析氧
铱
化学
机制(生物学)
溶解
催化作用
化学工程
电化学
物理化学
有机化学
电极
认识论
工程类
哲学
作者
Anja Lončar,Daniel Escalera,Serhiy Cherevko,Nejc Hodnik
标识
DOI:10.1002/anie.202114437
摘要
The widespread utilization of proton exchange membrane (PEM) electrolyzers currently remains uncertain, as they rely on the use of highly scarce iridium as the only viable catalyst for the oxygen evolution reaction (OER), which is known to present the major energy losses of the process. Understanding the mechanistic origin of the different activities and stabilities of Ir-based catalysts is, therefore, crucial for a scale-up of green hydrogen production. It is known that structure influences the dissolution, which is the main degradation mechanism and shares common intermediates with the OER. In this Minireview, the state-of-the-art understanding of dissolution and its relationship with the structure of different iridium catalysts is gathered and correlated to different mechanisms of the OER. A perspective on future directions of investigation is also given.
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