Recent progress with electrocatalysts for urea electrolysis in alkaline media for energy-saving hydrogen production,Catalysis Science & Technology

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Recent progress with electrocatalysts for urea electrolysis in alkaline media for energy-saving hydrogen production
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2020/02/05 , DOI: 10.1039/c9cy02618e
Xiujuan Sun _{1,

2,

3,

4,

5} , Rui Ding _{1,

2,

3,

4,

5}

Affiliation

The clean and renewable “hydrogen energy economy” era is coming. In this regard, the pathway for hydrogen production is of utmost importance. Recently, diligent urea (CO(NH₂)₂) electrolysis has been explored as a promising energy-saving avenue for sustainable hydrogen production in comparison with conventional water (H₂O) electrolysis because of the low cell voltage, remediation of urea-rich wastewater and abundant electrocatalysts. Numerous non-precious materials (especially nickel-based ones) show potential as electrocatalysts for urea electrolysis in alkaline media and massive efforts are underway to improve the kinetics and thermodynamics. In this review, we firstly introduce the fundamentals of the energy-saving urea electrolysis system. Next, the recent advances with electrocatalysts for urea electrolysis are summarized. Then, the relationship between structure and activity is discussed. Finally, the remaining challenges and the future outlook are pointed out for the development of advanced bifunctional electrocatalysts, new approaches for catalyst synthesis, solar-driven urea electrolysis and electrocatalytic mechanisms for Ni-free catalysts.

中文翻译：

用于碱性介质中尿素电解的电催化剂在节能制氢方面的最新进展

清洁和可再生的“氢能源经济”时代正在到来。在这方面，制氢途径至关重要。最近，与传统的水（H _2）相比，勤奋的尿素（CO（NH ₂）₂）电解已被视为可持续氢生产的有希望的节能途径。O）由于电池电压低，富尿素废水的补救和丰富的电催化剂而导致的电解。许多非贵重材料（尤其是镍基材料）显示出在碱性介质中作为尿素电解的电催化剂的潜力，并且正在进行大量努力来改善动力学和热力学。在本文中，我们首先介绍了节能尿素电解系统的基本原理。接下来，总结了用于尿素电解的电催化剂的最新进展。然后，讨论了结构与活动之间的关系。最后，指出了高级双功能电催化剂的开发，催化剂合成的新方法，太阳能驱动的尿素电解和无镍催化剂的电催化机理的剩余挑战和未来前景。

更新日期：2020-03-26

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