Interfacial coupling of sea urchin-like (Mo4O11-MoS2-VO2) promoted electron redistributions for significantly boosted hydrogen evolution reaction

• Published in: Chinese chemical letters 2023-04, Vol.34 (4), p.107724, Article 107724
• Main Authors: Xing, Yupeng, Li, Na, Qiu, Shipeng, Zhao, Gang, Hao, Shuhua, Zhang, Baojie
• Format: Article
• Language: English
• Subjects: Electron redistribution; HER; Hierarchical sea urchin-like (Mo4O11-MoS2-VO2); Interfacial coupling; Non-noble metal
• ISSN: 1001-8417; 1878-5964
• DOI: 10.1016/j.cclet.2022.08.004

Developing efficient electrocatalysts for hydrogen evolution reaction (HER) is of great importance in contemporary water electrolysis technology. Here, a novel hierarchically sea urchin-like electrocatalyst (Mo4O11-MoS2-VO2) is synthesized by hydrothermal deposition and post-annealing strategy. The optimized electrocatalyst behaves as a high active hydrogen evolution electrode in 0.5 mol/L H2SO4. This electrode needs overpotential of only 43 mV to achieve 10 mA/cm2 with a Tafel slope of 37 mV/dec and maintains its catalytic activity for at least 36 h. Better than most previously reported non-noble metal electrocatalysts anchored on carbon cloth. It is worth mentioning that the hierarchical sea urchin-like structure promotes the redistribution of electrons and provides more catalytic active sites. This strategy shows a way for the construction of inexpensive non-noble metal electrocatalysts in the future. Herein, an efficient sea urchin-like electrocatalyst (Mo4O11-MoS2-VO2) is synthesized with hydrothermal deposition and post-annealing strategy. The catalytically active area was expanded, and the intrinsic activity toward HER was significantly improved. [Display omitted]