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首页> 外文期刊>Journal of Colloid and Interface Science >Hierarchical fabrication of hollow Co2P nanocages coated with ZnIn2S4 thin layer: Highly efficient noble-metal-free photocatalyst for hydrogen evolution
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Hierarchical fabrication of hollow Co2P nanocages coated with ZnIn2S4 thin layer: Highly efficient noble-metal-free photocatalyst for hydrogen evolution

机译：Znin2S4薄层涂覆空心CO2P纳米空腔的分层制作：高效贵金属光催化剂用于氢进化

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The directional synthesis of transition metal phosphides was considered to be an effective strategy to solve the overdependence of noble metals on photocatalytic hydrogen evolution (PHE) reactions. Inspiringly, this work reported a facile method for constructing hollow Co2P nanocages (Co2P NCGs) that derived from ZIF-67 by calcining and phosphiding procedure in nitrogen atmosphere to act as non-noble metal cocatalysts. Followed with further coating thin-layered ZnIn2S4 (ZIS) on the surface of Co2P NCGs through a hydrothermal reaction, the hierarchical robust Co2P/ZnIn2S4 nanocages (Co2P/ZIS NCGs) were then delicately fabricated as efficient photocatalysts for PHE reactions. The uniquely hollow structure of Co2P NCGs largely diffused the photogenerated chargers that induced from ZIS and the closely interfacial contact significantly promoted the separation and transfer of electrons from ZIS to Co2P according to density functional theory (DFT) calculation, synergistically resulting in an efficient hydrogen generation performance. PHE results showed that an efficient H-2 evolution rate of 7.93 mmol/g/h over 10% Co2P/ZIS NCGs was achieved, about 10 times higher than that of pristine ZnIn2S4. More importantly, the hierarchically hollow Co2P/ZIS NCGs exhibited ascendant PHE activity in comparison with that of 1% noble metal (Pt, Au, Ag) loaded ZnIn2S4 with superior sustainability, all indicating the efficient and stable photocatalysts of Co2P/ZIS NCGs for PHE reactions. (C) 2021 Elsevier Inc. All rights reserved.
机译：过渡金属磷化物的定向合成被认为是解决贵金属对光催化析氢反应过度依赖的有效策略。令人鼓舞的是，这项工作报告了一种简便的方法来构建空心Co2P纳米笼（Co2P NCG），该笼源于ZIF-67，通过在氮气气氛中煅烧和磷化过程来充当非贵金属辅助催化剂。随后，通过水热反应在Co2P NCG表面进一步涂覆薄层ZnIn2S4（ZIS），然后精细地制备了分级坚固的Co2P/ZnIn2S4纳米笼（Co2P/ZIS NCG），作为PHE反应的高效光催化剂。根据密度泛函理论（DFT）计算，Co2P NCG独特的中空结构在很大程度上扩散了ZIS诱导的光生充电器，紧密的界面接触显著促进了电子从ZIS到Co2P的分离和转移，协同产生了高效的制氢性能。PHE结果表明，在10%Co2P/ZIS NCGs条件下，有效的H-2释放速率为7.93mmol/g/H，约为纯ZnIn2S4的10倍。更重要的是，与负载1%贵金属（Pt、Au、Ag）的ZnIn2S4相比，分级中空Co2P/ZIS NCGs表现出更高的PHE活性，具有更好的可持续性，所有这些都表明Co2P/ZIS NCGs对PHE反应具有高效和稳定的光催化剂。（c）2021爱思唯尔公司保留所有权利。

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