Efficient Electrosynthesis of Hydrogen Peroxide Enabled by a Hierarchical Hollow RE–P–O (RE = Sm, La, Gd) Architecture with Open Channels

• DOI: 10.1002/adma.202311997
• Publication Date: 2025-01-03T07:47:43Z
• Authors: Zhiwei Liu; Zhaowu Wang; Diandian Lv; Hongyuan Yang; Zhenhui Kang; Suptish Ghosh; Prashanth W. Menezes; Ziliang Chen
• Keywords: Electrosynthesis

Abstract The electrochemical two‐electron oxygen reduction reaction (2e − ORR) offers a sustainable pathway for the production of H 2 O ; however, development electrocatalysts with exceptional activity, selectivity, and long‐term stability remains challenging task. Herein, novel approach is presented to addressing this challenge by synthesizing hierarchical hollow SmPO 4 nanospheres open channels via two‐step hydrothermal treatment. produced compound demonstrates remarkable 2e exceeding 93% across wide potential range 0.0–0.6 V in 0.1 m KOH, peak 96% at 0.45 V. When employed as cathode flow cell, synthesized exhibits impressive 100 mA cm −2 12 h, consistently achieving Faradaic efficiency above 90%. Using X‐ray absorption, situ Raman Fourier‐transform infrared spectroscopies, theoretical calculations, post‐ORR assessments, it found that possesses intrinsic characterized optimal metal atomic spacing, structural compositional stabilities. These factors significantly enhance thermodynamics, kinetics, ORR process. Notably, also outstanding performance neutral environments. Furthermore, strategy can be extended other rare‐earth–P–O compounds, demonstrating excellent under both alkaline conditions.