Reversible hydrogen electrode

Voltage, Capacitors, and Batteries

Published in Juan Bisquert, The Physics of Solar Energy Conversion, 2020

The change of pH is a very important instance of the modification of the redox potential by the change of concentration of the active redox species. All the reactions associated to water hydrolysis change with pH, as shown in Figure 3.11, and many semiconductors energy levels also shift with pH (see later Equation 9.51). It is therefore practical to use a reference electrode that changes with pH. The reversible hydrogen electrode (RHE) is constructed similar to the SHE but the pH is not fixed at zero, and can have any value. If the pressure of the hydrogen gas is still pH2 = p0, the potential derived from Equation 3.61 has the value VRHE=VpH=0−2.3kBTq(pH)

Highly active and stable synergistic Ir–IrO₂ electro-catalyst for oxygen evolution reaction

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Journal Information

Published in Chemical Engineering Communications, 2018

Zhen-Hua Zhou, Wei Sun, Waqas Qamar Zaman, Li-Mei Cao, Ji Yang

To evaluate the OER property of the Ir–IrO2 composites and IrO2, the samples were deposited onto Ti plates as anode working electrodes, which resulted in uniform catalyst films with a catalyst loading of 0.2 mg cm−2. Linear sweep voltammetry activities, Tafel plots, and stability tests using the prepared electrodes have been characterized in 0.1 M HClO4 acid solution. All the potentials quoted above are calibrated against a reversible hydrogen electrode (RHE) for the comparison purpose.

Reversible hydrogen electrode

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Voltage, Capacitors, and Batteries

Highly active and stable synergistic Ir–IrO2 electro-catalyst for oxygen evolution reaction

Highly active and stable synergistic Ir–IrO₂ electro-catalyst for oxygen evolution reaction