FANG Zhaoheng CHEN Jiayong Institute of Chemical Metallurgy
,
Academia Sinica
,
Beijing
,
China CHEN Jiayong Institute of Chemical Metallurgy
,
Academia Sinica
,
Zhongguancun
,
Beijing
,
China
金属学报(英文版)
The anodic behavior of synthetic nickel sulfides in sulfuric acid solutions was studied.When the anodes of Ni_3S_2 ,Ni_7S_6 and NiS are actively dissolved respectively,a solid layer forms on the electrode surface with its nature and composition depending on the potentials applied. Based on the electrochemical phenomena,phase and elemental compositions of the solid layer formed on the electrode surface were determined.The apparent number of electrons transfer- red during dissolution of Ni~(2+)was also measured.It can be considered that there are three parallel reactions ocurred on the electrode:the reaction with formation of HSO_4~- or SO_4~(2-), the reaction with formation of sulfides as intermediates and the reaction of Jorming elemental sulfur.With NiS_2 as an anode,formation of SO_4~(2-)or HSO_4~- can be considered as the only re- action occurred on the electrode.
关键词:
nickel sulfide
,
null
,
null
于姗
,
欧阳博
,
李治军
,
孟庆元
,
冯科
,
陈彬
,
佟振合
,
吴骊珠
影像科学与光化学
doi:10.7517/j.issn.1674-0475.2015.02.117
本文通过将硫化聚苯胺纳米管和镍盐混合煅烧,制得CN-NiS催化剂.通过X射线固体粉末衍射(XRD)、透射电子显微镜(TEM)和光电子能谱(XPS)表征,证实了CN-NiS催化剂的组成、结构及形貌特征.使用荧光素和三乙胺分别作为光敏单元和电子牺牲体,最优条件下,基于CN-NiS的光催化体系产氢效率可达18.6 mmol·g-1·h-1(λ=450nm).其产氢活性明显优于前驱体聚苯胺、硫化聚苯胺或镍盐,说明CN-NiS材料是一类较好的产氢催化剂.
关键词:
NiS
,
光催化产氢
,
荧光素
,
三乙胺
