文献类型：期刊文献

英文题名：Enhanced high temperature proton exchange membrane fuel cell performance via PtCo/C catalysts synthesized by ball-milling

作者：Zheng, Hongxiang[1];Deng, Junwen[1];Yuan, Shuaishuai[1];Huang, Feng[1];Zhang, Ruhang[1];Tian, Pengfei[1];Zhang, Ziyu[2];Yu, Xinhai[1];Tu, Shan-tung[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, MOE, Shanghai 200237, Peoples R China;[2]Suzhou Naqing New Energy Technol Co Ltd, Suzhou 215000, Peoples R China

年份：2026

卷号：407

外文期刊名：FUEL

收录：;EI(收录号：20254619489174);WOS:【SCI-EXPANDED(收录号:WOS:001619164300001)】；

基金：This study was financially supported by the China Natural Science Foundation (Contract No. 22393954) .

语种：英文

外文关键词：High temperature proton exchange membrane; fuel cells; Ball milling; Catalyst; High phosphate tolerance; Platinum-cobalt alloy

摘要：In this study, carbon-supported platinum-cobalt alloy (PtCo/C) nanoparticles with relatively small particle sizes (similar to 3 nm) were prepared to improve the performance and durability of high-temperature proton exchange membrane fuel cells (HT-PEMFCs). The PtCo/C-700 catalyst demonstrated excellent HT-PEMFC activity, achieving a peak power density of 0.401 W cm(-2) under H-2-air conditions. At a voltage of 0.6 V, the mass activity reached 0.223 A mg(Pt)(-1), which was 1.5 times and 2.2 times that of commercial PtCo/C and commercial Pt/C, respectively. Additionally, the catalyst exhibited only a slight performance loss after 168 h of operation at 0.2 A cm(-2) under H-2-air conditions. X-ray absorption spectroscopy (XAS) and electrocatalytic tests confirmed that ball milling can introduce more active sites, resulting in the best activity of PtCo/C-700. In situ attenuated total reflectance surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) revealed that *OOH could rapidly dissociate into *O intermediates at the PtCo alloy sites, thereby enhancing the HT-PEMFC activity. Density functional theory (DFT) calculations indicated that the incorporation of Co atoms altered the Pt structure and reduced the adsorption energy of phosphate anions on the catalyst surface. In addition, the overpotentials of PtCo/C-700 after the preadsorption of phosphate anions were lower than those of commercial Pt/C and commercial PtCo/C, which explained the enhanced performance of the HT-PEMFC. This study provided a general method for the large-scale production of nanosized PtCo catalysts for HT-PEMFCs.