High-efficient electrooxidation of ethylene glycol and ethanol on PdSn alloy loaded by versatile poly(3,4-ethylenedioxythiophene)

Xiuqing Yu; Ruirui Yue; Shiyao Yang; Changqing Fu; Jinbing Shu; Liang Shen

doi:10.1016/j.jcis.2024.05.100

High-efficient electrooxidation of ethylene glycol and ethanol on PdSn alloy loaded by versatile poly(3,4-ethylenedioxythiophene)

J Colloid Interface Sci. 2024 Sep 15:670:473-485. doi: 10.1016/j.jcis.2024.05.100. Epub 2024 May 18.

Authors

Xiuqing Yu¹, Ruirui Yue², Shiyao Yang¹, Changqing Fu³, Jinbing Shu⁴, Liang Shen⁵

Affiliations

¹ College of Chemistry and Chemical Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, PR China.
² College of Life Science, Jiangxi Science and Technology Normal University, Nanchang 330013, PR China.
³ Institute of Organic Functional Molecules, Jiangxi Science and Technology Normal University, Nanchang 330013, PR China.
⁴ College of Chemistry and Chemical Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, PR China. Electronic address: jinbingshu@jxstnu.com.cn.
⁵ College of Chemistry and Chemical Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, PR China. Electronic address: liangshen@jxstnu.com.cn.

PMID: 38772263
DOI: 10.1016/j.jcis.2024.05.100

Abstract

Developing a novel catalyst with lower noble-metal loading and higher catalytic efficiency is significant for promoting the widespread application of direct alcohol fuel cells (DAFCs). In this work, poly(3,4-ethylenedioxythiophene) (PEDOT) supported the PdSn alloy (PdSn/PEDOT) were simply synthesized and their electrocatalytic performance toward the oxidation of ethylene glycol and ethanol (EGOR and EOR) were investigated in alkaline media, respectively. In comparison with other control catalysts, the optimized Pd₄Sn₆/PEDOT catalyst exhibits the highest mass activity (7125/4166 mA mg_Pd^-1) and specific activity (26/15 mA cm^-2) towards EGOR/EOR. The mass activity of Pd₄Sn₆/PEDOT for EGOR and EOR are 11.9 and 10.9 times higher than commercial Pd/C, respectively. Moreover, chronoamperometry (CA) and successive cyclic voltammetry (CV) tests show that the CO resistance ability and durability of the Pd₄Sn₆/PEDOT catalyst were superior to Pd₄Sn₆, Pd/PEDOT and commercial Pd/C catalysts, which can be attributed to the d-band center of Pd can be effectively downshifted and the interface strain effect between electrons caused by the conjugated structure between PEDOT groups. This work provides an effective strategy for the development of highly efficient anode catalysts of DAFCs.

Keywords: Electrocatalytic oxidation; Ethanol; Ethylene glycol; Fuel cell; PEDOT; PdSn alloy.