电催化剂
金属间化合物
兴奋剂
催化作用
纳米颗粒
材料科学
石墨烯
氧还原反应
氧还原
纳米技术
化学工程
拉伤
电化学
化学
复合材料
物理化学
光电子学
电极
有机化学
医学
内科学
工程类
合金
作者
L. D. Zhang,Xianghong Li,Yiqing Chen,Hsiao‐Tsu Wang,Yuhui Chen,Kuan Hung Chen,Yu‐Cheng Shao,Wenbin Lin,Chih‐Wen Pao,Weibo Hua,Way‐Faung Pong,Jun Luo,Lili Han
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2023-12-20
被引量:1
标识
DOI:10.1021/acssuschemeng.3c06146
摘要
Targeting high-performance yet cost-effective Pt-based catalysts with low Pt usage and high Pt utilization remains a big challenge in the oxygen reduction reaction (ORR) electrocatalysis. In this work, we demonstrate delicate engineering of strain control via N-doping in ordered PtZn intermetallic nanoparticles supported on N-doped carbon (PtZnN/NC). Benefiting from the ameliorated compressive strain and consequently greatly optimized electronic structures, PtZnN/NC displays ultrahigh ORR activity and durability in both acidic and alkaline media, with respective high mass activities of 297.5 and 80.7 A gPt–1 at 0.9 VRHE, exceeding those of benchmark Pt/C by 8.3- and 2.8-folds. Theoretical calculations reveal that the N-doping effectively lowers the d-band center of PtZnN, resulting in loose binding of *OH on the PtZnN surface, which facilitates the potential-determining step with a reduced energy barrier. This work successfully offers strategic guidance for strain equilibration in alloys via N-doping toward the rational design of advanced electrocatalysts.
科研通智能强力驱动
Strongly Powered by AbleSci AI