In Situ metal exsolution induced structural transformation enhances activity of the Pd–Sn catalyst for electrocatalytic ethanol oxidation†

IF 5 3区材料科学 Q2 CHEMISTRY, PHYSICAL

Sustainable Energy & Fuels Pub Date : 2025-03-18 DOI:10.1039/D5SE00261C

Ashly P. Chandran, Sundar Pavan, Soumi Mondal, Mahesh B. V and Anand B

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引用次数: 0

Abstract

Pd–Sn intermetallic nanoparticles with the composition Pd_1.5Sn_0.5 were synthesized using a one pot solvothermal process. The structure, composition, and morphology of Pd_1.5Sn_0.5 were characterized by Powder X-ray Diffraction (pXRD), X-ray Photoelectron Spectroscopy (XPS), High-Resolution Transmission Electron Spectroscopy (HRTEM) and X-ray Absorption Spectroscopy (XAS). The electrochemical activity towards the ethanol oxidation reaction (EOR) and durability of the catalyst were tested in an alkaline medium using cyclic voltammetry measurements. The catalyst demonstrated a gradual increase in activity over successive reaction cycles and exhibited better durability compared to the commercial 20 wt% Pd/C catalyst. Post EOR analysis revealed a structural transformation of the catalyst, attributed to the exsolution of Sn atoms from the lattice during the electrochemical process. This process regenerated the Pd-rich catalyst in each cycle, significantly improving its activity and durability, enabling stable performance over 1000 continuous reaction cycles.

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原位金属外溶诱导的结构转变提高了Pd-Sn电催化乙醇氧化催化剂的活性

采用一锅溶剂热法合成了Pd-Sn金属间纳米粒子，其组成为Pd1.5Sn0.5。采用粉末x射线衍射（pXRD）、x射线光电子能谱（XPS）、高分辨率透射电子能谱（HRTEM）和x射线吸收光谱（XAS）对Pd1.5Sn0.5的结构、组成和形貌进行了表征。用循环伏安法测试了催化剂在碱性介质中对乙醇氧化反应（EOR）的电化学活性和耐久性。在连续的反应周期中，该催化剂的活性逐渐增加，并且与20% Pd/C的商用催化剂相比，具有更好的耐久性。后EOR分析揭示了催化剂的结构转变，归因于电化学过程中Sn原子从晶格中析出。该工艺在每个循环中再生富pd催化剂，显著提高其活性和耐久性，使其在1000个连续反应循环中保持稳定的性能。

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来源期刊

Sustainable Energy & Fuels Energy-Energy Engineering and Power Technology

CiteScore

10.00

自引率

3.60%

发文量

394

期刊介绍： Sustainable Energy & Fuels will publish research that contributes to the development of sustainable energy technologies with a particular emphasis on new and next-generation technologies.