Imaging nanobubble nucleation and hydrogen spillover during electrocatalytic water splitting

被引：141

作者：

Hao, Rui ^{[1
]}

Fan, Yunshan ^{[1
]}

Howard, Marco D. ^{[1
]}

Vaughan, Joshua C. ^{[1
]}

Zhang, Bo ^{[1
]}

机构：

[1] Univ Washington, Dept Chem, Seattle, WA 98195 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2018年 / 115卷 / 23期

基金：

美国国家科学基金会;

关键词：

electrocatalysis; imaging; hydrogen evolution reaction; nanobubbles; hydrogen spillover; SURFACE NANOBUBBLES; MICROSCOPY; CATALYSIS;

D O I：

10.1073/pnas.1800945115

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Nucleation and growth of hydrogen nanobubbles are key initial steps in electrochemical water splitting. These processes remain largely unexplored due to a lack of proper tools to probe the nanobubble's interfacial structure with sufficient spatial and temporal resolution. We report the use of superresolution microscopy to image transient formation and growth of single hydrogen nanobubbles at the electrode/solution interface during electrocatalytic water splitting. We found hydrogen nanobubbles can be generated even at very early stages in water electrolysis, i.e., similar to 500 mV before reaching its thermodynamic reduction potential. The ability to image single nanobubbles on an electrode enabled us to observe in real time the process of hydrogen spillover from ultrathin gold nanocatalysts supported on indium-tin oxide.

引用

页码：5878 / 5883

页数：6

共 31 条

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