Strategies to accelerate bubble detachment for efficient hydrogen evolution

Yin, Weinan; Yuan, Lexing; Huang, Hao; Cai, Yuntao; Pan, Junan; Sun, Ning; Zhang, Qiyu; Shu, Qianhe; Gu, Chen; Zhuang, Zechao; Wang, Longlu

doi:10.1016/j.cclet.2023.108351

Cited by 16 publications

(5 citation statements)

References 96 publications

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“…The movement of oxygen bubbles would in turn propel the electrolyte dynamics, contributing to the decreased bubble departure diameter, growth time, and working electrode potential. Thus, the external magnetic fields can effectively decrease the working electrode potential, bubble departure diameter, and growth time. , …”

Section: Other Methods For Bubble Managementmentioning

confidence: 99%

“…Thus, the external magnetic fields can effectively decrease the working electrode potential, bubble departure diameter, and growth time. 129,130 To control the bubble evolution process, an ultrasound field has been used as a potential method. In the gas evolution reaction, bubbles oscillate, agglomerate, and coalesce with large bubbles nearby on the electrode surface.…”

Section: ■ Other Methods For Bubble Managementmentioning

confidence: 99%

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Bubble Management for Electrolytic Water Splitting by Surface Engineering: A Review

Cheng,

Du,

Ding

et al. 2023

Langmuir

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Section: Other Methods For Bubble Managementmentioning

confidence: 99%

Section: ■ Other Methods For Bubble Managementmentioning

confidence: 99%

Bubble Management for Electrolytic Water Splitting by Surface Engineering: A Review

Cheng,

Du,

Ding

et al. 2023

Langmuir

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“…In addition, the nanoarray design can precisely control the distribution and structure of the active site of the catalyst, so as to achieve the regulation of reaction activity and selectivity. The density and distribution of catalytic active sites can be optimized and the activity and stability of catalysts can be improved by rational design of nanostructures [115].…”

Section: Design Of Nanoarrays Toward Efficient Electrochemical Water ...mentioning

confidence: 99%

Bubbles Management for Enhanced Catalytic Water Splitting Performance

Zhang,

Gu,

Wang

et al. 2024

Catalysts

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Water splitting is widely acknowledged as an efficient method for hydrogen production. In recent years, significant research efforts have been directed towards developing cost-effective electrocatalysts. However, the management of bubbles formed on the electrode surface during electrolysis has been largely overlooked. These bubbles can impede the active sites, resulting in decreased catalytic performance and stability, especially at high current densities. Consequently, this impediment affects the energy conversion efficiency of water splitting. To address these challenges, this review offers a comprehensive overview of advanced strategies aimed at improving catalytic performance and mitigating the obstructive effects of bubbles in water splitting. These strategies primarily involve the utilization of experimental apparatus to observe bubble-growth behavior, encompassing nucleation, growth, and detachment stages. Moreover, the review examines factors influencing bubble formation, considering both mechanical behaviors and internal factors. Additionally, the design of efficient water-splitting catalysts is discussed, focusing on modifying electrode-surface characteristics. Finally, the review concludes by summarizing the potential of bubble management in large-scale industrial hydrogen production and identifying future directions for achieving efficient hydrogen production.

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“…Lee et al highlighted that rational electrode structure design can reduce bubble accumulation and reduce the overpotential related to mass transfer by 76.7%. These findings underscore the significance of bubble management and electrode structure in enhancing mass transfer and electrode efficiency. − …”

Section: Introductionmentioning

confidence: 99%

Capillary-Driven Separate Gas–Liquid Transport: Alleviating Mass Transport Losses for Efficient Hydrogen Evolution

Liu,

Huang,

et al. 2024

ACS Appl. Mater. Interfaces

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Developing earth-abundant transition metal electrodes with high activity and durability is crucial for efficient and cost-effective hydrogen production. However, numerous studies in the hydrogen evolution reaction (HER) primarily focus on improving the inherent activity of catalysts, and the critical influence of gas−liquid countercurrent transport behavior is often overlooked. In this study, we introduce the concept of separate-path gas−liquid transport to alleviate mass transport losses for the HER by developing a novel hierarchical porous Ni-doped cobalt phosphide electrode (CoNi x -P@Ni). The CoNi x -P@Ni electrodes with abundant microvalleys and crack structures facilitate the gas−liquid cotransport by separating the bubble release and water supply paths. Visualization and numerical simulation results demonstrate that cracks primarily serve as water supply paths, with capillary pressure facilitating the transport of water from the cracks to the microvalleys. This process ensures the continuous wetting of electrolytes in the electrode, reduces hydrogen supersaturation near the active site, and increases hydrogen transport flux to the microvalleys for accelerating bubble growth. Additionally, the microvalleys act as preferential sites for bubble evolution, preventing bubble coverage on other active sites. By regulating the amount of nickel, the CoNi 1 −P@Ni electrode exhibited the smallest and densest microvalleys and cracks, achieving superior HER performance with an overpotential of 51 mV at 10 mA cm −2 . The results offer a promising direction for constructing high-performance HER electrodes.

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Strategies to accelerate bubble detachment for efficient hydrogen evolution

Cited by 16 publications

References 96 publications

Bubble Management for Electrolytic Water Splitting by Surface Engineering: A Review

Bubble Management for Electrolytic Water Splitting by Surface Engineering: A Review

Bubbles Management for Enhanced Catalytic Water Splitting Performance

Capillary-Driven Separate Gas–Liquid Transport: Alleviating Mass Transport Losses for Efficient Hydrogen Evolution

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