@article{ed2702fad6ce4da1abc1136f2dbf994f,
title = "Electroless deposition of gold nanoparticles on a glassy carbon surface to attain methylene blue degradation via oxygen reduction reactions",
abstract = "A glassy carbon electrode (GCE) surface was modified with gold nanoparticles (Au NPs) via electroless deposition method. It was observed that a pristine GCE surface does not deposit Au NPs through an electroless process. However, while a GCE surface is electrochemically pretreated then sites having negative charges are generated which enables Au (III) particles to be deposited on its surface. The X-ray photoelectron spectroscopy and scanning electron microscopy were used to characterize the electrode surface. It was found that Au NPs are deposited on the GCE surface (Au-GCE) having flower like shapes. The resultant surface was employed to execute electrocatalytic oxygen reduction reactions (ORR). By analyzing hydrodynamic voltammograms, it was confirmed that ORR undergoes a 2e−transfer pathway and H2O2 is generated on the Au-GCE surface having a standard rate constant (ko) of 5.48 × 10−9 cm s−1 at +0.05 V vs. Ag/AgCl (sat. KCl) in 0.1 M H2SO4. The in-situ generated H2O2 can degrade methylene blue (MB) via Electro-Fenton process. The MB degradation was found to match well with the 1st order kinetic model with a homogeneous rate constant of 4.36 ×10−3 min-1.",
keywords = "Electro-Fenton process, Electro-kinetics, Electroless Au deposition, Methylene blue degradation, Oxygen reduction reaction",
author = "Islam, {Md Tarikul} and Hasan, {Md Mahmudul} and Shabik, {Md Fazle} and Fahadul Islam and Yuki Nagao and Hasnat, {Mohammad A.}",
note = "Funding Information: The authors thank TWAS and SIDA for a research grant ( 19 - 222 RG/CHE/AS_G ), to carry on this research work. The authors also acknowledge the Ministry of Science and Technology (Grant no. 369ES, 2019 - 20 ), Bangladesh, and the research center of Shahjalal University of Science and Technology (Grant. no. PS/2018/3/27 ) for allocating partial grants. Funding Information: The authors thank TWAS and SIDA for a research grant (19-222 RG/CHE/AS_G), to carry on this research work. The authors also acknowledge the Ministry of Science and Technology (Grant no. 369ES, 2019-20), Bangladesh, and the research center of Shahjalal University of Science and Technology (Grant. no. PS/2018/3/27) for allocating partial grants. Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",
year = "2020",
month = nov,
day = "10",
doi = "10.1016/j.electacta.2020.136966",
language = "English",
volume = "360",
journal = "Electrochimica Acta",
issn = "0013-4686",
publisher = "Elsevier Limited",
}