Flexible-Design in Controllable Synthesis of Ru Catalyst toward Enzymatic and Electrochemical Hydrogen Peroxides Performance

• Published in: New journal of chemistry 2024
• Main Authors: Hu, Xi, Yang, Yujun, Pu, Yaoyang, Mao, Xiang
• Format: Article
• Language: English
• ISSN: 1144-0546; 1369-9261
• DOI: 10.1039/D4NJ01331J

Ruthenium (Ru) based functional structure has been well understood in catalytic performance due to its special particularity in structural fabrications. In this work, it firstly reported the controllable synthesis of core-shell Ru nanomaterials were not only to realize via ice bath conditions with amorphous characterization, but also conveyed the flexible-design in controllable synthesis Ru crystalline after high intensity focused ultrasound (HIFU) treatment. The achieved amorphous Ru particles (~115±3 nm) and Ru crystalline (~5±0.5 nm) exhibit hydrogen peroxides catalytic performance, and can be considered as electrochemical sensing platform. The Km value of core-shell Ru for 3, 3', 5, 5'-tetramethylbenzidine (TMB) was 0.221 mM, which exhibit a higher affinity for TMB and the prominent catalytic performance than horseradish peroxidase (HRP). Among the selectivity and sensitivity towards the detection of H2O2 molecule, it expressed a wide linear range from 0.5 to 100 mM with a H2O2 detection limit of 1.45 μM (S/N = 3), and a sensitivity of 2.07 μA μM-1. After HIFU treatment, the diameter of achieved Ru crystalline was about one-twentieth of core-shell Ru structure. The enhancement in catalytic performance was observed as a sensor platform for detecting H2O2, its detection range was wider from 0.5 to 110 mM, limits of detection was 0.007 μM (S/N = 3), exhibit higher sensitivity of 443 μA μM-1. Hence, this flexible design in synthesis of Ru NMs (amorphous and crystalline status) could provide novel synthetic strategy and obtain the achievements in catalytic performances