Hydrogen gas production generated from carbon-free molecules while utilizing solar energy provided a pathway for zero carbon emission energy. In photocatalytic hydrogen gas production, alcohol and oxygenated compounds as sacrificial agents are often added to accelerate the water splitting process while simultaneously decomposing to form H₂ and CO₂. However, the generation of CO₂ requires an additional measure to curb carbon from being released into the atmosphere. This study evaluated the performance of TiO₂ photocatalysts to generate hydrogen from NH₃ solution as carbon-free molecules. The investigation is extended to alkylamines compounds as sacrificial agents. H₂ is linearly produced from NH₃ when using Pd/TiO₂; however, the rate is reduced after a prolonged photocatalytic reaction. Alkylamines molecules are more susceptible for H₂ production than NH₃, with the reactivity increased from NH₃ < triethylamine < diethylamine < ethylamine. Comparative analysis was also conducted on the amount of H₂ and CO₂ gases released from alkylamines and alcohols to indicate nitrogen-containing compounds viability as sacrificial agents for carbon-emission free sacrificial agents in photocatalytic water splitting reaction.

Graphical Abstract

中文翻译：

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NH3 和烷基胺光催化制氢：实现零碳排放能源的途径

在利用太阳能的同时由无碳分子产生氢气，为零碳排放能源提供了途径。在光催化氢气生产中，通常添加醇和含氧化合物作为牺牲剂以加速水分解过程，同时分解形成H ₂和CO ₂。然而，CO ₂的产生需要额外的措施来抑制碳释放到大气中。本研究评估了 TiO ₂光催化剂从 NH ₃溶液中以无碳分子形式产生氢气的性能。研究扩展到烷基胺化合物作为牺牲剂。H ₂当使用 Pd/TiO ₂时，由 NH ₃线性生成；然而，在长时间的光催化反应后，该速率会降低。烷基胺分子比NH _{3更容易产生H 2}，反应性从NH ₃  <三乙胺<二乙胺<乙胺增加。_{还对从烷基胺和醇释放的 H 2}和 CO ₂气体的量进行了比较分析，以表明含氮化合物在光催化水分解反应中作为无碳排放牺牲剂的牺牲剂的可行性。

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