Cited by 67Electrocatalysts for Energy ConversionMinerals Flotation and Separation TechniquesSurface Modification and Superhydrophobicity

Bubble‐Guidance Breaking Gas Shield for Highly Efficient Overall Water Splitting

Li, Yuliang, Li, Ke, Li, Lu, Gao, Jinxin, Wang, Zhaoyang, Zou, Wentao, Li, Honghao, Zhang, Qiuya +4 more·2024·Advanced Materials

Abstract

Overall water splitting is a promising technology for sustainable hydrogen production, but the primary challenge is removing bubbles from the electrode surface quickly to increase hydrogen production. Inspired by the directional fluid transport properties of natural biological surfaces like Nepenthes peristome and Morpho butterfly's wings, here a strategy is demonstrated to achieve highly efficient overall water splitting by a bubble‐guidance electrode, that is, an anisotropic groove‐micro/nanostructured porous electrode (GMPE). Gradient groove micro/nanostructures on the GMPE serve as high‐speed bubble transmission channels and exhibit superior bubble‐guidance capabilities. The synergistic effect of the asymmetric Laplace pressure generated between microscale porous structure and groove patterns and the buoyancy along the groove patterns pushes the produced bubbles directionally to spread, transport, and detach from the electrode surface in time. Moreover, the low adhesive nanosheet arrays are beneficial to reduce bubble size and increase bubble release frequency, which cooperatively improve mass transfer with the microscale structure. Notably, GMPE outperforms planar‐micro/nanostructured porous electrode (PMPE) in hydrogen/oxygen evolution reactions, with GMPE||GMPE showing better water splitting performance than commercially available RuO 2 ||20 wt.% Pt/C. This work improves electrodes for better mass transfer and kinetics in electrochemical reactions at solid‐liquid‐gas interfaces, offering insight for designing and preparing gas‐involved photoelectrochemical electrodes.

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Crossref · 10.1002/adma.202405493

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Authors
Li, Y., Li, K., Li, L., Gao, J., Wang, Z., Zou, W., Li, H., Zhang, Q., Li, Y., Zhang, X., Tian, D., & Jiang, L.
Affiliations
  • Beihang University (CN)
  • University of Science and Technology Beijing (CN)
  • Chinese Academy of Sciences (CN)
Corresponding author
Tian, Dongliang
Venue
Advanced Materials
Publisher
Wiley
Published
2024-08-13
Volume
36
Issue
41
Pages
e2405493-e2405493
ISSN
  • 0935-9648 (ISSN-L)
  • 1521-4095
OpenAlex
W4401554082
Cited by
67
References
49
Citations by year
2026: 33 · 2025: 31 · 2024: 3
FWCI
4.46
Type
journal article
Language
en
Open access
closed
Locations
  • Advanced Materials (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Natural Science Foundation of China (22272005)
  • Fundamental Research Funds for the Central Universities (ZY2426)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Environmental Science › Water Science and Technology › Minerals Flotation and Separation Techniques
  • Physical Sciences › Materials Science › Surfaces, Coatings and Films › Surface Modification and Superhydrophobicity
Keywords
overall water splitting, bubble removal, hydrogen evolution reaction, oxygen evolution reaction, porous electrodes, Laplace pressure, bubble buoyancy, nanosheet arrays, mass transfer, biomimetic surfaces, Morpho butterfly wings, photoelectrodes, hydrogen production

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