Pt–Pd Bifunctional Catalysts Supported on CeO2/Graphene Oxide for Reinforced Methanol Electro-oxidation

IF 2.7 4区化学 Q3 CHEMISTRY, PHYSICAL Electrocatalysis Pub Date : 2024-05-15 DOI:10.1007/s12678-024-00875-w

Qun Xiang, Yizhong Wang, Shuang Wang, Xucheng Fu, Guiqi Gao, Ruiwen Yan

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Abstract

In this work, the CeO₂ nanoparticles were dispersed onto the surface of graphene oxide (GO), followed by electrodeposition of Pt–Pd alloy nanoparticles on the CeO₂ surface to fabricate Pt–Pd@CeO₂/graphene oxide composites (Pt–Pd@CeO₂/GO). Morphological investigation was conducted using X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The results of morphological characterization revealed that CeO₂ nanoparticles acted as cores, while Pt–Pd alloy nanoparticles formed shells. The electrocatalytic oxidation performance of Pt–Pd@CeO₂/GO composites for methanol electro-oxidation reaction (MOR) was systematically investigated. The mass activity for MOR on Pt₁Pd_1.3@CeO₂/GO electrocatalyst was 1128 mA·mg_Pt+Pd⁻¹, which was 5.0-fold higher than that of Pt/C catalysts. The synergistic effect between Pt and Pd, along with the active oxygen-containing species of CeO₂ effectively enhanced catalytic activity. This work presents a novel approach to developing catalysts with high catalytic performance for MOR.

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以 CeO2/氧化石墨烯为载体的 Pt-Pd 双功能催化剂用于强化甲醇电氧化

本研究将 CeO2 纳米粒子分散到氧化石墨烯（GO）表面，然后在 CeO2 表面电沉积 Pt-Pd 合金纳米粒子，制备出 Pt-Pd@CeO2/ 氧化石墨烯复合材料（Pt-Pd@CeO2/GO）。利用 X 射线光电子能谱（XPS）和透射电子显微镜（TEM）进行了形态学研究。形态表征的结果表明，CeO2 纳米粒子是核心，而 Pt-Pd 合金纳米粒子形成了外壳。系统研究了 Pt-Pd@CeO2/GO 复合材料在甲醇电氧化反应（MOR）中的电催化氧化性能。Pt1Pd1.3@CeO2/GO电催化剂的甲醇电氧化反应质量活性为1128 mA-mgPt+Pd-1，是Pt/C催化剂的5.0倍。铂和钯之间的协同效应以及 CeO2 中的活性含氧物种有效地提高了催化活性。这项工作为开发具有高催化性能的 MOR 催化剂提供了一种新方法。

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来源期刊

Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY

CiteScore

4.80

自引率

6.50%

发文量

审稿时长

>12 weeks

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