@article{MOURA2024113182,

title = {Experimental and theoretical studies of WO3/Vulcan XC-72 electrocatalyst enhanced H2O2 yield ORR performed in acid and alkaline medium},

author = {João Paulo C. Moura and Lanna E. B. Lucchetti and Caio M. Fernandes and Aline B. Trench and Camila N. Lange and Bruno L. Batista and James M. de Almeida and Mauro C. Santos},

url = {https://www.sciencedirect.com/science/article/pii/S2213343724013125},

doi = {https://doi.org/10.1016/j.jece.2024.113182},

issn = {2213-3437},

year  = {2024},

date = {2024-03-06},

urldate = {2024-01-01},

journal = {Journal of Environmental Chemical Engineering},

volume = {12},

number = {4},

pages = {113182},

abstract = {The oxygen reduction reaction (ORR) plays a pivotal role in clean energy generation and sustainable chemical production, particularly in the synthesis of hydrogen peroxide (H2O2). In this study, WO3/Vulcan-XC72 electrocatalysts have been synthesized and characterized for ORR applications. We assessed the ratio of WO3 to Vulcan-XC72 and investigated the impact of electrolytes pH (covering acidic and alkaline media) on the ORR process. The results revealed that WO3 with a monoclinic crystalline phase and nanoflower-like morphology was successfully synthesized, and confirmed an improvement in surface properties, with an increase in hydrophilicity and superficial oxygenated species. Electrochemical studies showed that WO3/C was the most selective for H2O2 electrogeneration, compared to pure Vulcan-XC72, in both acidic and alkaline media. These results indicate that the ORR on the WO3/C electrocatalyst surface has a pH-dependent mechanism. Using WO3/C GDEs, an accumulation of 862 mg L-1 of H2O2 was achieved after 120 min of electrolysis at 100 mA cm-2. The higher selectivity of WO3/C could be related to the presence of more oxygen functional acid species on the catalyst surface and increased hydrophilicity compared to pure Vulcan, as well as a synergistic effect of the WO3 nanoflowers in ORR, confirmed by theoretical calculations. The results reveal that WO3/Vulcan is a promising catalyst for H2O2 electrogeneration via the ORR.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{LUCCHETTI2024108461,

title = {Cerium doped graphene-based materials towards oxygen reduction reaction catalysis},

author = {Lanna E. B. Lucchetti and Pedro A. S. Autreto and Mauro C. Santos and James M. de Almeida},

url = {https://www.sciencedirect.com/science/article/pii/S2352492824004410},

doi = {https://doi.org/10.1016/j.mtcomm.2024.108461},

issn = {2352-4928},

year  = {2024},

date = {2024-02-23},

urldate = {2024-01-01},

journal = {Materials Today Communications},

volume = {38},

pages = {108461},

abstract = {With the global transition towards cleaner energy and sustainable processes, the demand for efficient catalysts, especially for the oxygen reduction reaction, has gained attention from the scientific community. This research work investigates cerium-doped graphene-based materials as catalysts for this process with density functional theory calculations. The electrochemical performance of Ce-doped graphene was assessed within the computation hydrogen electrode framework. Our findings reveal that Ce doping, especially when synergized with an oxygen atom, shows improved catalytic activity and selectivity. For instance, Ce doping in combination with an oxygen atom, located near a border, can be selective for the 2-electron pathway. Overall, the combination of Ce doping with structural defects and oxygenated functions lowers the reaction free energies for the oxygen reduction compared to pure graphene, and consequently, might improve the catalytic activity. This research sheds light from a computational perspective on Ce-doped carbon materials as a sustainable alternative to traditional costly metal-based catalysts, offering promising prospects for green energy technologies and electrochemical applications.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{TRENCH2024141456,

title = {Hydrogen peroxide electrogeneration from O2 electroreduction: A review focusing on carbon electrocatalysts and environmental applications},

author = {Aline B. Trench and Caio Machado Fernandes and João Paulo C. Moura and Lanna E. B. Lucchetti and Thays S. Lima and Vanessa S. Antonin and James M. de Almeida and Pedro A. S. Autreto and Irma Robles and Artur J. Motheo and Marcos R. V. Lanza and Mauro C. Santos},

url = {https://www.sciencedirect.com/science/article/pii/S0045653524003497},

doi = {https://doi.org/10.1016/j.chemosphere.2024.141456},

issn = {0045-6535},

year  = {2024},

date = {2024-02-15},

urldate = {2024-02-15},

journal = {Chemosphere},

pages = {141456},

abstract = {Hydrogen peroxide (H2O2) stands as one of the foremost utilized oxidizing agents in modern times. The established method for its production involves the intricate and costly anthraquinone process. However, a promising alternative pathway is the electrochemical hydrogen peroxide production, accomplished through the oxygen reduction reaction via a 2-electron pathway. This method not only simplifies the production process but also upholds environmental sustainability, especially when compared to the conventional anthraquinone method. In this review paper, recent works from the literature focusing on the 2-electron oxygen reduction reaction promoted by carbon electrocatalysts are summarized. The practical applications of these materials in the treatment of effluents contaminated with different pollutants (drugs, dyes, pesticides, and herbicides) are presented. Water treatment aiming to address these issues can be achieved through advanced oxidation electrochemical processes such as electro-Fenton, solar-electro-Fenton, and photo-electro-Fenton. These processes are discussed in detail in this work and the possible radicals that degrade the pollutants in each case are highlighted. The review broadens its scope to encompass contemporary computational simulations focused on the 2-electron oxygen reduction reaction, employing different models to describe carbon-based electrocatalysts. Finally, perspectives and future challenges in the area of carbon-based electrocatalysts for H2O2 electrogeneration are discussed. This review paper presents a forward-oriented viewpoint of present innovations and pragmatic implementations, delineating forthcoming challenges and prospects of this ever-evolving field.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Antonin2023,

title = {Sodium niobate microcubes decorated with ceria nanorods for hydrogen peroxide electrogeneration: An experimental and theoretical study},

author = {Vanessa S. Antonin and Lanna E. B. Lucchetti and Felipe M. Souza and Victor S. Pinheiro and João P.C. Moura and Aline B. Trench and James M. de Almeida and Pedro A. S. Autreto and Marcos R.V. Lanza and Mauro C. Santos},

doi = {10.1016/j.jallcom.2023.171363},

issn = {0925-8388},

year  = {2023},

date = {2023-07-14},

urldate = {2023-11-00},

journal = {Journal of Alloys and Compounds},

volume = {965},

publisher = {Elsevier BV},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Lucchetti2023,

title = {Unravelling catalytic activity trends in ceria surfaces toward the oxygen reduction and water oxidation reactions},

author = {Lanna E. B. Lucchetti and Pedro A. S. Autreto and James M. de Almeida and Mauro C. Santos and Samira Siahrostami},

doi = {10.1039/d3re00027c},

issn = {2058-9883},

year  = {2023},

date = {2023-05-30},

journal = {React. Chem. Eng.},

volume = {8},

number = {6},

pages = {1285--1293},

publisher = {Royal Society of Chemistry (RSC)},

abstract = {Different facets of ceria exhibit activities for the entire spectrum of oxygen electrochemistry.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}