Gold/Platinum nanosponges for electrocatalytic oxidation of methanol

Lin, Zong‐Hong; Shih, Zih-Yu; Tsai, Hsiang-Yu; Chang, Huan‐Tsung

doi:10.1039/c0gc00648c

Cited by 30 publications

(23 citation statements)

References 67 publications

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“…In addition, the O 1s peak of 531.87 eV implied that the oxygen (O 2− ) species existed on the surface of products, confirming the presence of nickel and copper oxides. In the binding energy lookup tables for signals from elements and common chemical species, 33 …”

Section: Resultsmentioning

confidence: 99%

Novel-Phase Structural High-Efficiency Anode Catalyst for Methanol Fuel Cells: α-(NiCu)₃Pd Nanoalloy

et al. 2014

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An approach has been explored to highly improve the catalytic activity and stability for methanol oxidation reaction (MOR) by using dominant α-(NiCu) 3 Pd phase-structural NiCuPd nanoparticles (NPs) as anode catalysts. The NiCuPd alloy NPs are monodispersed with the diameter of ∼10 nm and have been prepared by the reduction of Pd(acac) 2 , Ni(acac) 2 , and Cu(acac) 2 following alloying growth process. In the Ni−Cu−Pd alloy system, Ni atoms fused in Cu 3 Pd phase to form α-(NiCu) 3 Pd phase together with NiCuPd solid solution phase. As Ni concentration gradually enriched, the crystallinity of α-(NiCu) 3 Pd became higher, while its percentage decreased by one degree. Owing to the synergistic effect between components and facet atom arrangement, the catalytic activity and stability of NiCuPd NPs can be adjusted toward the MOR in alkaline media. The maximized crystallinity of α-(NiCu) 3 Pd results in the largest catalytic activity. Compared with commercial Pd/C with (111) facets, α-(NiCu) 3 Pd phase with (117) facets afforded a more open-atom arrangement surface and exhibited the remarkable catalytic activity and stability. Containing maximized crystallinity of α-(NiCu) 3 Pd, Ni 63 Cu 12 Pd 25 NP-modified electrode, afforded the highest catalytic activity (333 mA·mg −1 ) toward the MOR, which is about 2.5 times higher than that of the commercial Pd/C-modified one (145 mA·mg −1 ). Combining the advantages of high electrochemical activity, stability, and economical effectiveness, the novel phase of α-(NiCu) 3 Pd has great potential as an anode catalyst for methanol fuel cells.

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Section: Resultsmentioning

confidence: 99%

Novel-Phase Structural High-Efficiency Anode Catalyst for Methanol Fuel Cells: α-(NiCu)₃Pd Nanoalloy

et al. 2014

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“…One of the main drawbacks of DMFC is slow kinetics of the methanol oxidation reaction at the anode due to production of intermediate species and poisoning of the catalysts, which can lead to high overpotentials and limitation in the performance of DMFCs. Noble metals, binary or ternary alloys and their composite such as Pt-Ru [3], Pd-Fe [4], Pt-Sn [5], Au-Pt [6], Pt-Cu [7], Pt-polyaniline [8] and Ru-deposited NiZn [9] Electronic supplementary material: The online version of this article (https:// doi.org / 10.1007/ s12034-018-1580-8) contains supplementary material, which is available to authorized users.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of MCM-41 nanoparticles from stem of common reed ash silica and their application as substrate in electrooxidation of methanol

2018

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In this work, stem of common reed ash (SCRA) is introduced as a new source of silica in the preparation of mesoporous materials. Mesoporous silicate MCM-41 nanoparticles were synthesized hydrothermally using sodium silicate prepared from SCRA as a silica source. The characterization of MCM-41was carried out by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), N 2 adsorption/desorption (BET) and transmission electron microscopy (TEM). SEM shows that MCM-41 nanoparticles are sphere-like with size in the range of 30-50 nm with some degree of agglomeration. TEM image of the synthesized sample shows the open framework structure of MCM-41. A type IV isotherm can be observed from adsorption/desorption curves, which is the characteristic of mesoporous materials. The prepared MCM-41 nanoparticles were used as substrate to facilitate the oxidation of methanol through the modification with an electroactive species. The modification was achieved by impregnation of MCM-41 pores with Ni 2+ ions (Ni-doped MCM-41). A modified carbon paste electrode (CPE) was prepared by mixing Ni-doped MCM-41 with carbon paste (NiMCM-41CPE). Cyclic voltammetry of NiMCM-41CPE shows an increment in current density of methanol oxidation in comparison with CPE in alkaline solution. Moreover, a decrease in the overpotential of methanol oxidation occurred on the surface of modified electrode. The effects of some parameters such as scan rate and methanol concentration are also investigated on the behaviour of NiMCM-41CPE. Also, the heterogeneous electron transfer rate for the catalytic reaction (k) of methanol is calculated.

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“…[7][8][9] However,s elf-poisoning caused by the strong adsorption of carbonaceousi ntermediates on the Pt surface, limited Pt resources, and the associated high cost of Pt are among the factors restricting the early commercialization of DMFCs and Li-O 2 batteries. [2][3][4][5][6]10] Pt-based bimetallic nanocatalysts such as PtPd, [11][12][13][14][15][16][17][18] PtPdTe, [19] PtRu, [20,21] PtNi, [22,23] PtCo, [24][25][26] PtAu, [27][28][29] and PtSn, [30,31] as well as non-Pt-basedn anocatalysts, [32][33][34][35][36][37][38] have been proposed to overcome these obstacles. Among the various metalsu sed to form bimetallic nanocatalystsw ith Pt, Pd is advantageous because of its relatively low differencei nr educ-tion potentiala nd negligiblel attice mismatch with Pt.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Composition‐Controlled Graphene‐Supported PtPd Alloy Nanocatalysts and Their Applications in Methanol Electro‐Oxidation and Lithium‐Oxygen Batteries

Bui

Kim

et al. 2017

Chemistry A European J

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A new and simple approach is reported for the synthesis of uniformly dispersed PtPd alloy nanocatalysts supported on graphene nanoplatelets (GNPs) (PtPd-GNPs) through the introduction of bifunctional materials, which can modify the GNP surface and simultaneously reduce metal ions. With the use of poly(4-styrenesulfonic acid), poly(vinyl pyrrolidone), poly(diallyldimethylammonium chloride), and poly(vinyl alcohol) as bifunctional materials, PtPd-GNPs can be produced through a procedure that is far simpler than previously reported methods. The as-prepared nanocrystals on GNPs clearly exhibit uniform PtPd alloy structures of around 2 nm in size, which are strongly anchored and well distributed on the GNP sheets. The Pt/Pd atomic ratio and loading density of the nanocrystals on the GNPs are controlled easily by changing the metal precursor feed ratio and the mass ratio of GNP to the metal precursor, respectively. As a result of the synergism between Pt and Pd, the as-prepared PtPd-GNPs exhibit markedly enhanced electrocatalytic performance during methanol electro-oxidation compared with monometallic Pt-GNP or commercially available Pt/C. Furthermore, the PtPd-GNP nanocatalysts also show greatly enhanced catalytic activity toward the oxygen reduction/evolution reaction in a lithium-oxygen (Li-O ) process, resulting in greatly improved cycling stability of a Li-O battery.

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Gold/Platinum nanosponges for electrocatalytic oxidation of methanol

Cited by 30 publications

References 67 publications

Novel-Phase Structural High-Efficiency Anode Catalyst for Methanol Fuel Cells: α-(NiCu)₃Pd Nanoalloy

Novel-Phase Structural High-Efficiency Anode Catalyst for Methanol Fuel Cells: α-(NiCu)₃Pd Nanoalloy

Synthesis of MCM-41 nanoparticles from stem of common reed ash silica and their application as substrate in electrooxidation of methanol

Facile Synthesis of Composition‐Controlled Graphene‐Supported PtPd Alloy Nanocatalysts and Their Applications in Methanol Electro‐Oxidation and Lithium‐Oxygen Batteries

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Gold/Platinum nanosponges for electrocatalytic oxidation of methanol

Cited by 30 publications

References 67 publications

Novel-Phase Structural High-Efficiency Anode Catalyst for Methanol Fuel Cells: α-(NiCu)3Pd Nanoalloy

Novel-Phase Structural High-Efficiency Anode Catalyst for Methanol Fuel Cells: α-(NiCu)3Pd Nanoalloy

Synthesis of MCM-41 nanoparticles from stem of common reed ash silica and their application as substrate in electrooxidation of methanol

Facile Synthesis of Composition‐Controlled Graphene‐Supported PtPd Alloy Nanocatalysts and Their Applications in Methanol Electro‐Oxidation and Lithium‐Oxygen Batteries

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Novel-Phase Structural High-Efficiency Anode Catalyst for Methanol Fuel Cells: α-(NiCu)₃Pd Nanoalloy

Novel-Phase Structural High-Efficiency Anode Catalyst for Methanol Fuel Cells: α-(NiCu)₃Pd Nanoalloy