Proton exchange membrane water electrolysis (PEMWE) is a promising technology for green hydrogen production, although its widespread development with state‐of‐the‐art loadings is threatened by the scarcity of iridium (Ir). Homogeneous dispersion of Ir in an immiscible electro‐ceramic matrix can enhance catalytic mass activity and structural stability. The study presents IrySn0.9(1−y)Sb0.1(1−y)Ox solid solutions produced by highly scalable flame spray pyrolysis (FSP) process as efficient anode electrocatalysts for PEMWE, containing only 0.2 mg cm−2 of Ir in the catalyst layer (CL). Intense mixing of metal vapor and large thermal gradients in the precursor‐derived high‐temperature flame aids stabilizing sub‐nanoscale entropic mixing within self‐preserved 4–6 nm particles. Detailed investigations confirm that the one‐step prepared solid solution electrocatalysts exhibit up to fourfold higher activity toward the oxygen evolution reaction (OER) compared to Ir black. The anode of a PEMWE utilizing this catalyst exhibits high performance and stability over 2000 h but with tenfold lower Ir loading than the state‐of‐art.

中文翻译：

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用于低铱含量质子交换膜水电解槽的快速可扩展一步法催化剂生产


质子交换膜水电解 （PEMWE） 是一项很有前途的绿色氢气生产技术，尽管其以最先进的负载量进行的广泛发展受到铱 （Ir） 稀缺性的威胁。Ir 在不混溶的电陶瓷基体中的均匀分散可以提高催化质量活性和结构稳定性。该研究提出了通过高度可扩展的火焰喷雾热解 （FSP） 工艺生产的 IrySn0.9（1−y）Sb0.1（1−y）Ox 固体溶液作为 PEMWE 的高效阳极电催化剂，在催化剂层 （CL） 中仅含有 0.2 mg cm-2 的 Ir。金属蒸气的强烈混合和前驱体衍生的高温火焰中的大热梯度有助于稳定自保存的 4-6 nm 颗粒内的亚纳米级熵混合。详细研究证实，与 Ir 黑相比，一步法制备的固溶体电催化剂对析氧反应 （OER） 的活性高出四倍。使用这种催化剂的 PEMWE 阳极在 2000 小时内表现出高性能和稳定性，但 Ir 负载比最先进的低 10 倍。