Porous Nitrogen‐Doped Nb 2 C Nanosheets for Electrocatalytic ORR to Selectively Produce H 2 O 2

作者：Meixuan Li, Xinyao Zhang, Bing Ni, Wenbo Yue · 发表于：Chemistry - A European Journal · 年份：2025 · DOI：10.1002/chem.202500758 · 被引用次数：3 · 研究领域：MXene and MAX Phase Materials、Electrocatalysts for Energy Conversion、Advanced Photocatalysis Techniques

Abstract The two‐electron pathway in the oxygen reduction reaction (ORR) represents an efficient and environmentally friendly approach for hydrogen peroxide (H 2 O 2 ) production. Among various types of potential catalysts, MXene have garnered significant attention due to their outstanding electrical conductivity, abundant edge active sites, and low costs. In this study, we successfully synthesize porous N‐doped Nb 2 C nanosheets (N‐Nb 2 C) via a room‐temperature ammonia etching method and investigate their ORR performance toward the formation of H 2 O 2 . The doping of nitrogen effectively modulates the electronic structure of Nb 2 C nanosheets, while the abundant surface pores formed during ammonia etching facilitate the ORR process. Hence, the electrocatalytic performance of N‐Nb 2 C nanosheets is significantly improved, demonstrating excellent long‐term stability and durability. Notably, in rotating ring‐disk electrode (RRDE) tests, the N‐Nb 2 C catalyst achieves a remarkable H 2 O 2 yield of 86.8%, highlighting its potential for selective H 2 O 2 production through electrocatalytic ORR. Our findings suggest that N‐doped Nb 2 C holds great promise for applications in two‐electron oxygen reduction for H 2 O 2 synthesis.