Interface Engineering of NixSy@MnOxHy Nanorods to Efficiently Enhance Overall-Water-Splitting Activity and Stability

• DOI: 10.1007/s40820-022-00860-2
• Publication Date: 2022-05-03T18:03:16Z
• Authors: Pan Wang; Yuanzhi Luo; Gaixia Zhang; Zhangsen Chen; Hariprasad Rangan...; Shuhui Sun; Zhicong Shi
• Keywords: Nanorod; Oxygen evolution

Three-dimensional (3D) core-shell heterostructured NixSy@MnOxHy nanorods grown on nickel foam (NixSy@MnOxHy/NF) were successfully fabricated via a simple hydrothermal reaction and subsequent electrodeposition process. The NixSy@MnOxHy/NF shows outstanding bifunctional activity stability for hydrogen evolution oxygen reaction, as well overall-water-splitting performance. main origins are the interface engineering of NixSy@MnOxHy, shell-protection characteristic MnOxHy, 3D open nanorod structure, which remarkably endow electrocatalyst with high stability. Exploring highly active stable transition metal-based electrocatalysts has recently attracted extensive research interests achieving inherent activity, abundant exposed sites, rapid mass transfer, strong structure overall water splitting. Herein, an coupled strategy was applied to construct three-dimensional heterostructure electrocatalyst. synthesized facile followed by X-ray absorption fine spectra reveal that Mn-S bonds connect interfaces leading electronic interaction, improves intrinsic activities (OER). Besides, efficient protective shell, MnOxHy dramatically inhibits electrochemical corrosion at current densities, enhances potentials. Furthermore, not only exposes enriched but also accelerates electrolyte diffusion bubble desorption. Therefore, exhibits exceptional splitting, low overpotentials 326 356 mV OER 100 500 mA cm-2, respectively, along 150 h cm-2. it presents cell voltage 1.529 V 10 accompanied excellent cm-2 h. This work sheds light exploring strategy.