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首页> 外文期刊>RSC Advances >Co(dmgH)2pyCl as a noble-metal-free co-catalyst for highly efficient photocatalytic hydrogen evolution over hexagonal ZnIn2S4
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Co(dmgH)2pyCl as a noble-metal-free co-catalyst for highly efficient photocatalytic hydrogen evolution over hexagonal ZnIn2S4

机译：CO（DMGH）2PYCL作为无金属无金属的共催化剂，用于高效的六角形Znin2S4上的高效光催化氢气进化

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Co(dmgH) _(2) pyCl/ZnIn _(2) S _(4) composites (dmgH = dimethylglyoxime and py = pyridine) with different amounts of Co(dmgH) _(2) pyCl loaded were prepared from hexagonal ZnIn _(2) S _(4) and Co(dmgH) _(2) pyCl via an impregnation method. The photocatalytic activity for hydrogen evolution over the as-prepared Co(dmgH) _(2) pyCl/ZnIn _(2) S _(4) composites under visible light irradiation was investigated. It was found that the hydrogen evolution over hexagonal ZnIn _(2) S _(4) can be significantly increased by loading Co(dmgH) _(2) pyCl as a co-catalyst. An optimum activity was achieved over 3.0 wt% Co(dmgH) _(2) pyCl/ZnIn _(2) S _(4) composite, with 1438.5 μmol hydrogen generated and a turnover number of 387 (based on Co(dmgH) _(2) pyCl) reached in 8 h visible light irradiation. This value is much higher than that obtained over Pt loaded ZnIn _(2) S _(4) under similar conditions, indicating that Co(dmgH) _(2) pyCl can be a highly efficient noble-metal-free co-catalyst for photocatalytic hydrogen evolution over hexagonal ZnIn _(2) S _(4) . The mechanism for the hydrogen evolution over the Co(dmgH) _(2) pyCl/ZnIn _(2) S _(4) composite was also proposed. This work paves a way to the development of highly efficient noble-metal-free photocatalytic systems for hydrogen evolution.
机译：CO（DMGH）_（2）PYCL / Znin _（2）S _（4）复合材料（DMGH =二甲基乙二肟和PY =吡啶），具有不同量的CO（DMGH）_（2）PICCL由六边形Znin _制备（2）S _（4）和CO（DMGH）_（2）PYCL通过浸渍方法。研究了在可见光照射下的制备的CO（DMGH）_（2）PYCl / Znin _（2）S _（4）复合材料上的氢催化活性。发现通过作为助催化剂的加载CO（DMGH）_（2）PICl，可以显着增加六方锌_（2）S _（4）的氢进化。在3.0wt％CO（DMGH）_（2）PYCL / Znin _（2）S _（4）复合材料中获得了最佳活性，产生1438.5μmol氢，营业额为387（基于CO（DMGH）_ （2）PYCL）达到8小时可见光辐照。该值远高于在类似条件下通过PT加载的Znin _（2）S _（4）获得的值，表明CO（DMGH）_（2）PYCL可以是高效的无金属无金属助催化剂六角形Znin _（2）S _（4）上的光催化氢气进化。还提出了CO（DMGH）_（2）β（2）β1（2）S _（4）复合材料的氢进化的机制。这项工作铺平了一种发展高效贵金属光催化系统的氢气进化。

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