基于晶格匹配Pt-Co-ZnO三元界面催化剂设计及其催化CO2加氢性能

石油炼制与化工 ›› 2024, Vol. 55 ›› Issue (2): 144-152.

基于晶格匹配Pt-Co-ZnO三元界面催化剂设计及其催化CO₂加氢性能

万雅琴,张煜华,李金林,王立

中南民族大学化学与材料科学学院，催化转化与能源材料化学教育部重点实验室，催化材料科学湖北省重点实验室

收稿日期:2023-10-16 修回日期:2023-10-28 出版日期:2024-02-12 发布日期:2024-01-29
通讯作者: 王立 E-mail:li.wang@scuec.edu.cn
基金资助:
国家自然科学基金面上项目;国家自然科学基金面上项目

DESIGNING Pt-Co-ZnO TERNARY INTERFACES FOR ENHANCED CO₂ HYDROGENATION PERFORMANCE THROUGH LATTICE MATCHING

Received:2023-10-16 Revised:2023-10-28 Online:2024-02-12 Published:2024-01-29

摘要/Abstract

摘要： 针对精准构建多组分固体催化剂纳米多元界面的难题，鉴于六方晶型氧化亚钴（hcp-CoO）与氧化锌（ZnO）具有超高的晶格匹配度（大于99.8%），采用晶格匹配策略定向构建Pt-Co-ZnO三元界面，设计合成了三元催化剂Pt-ZnO@CoO，并利用扫描电镜（SEM）、扫描透射电镜（STEM）、能量色散X射线光谱（EDX）、X射线衍射（XRD）、电感耦合等离子质谱仪（ICP-MS）、氢气程序升温还原（H₂-TPR）、二氧化碳程序升温脱附（CO₂-TPD）等方法对其形貌、元素分布、物相结构、元素含量、还原能力和吸附能力进行了表征，进而在固定床反应器上评价了其CO₂加氢反应的催化性能。结果表明：在制备的Pt-ZnO@CoO催化剂上，Co、Pt均高度分散于ZnO表面；催化剂经过还原处理，CoO和Pt前体被还原为纳米颗粒，从而形成Pt-Co-ZnO三元界面；Pt-ZnO@CoO催化剂对CO₂加氢反应显示出优异的催化活性和稳定性，这是因为其具有高密度的界面位点、较强的还原能力和较强的CO₂吸附能力。

关键词: 三元界面, Pt-Co催化剂, CO₂加氢, 晶格匹配

Abstract: Aiming at the difficuly of accurately constructing nanomultiple interface ofmulti-component solid catalysts, given the extremely high lattice match between hexagonal cobalt(II) oxide (hcp-CoO) and zinc oxide (ZnO)(>99.8%),the Pt-ZnO@CoO ternary catalyst was was designed and synthesized using lattice mathing strategy for targeted construction of ternary interface. The morphology, elemental distribution, phase structure, elemental content, reduction capability, and adsorption capacity of the catalystwere characterized by scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), inductively coupled plasma mass spectrometry (ICP-MS), hydrogen programmed temperature reduction (H₂-TPR) and carbon dioxide programmed temperature desorption (CO₂-TPD), then its catalytic performance for CO₂ hydrogenationwas evaluated in a fixed-bed reactor. The results showed that Co and Pt were highly dispersed on the surface ofPt-ZnO@CoO catalyst, and the precursors of CoO and Pt were reduced to nano-particles after reduction treatment. The Pt-ZnO@CoO catalyst exhibits excellent catalytic performance and stability for CO₂ hydrogenation, this is because of its high density of the interface sites, strong reduction ability and strong CO₂ adsorption capacity.

Key words: ternary interface, Pt-Co catalyst, CO₂ hydrogenation, lattice matching

万雅琴张煜华李金林王立. 基于晶格匹配Pt-Co-ZnO三元界面催化剂设计及其催化CO₂加氢性能[J]. 石油炼制与化工, 2024, 55(2): 144-152.

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基于晶格匹配Pt-Co-ZnO三元界面催化剂设计及其催化CO₂加氢性能

DESIGNING Pt-Co-ZnO TERNARY INTERFACES FOR ENHANCED CO₂ HYDROGENATION PERFORMANCE THROUGH LATTICE MATCHING

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