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首页> 外文期刊>Catalysis science & technology >Tri-functional molecular relay to fabricate size-controlled CoO(x)nanoparticles and WO(3)photoanode for an efficient photoelectrochemical water oxidation
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Tri-functional molecular relay to fabricate size-controlled CoO(x)nanoparticles and WO(3)photoanode for an efficient photoelectrochemical water oxidation

机译：Tri-functional分子继电器制造size-controlled首席运营官(x)纳米颗粒我们(3)为一个高效的光电阳极光电化学水氧化

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摘要

Heterojunction and element doping to couple light-harvesting semiconductors with catalytic materials have been widely employed for photoelectrochemical (PEC) water splitting. However, both suffer from serious electron-hole recombination, although the intimate interactions of the components is propitious for the charge transfer. In addition, the densely packed surface screens the active core from the catalytic media, leading to restricted performance. Here, a CoOx-decorated WO(3)electrode (C-M2P-CoOx/WO3) was engineeredviathe organic linkage 3,3-diphosphonopropanate (C-M2P) for PEC water oxidation in a neutral medium. The C-M2P functions to control the colloidal CoO(x)size and bridges the catalytic center and the WO(3)anode that allows an enhanced carrier density N(d)to reach up to 1.9 x 10(21)cm(-3). Therefore, a strengthened charge separation was obtained and was further evidenced by the open circuit voltage decay (OCVD) measurements. The photovoltage decay revealed that the improved photoexcited electrons transfer could be attributed to the effective passivation of surface trap states. This brought about a generation of unexpected photocurrent as high as 3.5 mA cm(-2), and an incident photon-to-electron conversion (IPCE) reaching up to 71% under a combination of visible-light irradiation and applied bias. Together with the dramatically shortened charge lifetime and a large transient photovoltage on the assembled electrode, a proposed exciton transfer mechanism was established.
机译：异质结和元素掺杂的夫妇聚光半导体与催化材料被广泛用于光解水制氢研究光电化学(压电陶瓷)。然而,患有严重的电子空穴重组,虽然亲密互动组件是吉祥的转移。屏幕从催化媒体活动的核心,导致限制性能。CoOx-decorated我们(3)电极(C-M2P-CoOx / WO3)是engineeredviathe有机联系3, 3-diphosphonopropanate (C-M2P)压电陶瓷水在中性介质氧化。功能控制胶体首席运营官(x)和大小的催化中心和桥梁(3)阳极允许一个增强载体密度N (d)达到1.9 x 10(21)厘米(3)。加强了电荷分离得到进一步证明了开路电压衰变(过程)测量。表明改进的光激的电子转移可以归因于有效钝化表面陷阱。一代的意想不到的光电流马高3.5厘米(2),和一个事件photon-to-electron转换(IPCE)到达在可见光的组合的71%辐照和应用的偏见。大大缩短了一生和收费在组装大型瞬态光电压电极,提出了激子转移机制成立。

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