Impact of the Type of Reactor and the Catalytic Conditions on the Photocatalytic Production of Hydrogen Using a Fully Noble‐Metal‐Free System,ChemistrySelect

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Impact of the Type of Reactor and the Catalytic Conditions on the Photocatalytic Production of Hydrogen Using a Fully Noble‐Metal‐Free System
ChemistrySelect ( IF 1.9 ) Pub Date : 2018-03-15 , DOI: 10.1002/slct.201800289
Immanuel Reim ₁ , Benjamin Wriedt ₂ , Ümit Tastan ₂ , Dirk Ziegenbalg ₂ , Michael Karnahl ₁

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For efficient photocatalytic hydrogen production not only the photocatalytic system itself, but also the reactor design and appropriate catalytic conditions play a central role for achieving high overall activity and long lifetimes. To investigate these points further, a fully noble‐metal‐free system for the light‐driven reduction of protons to hydrogen, consisting of a copper photosensitizer and an iron carbonyl catalyst, was chosen as a model. The traditional batch reactor was replaced by a semi‐batch photoreactor with a continuously perfused gas phase in combination with in situ gas chromatography. This allowed for the time resolved analysis of all gases formed and enabled a systematic investigation of the impact of different light sources, light intensities and carrier gases. The results revealed a significant change in activity due to CO removal from the catalyst caused by the continuous gas flow. This effect can be counteracted by supplying additional CO through the gas phase.

中文翻译：

使用完全无贵金属的系统，反应器类型和催化条件对氢的光催化生产的影响

为了有效地生产光催化氢，不仅光催化系统本身，而且反应器的设计和适当的催化条件在实现高总体活性和长寿命方面都起着核心作用。为了进一步研究这些问题，我们选择了一种由铜光敏剂和羰基铁催化剂组成的完全无贵金属的光驱动质子还原为氢的系统。传统的间歇式反应器被具有连续灌注气相和原位结合的半间歇式光反应器所取代气相色谱法。这样就可以对所有形成的气体进行时间分辨分析，并能够系统地研究不同光源，光强度和载气的影响。结果表明，由于连续气流导致的从催化剂中除去CO，活性发生了显着变化。可以通过在气相中提供额外的CO来抵消这种影响。

更新日期：2018-03-15

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