Electro-catalytic Activity of Composite Films of Pd-doped Bacterial Cellulose Nano-fibers for Ethanol Oxidation

doi:10.11901/1005.3093.2016.793

Chinese Journal of Materials Research

2018, Vol. 32

Issue (2): 155-160 DOI: 10.11901/1005.3093.2016.793

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Electro-catalytic Activity of Composite Films of Pd-doped Bacterial Cellulose Nano-fibers for Ethanol Oxidation

Kelong AO, Dawei LI, Yixin YAO, Pengfei LV, Qufu WEI(

)

Key Laboratory of Eco-textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China

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Kelong AO, Dawei LI, Yixin YAO, Pengfei LV, Qufu WEI. Electro-catalytic Activity of Composite Films of Pd-doped Bacterial Cellulose Nano-fibers for Ethanol Oxidation. Chinese Journal of Materials Research, 2018, 32(2): 155-160.

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Abstract

Bacterial cellulose nanofibers (BCFs) were synthesized by fermentation process and then with the prepared BCFs as carrier material, composite films of Pd-doped bacterial cellulose nanofibers (Pd/BCF) were prepared by depositing nano-particles of Pd (Pd-NPs) on the carrier via chemical reduction process. The prepared Pd-doped BCFs and composite films Pd/BCF were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), cyclic voltammetry (CV), electrochemical impedance spectra (EIS), chronoamperometry (CA), and chronopotentiometry (CP). The results show that Pd-NPs were well dispersed on BCFs and especially in the mesoporous of BCFs. The composite films contain c.a. 19% (mass fraction) of Pd-NPs with a mean particle size c.a. 10 nm. The composite of Pd/BCF had better catalytic activity in contrast to the traditional carbon carrier material and Pt-catalyst. Besides, the composite of Pd/BCF exhibited relatively high poison tolerance during the ethanol oxidation process.

Key words: composite fuel cell ethanol electro-catalytic bacterial cellulose palladium

Received: 30 December 2016

ZTFLH:

TM9114

Fund: Supported by Natural Science Foundation of Jiangsu Province (No. BK20150155), Six Talent Peaks Project in Jiangsu Province (No. 2014-XCL001), Fundamental Research Funds for the Central Universities (Nos. JUSRP51505, JUSRP115A04＆JUSRP51621A), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)

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	Kelong AO
	Dawei LI
	Yixin YAO
	Pengfei LV
	Qufu WEI

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https://www.cjmr.org/EN/10.11901/1005.3093.2016.793 OR https://www.cjmr.org/EN/Y2018/V32/I2/155

Fig.1 SEM image of Pd/BCF (a), the inset shows the high resolution SEM; TEM image of Pd/BCF (b) and particle size distribution histogram of Pd on BCF (c)

Fig.2 XRD patterns of Pd/BCF

Fig.3 EIS of different electrodes

Fig.4 CV curves of different electrodes in 1 mol/L NaOH solution. The inset shows the magnification image of BC-Nafion/GCE electrode (scan rate: 20 mV/s)

Fig.5 CV curves for ethanol electrocatalytic oxidation on different electrodes (solution: 0.25 mol/L C₂H₅OH+0.25 mol/L NaOH; scan rate: 20 mV/s)

Table 1 Electrochemical performances of ethanol oxidization on different catalyst electrodes

Fig.6 CA curves for ethanol oxidation on different electrodes (E_{vs Ag/AgCl}=-0.2 V)

Fig.7 CP curves for ethanol oxidation on different electrodes (current density: 8 mA/cm²)

Fig.8 Schema of electrocatalytic oxidation of ethanol on Pd/BCF catalyst

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