文献类型：期刊文献

英文题名：Defect-Anchored Iridium Single Atoms on Palladium Metallenes for Synergistically Enhanced Ethanol Oxidation Reaction

作者：Li, Wenbo[1];Gao, Mengyue[1];Jiang, Zhen[1];Han, Cheng[1];Jia, Yanyan[1];Wang, Kuan-Wen[2];Dai, Sheng[1]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat & Feringa Nobel Prize Scientist Jo, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Natl Cent Univ, Inst Mat Sci & Engn, Taoyuan 320, Taiwan

年份：2026

卷号：4

期号：2

外文期刊名：CHEMISTRYEUROPE

收录：WOS:【ESCI(收录号:WOS:001816308700001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (22376062), the Science and Technology Commission of Shanghai Municipality (22ZR1415700), the Fundamental Research Funds for the Central Universities, and the National Council of Science and Technology, Taiwan (NSTC 114-2221-E-008-081 and 114-2218-E-008-003-). Additional support was provided by the Frontiers Science Center for Materiobiology and Dynamic Chemistry and the Feringa Nobel Prize Scientist Joint Research Center at East China University of Science and Technology.

语种：英文

外文关键词：defect engineering; ethanol oxidation reaction; iridium palladium metallenes; single-atom catalysts

摘要：The development of highly efficient electrocatalysts for the ethanol oxidation reaction (EOR) is critical to the commercialization of direct ethanol fuel cells, which represent a promising clean energy technology. 2D palladium metallenes (Pd MLs) have recently emerged as attractive electrocatalytic materials with the potential to replace conventional Pt-based catalysts, owing to their exceptionally high surface-to-volume ratio. However, the practical application of Pd MLs requires the construction of efficient active sites and the mitigation of stability issues associated with their defective structures. In this study, a defect-site activation strategy is proposed involving the anchoring of single iridium (Ir) atoms onto the high-strain defect regions of ultrathin Pd MLs, which significantly enhances their EOR performance. The optimized catalyst, Ir0.59/Pd ML, featuring atomically dispersed Ir, achieves a remarkable mass activity of 1085.45 mA mg-1 toward EOR-approximate to 12.8 times higher than that of pristine Pd MLs. Detailed mechanistic studies indicate that the enhancement arises from the formation of synergistic Pd-Ir sites within the defect regions. These sites concurrently improve both EOR activity and poison tolerance through electronic modulation. This work demonstrates the potential of atomic-level engineering of intrinsic defects in metallene materials for the rational design of advanced 2D electrocatalysts.