Desert Beetle Inspired Heterogeneous Electrode for Large Current Density Hydrogen Evolution Reaction DOI Open Access

Yingjia Sun,

Chunhui Zhang, Ziwei Guo

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

Abstract The hydrogen (H 2 ) evolution reaction (HER) is a pivotal process in the production of green H , which will play crucial role future sustainable energy systems. Despite extensive efforts to optimize catalyst activity, great challenges related mass transfer at electrode interface still impede improvement HER efficiency. Here, catalytic system inspired designed by desert‐beetle's hydrophilic/hydrophobic patterned back, natural structure capable condensing and transporting fog droplets. This composed superaerophobic (SAB) electrocatalytic dots surrounded with superaerophilic (SAL) coating, can efficiently enhance gaseous dissolved achieve exceptional performance. Such desert beetle‐inspired using platinum (Pt) as achieves an excellent current density (−1252 mA cm −2 −0.5 V versus RHE, times higher than conventional Pt (−408.5 ). overpotential required −10 only −7 mV, compared −25 mV on electrode. also applicable various catalysts (e.g., Re‐Co, Co‐Cu, Co‐Mo, Cu‐Mo, Ni‐Mo), exhibit minimum 200% increase, their structures.

Language: Английский

Gas Evolution in Water Electrolysis DOI
Paul A. Kempler, Robert H. Coridan, Long Luo

et al.

Chemical Reviews, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 11, 2024

Gas bubbles generated by the hydrogen evolution reaction and oxygen during water electrolysis influence energy conversion efficiency of production. Here, we survey what is known about interaction gas electrode surfaces on practicable devices used for electrolysis. We outline physical processes occurring life cycle a bubble, summarize techniques to characterize phenomena in situ practical device environments, discuss ways that electrodes can be tailored facilitate removal at high current densities. Lastly, review efforts model behavior individual multiphase flows produced gas-evolving electrodes. conclude our with short summary outstanding questions could answered future electrochemical environments or improved simulations flows.

Language: Английский

Citations

36

Weakened Hydrophobic Interactions Enhance Bubble Release in Electrocatalytic Water-Splitting DOI Creative Commons
Zhiqing Zhang, Chenyu Qiao, Jingqiao Li

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125019 - 125019

Published: Jan. 1, 2025

Language: Английский

Citations

3

Oxygen versus Hydrogen Bubble Dynamics during Water Electrolysis at Microelectrodes DOI Creative Commons
Alexander Babich, Aleksandr Bashkatov, Milad Eftekhari

et al.

PRX Energy, Journal Year: 2025, Volume and Issue: 4(1)

Published: March 21, 2025

While the dynamics of hydrogen bubbles during water electrolysis have been intensively studied in recent years, adequate insights into oxygen are still lacking. Therefore, this study presents a comparative analysis and bubble potentiostatic an acidic electrolyte. Complementary optical techniques, such as high-speed shadowgraphy, particle tracking velocimetry, schlieren imaging applied to measure geometric features evolving microscale Marangoni convection, well refractive index field around growing bubbles. Distinct differences between found average current, convection pattern, degree reduction at foot, suggesting synergetic action both thermal solutal effects Published by American Physical Society 2025

Language: Английский

Citations

2

Modulating Selectivity and Stability of the Direct Seawater Electrolysis for Sustainable Green Hydrogen Production DOI Creative Commons
Dazhi Yao, Chun Liu, Yanzhao Zhang

et al.

Materials Today Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 100089 - 100089

Published: Feb. 1, 2025

Language: Английский

Citations

1

Enhancing Water Electrolysis Performance by Bubble Behavior Management DOI Open Access

Jiaxuan Qiu,

Jiayi Yao, Yufeng Zhang

et al.

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 16, 2025

Abstract Electrocatalytic water splitting for hydrogen generation plays a crucial role in promoting the energy transition and achieving goals of carbon neutrality. Nevertheless, context electrolysis, generated bubbles have an adverse impact on consumption mass transfer efficiency. To address this challenge, variety strategies are investigated to accelerate bubble detachment transport. It is utmost significance summarize those facilitating advancement electrolysis performance. In review, comprehensive account presented enhancing performance through behavior management. First, electrolyte discussed. Then, optimized interactions between electrode surface introduced, which focus reducing adhesion forces implementing other forces. Next, dynamic bubbling deformable catalysts discussed, such as fern‐ caterpillar‐like catalysts. Following that, bubble‐bubble coalescence proved be beneficial earlier departure compared buoyancy effect alone. Finally, outlooks future development efficient removal enhanced The review aims deepen comprehension stimulate management strategies, thereby further electrolysis.

Language: Английский

Citations

1

A general mass transfer equation for gas-evolving electrodes DOI Creative Commons
J.W. Haverkort

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 74, P. 283 - 296

Published: June 14, 2024

Language: Английский

Citations

7

Insight into the electrolyte concentration impact on single hydrogen bubble evolution dynamics at a microelectrode during electrochemical water splitting DOI

Chenyu Guo,

Xinlong Lu,

Yizhou Zhu

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(7)

Published: July 1, 2024

Bubbles generated during electrochemical water splitting could adhere to the electrode surface and therefore impede reaction. Thus, understanding manipulating evolution dynamics of bubbles is crucial for enhancing electrolysis efficiency. In this study, we investigated mechanism forces acting on individual hydrogen bubble Pt microelectrode by employing different H2SO4 electrolyte concentrations (0.2–1.0 M) under various applied voltages [−2 −6 V vs saturated calomel (SCE)]. We focused detachment diameter, average current, lifetime subsequently established relational equations over these variables. At SCE, growth coefficient has a maximum value 14.42 × 10−4 m/s0.333 when concentration around 0.6 M. Gas production at M increased 63.4% compared 0.2 11.2% 1.0 Therefore, choosing appropriate can maximize gas Additionally, force balance model incorporating Marangoni single was across varying electrolyte. −4 solutal starts dominate above 0.4 The results demonstrate critical role beyond certain concentration.

Language: Английский

Citations

7

Pulsed dynamic electrolysis enhanced PEMWE hydrogen production: Revealing the effects of pulsed electric fields on protons mass transport and hydrogen bubble escape DOI
Xuewei Zhang, Weitao Zhou, Yuming Huang

et al.

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: 100, P. 201 - 214

Published: Aug. 26, 2024

Language: Английский

Citations

7

Manipulating Boiling Bubble Dynamics on Under‐Liquid Superaerophobic Silicon Surfaces for High‐Performance Phase‐Change Cooling DOI Open Access

Chuanghui Yu,

Zhe Xu,

Shaofan He

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 5, 2025

Abstract Enhancing critical heat flux (CHF) and transfer coefficient (HTC) by promoting the nucleation, growth, departure of boiling bubbles has drawn significant attention owing to its wide applications. However, in‐depth understanding comprehensive manipulation under‐liquid bubble dynamics from in situ microscale perspectives remain challenging. Herein, observations analyses microsized ultra‐low surface tension fluorinated liquids (FLs) are conducted on superaerophobic silicon surfaces with crisscross microchannels selective nanowires. It is revealed that deep yet short nanowires enable ultrafast liquid spreading (<549.6 ms) ultralow adhesion (≈1.1 µN), while an appropriate spacing (240–600 µm) between minimizes time (<20.6 due timely coalescence. By verifying above principles through collaborative enhancement CHF HTC, optimized structure (microchannel depth ≈52.9 µm, microchannel ≈362.9 nanowire length ≈0 nm) obtained further implemented onto exposed Si a commercial CPU chip. Cooled phase‐change FLs, average temperature maintains ≈64.9 °C even under extreme power loads (≈130 W), far below than those conventional air‐cooling water‐cooling operations.

Language: Английский

Citations

1

How dual hydrogen bubble evolution inhibits electrolytic performance DOI
Xinlong Lu, Devendra Yadav, Jie Liu

et al.

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 632, P. 236356 - 236356

Published: Jan. 31, 2025

Language: Английский

Citations

1