A cobalt-based polyoxometalate catalyst for efficient visible-light-driven H2 evolution from water splitting
A cobalt-based polyoxometalate catalyst for efficient visible-light-driven H2 evolution from water splitting
复制标题
DOI：
10.1016/j.catcom.2015.01.032
复制
发表时间：
2015-04
影响因子：
3.7
通讯作者：
Weiming Wu;Teng Teng-Teng;Xiaoyuan Wu;Xue-Jing Dui;Lei Zhang;Jinhua Xiong;Ling Wu;Canzhong Lu
中科院分区：
文献类型：
--
作者：
Weiming Wu;Teng Teng-Teng;Xiaoyuan Wu;Xue-Jing Dui;Lei Zhang;Jinhua Xiong;Ling Wu;Canzhong Lu
采用简单水溶液法合成了钴基多金属氧酸盐Na7H10[Co6(H2O)2(PW9O34)2(PW6O26)]·30H2O。以伊红Y为光敏剂，三乙醇胺为电子供体，对水裂解中可见光驱动的h2析出具有催化活性。h2o2的初始析出速率为141 μmol h−1，高于Co2 +的初始析出速率（55 μmol h−1）。有效的催化活性归因于样品中的[B-PW9O34]9−单元作为电子发射器加速电荷转移。此外，还提出了一种可能的机制来解释该体系中水裂解产生h22的演化。
A cobalt-based polyoxometalate, Na7H10[Co6(H2O)2(PW9O34)2(PW6O26)]·30H2O, was synthesized by a simple aqueous solution method. It showed catalytic activity for the visible-light-driven H2evolution from water splitting with eosin Y as the photosensitizer and triethanolamine as the electron donor. The initial rate of the H2evolution was 141 μmol h− 1, which was higher than that of Co2 +cations (55 μmol h− 1). The efficient catalytic activity was attributed to that the [B-PW9O34]9 −units in the sample act as electron transmitters to accelerate charge transfer. Moreover, a possible mechanism was proposed to explain the H2evolution from water splitting in the present system.