Electrical engineering

Electrode

Exaggeration

Cyclic voltammetry

Operating system

Analytical Chemistry (journal)

Psychiatry

Engineering

Electrolysis

Physical chemistry

Psychology

Composite material

Chemistry

Materials science

Polarization (electrochemistry)

Voltammetry

Linear sweep voltammetry

Computer science

Transient (computer programming)

Electrolyte

Transient state

Chromatography

Electrochemistry

FOIL method

Steady state (chemistry)

Journal of The Electrochemical Society

Cyclic and linear sweep voltammetry techniques substantially misjudge the performance of water splitting electrocatalysts due to their transient nature that forbids the interface from reaching a steady-state. This misjudgment leads to the potentially detrimental yet unwittingly falsified data accumulation in the literature that requires immediate attention. Alternatively, sampled-current voltammetry (SCV) constructed from steady-state responses is advised to be widely adopted for screening electrocatalysts that are actually destined for steady-state operations. To show that this exaggeration is universal, a well-characterized activated SS, coprecipitated Co(OH) 2 , and Pt foil electrodes are studied for OER and HER in 1.0 M KOH. The results urge that it is time to adopt a relatively more precise alternative technique such as SCV.

Worrisome Exaggeration of Activity of Electrocatalysts Destined for Steady-State Water Electrolysis by Polarization Curves from Transient Techniques