期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 111, 期 22, 页码 7942-7947出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1405365111
关键词
photocatalysis; hydrogen production; gold-titania; time-resolved fluorescence; core-shell nanostructures
资金
- US National Science Foundation (NSF) [CRIF-0840055, DMR-0958796]
- US Department of Energy, Office of Basic Sciences [DOE-FG02-09ER16096]
The production of hydrogen from water with semiconductor photocatalysts can be promoted by adding small amounts of metals to their surfaces. The resulting enhancement in photocatalytic activity is commonly attributed to a fast transfer of the excited electrons generated by photon absorption from the semiconductor to the metal, a step that prevents deexcitation back to the ground electronic state. Here we provide experimental evidence that suggests an alternative pathway that does not involve electron transfer to the metal but requires it to act as a catalyst for the recombination of the hydrogen atoms made via the reduction of protons on the surface of the semiconductor instead.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据