Reaction mechanism of H2 generation for H2O/Zn/Fe3O4 system
Reaction mechanism of H2 generation for H2O/Zn/Fe3O4 system
复制标题
H2O/Zn/Fe3O4体系产氢反应机理
DOI：
10.1016/s0360-3199(02)00012-5
复制
发表时间：
2002
影响因子：
7.2
通讯作者：
T. Sano
中科院分区：
文献类型：
--
作者：
H. Kaneko;N. Kojima;N. Hasegawa;M. Inoue;Reiko Uehara;N. Gokon;Y. Tamaura;T. Sano
从Zn迁移率的角度对H2O/Zn/Fe 3 O 4水分解体系的反应机理提出了几点看法。Zn在Fe 3 O 4表面上的气相沉积通过分别设置Zn和Fe 3 O 4的H2生成反应来证实。XPS测试表明，在与水蒸气反应之前，Fe_3 O_4表面被Zn覆盖。快速反应过程已被支持的Zn沉积，这大大扩大了准备与水蒸气反应的Zn/Fe 3 O 4对的网站的数量。为了防止Zn从系统中蒸发，用额外的Fe 3 O 4覆盖Zn/Fe 3 O 4混合物以捕获Zn蒸气。这导致99.5%的改进的H2产率。
Several ideas on the reaction mechanism of H2O/Zn/Fe3O4water splitting system were considered from the aspect of Zn mobility. The vapor deposition of Zn onto the Fe3O4surface was confirmed by H2generation reaction with Zn and Fe3O4set separately. XPS measurements suggested that the surface of Fe3O4is covered by Zn before the reaction with steam. The rapid reaction process has been supported by this Zn deposition, which greatly enlarges the number of sites of Zn/Fe3O4pair that is ready to react with steam. In order to keep the Zn from vaporizing off the system, the Zn/Fe3O4mixture was covered with additional Fe3O4to capture the Zn vapor. This resulted in improved H2yield of 99.5%.