Electrocatalytic reduction of oxygen on bimetallic copper–gold nanoparticles–multiwalled carbon nanotube modified glassy carbon electrode in alkaline solution

Bakır, Çağrı Ceylan; Şahin, Nihat Ege; Polat, Ramazan; Dursun, Zekerya

doi:10.1016/j.jelechem.2011.06.016

Cited by 49 publications

(35 citation statements)

References 50 publications

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“…Alloying Au with transition metals such as Ni (12)(13)(14), Co (15) and Cu (16,17) allows reducing its cost and provides better catalytic characteristics for the oxidation of borohydride. It has been determined that bimetallic catalysts usually show a higher activity and stability than the monometallic ones.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Electrocatalytic Activity of the Nanostructured Au-Cu Catalyst Deposited on the Titanium Surface towards Borohydride Oxidation

Tamašauskaitė–Tamašiūnaitė

Balčiūnaitė

Vaiciukevičienė

et al. 2013

ECS Trans.

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Well-adherent gold-coated copper films (Au/Cu), with particles of a few nanometers in size have been fabricated on the titanium surface by a two-step process which involves electroless copper deposition followed by spontaneous galvanic displacement of Cu by Au from its chloro-complex solution. The morphology and composition of the fabricated catalysts have been characterized using field-emission scanning electron microscopy and energy dispersive X-ray analysis. The electrocatalytic activities of the nanostructured Au(Cu) catalysts deposited on the titanium surface have been investigated towards the oxidation of BH 4 -ions in an alkaline medium by cyclic voltammetry and chronoamperometry. The nanostructured Au(Cu)/Ti catalysts exhibit a significantly higher electrocatalytic activity and stability towards the electrooxidation of BH 4 -ions in an alkaline medium as compared to that of bare Au or Cu/Ti.

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Section: Introductionmentioning

confidence: 99%

Investigation of Electrocatalytic Activity of the Nanostructured Au-Cu Catalyst Deposited on the Titanium Surface towards Borohydride Oxidation

Tamašauskaitė–Tamašiūnaitė

Balčiūnaitė

Vaiciukevičienė

et al. 2013

ECS Trans.

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“…and high current density (h.c.d.) regions, respectively [133][134][135]. Tafel slopes were close to 67.0 AE 1.0 mV/dec at low current density regions and 115.0 AE 1.0 mV/dec at high current density regions for the Pt/C electrocatalyst on RDE and RRDE experiments, indicating that Tafel slope regions change from Temkin to Langmuir conditions for changing coverage of surface by adsorbed oxygen species.…”

Section: Levich and Koutecky´-levich Plotsmentioning

confidence: 64%

Direct Ethanol Fuel Cell on Carbon Supported Pt Based Nanocatalysts

Almeida

Şahin

Olivi

et al. 2016

Nanostructure Science and Technology

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One of the biggest problems nowadays comes from the progressive increase in the concentration of toxic gases due to combustion of fossil fuels, which represents a large part of the energy consumed by the society. The greenhouse gas emissions, especially in large urban centers, reach every year increasingly levels. Besides the large industries, urban transport is another main factor responsible for pollution.The need for cleaner energy sources and converter systems that combine high efficiency and reduction of environmental impacts has attracted increasing interest from the scientific community. In this context, fuel cells, system capable of converting chemical energy into electrical energy, are receiving special attention mainly due to its ability to generate electricity efficiently and not aggressive to the environment. The versatility of such systems is the feasible use of various fuels, efficient energy conversion, silent operation, and high applicability. These make this system an attractive technology for a "clean" future [1].

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“…One way to reduce the Au amount is to disperse Au nanoparticles on a technologically relevant substrate or to use Au‐based catalysts. Recently, alloying of Au with transition metals, such as Ni , Co , , , Cu , and Fe , , allows reducing its cost and provides better catalytic characteristics for the oxidation of BH 4 − . It has been determined that bimetallic catalysts usually show a higher activity and stability than monometallic ones .…”

Section: Introductionmentioning

confidence: 99%

Au Nanoparticles Modified Co/Titania Nanotubes as Electrocatalysts for Borohydride Oxidation

Balčiūnaitė

Tamašauskaitė–Tamašiūnaitė

Santos

et al. 2017

Fuel Cells

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Gold‐cobalt catalysts were deposited on the surface of titania nanotubes (TiO2‐NTs) via galvanic displacement technique. The catalysts were characterized using field emission scanning electron microscopy, energy dispersive X‐ray spectroscopy and inductively coupled plasma optical emission spectroscopy. The electrocatalytic activity of the Au(Co)/TiO2‐NTs catalysts was examined in respect to the oxidation of BH4− ions in an alkaline media by cyclic voltammetry and chronoamperometry. It was found that the Au(Co)/TiO2‐NTs catalysts with Au loadings in the range of 10 up to 59 µgAu cm−2 had a higher activity compared to that of Co/TiO2‐NTs and bare Au. A direct NaBH4‐H2O2 single fuel cell was constructed with the Au(Co)/TiO2‐NTs catalysts as anode and Pt as the cathode. The fuel cell exhibited an open circuit voltage of ca. 1.9 V and peak power densities up to 217 mW cm−2 at 25 °C. The highest specific peak power density of 16.3 kW g−1Au was obtained when employing Au(Co)/TiO2‐NTs with the Au loading of 10 µgAu cm−2 as the anode catalyst.

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Electrocatalytic reduction of oxygen on bimetallic copper–gold nanoparticles–multiwalled carbon nanotube modified glassy carbon electrode in alkaline solution

Cited by 49 publications

References 50 publications

Investigation of Electrocatalytic Activity of the Nanostructured Au-Cu Catalyst Deposited on the Titanium Surface towards Borohydride Oxidation

Investigation of Electrocatalytic Activity of the Nanostructured Au-Cu Catalyst Deposited on the Titanium Surface towards Borohydride Oxidation

Direct Ethanol Fuel Cell on Carbon Supported Pt Based Nanocatalysts

Au Nanoparticles Modified Co/Titania Nanotubes as Electrocatalysts for Borohydride Oxidation

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