Construction of RuO2-Ru/MoO2@carbon cloth bifunctional electrocatalyst for efficient overall water splitting

• Published in: Rare metals 2024-10, Vol.43 (10), p.5095-5104
• Main Authors: Cai, Jia-Lin, Fan, Jing-Yi, Zhang, Xu-Dong, Xie, Xin, Tian, Wan-Yu, Zhang, Xin-Gang, Ding, Jie, Liu, Yu-Shan
• Format: Article
• Language: English
• Subjects: Biomaterials; Chemistry and Materials Science; Energy; Materials Engineering; Materials Science; Metallic Materials; Nanoscale Science and Technology; Original Article; Physical Chemistry
• ISSN: 1001-0521; 1867-7185
• DOI: 10.1007/s12598-024-02772-z

Efficient bifunction electrocatalyst is extremely interesting for electrochemical overall water splitting (OWS). Herein, a new RuO 2 -Ru/MoO 2 @CC (RRM/CC) bifunctional electrocatalyst was prepared via a solid phase reaction strategy. To obtain a suitable precursor for SPR, MoS 2 nanosheets and RuO 2 nanoparticles (NPs) were sequentially loaded onto carbon cloth conductive substrate. Subsequently, the prepared RuO 2 /MoS 2 /CC precursor was sealed in a furnace and annealed in Ar to trigger the redox SPR. After SPR, active RuO 2 -Ru/MoO 2 units containing metal–metal oxide interfaces were formed on CC substrate uniformly. The optimized RRM/CC sample annealed at 400 °C exhibited a overpotential of 13 mV for hydrogen evolution reaction (HER) and 231 mV for oxygen evolution reaction (OER) at 10 mA·cm −2 under alkaline condition, respectively, which can be deduced to the modulated electronic structure and unique hierarchical structure. In addition, a low cell voltage of 1.48 V for OWS was required at 10 mA·cm −2 under alkaline condition. Meanwhile, RRM/CC exhibited excellent pH-independent durability. Graphical abstract