期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 119, 期 13, 页码 7207-7214出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp512907g
关键词
-
资金
- U.S. Department of Energy [DE-SC0004954]
- U.S. Department of Energy (DOE) [DE-SC0004954] Funding Source: U.S. Department of Energy (DOE)
The Ni/NiO core/shell structure is one of the most efficient cocatalysts for solar water splitting when coupled with suitable semiconducting oxides. It has been shown that pretreated Ni/NiO core/shell structures are more active than pure Ni metal, pure NiO, or mixed dispersion of Ni metal and NiO nanoparticles. However, Ni/NiO core/shell structures on TiO2 are only able to generate H-2 but not O-2 in aqueous water. The nature of the hydrogen evolution reaction in these systems was investigated by correlating photochemical H-2 production with atomic-resolution structure determined with aberration-corrected electron microscopy. It was found that the core/shell structure plays an important role for H-2 generation but the system undergoes deactivation due to a loss of metallic Ni. During the H-2 evolution reaction, the metal core initially formed partial voids which grew, and eventually all the Ni diffused out of the core/shell into solution leaving an inactive hollow void/NiO shell. The H-2 evolution was generated by a photochemical reaction involving photocorrosion of Ni metal.
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