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

Author:

Li Yuliang1,Li Ke1,Li Lu1,Gao Jinxin1,Wang Zhaoyang1,Zou Wentao1,Li Honghao1,Zhang Qiuya1,Li Yan1,Zhang Xiaofang2,Tian Dongliang1ORCID,Jiang Lei13

Affiliation:

1. Key Laboratory of Bio‐Inspired Smart Interfacial Science and Technology School of Chemistry Beihang University Beijing 100191 P. R. China

2. School of Mathematics and Physics University of Science & Technology Beijing Beijing 100083 P. R. China

3. Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100191 P. R. China

Abstract

AbstractOverall 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 RuO2||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.

Funder

National Natural Science Foundation of China

Fundamental Research Funds for the Central Universities

Publisher

Wiley

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3