A Solar to Chemical Strategy: Green Hydrogen as a Means, Not an End,Global Challenges

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A Solar to Chemical Strategy: Green Hydrogen as a Means, Not an End
Global Challenges ( IF 4.4 ) Pub Date : 2023-11-20 , DOI: 10.1002/gch2.202300185
Gabriel A A Diab ₁ , Marcos A R da Silva ₁ , Guilherme F S R Rocha ₁ , Luis F G Noleto ₁ , Andrea Rogolino ₂ , João P de Mesquita _{1,

3} , Pablo Jiménez-Calvo _{4,

5} , Ivo F Teixeira ₁

Affiliation

Green hydrogen is the key to the chemical industry achieving net zero emissions. The chemical industry is responsible for almost 2% of all CO₂ emissions, with half of it coming from the production of simple commodity chemicals, such as NH₃, H₂O₂, methanol, and aniline. Despite electrolysis driven by renewable power sources emerging as the most promising way to supply all the green hydrogen required in the production chain of these chemicals, in this review, it is worth noting that the photocatalytic route may be underestimated and can hold a bright future for this topic. In fact, the production of H₂ by photocatalysis still faces important challenges in terms of activity, engineering, and economic feasibility. However, photocatalytic systems can be tailored to directly convert sunlight and water (or other renewable proton sources) directly into chemicals, enabling a solar-to-chemical strategy. Here, a series of recent examples are presented, demonstrating that photocatalysis can be successfully employed to produce the most important commodity chemicals, especially on NH₃, H₂O₂, and chemicals produced by reduction reactions. The replacement of fossil-derived H₂ in the synthesis of these chemicals can be disruptive, essentially safeguarding the transition of the chemical industry to a low-carbon economy.

中文翻译：

太阳能到化学战略：绿色氢作为手段，而不是目的

绿色氢能是化工行业实现净零排放的关键。化学工业排放的CO 2 几乎占所有CO ₂排放量的2%，其中一半来自简单大宗化学品的生产，例如NH ₃ 、H ₂ O ₂ 、甲醇和苯胺。尽管由可再生能源驱动的电解正在成为供应这些化学品生产链所需的所有绿色氢的最有前途的方式，但在这篇综述中，值得注意的是，光催化路线可能被低估，并且可以为这些化学品带来光明的未来。这个话题。事实上，光催化生产H ₂在活性、工程和经济可行性方面仍然面临着重要的挑战。然而，光催化系统可以定制为直接将阳光和水（或其他可再生质子源）直接转化为化学品，从而实现太阳能转化为化学品的策略。这里介绍了一系列最近的例子，证明光催化可以成功地用于生产最重要的商品化学品，特别是 NH ₃ 、H ₂ O ₂和还原反应产生的化学品。在这些化学品的合成中替代化石衍生的 H ₂可能具有破坏性，从根本上保障了化学工业向低碳经济的转型。

更新日期：2023-11-20

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