Affordable and abundant sources of green hydrogen can give a large impetus to the Energy Transition. While conventional water electrolysis has positioned itself as a prospective candidate for this purpose, it lacks cost competitiveness. Hybrid water electrolysis (HWE) has been praised for its ability to address the issues of conventional water electrolysis due to its decreased energy requirements and its ability to generate value‐added products, among other advantages. In this perspective, we discuss the challenges related to the applicability of HWE, using the glycerol oxidation reaction as an example, and we identify pitfalls often found in the literature. Reported catalysts, especially those based on abundant materials, suffer from a severe selectivity‐activity tradeoff, hampering their industrial applicability due to large costs associated with product separation and purification. Additionally, testing electrocatalysts under conditions that are relevant for their applications is encouraged, yet these conditions are largely unknown, as in‐depth knowledge of the catalytic mechanisms is largely missing. Lastly, an opportunity to increase the amount of interdisciplinary research concerning both the engineering requirements and financial performance of HWE is discussed. Increased focus on these objectives may boost the development of HWE on an industrial scale.

中文翻译：

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碱性混合水电解槽中的阳极反应：活性与选择性

负担得起且丰富的绿色氢源可以极大地推动能源转型。虽然传统的水电解已将自己定位为此目的的潜在候选者，但它缺乏成本竞争力。混合水电解（HWE）因其能够解决传统水电解的问题而受到赞誉，因为它具有降低能源需求和产生增值产品的能力等优势。从这个角度来看，我们以甘油氧化反应为例讨论了与 HWE 适用性相关的挑战，并确定了文献中经常发现的陷阱。已报道的催化剂，特别是那些基于丰富材料的催化剂，面临严重的选择性与活性权衡，由于与产物分离和纯化相关的巨大成本，阻碍了它们的工业应用。此外，鼓励在与其应用相关的条件下测试电催化剂，但这些条件很大程度上是未知的，因为很大程度上缺乏对催化机制的深入了解。最后，讨论了增加有关 HWE 的工程要求和财务绩效的跨学科研究数量的机会。对这些目标的更多关注可能会促进 HWE 在工业规模上的发展。