large Current Density

Cited by 51 publications

References 32 publications

Hydrogen Evolution Reaction-From Single Crystal to Single Atom Catalysts

Hydrogen Evolution Reaction-From Single Crystal to Single Atom Catalysts

Hydrogen Evolution Reaction - From Single Crystal to Single Atom Catalysts

Transforming Damage into Benefit: Corrosion Engineering Enabled Electrocatalysts for Water Splitting

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