One-stone, two birds: Alloying effect and surface defects induced by Pt on Cu2−xSe nanowires to boost C-C bond cleavage for electrocatalytic ethanol oxidation

Peng, Hongcheng; Ren, Jun; Wang, Yuchao; Xiong, Yu; Wang, Qichen; Li, Qian; Zhao, Xin; Zhan, Longsheng; Zheng, Lirong; Tang, Yougen; Lei, Yongpeng

doi:10.1016/j.nanoen.2021.106307

Cited by 114 publications

(61 citation statements)

References 58 publications

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“…[81] The peak at 1240 cm −1 is associated with the utilization of CH 3 CHOH* and OPt. [83] Furthermore, the band at 1045 cm −1 corresponds to ethanol depletion. [84] Notably, no CO adsorption was observed on the GaPtMnP/N-MWCNT surface with increasing potential.…”

Section: Electrochemical Performance Analysismentioning

confidence: 99%

Novel GaPtMnP Alloy Based Anodic Electrocatalyst with Excellent Catalytic Features for Direct Ethanol Fuel Cells

Yoon

Basumatary

Kılıç³

et al. 2022

Adv Funct Materials

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Although considerable effort has been devoted to developing bifunctional electrocatalysts with enhanced atomic utilization in ethanol fuel cells, significant progress in this field has been hindered by notable drawbacks of the electrocatalysts, such as low stability, poor activity, and inefficient repeatability for multiple startup and shutdown cycles. Considering these issues herein, a novel nanosized GaPtMnP alloy anchored on N-doped multiwall carbon nanotubes (MWCNTs) is developed. The average size of the spherical GaPtMnP alloy nanoparticles is ≈3.5 nm. The atomic structure and d-band shift of Pt in the GaPtMnP alloy are demonstrated using state-of-the-art density functional theory calculations. Cyclic voltammetry analysis revealed that GaPtMnP/N-MWCNT delivered high mass and specific activities of 9.16 A mg Pt −1 and 10.4 mA cm −2 , respectively, in 0.3 m H 2 SO 4 + 0.5 m ethanol, values that are ≈13and 8-fold higher than the corresponding values for Pt/C. In addition, it exhibits long-term stability and durability even after 3000 cycles. A single cell based on the GaPtMnP/N-MWCNT anodic electrocatalyst exhibits a peak power density of 86.64 mW cm −2 , which is approximately fourfold higher than that of Pt/C at 70 °C. Furthermore, the performance of a fuel cell comprising the GaPtMnP/N-MWCNT catalyst remained constant even after multiple startup-shutdown cycles.

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Section: Electrochemical Performance Analysismentioning

confidence: 99%

Novel GaPtMnP Alloy Based Anodic Electrocatalyst with Excellent Catalytic Features for Direct Ethanol Fuel Cells

Yoon

Basumatary

Kılıç³

et al. 2022

Adv Funct Materials

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“…Such an unprecedented rate performance is not only because of the unique structure of the integrated electrode which could facilitate the fast charge transfer during electrochemical process, but also due to the enhancement of conductivity derived from the structure vacancy and sodium-ion insertion. [46,47] Encouraged by this fast sodium ion storage performance, the longterm cycling capability of the integrated Cu 2 Se electrode was estimated at a high rate of 2 A g −1 as shown in Figure 5g. During the cycling process, the specific capacity of the integrated Cu 2 Se electrode remained stable even with no significant fluctuation, demonstrating a ≈100% capacity retention after 4000 cycles.…”

Section: Sodium Ions Storage Behaviorsmentioning

confidence: 99%

In Situ Fabrication of Cuprous Selenide Electrode via Selenization of Copper Current Collector for High‐Efficiency Potassium‐Ion and Sodium‐Ion Storage

Chen

Wang

et al. 2021

Advanced Science

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Selenium-based materials are considered as desirable candidates for potassium-ion and sodium-ion storage. Herein, an in situ fabrication method is developed to prepare an integrated cuprous selenide electrode by means of directly chemical selenization of the copper current collector with commercial selenium powder. Interestingly, only the electrolyte of 1 m potassium hexafluorophosphate dissolved in 1,2-dimethoxyethane with higher highest occupied molecular orbital energy and lower desolvation energy facilitates the formation of polyselenide intermediates and the further selenization of the copper current collector. Benefiting from the unique thin-film-like nanosheet morphology and the robust structural stability of the integrated electrode, the volume change and the loss of selenide species could be effectively restrained. Therefore, high performance is achieved in both potassium-ion batteries (462 mA h g −1 at 2 A g −1 for 300 cycles) and sodium-ion batteries (775 mA h g −1 at 2 A g −1 for 4000 cycles). The facile fabrication strategy paves a new direction for the design and preparation of high-performance electrodes.

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“…[33] Besides, metal oxides have received extensive attention with respect to the NRR on account of their reactive activity and high stability. [34] The construction of lattice defects (oxygen vacancies) is an important strategy for regulating material performance, [35][36][37][38] such as electrical properties, adsorption properties, and catalytic properties. As for the NRR, introducing oxygen vacancies into catalytic materials is also a significant method to boost its catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Cerium Zirconium Solid Solution with High Faradaic Efficiency for Electrochemical Nitrogen Reduction Reaction under Ambient Condition

et al. 2021

ChemElectroChem

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Industrial synthesis of ammonia (NH 3 ) involves high energy consumption resulting in intense pollution. Alternatively, electrochemical nitrogen reduction reaction (NRR) to NH 3 can be carried out under mild conditions, which is a new green NH 3 synthesis method. Herein, cerium zirconium solid solutions (Zr x Ce 1-x O 2 ) with different proportions were synthesized by NH 3 precipitation method and employed as electrocatalysts for NRR. The performance of the different catalysts in 0.1 mol L À 1 Na 2 SO 4 was evaluated with H 2 O and N 2 as reactants. The results show that Zr 0.9 Ce 0.1 O 2 has the highest Faraday efficiency (FE) of 62.68 % at À 1.3 V (vs. Ag/AgCl) and the highest yield rate of NH 3 À 9.34 × 10 À 11 mol cm À 2 s À 1 at À 1.35 V (vs. Ag/AgCl). The impressive FE is due to more oxygen vacancies in Zr 0.9 Ce 0.1 O 2 introduced by Ce 3 + , which is more prone to the adsorption of N 2 on the catalyst surface and facilitates the electrochemical reaction.

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One-stone, two birds: Alloying effect and surface defects induced by Pt on Cu2−xSe nanowires to boost C-C bond cleavage for electrocatalytic ethanol oxidation

Cited by 114 publications

References 58 publications

Novel GaPtMnP Alloy Based Anodic Electrocatalyst with Excellent Catalytic Features for Direct Ethanol Fuel Cells

Novel GaPtMnP Alloy Based Anodic Electrocatalyst with Excellent Catalytic Features for Direct Ethanol Fuel Cells

In Situ Fabrication of Cuprous Selenide Electrode via Selenization of Copper Current Collector for High‐Efficiency Potassium‐Ion and Sodium‐Ion Storage

Cerium Zirconium Solid Solution with High Faradaic Efficiency for Electrochemical Nitrogen Reduction Reaction under Ambient Condition

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