Evaluation of Hydrogen Bubble Growth on a Platinum Microelectrode Under Varying Electrical Potential DOI Creative Commons
Klara Arhar, Matic Može, Matevž Zupančič

et al.

Applied Sciences, Journal Year: 2025, Volume and Issue: 15(8), P. 4107 - 4107

Published: April 8, 2025

Green hydrogen, produced via electrolysis using renewable energy, is a zero-emission fuel essential for the global transition to sustainable energy systems. Optimizing hydrogen production requires detailed understanding of bubble dynamics at cathode, which involves three key stages: nucleation, growth, and detachment. In this study, growth was investigated in custom-built cell with microelectrodes, combining high-speed imaging electrochemical measurements potentiostat. The results reveal distinct regimes governed by potential-dependent time exponent, captured through power law. Within evaluated range potentials, regions different departure behaviors were identified: (i) low potentials (2.0–2.6 V), bubbles depart without coalescing, (ii) transitional region (2.6–3.2 coalesce varying degrees before detachment, (iii) high (≥3.2 large, coalesced dominate. These findings highlight significant impact coalescence on behavior, affecting electrode coverage gas and, consequently, efficiency. Understanding these interactions crucial improving evolution efficiency mitigating bubble-induced mass transport limitations. contribute advancing performance, offering insights into optimizing operating conditions enhanced production.

Language: Английский

Evaluation of Hydrogen Bubble Growth on a Platinum Microelectrode Under Varying Electrical Potential DOI Creative Commons
Klara Arhar, Matic Može, Matevž Zupančič

et al.

Applied Sciences, Journal Year: 2025, Volume and Issue: 15(8), P. 4107 - 4107

Published: April 8, 2025

Green hydrogen, produced via electrolysis using renewable energy, is a zero-emission fuel essential for the global transition to sustainable energy systems. Optimizing hydrogen production requires detailed understanding of bubble dynamics at cathode, which involves three key stages: nucleation, growth, and detachment. In this study, growth was investigated in custom-built cell with microelectrodes, combining high-speed imaging electrochemical measurements potentiostat. The results reveal distinct regimes governed by potential-dependent time exponent, captured through power law. Within evaluated range potentials, regions different departure behaviors were identified: (i) low potentials (2.0–2.6 V), bubbles depart without coalescing, (ii) transitional region (2.6–3.2 coalesce varying degrees before detachment, (iii) high (≥3.2 large, coalesced dominate. These findings highlight significant impact coalescence on behavior, affecting electrode coverage gas and, consequently, efficiency. Understanding these interactions crucial improving evolution efficiency mitigating bubble-induced mass transport limitations. contribute advancing performance, offering insights into optimizing operating conditions enhanced production.

Language: Английский

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