高等学校化学学报 ›› 2026, Vol. 47 ›› Issue (2): 20250168.doi: 10.7503/cjcu20250168

• 物理化学 • 上一篇    下一篇

双金属氧化物协同效应增强电催化丙烯氧化性能

葛佳, 王仁颖, 孙贤迪, 刘航, 郑亚荣()   

  1. 合肥工业大学化学与化工学院, 合肥 230009
  • 收稿日期:2025-06-18 出版日期:2026-02-10 发布日期:2025-09-30
  • 通讯作者: 郑亚荣 E-mail:yrzh@hfut.edu.cn
  • 基金资助:
    国家自然科学基金(21703228);国家自然科学基金(22275047);安徽省留学归国人员创新创业支持计划项目(2022LCX033)

Electrocatalytic Propylene Oxidation Performance Enhanced by Synergistic Effect of Bimetallic Oxides

GE Jia, WANG Renying, SUN Xiandi, LIU Hang, ZHENG Yarong()   

  1. School of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei 230009,China
  • Received:2025-06-18 Online:2026-02-10 Published:2025-09-30
  • Contact: ZHENG Yarong E-mail:yrzh@hfut.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21703228);the Anhui Province Returned Overseas Students Innovation and Entrepreneurship Support Program, China(2022LCX033)

摘要:

电催化丙烯氧化合成1,2-丙二醇(PG)为绿色化学工艺提供了潜在途径, 但钯(Pd)催化剂易受CO中毒且活性较低, 制约了其进一步发展. 为了克服上述挑战, 本文采用合金化策略, 设计并合成了一种双金属氧化物PdPbO x 催化剂. 通过化学共还原法结合高温热处理, 精准调控催化剂中Pd与Pb的比例, 制备了一系列不同钯铅含量的PdPbO x 催化剂, 并将其用于电催化丙烯氧化反应. 结果表明, Pd0.256Pb0.045O x 催化剂表现出最优异的电催化丙烯氧化活性, 在2.6 V(vs. RHE)电位下, PG的产率高达90.78 mmol·m-2·h-1. 相较于单组分PdO催化剂, PdPbO x 催化性能的显著提升归因于双金属体系所展现出的多元素协同效应, 该效应能够有效调控催化剂的活性位点分布并优化其电子结构, 为设计高效电催化丙烯氧化催化剂提供了新的思路和方向.

关键词: 双金属氧化物, 合金化, 协同效应, 电催化, 丙烯氧化

Abstract:

The electrocatalytic oxidation of propylene to 1,2-propylene glycol(PG) holds promise as a sustainable green chemistry approach. However, conventional palladium(Pd)-based catalysts are susceptible to CO poisoning and exhibit limited activity, which impedes their widespread application. To address the aforementioned challenges, an alloying strategy was employed in this study to design and synthesize a bimetallic oxide PdPbO x catalyst. A series of PdPbO x catalysts with varied Pd/Pb ratios were prepared through a chemical co-reduction method followed by high-temperature annealing. These catalysts were then evaluated for the electrocatalytic propylene oxidation reaction. Electrochemical measurements results reveal that the Pd0.256Pb0.045O x catalyst demonstrates superior electrocatalytic activity, achieving a PG production rate of 90.78 mmol·m-2·h-1 at 2.6 V(vs. RHE). The significant performance enhancement compared to the PdO catalyst is attributed to the multi-element synergistic effect exhibited by the bimetallic system. This effect effectively modulates the active site distribution and optimizes the electronic structure of the catalyst, providing new insights and directions for the design of highly efficient electrocatalytic propylene oxidation catalysts.

Key words: Bimetallic oxide, Alloying, Synergism, Electrocatalysis, Propylene oxidation

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