A significant advancement has been achieved in the field of energy conversion devices, particularly water splitting, with a metal–organic framework (MOF) as a promising candidate. The strategically optimized MOF exhibits astounding electrocatalytic efficiency towards oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER). Here, in this work, we have developed V-incorporated Ni–BTC, which shows promising catalytic performance towards the OER. Incredibly, it only requires a low overpotential of 250 mV to achieve a current density of 10 mA cm⁻², which even outperforms the state-of-the-art RuO₂ catalyst. An inferior Tafel slope value of 50 mV dec⁻¹ indicates favourable reaction kinetics and electron transfer efficiency, making it genuinely a superior electrocatalyst for the OER in 1 M KOH solution. Moreover, V incorporation leads to an increase in the electrocatalytic active surface area and thus provides more active sites for the OH⁻/O₂ adsorption/desorption process. A 20-fold increase in TOF values (1784.77 h⁻¹) was also observed after the incorporation of V. Moreover, the NiV-based MOF demonstrates outstanding stability, further confirming its potential importance for sustainable electrochemical energy storage and conversion devices.

中文翻译：

---

策略性地将 V 引入棒状 Ni-MOF 中，作​​为水氧化反应的有效催化剂

能量转换器件领域，特别是水分解领域，已经取得了重大进展，其中金属有机框架（MOF）作为有希望的候选者。经过策略优化的 MOF 对析氧反应 (OER) 和析氢反应 (HER) 表现出惊人的电催化效率。在这项工作中，我们开发了掺有 V 的 Ni-BTC，它对 OER 显示出有前景的催化性能。令人难以置信的是，它只需要250 mV的低过电势即可实现10 mA cm ^-2的电流密度，这甚至优于最先进的RuO ₂催化剂。 50 mV dec ^-1的较低塔菲尔斜率值表明良好的反应动力学和电子转移效率，使其成为真正的 1 M KOH 溶液中 OER 的优异电催化剂。此外，V的掺入导致电催化活性表面积的增加，从而为OH ^- /O ₂吸附/解吸过程提供更多的活性位点。掺入V后， TOF值（1784.77 h ^-1 ）增加了20倍。此外，NiV基MOF表现出出色的稳定性，进一步证实了其对于可持续电化学能量存储和转换装置的潜在重要性。