Methanol Electro-Oxidation in Alkaline on a Titanium Electrode Supporting Ni-P or Ni Deposits

Chen, S.G.; Xu, Yingxian; Wei, Zimeng; Li, L.; Qi, Xiaochen; Li, Guo; Ding, Wei; Xia, Meirong

doi:10.2174/1877610811202010042

Cited by 2 publications

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“…Nevertheless, the surface species transformation of metallic catalysts often occurs during electrooxidation, leading to much controversy regarding the activity origin 20 . Some researches suggested that the oxyhydroxides in situ generated from the non-(hydro)oxide pre-catalysts are identified as a catalytically active phase 26 , 27 . Another statement is that the NOR proceeds via adsorbate oxidation mechanism pathway 28 .…”

Section: Introductionmentioning

confidence: 99%

Insights into the activity of nickel boride/nickel heterostructures for efficient methanol electrooxidation

et al. 2022

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Designing efficient catalysts and understanding the underlying mechanisms for anodic nucleophile electrooxidation are central to the advancement of electrochemically-driven technologies. Here, a heterostructure of nickel boride/nickel catalyst is developed to enable methanol electrooxidation into formate with a Faradaic efficiency of nearly 100%. Operando electrochemical impedance spectroscopy and in situ Raman spectroscopy are applied to understand the influence of methanol concentration in the methanol oxidation reaction. High concentrations of methanol inhibit the phase transition of the electrocatalyst to high-valent electro-oxidation products, and electrophilic oxygen species (O* or OH*) formed on the electrocatalyst are considered to be the catalytically active species. Additional mechanistic investigation with density functional theory calculations reveals that the potential-determining step, the formation of *CH2O, occurs most favorably on the nickel boride/nickel heterostructure rather than on nickel boride and nickel. These results are highly instructive for the study of other nucleophile-based approaches to electrooxidation reactions and organic electrosynthesis.

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Section: Introductionmentioning

confidence: 99%

Insights into the activity of nickel boride/nickel heterostructures for efficient methanol electrooxidation

et al. 2022

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“…to reduce energy consumption. To further expand the advantages of UOR, it is necessary to design an efficient catalyst. − In recent years, a large number of nonprecious metal-based catalysts were used for urea electrooxidation such as Ni-based, Co-based, and Fe-based materials. − However, the majority of the studies focused more on the activity of UOR, while only a few of them discussed UOR products and their selectivity. It is worth noting that urea can be overoxidized to nitrogen oxides such as NO 2 – and NO 3 – rather than pure N 2 on Ni-based catalysts .…”

Section: Introductionmentioning

confidence: 99%

Highly Selective Electrooxidation of Urea to Nitrogen on Copper/Nickel Boride Interface under Alkaline Condition

Shen

et al. 2023

Ind. Eng. Chem. Res.

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Urea electrooxidation reaction (UOR) plays an important role in environmental protection and energy regeneration. The extensively studied nickel-based catalysts exhibit good activity for UOR, but urea is more prone to be overelectrooxidized to another pollutant NO x – (x = 2, 3). Herein, the Cu/Ni-B interface catalyst is presented. The introduction of Cu significantly enhances the Faradaic efficiency of N2 (nearly 70% at 1.70 V versus RHE). Electrochemical tests and in situ Raman spectroscopy results show that the introduction of Cu significantly affects the density of OH* species on the catalyst in the UOR process. It is proposed that with a moderate decrease in OH* density, the catalyst can provide enough sites for urea molecules to allow simultaneous adsorption of the two N atoms, facilitating the process of N-N coupling to form N2. This work is also instructive for the design of electrocatalysts for other nucleophile electrooxidation reactions.

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Methanol Electro-Oxidation in Alkaline on a Titanium Electrode Supporting Ni-P or Ni Deposits

Cited by 2 publications

References 0 publications

Insights into the activity of nickel boride/nickel heterostructures for efficient methanol electrooxidation

Insights into the activity of nickel boride/nickel heterostructures for efficient methanol electrooxidation

Highly Selective Electrooxidation of Urea to Nitrogen on Copper/Nickel Boride Interface under Alkaline Condition

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