Experimental and computational investigation of Cu–N coordination bond strengthened polyaniline for stable energy storage

Xie, Yibing; Chen, Yu‐Cheng

doi:10.1007/s10853-021-05920-3

Cited by 30 publications

(11 citation statements)

References 60 publications

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“…The N 1s XPS spectra were recorded to investigate the chemical states of N-containing groups (Figure d). The G 3 -OCH 3 /Cu sample retained a C–N bond (∼399.5 eV), while the N 1s XPS spectrum of G 3 -NH 2 /Cu was deconvoluted into two sub-peaks centered at 399.5 and 398.5 eV, ascribed to C–N and Cu–N interactions, respectively, , suggesting the electron transfer from N to Cu in G 3 -NH 2 /Cu.…”

Section: Resultsmentioning

confidence: 99%

“…The N 1s XPS spectra were recorded to investigate the chemical states of N-containing groups (Figure2d). The G 3 -OCH 3 /Cu sample retained a C−N bond (∼399.5 eV), while the N 1s XPS spectrum of G 3 -NH 2 /Cu was deconvoluted into two sub-peaks centered at 399.5 and 398.5 eV, ascribed to C−N and Cu−N interactions, respectively,27,28 suggesting the electron transfer from N to Cu in G 3 -NH 2 /Cu.Electrochemical CO 2 RR Measurements. The electrocatalytic CO 2 RR performances of G 3 -NH 2 /Cu, G 3 -OCH 3 /Cu, and pristine Cu were evaluated in flow cells (Methods in the Supporting Information).…”

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confidence: 99%

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Promoting CO₂ Electroreduction to Acetate by an Amine-Terminal, Dendrimer-Functionalized Cu Catalyst

Yang,

Lv,

Peng

et al. 2023

ACS Cent. Sci.

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Acetate derived from electrocatalytic CO 2 reduction represents a potential low-carbon synthesis approach. However, the CO 2 -to-acetate activity and selectivity are largely inhibited by the low surface coverage of in situ generated *CO, as well as the inefficient ethenone intermediate formation due to the side reaction between CO 2 and alkaline electrolytes. Tuning catalyst microenvironments by chemical modification of the catalyst surface is a potential strategy to enhance CO 2 capture and increase local *CO concentrations, while it also increases the selectivity of side reduction products, such as methane or ethylene. To solve this challenge, herein, we developed a hydrophilic amine-tailed, dendrimer network with enhanced *CO intermediate coverage on Cu catalytic sites while at the same time retaining the in situ generated OH − as a high local pH environment that favors the ethenone intermediate toward acetate. The optimized amine-network coordinated Cu catalyst (G 3 -NH 2 /Cu) exhibits one of the highest CO 2 -to-acetate Faradaic efficiencies of 47.0% with a partial current density of 202 mA cm −2 at −0.97 V versus the reversible hydrogen electrode.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Promoting CO₂ Electroreduction to Acetate by an Amine-Terminal, Dendrimer-Functionalized Cu Catalyst

Yang,

Lv,

Peng

et al. 2023

ACS Cent. Sci.

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“…The EIS measurements of TiO 2 NTA electrodes are conducted for the kinetic analysis of ion diffusion and electron transfer 38–40 . The open‐circuit potential is determined at a current density of 0 according to the linear sweep voltammetry curve of TiO 2 NTA at 5 mV s −1 .…”

Section: Resultsmentioning

confidence: 99%

Photoelectrochemical performance of tubewall‐separated titanium dioxide nanotube array photoelectrode

Xie

2021

Asia-Pacific J Chem Eng

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Titanium dioxide nanotube array (TiO2 NTA) grown on titanium substrate has been fabricated as active photoelectrode for organic compound degradation. TiO2 NTA shows the tubewall‐separated nanotube arrangement and anatase crystal structure. Transient photocurrent of 1.86 mA and open‐circuit photovoltage of 0.26 V are determined to keep stable level under ultraviolet (UV) light irradiation, indicating its high photoelectrochemical activity. The cathodic polarization process causes more feasible electron transfer than the equilibrium process and anodic polarization process, which is consistent with the declining current response at an increasing positive potential. The photocatalytic activity of TiO2 NTA is fully evaluated through UV light‐induced photocatalysis and photoelectrocatalysis degradation of organic dye X‐3B as a reactant pollutant. The pseudo‐first‐order reaction rate constant is enhanced from 0.00346 min−1 for photocatalysis to 0.00521 min−1 for photoelectrocatalysis using Langmuir–Hinshelwood kinetic model of heterogeneous catalysis. The tubewall‐separated nanotube structure could induce photoelectron directional transport and provide extra interspace for reactant organic molecule diffusion at accessible surface area. The positive potential applied on TiO2 NTA could further promote photoelectron–hole pair separation. Two strategies of photoelectron generation and photoelectron–hole separation are accordingly adopted to improve its electro‐assisted photocatalytic activity. Therefore, the tubewall‐separated TiO2 NTA could present the promising photoelectrocatalysis application.

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“…2 exhibits two major peaks at 932.7 and 952.5 eV, which are related to the binding energies of Cu 2p 3/2 and Cu 2p 1/2 , respectively, and suggests copper to be in the oxidation state +2 or +1. 26,33,37,38 Two smaller peaks at 928.9 and 948.9 eV can be attributed to Cu 2p 3/2 and Cu 2p 1/2 of even further reduced metallic copper (Fig. 2).…”

Section: Papermentioning

confidence: 99%

“…S6 †), three distinct peaks with binding energies at 396.5, 399.2, and 400.3 eV can be assigned to the nitrogen atoms of the CvN-C group in the triazine/pyridine rings and the coordinated pyridine N donor on the copper ion, respectively. 33,34 From the O 1s spectrum (Fig. S7 †), curve fitting revealed three peaks assigned to OH (531.8 eV), Ti-O (529.9 eV), and O vac (527.0 eV).…”

Section: Papermentioning

confidence: 99%

Sustainable catalysts for efficient triazole synthesis: an immobilized triazine-based copper-NNN pincer complex on TiO₂

Esfandiari¹,

Mohammadnezhad²,

Akintola³

et al. 2023

Dalton Trans.

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Experimental and computational investigation of Cu–N coordination bond strengthened polyaniline for stable energy storage

Cited by 30 publications

References 60 publications

Promoting CO₂ Electroreduction to Acetate by an Amine-Terminal, Dendrimer-Functionalized Cu Catalyst

Promoting CO₂ Electroreduction to Acetate by an Amine-Terminal, Dendrimer-Functionalized Cu Catalyst

Photoelectrochemical performance of tubewall‐separated titanium dioxide nanotube array photoelectrode

Sustainable catalysts for efficient triazole synthesis: an immobilized triazine-based copper-NNN pincer complex on TiO₂

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Experimental and computational investigation of Cu–N coordination bond strengthened polyaniline for stable energy storage

Cited by 30 publications

References 60 publications

Promoting CO2 Electroreduction to Acetate by an Amine-Terminal, Dendrimer-Functionalized Cu Catalyst

Promoting CO2 Electroreduction to Acetate by an Amine-Terminal, Dendrimer-Functionalized Cu Catalyst

Photoelectrochemical performance of tubewall‐separated titanium dioxide nanotube array photoelectrode

Sustainable catalysts for efficient triazole synthesis: an immobilized triazine-based copper-NNN pincer complex on TiO2

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Promoting CO₂ Electroreduction to Acetate by an Amine-Terminal, Dendrimer-Functionalized Cu Catalyst

Promoting CO₂ Electroreduction to Acetate by an Amine-Terminal, Dendrimer-Functionalized Cu Catalyst

Sustainable catalysts for efficient triazole synthesis: an immobilized triazine-based copper-NNN pincer complex on TiO₂