关键字：electrocatalyst, hydrogen evolution reaction, interfacial effect, microwave, nanocluster

摘要：Regulating the metal-support interaction of the anchored metal nanoclusters is recognized as valid approach to optimize the electrocatalytic performance through tuning the interfacial electronic structure. However, developing novel support and understanding the interfacial electron accumulation on modulating the reaction kinetics are still elusive. Herein, highly-dispersed Ruthenium (Ru) nanoclusters anchored onto phosphorous doped molybdenum boride (Ru/P-MoB) is developed through ultrafast microwave-plasma (60 s) approach. The synthesized Ru/P-MoB impressively promote the hydrogen evolution with low overpotentials of 34, 45, and 40 mV to drive 10 mA cm-2 in alkaline freshwater, alkaline seawater and acid media. Specially, it presents superior turnover frequency and mass/specific activity relative to Pt/C, Ru/C, and Ru/MoB. Moreover, the anion exchange membrane (AEM) electrolyzer cell based on Ru/P-MoB can achieve 500 and 1000 mA cm-2 with small voltages of 1.71 and 1.78 V with good durability. Experimental and density functional theoretical (DFT) analysis reveal that the strong metal-support interactions (RuMo and RuP bonds) with generated interfacial electron-enriched Ru, and then favoring the water-molecule adsorption/dissociation and optimal H intermediate adsorption free energy. This work provides novel designing avenue to exploit electrocatalysts with outstanding catalytic performance under high current density at practical high-temperature. The interfacial electron-enriched Ru endows the synthesized Ru/P-MoB with excellent electrocatalytic performance for HER in alkaline freshwater/seawater and acid media. Moreover, the AEM electrolyzer cell based on Ru/P-MoB can achieve 500 and 1000 mA cm-2 with small voltages of 1.71 and 1.78 V with good durability.image

卷号：14

期号：8

是否译文：否