Free–templated synthesis of N–doped PtCu porous hollow nanospheres for efficient ethanol oxidation and oxygen reduction reactions

Luo, Xiashuang; Fu, Cehuang; Shen, Shuiyun; Luo, Liuxuan; Zhang, Junliang

doi:10.1016/j.apcatb.2023.122602

Cited by 15 publications

(10 citation statements)

References 43 publications

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“…The convective flow of particles transforms the precursor (PtCuCo alloy) into a hierarchical porous hollow structure. What's more, based on Kirkendall effect, the relatively faster diffusion rate of transition metals leads to the formation of hollow structures [90]. Compared with hard and soft template method, template-free method reduces the side effects brought by removing template, and provides a feasible way for realizing large-scale industrial production of HPC materials [80,86].…”

Section: Template-free Methodsmentioning

confidence: 99%

Hierarchical porous carbon materials for lithium storage: preparation, modification, and applications

Ying,

Yin,

Zhao

et al. 2024

Nanotechnology

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Secondary battery as an efficient energy conversion device have been highly attractive for alleviating the energy crisis and environmental pollution. Hierarchical porous carbon materials with multiple sizes pore channels are considered as promising materials for energy conversion and storage applications, due to their high specific surface area and excellent electrical conductivity. Although many reviews have reported on carbon materials for different fields, systematic summaries about hierarchical porous carbon materials for lithium storage are still rare. In this review, we fist summarize the main preparation methods of hierarchical porous carbon materials, including hard template method, soft template method, and template-free method. The modification methods including porosity and morphology tuning, heteroatom doping, and multiphase composites are introduced systematically. Then, the recent advances in hierarchical porous carbon materials on lithium storage are summarized. Finally, we outline the challenges and future perspectives for the application of hierarchical porous carbon materials in lithium storage.

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Section: Template-free Methodsmentioning

confidence: 99%

Hierarchical porous carbon materials for lithium storage: preparation, modification, and applications

Ying,

Yin,

Zhao

et al. 2024

Nanotechnology

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“…002 of graphite, indicating that with the increase of phosphoric acid concentration, the width of the peak gradually increases and the carbonization degree of hydrothermal carbon increases [26]. The appearance of this peak also indicates that hydrothermal carbon before and after modification is amorphous carbon, which is suitable for use as adsorbent materials [27].…”

Section: Xrd Analysismentioning

confidence: 95%

Adsorption properties and mechanism of Pb<sup>2+</sup> in hydrothermal carbon solution of modified banana peel

Bai,

Yao,

Zhao

et al. 2023

Preprint

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Using banana peel as raw material, the adsorption properties of hydrothermal carbon pre-10 pared from banana peel modified with different concentrations of phosphoric acid solution for lead 11 ions in aqueous solution were studied. The surface structure and functional groups of the modified 12 hydrothermal carbon were analyzed by XRD and SEM. The results show that the surface of the 13 modified banana peel hydrothermal carbon prepared at 240℃ and 2mol/L phosphoric acid solution 14 has large pores. The adsorption capacity is larger when pH value is 6.When the concentration of 15 phosphoric acid solution was 2mol/L, the solid-liquid ratio was 2g/L, the adsorption capacity was 16 40.64mg/g, and the removal rate was 82.74%.When the initial concentration of lead solution in-17 creased to 100mg/L, the adsorption capacity of modified hydrothermal carbon for lead ion increased 18 to 76.81mg/g, and the removal rate decreased to 76.81%.The equilibrium adsorption time of banana 19 peel phosphoric acid modified hydrothermal carbon for lead ions in solution is 300min. The adsorp-20 tion process satisfies the pseudo-second-order kinetic model and Langmuir isotherm equation. The 21 reaction temperature is 313K, and the equilibrium adsorption capacity can reach 101.19mg/g. The 22 adsorption of Pb ions in aqueous solution by phosphoric acid modified hydrothermal carbon is 23 dominated by single layer chemisorption. The artificial neural network has a fitting correlation of 24 0.99, and the adsorption process includes physical adsorption, electrostatic attraction, ion exchange, 25 and surface complexation.

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“…5 However, the large-scale actual application of DEFCs is still hindered by their anode catalysts with low activity and high cost. 6,7 Palladium (Pd)-based materials, as one of the candidate catalysts for the ethanol oxidation reaction (EOR), possess high catalytic activity and relatively abundant reserves. 8−10 Nevertheless, Pd-based nanocatalysts are easily poisoned and exhibit poor stability due to the surface-adsorbed reaction intermediates.…”

Section: Introductionmentioning

confidence: 99%

“…The issues of the environment and energy have become increasingly tense in recent years, and many countries are focusing on the development and popularization of efficient and clean energy. , Direct ethanol fuel cells (DEFCs) have received extensive attention due to their low environmental impact and high energy density. , Moreover, ethanol has low toxicity and can be widely produced through crop fermentation . However, the large-scale actual application of DEFCs is still hindered by their anode catalysts with low activity and high cost. , Palladium (Pd)-based materials, as one of the candidate catalysts for the ethanol oxidation reaction (EOR), possess high catalytic activity and relatively abundant reserves. − Nevertheless, Pd-based nanocatalysts are easily poisoned and exhibit poor stability due to the surface-adsorbed reaction intermediates. , Accordingly, the reasonable construction of Pd-based catalysts aimed at excellent stability and high activity is urgently desired for the application of DEFCs.…”

Section: Introductionmentioning

confidence: 99%

Bismuth Incorporation in Palladium Hydride for the Electrocatalytic Ethanol Oxidation with Enhanced CO Tolerance

Yang,

Li,

et al. 2023

ACS Appl. Mater. Interfaces

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Introducing nonmetal and oxophilic metal into palladium (Pd)-based catalysts is beneficial for boosting electrocatalysis, especially regarding the improvement of mass activity (MA) and CO tolerance. Herein, the stable bismuth-doped palladium hydride (Bi/PdH) networks have been successfully fabricated through a simple one-step method. The intercalation of interstitial H atoms expands the lattice of Pd, and the doping of oxophilic metal Bi restrains the adsorption of poisonous intermediates on the surface of Pd, thereby improving the activity and durability of the as-prepared catalysts in the ethanol oxidation reaction (EOR). The obtained Bi/ PdH networks manifest a remarkable MA of 8.51 A•mg Pd −1 , which is 11.18 times higher than that of commercial Pd/C (0.76 A•mg Pd −1). The CO-stripping analysis results indicate that Bi doping can significantly prohibit CO adsorption on the surface of the Bi/PdH networks. The density functional theory (DFT) calculations also reveal that Bi doping enhances the OH* adsorption on the catalyst surface and mitigates the interaction between Pd and CO* intermediates, providing deeper insights into the origin of the enhanced EOR activity and CO tolerance. This work describes an impactful path for producing high-performance and durable PdH-based nanocatalysts.

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Free–templated synthesis of N–doped PtCu porous hollow nanospheres for efficient ethanol oxidation and oxygen reduction reactions

Cited by 15 publications

References 43 publications

Hierarchical porous carbon materials for lithium storage: preparation, modification, and applications

Hierarchical porous carbon materials for lithium storage: preparation, modification, and applications

Adsorption properties and mechanism of Pb<sup>2+</sup> in hydrothermal carbon solution of modified banana peel

Bismuth Incorporation in Palladium Hydride for the Electrocatalytic Ethanol Oxidation with Enhanced CO Tolerance

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