Dicyanamide Anion-Based Ionic Liquid-Functionalized Graphene-Supported Pt Catalysts for Boosting Methanol Electrooxidation

Wang, Ruiying; Yang, Lili; Wang, Xingchao; Sun, Zhipeng; Guo, Yong; Lou, Mengran; Shi, Hongli; Wen, Pengtao; Hu, Xiaoqin

doi:10.1021/acs.inorgchem.1c02111

Cited by 5 publications

(4 citation statements)

References 57 publications

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“…The maximum current density was obtained at about À0.23 V in the positive CV sweep and at about À0.37 V in the negative CV sweep probably due to incomplete methanol oxidation and intermediate product (CO ad ) formation during methanol oxidation, respectively. 41 The mass activities of the samples Pt 0.13 / Ni-NC, Pt 0.4 /Ni-NC, Pt 0.2 /Ni-NC and Pt 0.1 /Ni-NC were 1.90, 0.85, 1.60, and 1.46 A mg À1 Pt , respectively. These results reveal that the samples supported on the NC material possessed much higher mass activity than that of 20% Pt/C (0.38 A mg À1 Pt ); particularly, the highest mass activity was achieved for the Pt 0.13 /Ni-NC sample.…”

Section: Resultsmentioning

confidence: 92%

Pt-decorated MOF-derived Ni–N–C materials as efficient electrocatalysts for methanol oxidation

Liao¹,

Chen²,

Zhang³

et al. 2023

New J. Chem.

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Section: Resultsmentioning

confidence: 92%

Pt-decorated MOF-derived Ni–N–C materials as efficient electrocatalysts for methanol oxidation

Liao¹,

Chen²,

Zhang³

et al. 2023

New J. Chem.

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“…The current densities of different samples are normalized by Pt loading (mass activity). The peak level reaches a maximum current density at about 0.7 V when CV performs a positive sweep and at about 0.45 V when it performs a negative sweep, which is related to incomplete methanol oxidation and the intermediate products (CO ad ) of methanol oxidation, respectively [51,52]. The mass activities of the samples of Pt/Co-PC800, Pt/Co-NCNT-HPC600, Pt/Co-NCNT-HPC700, Pt/Co-NCNT-HPC800 and Pt/Co-NCNT-HPC900 are 295.4, 162.9, 249.8, 416.2 and 334.8 mA mg −1 Pt , respectively.…”

Section: Resultsmentioning

confidence: 99%

ZIF-8@ZIF-67-Derived Co Embedded into Nitrogen-Doped Carbon Nanotube Hollow Porous Carbon Supported Pt as an Efficient Electrocatalyst for Methanol Oxidation

et al. 2021

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It is of prime importance to develop anode electrocatalysts for direct methanol fuel cells (DMFCs) with good performance, which is critical for their commercial applications. Metal-organic framework (MOF)-derived carbon materials are extensively developed as supports of catalysts. Herein, Co embedded nitrogen-doped carbon nanotube hollow porous carbon (Co-NCNT-HPC) derived from MOFs have been fabricated, which were synthesized by pyrolyzing at an optimized temperature of 800 °C using ZIF-8@ZIF-67 as a precursor. The presence of ZIF-8@ZIF-67 ensures the doping of nitrogen and the large specific surface area of the support materials at high temperatures. A Pt/Co-NCNT-HPC800 sample, which was synthesized using Co-NCNT-HPC800 as a support, showed an enhanced mass activity of 416.2 mA mg−1Pt for methanol oxidation reaction (MOR), and the onset potential of COad oxidation of 0.51 V, which shifted negatively about 0.13 V compared with Pt/C (20%). Moreover, the Pt/Co-NCNT-HPC800 sample exhibits high stability. This work provides a facile strategy for MOF-derived carbon materials to construct advanced electrocatalysts for MOR.

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“…RTIL are molten salts consisting of a bulky, poorly coordinating anion and an asymmetric organic cation . In recent years, RTIL have found their way into various fields ranging from batteries, , sensors, fuel cells, supercapacitors, and carbon capture , to bio applications . They exhibit superior CO 2 solubility, high intrinsic electric conductivities, and a wide electrochemical stability window .…”

Section: Introductionmentioning

confidence: 99%

Cu/Au(111) Surfaces and AuCu Intermetallics for Electrocatalytic Reduction of CO₂ in Ionic Liquid Electrolytes

Ratschmeier,

Paulsen,

Stallberg

et al. 2024

ACS Catal.

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Room-temperature ionic liquids (RTIL) are important alternatives to aqueous electrolytes in electrocatalytic reactions, batteries, and fuel cells. They are known to reduce existing high overpotentials and increase CO 2 solubility as well as product selectivity in CO 2 reduction reactions (CO 2 RR). In our work, we have studied the activity for CO 2 RR of Au(111), Cu(111), and Cu-modified Au(111) electrodes with 1/3, 2/3, and 3/3 Cu monolayers, as well as of AuCu and AuCu 3 intermetallics in contact with 1-butyl-3-methylimidazolium bis-(trifluoromethylsulfonyl)imide [BMIM][NTf 2 ] electrolytes with 1.5 M H 2 O. Using offline gas chromatography (GC), we demonstrate the formation of H 2 and mainly CO as the only reduction products at Au(111), while exclusively H 2 is formed at Cu(111). Synergistic electronic and geometric effects lead to higher levels of CO formation at Cu-modified Au(111) electrodes in comparison to neat Au(111). Operando IR absorption spectroscopy (IRAS) of the bulk electrolyte shows the formation of a 2-imidazolium carboxylic acid intermediate that can lower the overpotential for CO 2 reduction and does not require stabilization of a CO 2 − radical anion as an alternative intermediate at the interface. Systematic variation of the copper content at the catalysts' surfaces enables us to adjust the H 2 /CO syngas ratio to a maximum of 1.8 for Cu-modified Au(111) electrodes and ∼3.2 for AuCu 3 catalysts at electrolysis times of 20 min, demonstrating a large tunability of the syngas ratio with electrode potential. The observed range of H 2 /CO ratios includes the ideal ratio of 2 for the Fischer−Tropsch process to produce hydrocarbons and the ratio of 3 needed for methanation.

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Dicyanamide Anion-Based Ionic Liquid-Functionalized Graphene-Supported Pt Catalysts for Boosting Methanol Electrooxidation

Cited by 5 publications

References 57 publications

Pt-decorated MOF-derived Ni–N–C materials as efficient electrocatalysts for methanol oxidation

Pt-decorated MOF-derived Ni–N–C materials as efficient electrocatalysts for methanol oxidation

ZIF-8@ZIF-67-Derived Co Embedded into Nitrogen-Doped Carbon Nanotube Hollow Porous Carbon Supported Pt as an Efficient Electrocatalyst for Methanol Oxidation

Cu/Au(111) Surfaces and AuCu Intermetallics for Electrocatalytic Reduction of CO₂ in Ionic Liquid Electrolytes

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Dicyanamide Anion-Based Ionic Liquid-Functionalized Graphene-Supported Pt Catalysts for Boosting Methanol Electrooxidation

Cited by 5 publications

References 57 publications

Pt-decorated MOF-derived Ni–N–C materials as efficient electrocatalysts for methanol oxidation

Pt-decorated MOF-derived Ni–N–C materials as efficient electrocatalysts for methanol oxidation

ZIF-8@ZIF-67-Derived Co Embedded into Nitrogen-Doped Carbon Nanotube Hollow Porous Carbon Supported Pt as an Efficient Electrocatalyst for Methanol Oxidation

Cu/Au(111) Surfaces and AuCu Intermetallics for Electrocatalytic Reduction of CO2 in Ionic Liquid Electrolytes

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Cu/Au(111) Surfaces and AuCu Intermetallics for Electrocatalytic Reduction of CO₂ in Ionic Liquid Electrolytes