Abstract A novel catalyst material consisting of Pt0 and Ce1-xPtxO1-δ particles supported on multi-walled carbon nanotubes modified with cerium (MWC1-xCexNTs) has been prepared by liquid phase deposition and vapor-phase dissociative methods. Despite low total Pt loading of 6 wt%, Ce1-xPtxO2-δ + Pt0/MWC1-xCexNTs catalyst exhibits outstanding activity for methanol oxidation reaction (MOR) and remarkable CO removing ability in acidic media. Differential electrochemical mass spectrometry study demonstrated that CO2 and HCO2CH3 are the oxidation products on Ce1-xPtxO2-δ + Pt0/MWC1-xCexNTs. The Ce1-xPtxO2-δ solid solution particles facilitate the adsorption of hydroxyl species due to the considerable presence of oxygen vacancies. Adsorbed hydroxyl species interact with Pt0-CO blocked sites releasing Pt0 to proceed with MOR. The presence of cerium in MWC1-xCexNTs support presumably facilitates the transport of electrons providing favorable conditions to enhance MOR.

中文翻译：

---

Ce1-xPtxO2-δ 和 Pt0 颗粒上的甲醇氧化反应负载在 Ce 修饰的多壁碳纳米管上

摘要 采用液相沉积法和气相解离法制备了一种由负载在铈改性多壁碳纳米管上的 Pt0 和 Ce1-xPtxO1-δ 颗粒组成的新型催化剂材料（MWC1-xCexNTs）。尽管总 Pt 负载量为 6 wt%，但 Ce1-xPtxO2-δ + Pt0/MWC1-xCexNTs 催化剂表现出出色的甲醇氧化反应（MOR）活性和在酸性介质中显着的 CO 去除能力。微分电化学质谱研究表明，CO2 和 HCO2CH3 是 Ce1-xPtxO2-δ + Pt0/MWC1-xCexNTs 的氧化产物。由于存在大量氧空位，Ce1-xPtxO2-δ 固溶体颗粒促进了羟基物质的吸附。吸附的羟基与 Pt0-CO 封闭位点相互作用，释放 Pt0 以进行 MOR。