Recent advances in methods and technologies for enhancing bubble detachment during electrochemical water splitting

Darband, Ghasem Barati; Mahmood, Asif; Shanmugam, Sangaraju

doi:10.1016/j.rser.2019.109300

Cited by 237 publications

(123 citation statements)

References 120 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The use of superhydrophobic surfaces or of external fields such as super gravity, ultrasound or magnetic fields have been proposed to prevent the bubbles from sticking to the electrodes 10 , 11 . In commercial electrolysers this phenomenon is partly combated by the use of electrolyte flow across the conductive substrate onto which the catalyst is loaded (required in a continuous process) which seems to enable the evacuation of bubbles 12 .…”

Section: Introductionmentioning

confidence: 99%

Effect of electrolyte flow on a gas evolution electrode

Abdelghani-Idrissi

Dubouis

Grimaud

et al. 2021

Sci Rep

View full text Add to dashboard Cite

In this study, the effect of flow of the electrolyte on an electrolysis cell and a zinc cell is investigated. The gain of energy brought by the flow is discussed and compared to the viscous losses in the cells. We point out that the balance between the gained electrical power and the viscous loss power is positive only if the hydrodynamic resistance of the circuit is correctly designed and further comment on the economical viability of the whole process. A model of the studied phenomena is proposed in the last section. This analytical model captures the dynamics of the process, gives the optimal flowing conditions and the limits of the energetical rentability of the process. This study shows that the use of flowing electrolyte in zinc–air batteries can be energetically profitable with the appropriate flowing conditions.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of electrolyte flow on a gas evolution electrode

Abdelghani-Idrissi

Dubouis

Grimaud

et al. 2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…A number of recent reviews provide extensive insights into the latest developments in the field of supported catalysts and electrocatalytic HER. Overview of general wisdom on supported catalysts and current knowledge on electrocatalytic HER is summarized in References [41][42][43]. Several fresh reviews deal with more specific catalyst and/or support materials, such as References [44][45][46] for carbon-based supports, References [47,48] for metal-organic frameworks, Reference [49] for 1D and 2D noble metals, and other specific materials in References [50][51][52].…”

Section: Her At Supported Catalystsmentioning

confidence: 99%

Hydrogen Evolution Reaction-From Single Crystal to Single Atom Catalysts

et al. 2020

View full text Add to dashboard Cite

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.

show abstract

“…Overview of general wisdom on supported catalysts and current knowledge on electrocatalytic HER is summarized in Refs. [33][34][35]. Several fresh reviews deal with more specific catalyst and/or support materials, such as Refs.…”

Section: Her At Supported Catalystsmentioning

confidence: 99%

Hydrogen Evolution Reaction - From Single Crystal to Single Atom Catalysts

Gutić¹,

Dobrota²,

Fako³

et al. 2020

Preprint

View full text Add to dashboard Cite

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...

show abstract

Recent advances in methods and technologies for enhancing bubble detachment during electrochemical water splitting

Cited by 237 publications

References 120 publications

Effect of electrolyte flow on a gas evolution electrode

Effect of electrolyte flow on a gas evolution electrode

Hydrogen Evolution Reaction-From Single Crystal to Single Atom Catalysts

Hydrogen Evolution Reaction - From Single Crystal to Single Atom Catalysts

Contact Info

Product

Resources

About