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Design and synthesis of multifunctional metal-free electrocatalyst onto carbon fiber yarns for oxygen reduction, and oxygen and hydrogen evolution reactions

Grant number: 17/00433-5
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): May 01, 2017
Effective date (End): April 30, 2020
Field of knowledge:Interdisciplinary Subjects
Principal Investigator:Hamilton Brandão Varela de Albuquerque
Grantee:Mohmmad Khalid
Home Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated research grant:13/16930-7 - Electrocatalysis V: electrocatalytic processes of chemical and electrical energy interconversion, AP.TEM

Abstract

Electrocatalysis is the heart of the electrochemical energy conversion, in order to optimize rate, selectivity, energy and stability of certain electrochemical reactions - such as oxygen reduction (ORR), oxygen evolution (OER), and hydrogen evolution (HER) - proper catalysts have to be developed and optimized. Precious noble-metals (e.g. Pt, Ru, Ir, and Pd) supported on carbon nanomaterials (e.g. graphene, carbon nanotubes, and carbon black) have been employed to facilitate the ORR, OER and HER, resulting in high catalytic activities. Nevertheless, these noble-metal based catalysts suffer from high cost, scarcity, poor stability, and detrimental environmental effect. Therefore, to achieve large-scale development at low-cost without drawbacks, it is essential to develop alternative catalytic materials. To address this issue, we propose to design a novel catalytic structure comprised of heteroatoms doped-graphene anchored onto carbon fiber yarns by using simple electrochemical technique, instead of expensive CVD and pyrolysis methods. This unique structure of the material will be binder free and will take advantage of the abundant active sites of doped-graphene network and the support of the carbon fiber yarns will have an opportunity to reduce the overpotential of the reactions by enhancing the interfacial conductivity between the yarns and graphene. Fundamentally, this work is aimed at broadening the current understanding of various essential parameters, such as deposition amount of doped-graphene onto carbon fiber yarns, electron-transfer dynamics, morphology, crystallinity, surface area, as well as defects, which impact the performance of an electrocatalyst. Such parameters are critical in the optimization of catalytic activity of the product. (AU)

Scientific publications (7)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PUPPIN, LARA G.; KHALID, MOHD; DA SILVA, GELSON T. T.; RIBEIR, CAUE O; VARELA, HAMILTON; LOPES, OSMANDO F. Electrochemical reduction of CO2 to formic acid on Bi2O2CO3/carbon fiber electrodes. Journal of Materials Research, v. 35, n. 3, p. 272-280, FEB 14 2020. Web of Science Citations: 0.
STEMPIEN, Z.; KHALID, M.; KOZICKI, M.; KOZANECKI, M.; VARELA, H.; FILIPCZAK, P.; PAWLAK, R.; KORZENIEWSKA, E.; SASIADEK, E. In-situ deposition of reduced graphene oxide layers on textile surfaces by the reactive inkjet printing technique and their use in supercapacitor applications. Synthetic Metals, v. 256, OCT 2019. Web of Science Citations: 1.
KHALID, MOHD; HASSAN, AYAZ; HONORATO, ANA M. B.; CRESPILHO, FRANK N.; VARELA, HAMILTON. 8-Hydroxyquinoline-5-sulfonic acid on reduced graphene oxide layers as a metal-free electrode material for supercapacitor applications. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v. 847, AUG 15 2019. Web of Science Citations: 0.
KHALID, MOHD.; HASSAN, AYAZ; HONORATO, ANA M. B.; CRESPILHO, FRANK N.; VARELA, HAMILTON. Nano-flocks of a bimetallic organic framework for efficient hydrogen evolution electrocatalysis. CHEMICAL COMMUNICATIONS, v. 54, n. 78, p. 11048-11051, OCT 7 2018. Web of Science Citations: 4.
KHALID, MOHD; HONORATO, ANA M. B.; TICIANELLI, EDSON A.; VARELA, HAMILTON. Uniformly self-decorated Co3O4 nanoparticles on N, S co-doped carbon layers derived from a camphor sulfonic acid and metal-organic framework hybrid as an oxygen evolution electrocatalyst. JOURNAL OF MATERIALS CHEMISTRY A, v. 6, n. 25, p. 12106-12114, JUL 7 2018. Web of Science Citations: 9.
KHALID, MOHD.; HONORATO, ANA M. B.; VARELA, HAMILTON; DAI, LIMING. Multifunctional electrocatalysts derived from conducting polymer and metal organic framework complexes. NANO ENERGY, v. 45, p. 127-135, MAR 2018. Web of Science Citations: 47.

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