Xu Shengjie, Hu Jiahui, Huang Longhui, Liu Yu, Zheng Xinyu, Jiang Deli
School of Chemistry and Chemical Engineering, Jiangsu University, Xuefu Road 301, Zhenjiang 212013, China.
School of Chemistry and Chemical Engineering, Jiangsu University, Xuefu Road 301, Zhenjiang 212013, China.
J Colloid Interface Sci. 2022 Jun;615:327-334. doi: 10.1016/j.jcis.2022.01.111. Epub 2022 Jan 19.
Interface engineering is an effective strategy to regulate the oxygen adsorption strength and accelerate the kinetics of oxygen evolution reaction (OER) catalyst by using the synergistic effect and electronic coupling between different metals. However, the design and demonstration of efficient and strongly coupled interfaces remains a bottleneck in the progress of efficient and durable OER catalysts. Herein, we designedly anchored RuSe nanoparticles to CoSe nanosheet arrays support on nickel foam (NF) to fabricate a RuSe-CoSe nanosheet arrays with robust structure and strong electron coupling. Co-MOF was used as a template to conduce Ru ion exchange and then the precursor was selenized at low temperature to obtain RuSe modified CoSe nanosheet arrays. Thanks to the strong electron coupling between Ru with Co and the unique nanoarray structure, RuSe-CoSe exhibits excellent OER performance with ultra-low overpotential of 200 mV at current density of 10 mA cm, and the performance did not degrade significantly during 100 h of continuous operation. Furthermore, the assembledRuSe-CoSe (+)//Pt/C (-) can reach 50 mA cm in a two-electrode system with a low battery voltage of 1.61 V, which is superior to the commercial RuO (+)//Pt/C (-) (1.79 V) electrode. This work provides an effective avenue for the design of highly active and durable electrocatalysts.
界面工程是一种有效的策略，通过利用不同金属之间的协同效应和电子耦合来调节氧吸附强度并加速析氧反应（OER）催化剂的动力学。然而，高效且强耦合界面的设计与论证仍然是高效耐用的OER催化剂发展进程中的一个瓶颈。在此，我们特意将RuSe纳米颗粒锚定在泡沫镍（NF）上的CoSe纳米片阵列载体上，以制备具有坚固结构和强电子耦合的RuSe-CoSe纳米片阵列。以Co-MOF为模板进行Ru离子交换，然后将前驱体在低温下硒化，得到RuSe修饰的CoSe纳米片阵列。得益于Ru与Co之间的强电子耦合以及独特的纳米阵列结构，RuSe-CoSe在10 mA cm的电流密度下表现出优异的OER性能，过电位超低，仅为200 mV，并且在连续运行100小时期间性能没有明显下降。此外，组装的RuSe-CoSe(+)//Pt/C(-)在两电极系统中，电池电压低至1.61 V时，电流密度可达到50 mA cm，优于商业RuO(+)//Pt/C(-)（1.79 V）电极。这项工作为设计高活性和耐用的电催化剂提供了一条有效途径。
