A mixed oxide with the crystal structure of the DyMnO family, namely NdMnRuO, is reported active for the oxygen evolution reaction (OER) in acidic media. NdMnRuO displays high OER activity of 500 A g at 1.5 V. Moreover, is more stable than most Ru oxides reported to date, remaining active for more than 500 cycles between 1.1. and 1.7 V at low scan rate of 10 mV s. The high activity and stability are attributed to the Ru cations, as NdMnO exhibits very low OER activity. NdMnRuO has particularly short Ru–Ru distances of 2.60 Å, a value close to the Ru–Ru metallic distances around 2.642 Å. The high activity and durability of NdMnRuO for the OER are also demonstrated in a proton exchange membrane water electrolysis cell by producing a low-loaded anode electrode with 0.5 mgcm. The cell achieves 1.97 V at 0.5 A cm, consistent with the performances reported for Ru-based catalysts but with lower Ru loading. This performance is maintained during 100 h of operation. Additionally, NdMnRuO displays visible ORR activity in acidic media, recording an onset potential of 0.85 V at 0.1 mA cm. It is noteworthy to highlight the extreme rarity of bifunctional ORR/OER catalysts acidic media.

中文翻译：

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NdMn1.5Ru0.5O5，一种低Ru含量的酸性析氧反应高性能电催化剂

据报道，具有 DyMnO 族晶体结构的混合氧化物（即 NdMnRuO）在酸性介质中对析氧反应 (OER) 具有活性。 NdMnRuO 在 1.5 V 下表现出 500 A g-1 的高 OER 活性。此外，比迄今为止报道的大多数 Ru 氧化物更稳定，在 1.1 之间的 500 多个循环中保持活性。 10 mV s 的低扫描速率下为 1.7 V。高活性和稳定性归因于 Ru 阳离子，因为 NdMnO 表现出非常低的 OER 活性。 NdMnRuO 的 Ru-Ru 距离特别短，为 2.60 Å，该值接近 Ru-Ru 金属距离约 2.642 Å。通过生产 0.5 mgcm 的低负载阳极电极，NdMnRuO 在 OER 中的高活性和耐久性也在质子交换膜水电解池中得到了证明。该电池在 0.5 A cm 下达到 1.97 V，与 Ru 基催化剂报道的性能一致，但 Ru 负载量较低。该性能在 100 小时的运行过程中保持不变。此外，NdMnRuO 在酸性介质中表现出可见的 ORR 活性，在 0.1 mA cm 下记录的起始电位为 0.85 V。值得注意的是，双功能 ORR/OER 催化剂酸性介质极为罕见。