Highly dispersed PtCo nanoparticles on micro/nano-structured pyrolytic carbon from refined sugar for methanol electro-oxidation in acid media

Macias-Ferrer, D.; Melo-Banda, J.A.; Silva–Rodrigo, R.; Lam-Maldonado, Mayda; Verde-Gómez, José Ysmael; Del-Angel-Vicente, P.

doi:10.1016/j.cattod.2018.04.064

Cited by 11 publications

(1 citation statement)

References 75 publications

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“…Good performances have been reported when using PtRu, PtRh, PtPd and PtSn catalysts [20,[22][23][24][25][26]. Conversely, Fe, Ni and Co supported on micro/nano-structured carbon did not present catalytic activity for the EOR [27]. The C-C bond breaking was favored with PtRh.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Evaluation of PtNi Electrocatalysts for CO and Methanol Oxidation in Low Temperature Fuel Cells

et al. 2020

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Pt(Ni)/C and PtRu(Ni)/C catalysts were synthesized by electroless deposition of Ni on a carbon dispersion followed by sequenced Pt deposition and spontaneous deposition of Ru species. The structural analyses of the catalysts with 88:12 and 98:2 Pt:Ni atomic ratios pointed out to the formation of small hexagonal Ni crystallites covered by thin cubic Pt surface structures with no evidence about PtNi alloy formation. The onset potentials for CO oxidation on Pt(Ni)/C and PtRu(Ni)/C were about 0.10 and 0.24 V more negative than those of Pt/C, thus indicating their better CO tolerance. The surface Ru species appeared to have the major effect by facilitating the CO removal by the bifunctional mechanism. The onset potential for the methanol oxidation reaction (MOR) of Pt(Ni)/C was about 0.15 V lower than that of Pt/C. The mass and specific activities together with the exchange current densities of the Pt(Ni)/C catalysts were also higher than those of Pt/C, making in evidence their higher activity in front of the MOR. The Tafel slopes for the MOR on Pt(Ni)/C suggested different reaction mechanism than on Pt/C. The electronic (ligand) effect of Ni on Pt was considered the main reason to explain the higher activity of Pt(Ni)/C in front of the CO oxidation and the MOR.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Evaluation of PtNi Electrocatalysts for CO and Methanol Oxidation in Low Temperature Fuel Cells

et al. 2020

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Low‐dose Ir‐doped TiO ₂ supported Pt‐Co bimetallic nanoparticles: A highly active and CO‐tolerant electrocatalyst towards methanol oxidation reaction

Phan

Pham

et al. 2022

Intl J of Energy Research

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Summary Highly stable and cost‐effective electrocatalysts are of importance in regulating energy conversion efficiency and commercial feasibility of direct methanol fuel cells (DMFCs). So far, integrating transition metals into Pt‐based catalysts to enhance their catalytic performances for methanol electro‐oxidation reaction (MOR) at the anode of DMFCs has received significant interest. This study witnessed the first time of depositing Pt3Co1 alloy nanoparticles (NPs) on robust Ti0.9Ir0.1O2 supports utilizing a modified reduction method that used NaBH4 as a reducing agent in the absence of surfactants or stabilizers. This novel combination not only reduces the usage of costly and easily‐deactivated Pt but also significantly improves catalytic activity and poisoning tolerance for MOR. Regarding electrocatalytic performance, the onset potential and the mass activity of the Pt3Co1/Ti0.9Ir0.1O2 catalyst are ~0.1 V vs NHE and 316.16 mA/mgPt, respectively, which are 4.5‐fold lower and 1.5‐fold higher than the corresponding figures for the commercial Pt/C (E‐TEK) catalyst, ~0.45 vs NHE and 206.83 mA/mgPt, indicating superior catalytic activity and CO‐tolerance of the former over the latter. Furthermore, the superior anti‐poisoning ability and stability of the Pt3Co1/Ti0.9Ir0.1O2 catalyst are demonstrated by its 2.2‐fold higher If/Ib ratio in MOR and lower degradation rate in the 60‐min chronoamperometry (CA) and 3000‐cycle scanning tests than the Pt/C counterpart. These enhancements could be abscribed to synergistic influence between the Pt‐Co alloy NPs and the robust Ti0.9Ir0.1O2 support. The addition of Co into the catalyst to promote removal of Pt‐poisoning species as well as the use of highly corrosion‐resistant Ir‐doped TiO2 as a catalyst support play a decisive role in boosting electrochemical behaviors of the Pt3Co1/ Ti0.9Ir0.1O2 catalyst. Generally, the success of this work in synthesizing high‐performance Pt3Co1/Ti0.9Ir0.1O2 catalyst could serve as groundwork for further development of TiO2‐based material supported bimetallic catalysts for applications in the electrochemical catalysis field.

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Ag/g-C3N4 nanosheets as a progressive support of Pt catalyst for improved electrocatalytic oxidation of methanol

Xu,

Luo,

Zeng

et al. 2024

J Mater Sci

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Highly dispersed PtCo nanoparticles on micro/nano-structured pyrolytic carbon from refined sugar for methanol electro-oxidation in acid media

Cited by 11 publications

References 75 publications

Synthesis and Evaluation of PtNi Electrocatalysts for CO and Methanol Oxidation in Low Temperature Fuel Cells

Synthesis and Evaluation of PtNi Electrocatalysts for CO and Methanol Oxidation in Low Temperature Fuel Cells

Low‐dose Ir‐doped TiO ₂ supported Pt‐Co bimetallic nanoparticles: A highly active and CO‐tolerant electrocatalyst towards methanol oxidation reaction

Ag/g-C3N4 nanosheets as a progressive support of Pt catalyst for improved electrocatalytic oxidation of methanol

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Highly dispersed PtCo nanoparticles on micro/nano-structured pyrolytic carbon from refined sugar for methanol electro-oxidation in acid media

Cited by 11 publications

References 75 publications

Synthesis and Evaluation of PtNi Electrocatalysts for CO and Methanol Oxidation in Low Temperature Fuel Cells

Synthesis and Evaluation of PtNi Electrocatalysts for CO and Methanol Oxidation in Low Temperature Fuel Cells

Low‐dose Ir‐doped TiO 2 supported Pt‐Co bimetallic nanoparticles: A highly active and CO‐tolerant electrocatalyst towards methanol oxidation reaction

Ag/g-C3N4 nanosheets as a progressive support of Pt catalyst for improved electrocatalytic oxidation of methanol

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Low‐dose Ir‐doped TiO ₂ supported Pt‐Co bimetallic nanoparticles: A highly active and CO‐tolerant electrocatalyst towards methanol oxidation reaction