Wang Yufeng, Ye Qing, Lin Lu, Zhao Yanxia, Cheng Yongliang
Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China.
Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China.
J Colloid Interface Sci. 2023 Dec;651:1008-1019. doi: 10.1016/j.jcis.2023.08.014. Epub 2023 Aug 4.
Designing and fabricating highly competent and inexpensive electrocatalysts are highly desirable for application in electrocatalytic water splitting. In this study, we synthesized NiFeRu/C nanofibers and Ru, Fe dual-doped NiP (Ru, Fe-NiP)/C nanofibers as complementary electrocatalysts for overall water splitting through electrospinning, carbonization, and phosphorization treatment, respectively. The NiFeRu/C nanofibers and Ru, Fe-NiP/C nanofibers showed high hydrogen evolution reaction and oxygen evolution reaction activity, respectively, due to the presence of numerous exposed active sites and optimized adsorption capacity for the reaction intermediates contributed by the synergistic interaction among different metal components in the electrocatalysts. Hence, the assembled asymmetrical electrolytic cell effectively promoted overall water splitting, requiring a voltage of 1.569, 1.744, and 1.872 V to achieve a current density of 100, 500, and 1,000 mA cm, respectively, and it was better than Pt/C||IrO. Additionally, the electrolytic cell could work at 500 mA cm for 100 h without any noticeable deterioration in activity, which indicated that it was durable at high current density. In this study, we described a novel method for designing highly efficient electrocatalysts for overall water splitting.
设计和制造高性能且廉价的电催化剂对于电催化水分解应用而言是非常必要的。在本研究中，我们分别通过静电纺丝、碳化和磷化处理，合成了NiFeRu/C纳米纤维以及Ru、Fe双掺杂NiP（Ru, Fe-NiP）/C纳米纤维，作为用于全水分解的互补电催化剂。NiFeRu/C纳米纤维和Ru, Fe-NiP/C纳米纤维分别表现出高析氢反应和析氧反应活性，这归因于存在大量暴露的活性位点以及电催化剂中不同金属组分之间的协同相互作用对反应中间体的优化吸附能力。因此，组装的不对称电解池有效地促进了全水分解，分别需要1.569、1.744和1.872 V的电压来实现100、500和1000 mA cm的电流密度，并且它比Pt/C||IrO更好。此外，该电解池可以在500 mA cm下工作100小时而活性没有任何明显下降，这表明它在高电流密度下是耐用的。在本研究中，我们描述了一种设计用于全水分解的高效电催化剂的新方法。
