Constructing 3D crosslinked CeO2 nanosheet/graphene architectures anchored with Pd nanoparticles for boosted formic acid and methanol oxidation performance

IF 6.4 1区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR
Cuizhen Yang, Tingyao Wang, Tianyi Wang, Hao Yuan, Hongxing Li, Haiyan He, Dongming Liu, Huajie Huang
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Abstract

In recent years, there is growing interest in direct formic acid fuel cells and direct methanol fuel cells due to the diminishing energy resources and escalating environmental concerns, which stimulates the rapid development of advanced anode catalysts towards the formic acid and methanol oxidation reactions. This study outlines an efficient bottom-up approach for the controllable fabrication of three-dimensional (3D) crosslinked CeO2 nanosheet/graphene architectures anchored with Pd nanoparticles (Pd/CeO2-G) via a solvothermal co-building process. The existence of 3D graphene skeletons introduces numerous pore channels for the fast transportation of reactants and electrons, while the incorporation of CeO2 nanosheets provides abundant oxygen vacancies to stabilize Pd species as well as reduce the CO adsorption on active surfaces. As a result, the as-synthesized Pd/CeO2-G architectures exhibit impressive electrocatalytic formic acid and methanol oxidation properties including large electrochemically active surface areas, high mass activities, and exceptional long-term stability, which make them more competitive than traditional Pd catalysts supported by carbon black, carbon nanotube, and graphene matrices.
构建三维交联CeO2纳米片/石墨烯结构,锚定Pd纳米颗粒,提高甲酸和甲醇氧化性能
近年来,由于能源资源的减少和环境问题的加剧,人们对直接甲酸燃料电池和直接甲醇燃料电池的兴趣日益浓厚,这刺激了用于甲酸和甲醇氧化反应的先进阳极催化剂的快速发展。本研究概述了一种有效的自下而上的方法,通过溶剂热共构建工艺,可控地制造三维(3D)交联CeO2纳米片/石墨烯结构,并锚定Pd纳米颗粒(Pd/CeO2- g)。三维石墨烯骨架的存在为反应物和电子的快速传输提供了大量的孔隙通道,而CeO2纳米片的加入提供了丰富的氧空位,以稳定Pd物质并减少CO在活性表面的吸附。因此,合成的Pd/CeO2-G结构具有令人印象深刻的电催化甲酸和甲醇氧化性能,包括大的电化学活性表面积、高质量活性和卓越的长期稳定性,这使它们比由炭黑、碳纳米管和石墨烯基质支撑的传统Pd催化剂更具竞争力。
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来源期刊
Inorganic Chemistry Frontiers
Inorganic Chemistry Frontiers CHEMISTRY, INORGANIC & NUCLEAR-
CiteScore
10.40
自引率
7.10%
发文量
587
审稿时长
1.2 months
期刊介绍: The international, high quality journal for interdisciplinary research between inorganic chemistry and related subjects
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