Nature-inspired designs have increasingly influenced biomedical engineering by providing superior biomechanical performance and structural stability. In this study, the diabolical ironclad beetle elytra structure was applied to stent strut designs and thoroughly evaluated through various computational simulations to assess their potential to enhance the mechanical performance of WE43 magnesium alloy stents. Connected elliptical structures with a vertical-to-horizontal length ratio of 1:1.8 were incorporated in varying numbers and then compared to conventional laser-cut stents using 3-point bending, crush, crimping, and expansion tests, internal carotid artery insertion simulations, and computational fluid dynamics analyses. The results demonstrated that the biomimetic stents exhibited significantly improved stress distribution and reduced applied stress while maintaining hemodynamic stability. Computational fluid dynamics simulations further confirmed that the biomimetic could reduce wall shear stress and improve blood flow, thereby potentially minimizing the risk of restenosis and thrombosis. These findings suggest that diabolical ironclad beetle-inspired stent structures may offer enhanced biomechanical performance and clinical safety in magnesium-based endovascular interventions.

Herein, a simple synthetic approach is employed for the atomic dispersion of Rh atoms (Rh SAs) over the surface of interconnected Mo₂C nanosheets intimately embedded in a three-dimensional Ni_xMoO_y nanorod arrays (Ni_xMoO_y NRs) framework; we found that the introduction of both isolated Rh SAs and Ni_xMoO_y NRs adjusts the electrocatalytic function of the host Mo₂C toward the direction of being an advanced and highly stable electrocatalyst for efficient hydrogen evolution at pH-universal conditions. As a result, the proposed catalyst outperforms most recently reported transition metal-based catalysts, and its performance even rivals that of commercial Pt/C, as demonstrated by its ultralow overpotentials of 31.7, 109.7, and 95.4 mV at a current density of 10 mA cm⁻², along with its small Tafel slopes of 42.4, 51.2, and 46.8 mV dec⁻¹ in acidic, neutral, and alkaline conditions, respectively. In addition, the catalyst shows remarkable long-term stability over all pH values with good maintenance of its catalytic activity and structural characteristics after continuous operation.