PdRh bimetallene for energy-saving hydrogen production via methanol electroreforming

Optimization of the component and structure is a powerful strategy to enhance electrocatalytic perfor-mance of metallene. Herein, a facile and effective thermal-solvent approach is proposed for the synthesis of defect-rich and wrinkled PdRh bimetallene. The PdRh bimetallene exhibits superior electroactivity and durability in alkaline hydrogen evolution reaction (HER) and methanol oxidation reaction (MOR). Ben-efiting from defect-rich and curved metallene structure, the PdRh bimetallene possesses ultrahigh spe-cific surface area, exposed active sites, high conductivity and atomic utilization. Moreover, the bimetal-lic component effectively adjusts the electronic structure, optimizing the adsorption and dissociation of substances during electrocatalysis. The HER-MOR two-electrolysis system for PdRh bimetallene exhibits high energy conversion efficiency, requiring an only 0.657 V to reach a current density of 10 mA cm-2 for energy-efficient hydrogen (H- 2 ) production, which significantly decreases energy consumption com-pared with conventional water electrolysis. The proposed approach provides a promising strategy to de-sign bimetallic metallene for energy electrocatalytic applications.(c) 2022 Elsevier Ltd.