Effects of TiO<sub>2</sub> in Pd-TiO<sub>2</sub>/C for glycerol oxidation in a direct alkaline fuel cell

Viviane Santos Pereira; Júlio Nandenha; Andrezza Ramos; Almir Oliveira Neto

doi:10.1016/S1872-5813(21)60171-8

Volume 50 Issue 4

Apr. 2022

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Article Navigation > Journal of Fuel Chemistry and Technology > 2022 > 50(4): 474-483

Viviane Santos Pereira, Júlio Nandenha, Andrezza Ramos, Almir Oliveira Neto. Effects of TiO2 in Pd-TiO2/C for glycerol oxidation in a direct alkaline fuel cell[J]. Journal of Fuel Chemistry and Technology, 2022, 50(4): 474-483. doi: 10.1016/S1872-5813(21)60171-8

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Viviane Santos Pereira, Júlio Nandenha, Andrezza Ramos, Almir Oliveira Neto. Effects of TiO₂ in Pd-TiO₂/C for glycerol oxidation in a direct alkaline fuel cell[J]. Journal of Fuel Chemistry and Technology, 2022, 50(4): 474-483. doi: 10.1016/S1872-5813(21)60171-8

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Effects of TiO₂ in Pd-TiO₂/C for glycerol oxidation in a direct alkaline fuel cell

doi: 10.1016/S1872-5813(21)60171-8

1.
Instituto de Pesquisas Energéticas e Nucleares-IPEN-CNEN/SP Centro de Células a Combustível e Hidrogênio-CECCO , Cidade Universitária, São Paulo-SP 05508-000, Brasil

Funds: The project was supported by the CAPES, FAPESP (2017/11937-4) and CNPq (302709/2020-7).

More Information

Corresponding author: viviane_sp_saopaulo@yahoo.com.br
Received Date: 2021-09-16
Accepted Date: 2021-10-28
Rev Recd Date: 2021-10-26

Available Online: 2021-11-20

Publish Date: 2022-04-26

Abstract

Abstract

The Pd-TiO₂ electrocatalysts were synthesized via sodium borohydride reduction and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), cyclic voltammetry, chronoamperometry and attenuated total reﬂectance-Fourier transform infrared (ATR-FTIR). The X-ray diffraction experiments of the Pd-TiO₂ showed peaks associated with Pd face-centered cubic (fcc) structure and peaks characteristics of TiO₂ (anatase phase) with a tetragonal structure. The TEM images showed that the Pd and TiO₂ nanoparticles were well distributed in the carbon support showing some clustered regions with nanoparticle sizes between 7 and 8 nm. Cyclic voltammograms showed an increase in current density values after the glycerol adsorption process. Experiments in alkaline direct glycerol fuel cells at 60 °C showed a higher power density for Pd-TiO₂/C (70∶30) in comparison to the commercial Pd/C electrocatalyst indicating that the use of the TiO₂ co-catalyst with Pd nanoparticles had a beneficial behavior. This effect can be attributed to the electronic effect or to the bifunctional mechanism. Molecules with high-value added glyceraldehyde, hydroxypyruvate and formate were identified as electrochemical reaction products of glycerol on all prepared electrocatalysts.
- glycerol oxidation,
- Pd-TiO₂ electrocatalysts,
- in-situ ATR-FTIR,
- cyclic voltammetry,
- alkaline fuel cell

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References(33)

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