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Fe促进的Pt@CeO2催化剂用于CO2加氢制C1产品OA北大核心CSTPCD

Fe-promoted Pt@CeO2 Catalysts for CO2 Hydrogenation to C1 Products

中文摘要英文摘要

在Pt@CeO2核壳纳米球表面引入过渡金属助剂,探究了不同过渡金属的引入对其CO2加氢性能的影响.研究结果表明,Fe物种的引入对加氢性能的提升效果最佳,液体C1产率达到6.34×10-2 mmol·g-1cat.·h-1.透射电子显微镜(TEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)、N2吸附-脱附实验、CO2程序升温脱附(CO2-TPD)和H2程序升温还原(H2-TPR)等表征结果表明,Fe物种在Pt@CeO2表面均匀分散,且Fe的存在降低了Pt物种的电荷密度,产生了更多的Pt2+物种,提高了产物中甲醇的选择性.此外,Fe的存在还促进了更多氧空位(Ov)的形成,进而促进了对CO2的吸附及后续的加氢反应,提高了催化活性.

Transition metal promoters were introduced on the surface of the Pt@CeO2 core@shell nanospheres,and the effects of different transition metals on the CO2 hydrogenation performance were investigated.The results show that the introduction of Fe species has the best effect on the enhancement of the hydrogenation performance,with a liquid C1 yield of 6.34×10-2 mmol·g-1cat.·h-1.Transmission electron microscopy(TEM),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),N2 adsorption-desorption experiments,CO2 temperature-programmed desorption(CO2-TPD),and H2 temperature-programmed reduction(H2-TPR)experiments reveal that Fe promoter was dispersed on the surface of Pt@CeO2,and Fe promoter decreases the charge density of Pt,generating more Pt2+ species and improving the selectivity of methanol.In addition,it also facilitates the formation of more oxygen vacancies(Ov),which in turn facilitate the adsorption of CO2 as well as the subsequent hydrogenation reaction,and improve the catalytic activity.

王子健;李雨鸥;张玲玲;汪啸;宋术岩;张洪杰

中国科学院长春应用化学研究所稀土资源利用国家重点实验室,长春 130022||中国科学技术大学应用化学与工程学院,合肥 230026中国科学院长春应用化学研究所稀土资源利用国家重点实验室,长春 130022||中国科学技术大学应用化学与工程学院,合肥 230026||清华大学化学系,北京 100084

化学

CO2加氢C1产品核壳纳米球Fe助剂

CO2 hydrogenationC1 productCore@shell nanospheresFe promoter

《高等学校化学学报》 2024 (004)

无机纳米催化材料

27-32 / 6

国家科技重大项目(批准号:2021YFB3500700)、国家自然科学基金(批准号:22020102003,22025506和22271274)和吉林省科技发展计划项目(批准号:20230101035JC和20230101022JC)资助. Supported by the National Science and Technology Major Project of China(No.2021YFB3500700),the National Natural Science Foundation of China(Nos.22020102003,22025506,22271274)and the Program of Science and Technology Development Plan of Jilin Province,China(Nos.20230101035JC,20230101022JC).

10.7503/cjcu20230480

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