Synthesis of palladium-rare earth alloy as a high-performance bifunctional catalyst for direct ethanol fuel cells  

作　　者：Qingqing Li Chang Sun Xiaolei Sun Zijun Yin Yaping Du Jin-Cheng Liu Feng Luo 

机构地区：[1]Tianjin Key Laboratory of Rare Earth Materials and Applications, School of Materials Science and Engineering, Center for Rare Earth and Inorganic Functional Materials, Nankai University, Tianjin, 300350, China [2]The Experimental High School Attached to Beijing Normal University, Beijing, 100032, China

出　　处：《Nano Research》2024年第11期9525-9531,共7页纳米研究（英文版）

基　　金：supported by National Key Research and Development Program of China(No.2021YFA1601004).

摘　　要：Direct ethanol fuel cells (DEFCs) have drawn attention for their simplicity, rapid start-up, high power density and environmental friendliness. Despite these advantages, the widespread application of DEFCs faces challenges, primarily due to the inadequate performance of anode and cathode catalysts. Pd-based materials have shown exceptional catalytic activity for both the ethanol oxidation reaction (EOR) and the oxygen reduction reaction (ORR). Alloying noble metals with rare earth elements has emerged as an effective strategy to further enhance the catalytic activity by modulating the electronic structure. In this study, we synthesized a series of palladium-rare earth (Pd3RE) alloys supported on carbon to serve as bifunctional catalysts that efficiently promote both ORR and EOR. Compared to Pd/C, the Pd3Tb/C catalyst exhibits 3.1-fold and 1.8-fold enhancement in activity for ORR and EOR, respectively. The charge transfer in the Pd3Tb/C results in an electron-rich Pd component, thereby weakening the binding energy with oxygen species and facilitating the two reactions.

关 键 词：rare earth alloy oxygen reduction reaction ethanol oxidation reaction direct ethanol fuel cells bifunctional electrocatalyst charge transfer 

分 类 号：O64[理学—物理化学]