Izvorni znanstveni članak
https://doi.org/https://doi.org/10.5599/jese.3133
Ultrasound-assisted alkaline water electrolysis in a membrane-separated H-type cell: a device-scale benchmark under galvanostatic operation
Zeng ChenHongWen
; School of Mechanical Engineering, Tuanku Syed Sirajuddin Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia
Teoh Yew Heng
; School of Mechanical Engineering, Tuanku Syed Sirajuddin Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia
*
Heoy Geok How
; Department of Engineering, UOW Malaysia KDU Penang University College, Batu Kawan Campus, PMT755, Persiaran Cassia Barat 3, Bandar Cassia, 14110, Simpang Ampat, Malaysia
Mohamad Yusof Idroas
; School of Mechanical Engineering, Tuanku Syed Sirajuddin Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia
Thanh Danh Le
; College of Technology and Design, University of Economics Ho Chi Minh City (UEH), 59C Nguyen Dinh Chieu Street, Xuan Hoa Ward, Ho Chi Minh City 700000, Viet Nam
* Dopisni autor.
Sažetak
Reported benefits of ultrasound in alkaline water electrolysis remain difficult to compare because apparent gains can be influenced by thermal drift, inconsistent energy-accounting boundaries, and differences in reactor geometry. Here, we provide a conservative benchmark of ultrasound-assisted alkaline water electrolysis in a small, membrane-separated H-type cell operated galvanostatically in 2.0 M NaOH at 0.6, 0.8, and 1.0 A. Silent electrolysis, low-amplitude ultrasound, and high-amplitude ultrasound were compared over a unified 300 s window while maintaining the catholyte near the hydrogen-evolving electrode at 32-34 °C. Under these tightly controlled conditions, ultrasound produced small but consistent device-internal effects: collected H₂ output increased by about 1 %, purity-corrected Faradaic efficiency remained essentially unchanged at around 66 %, and the average cell voltage decreased by approximately 0.09 to 0.29 V, corresponding to a 1.6 to 2.1 % reduction in specific electrical energy consumption on an electrolyzer-electrical basis. These results are most consistent with relief of bubble-related and near-electrode transport losses, rather than the emergence of a new reaction pathway or a large change in intrinsic reaction kinetics. At 1.0 A, varying ultrasonic amplitude further indicated a practical operating window in which moderate ultrasound minimized electrolyzer-electrical SEC, whereas higher amplitude maximized instantaneous hydrogen throughput but caused visible graphite-anode degradation in the present geometry. The present results, therefore, do not establish a full-system energy benefit; instead, they provide a conservative, device-internal benchmark for assessing when, and to what extent, ultrasound may remain useful under rigorously controlled conditions. Future studies should extend this framework to reduced-gap cells, advanced electrodes, and full system-level accounting that explicitly includes acoustic power and balance-of-plant loads.
Ključne riječi
Electrochemical water splitting; sono-electrolysis; device-scale benchmark; hydrogen production
Hrčak ID:
351767
URI
Datum izdavanja:
12.5.2026.
Posjeta: 0 *