Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 315201, Ningbo, Zhejiang, China.
University of Chinese Academy of Sciences, 100049, Beijing, China.
Nat Commun. 2019 Jan 11;10(1):162. doi: 10.1038/s41467-018-08144-3.
The development of active, acid-stable and low-cost electrocatalysts for oxygen evolution reaction is urgent and challenging. Herein we report an Iridium-free and low ruthenium-content oxide material (CrRuO) derived from metal-organic framework with remarkable oxygen evolution reaction performance in acidic condition. It shows a record low overpotential of 178 mV at 10 mA cm and maintains the excellent performance throughout the 10 h chronopotentiometry test at a constant current of 10 mA cm in 0.5 M HSO solution. Density functional theory calculations further revealed the intrinsic mechanism for the exceptional oxygen evolution reaction performance, highlighting the influence of chromium promoter on the enhancement in both activity and stability.
开发活性、耐酸和低成本的电催化剂对于氧气析出反应至关重要且具有挑战性。在此，我们报道了一种无铱且低钌含量的氧化物材料（CrRuO），其源自金属有机骨架，在酸性条件下具有显著的氧气析出反应性能。它在 10 mA cm 时表现出创纪录的低过电势 178 mV，并在 0.5 M HSO 溶液中 10 mA cm 的恒定电流下经过 10 小时恒电流计时测试后仍保持优异的性能。密度泛函理论计算进一步揭示了其具有优异氧气析出反应性能的内在机制，突出了铬助剂对活性和稳定性提高的影响。
