催化作用
材料科学
纳米棒
煅烧
X射线光电子能谱
贵金属
化学工程
纳米颗粒
拉曼光谱
纳米孔
吸附
金属
纳米技术
化学
冶金
物理化学
物理
光学
工程类
生物化学
作者
Haiyang Wang,Jianjing Gao,Ruiyin Zhang,Hao Ma,Cheng Ma,Ruijuan Yao,Miaomiao Liang,Yuzhen Zhao,Zongcheng Miao
出处
期刊:ChemNanoMat
[Wiley]
日期:2022-12-16
卷期号:9 (2)
被引量:2
标识
DOI:10.1002/cnma.202200475
摘要
Abstract The nanorod shaped (Pt−Au)/CeO 2 catalysts with varied Pt/Au ratio were achieved from Al 91.7 Ce 8 Au X Pt 0.15−X (X=0.05, 0.075, 0.1) precursor alloys through combined dealloying and calcination treatment. The surface morphology, microstructure as well as physicochemical features were characterized through XRD, SEM, TEM, XPS, Raman spectroscopy and N 2 adsorption‐desorption tests. The catalytic measurement results imply that the (Pt 0.075 −Au 0.075 )/CeO 2 catalyst displays optimal catalytic property with 50% and 99% reaction temperature as low as 37 °C, 80 °C, respectively. The (Pt 0.075 −Au 0.075 )/CeO 2 was also stable after 60 h successive catalytic oxidation reaction. The outstanding catalytic performance is ascribed to the joint introduction of Pt and Au, which can suppress the agglomeration and growth of noble metal active phases during the catalytic process. What's more, the nanoscale interface formed between Pt&Au nanoparticles and CeO 2 nanorods can also promote electron transfer rate, thus catalytic reaction efficiency is enhanced. The results will be of importance for design of novel nanoporous noble metal‐oxide‐based catalysts and application in exhaust treatment of fuel vehicles.
科研通智能强力驱动
Strongly Powered by AbleSci AI