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Concept

Dynamic hydrogen electrode

A dynamic hydrogen electrode (DHE) is a reference electrode, more specific a subtype of the standard hydrogen electrodes for electrochemical processes by simulating a reversible hydrogen electrode with an approximately 20 to 40 mV more negative potential. A separator in a glass tube connects two electrolytes and a small current is enforced between the cathode and anode.

Official source

https://en.wikipedia.org/wiki/Dynamic_hydrogen_electrode

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Related units (1)

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Official source

https://en.wikipedia.org/wiki/Dynamic_hydrogen_electrode

About this result

Related lectures (3)

Electrochemical Cell: pH Calculation

Covers the calculation of pH in an electrochemical cell scenario involving copper and hydrogen electrodes.

Measuring Biopotentials: Electrode Interface

Explains the electrode-electrolyte interface in measuring biopotentials and the importance of measuring potential between different electrodes.

Redox Reactions and Equilibrium Log in to Mediaspace to watch this video

Explores oxidation, reduction, redox reactions, Nernst equation, redox potential calculation, and pe-pH stability diagrams.

Related publications (28)

Photochemical oxidation of phenols and anilines mediated by phenoxyl radicals in aqueous solution

Urs von Gunten, Stephanie Christa Remke

PERGAMON-ELSEVIER SCIENCE LTD2022

Bulk Heterojunction Organic Semiconductor Photoanodes: Tuning Energy Levels to Optimize Electron Injection

Kevin Sivula, Jun Ho Yum, Liang Yao, Nestor Guijarro Carratala, Yongpeng Liu, Arvindh Sekar, Han-Hee Cho, Juan Manuel Moreno Naranjo, Barbara Alexandra Primera Darwich

AMER CHEMICAL SOC2022

Solid-state synthesis of CdFe2O4 binary catalyst for potential application in renewable hydrogen fuel generation

Michael Graetzel, Shaik Mohammed Zakeeruddin

Nature Portfolio2022

Related units (1)

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Related concepts (4)

Palladium-hydrogen electrode

The palladium-hydrogen electrode (abbreviation: Pd/H2) is one of the common reference electrodes used in electrochemical study. Most of its characteristics are similar to the standard hydrogen electrode (with platinum). But palladium has one significant feature—the capability to absorb (dissolve into itself) molecular hydrogen. Two phases can coexist in palladium when hydrogen is absorbed: alpha-phase at hydrogen concentration less than 0.025 atoms per atom of palladium beta-phase at hydrogen concentration corresponding to the non-stoichiometric formula PdH0.

Reversible hydrogen electrode

A reversible hydrogen electrode (RHE) is a reference electrode, more specifically a subtype of the standard hydrogen electrodes, for electrochemical processes. Unlike the standard hydrogen electrode, its measured potential does change with the pH, so it can be directly used in the electrolyte. The name refers to the fact that the electrode is directly immersed in the actual electrolyte solution and not separated by a salt bridge. The hydrogen ion concentration is therefore not 1 mol/L, or 1 mol/kg, but corresponds to that of the electrolyte solution.

Reference electrode

A reference electrode is an electrode that has a stable and well-known electrode potential. The overall chemical reaction taking place in a cell is made up of two independent half-reactions, which describe chemical changes at the two electrodes. To focus on the reaction at the working electrode, the reference electrode is standardized with constant (buffered or saturated) concentrations of each participant of the redox reaction. There are many ways reference electrodes are used.