Exploration of carbon additives to the synthesis of Cu2Mo6S8 structures and their electrocatalytic activity in oxygen reduction reaction

Date

2021-12-01

Author

Sürücü, Gökhan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

255
views

3
downloads

Catalytic processes are contemplated as break point in generating alternative and sus-tainable energy platforms. The cathodic oxygen reduction reaction (ORR) is an importantcatalytic system, mainly finding practice in fuel cell and metal-air battery technologies.This work presents the synthesis, structural characterization and electrocatalytic proper-ties of three different Cu2Mo6S8structures as alternative ORR electrocatalysts. The effect ofdifferent carbon additives during synthesis was studied and no positive influence of thecarbon addition was indicated. Our findings show that only the bare Cu2Mo6S8 enhancesthe ORR electro-performance to class with the state-of-the-art ORR catalysts. Excellentstability of 10,000 consecutive ORR cycles, a superior onset potential of 0.894 V and half-wave (E1/2) potential of 0.641 V vs. reversible hydrogen electrode (RHE) increase the note-worthiness of the Cu2Mo6S8electrodes. Aside from experimental investigations, densityfunctional theory calculations deliver profound knowledge on the structural and electronicproperties (electronic band structure, partial density of states and electron density) of Cu2Mo6S8.

Subject Keywords

Chevrel phases , Cu2Mo6S8 , Oxygen reduction reaction, Density functional theory, Lattice dynamic properties

URI

https://hdl.handle.net/11511/95001

Journal

International Journal Of Hydrogen Energy

DOI

https://doi.org/10.1016/j.ijhydene.2021.11.180

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

CHARACTERIZATION OF LATENT THERMAL ENERGY IN A STORAGE UNIT WITH FIBONACCI-SEQUENCE-INSPIRED FINS Baghaei Oskouei, Seyedmohsen; Bayer, Özgür; Department of Mechanical Engineering (2023-1-19) Latent thermal energy storage (LTES) is a viable method to mitigate one of the main problems with renewable energy sources, such as solar energy, which is their intermittent nature. LTES units take advantage of the large latent heat of fusion in phase change materials (PCMs) to store a substantial amount of energy in a relatively small volume, making them efficient and economical. The major challenge with PCMs is their low thermal conductivity, eventuating long melting (charging) and solidification (dischar...
Novel investigation of pyrolysis mechanisms and kinetics for functional groups in biomass matrix Liu, Ruijia; Liu, Guijian; Yousaf, Balal; Niu, Zhiyuan; Abbas, Qumber (2022-01-01) Biomass, as a renewable and sustainable energy resource, can be converted into environmentally friendly and practically valuable biofuels and chemical materials via pyrolysis. However, the process optimization and pyrolysis efficiency are restricted by the limited perception of the complicated mechanisms and kinetics for biomass pyrolysis. Here, to establish an in-depth mechanism model for biomass pyrolysis, we presented a novel investigation for the thermal evolutions and pyrolysis kinetics of the function...
Simulation of geothermal reservoirs with high amount of carbon dioxide Küçük, Serhat; Akın, Serhat; Department of Petroleum and Natural Gas Engineering (2018) Geothermal energy is always attributed as a sustainable and environmentally friendly source of energy. But in some cases, amount of the greenhouse gas emissions from geothermal fields become a big issue. Kızıldere Geothermal Field, one of the most important and large scale geothermal fields of the world, is a subject of these issues, experiencing excess amount of CO2 production rates and a rapid decline in the reservoir pressures. This study aims to construct a numerical model of the Kızıldere Geothermal Fi...
Modeling and design of reactor for hydrogen production using non-stoichiometric oxides Yılmaz, Arda; Kıncal, Serkan; Department of Chemical Engineering (2017) Nowadays countries investigate to improve alternative energy technologies such as solar power, biomass, wind energy, hydrogen etc. Hydrogen gas is very useful energy carrier and fuel cells produce electricity through hydrogen gas. Hydrogen production technologies are also investigated by many researches due to its high cost production. Thermochemical production way is one of the hydrogen production methods. Solar energy is also clean, renewable and alternative energy source. It is used for heating reaction ...
MODELING OF BIPOLAR PLATES FOR PROTON EXCHANGE MEMBRANE FUEL CELLS Ekiz, Ahmet; Camci, Talha; Turkmen, Ibrahim; SANKIR, MEHMET; USLU, SITKI; Baker, Derek Keıth; Agar, Ertan (2011-09-01) Fuel cell technology is one of the most economic and efficient ways to utilize hydrogen energy. Various types of fuel cells are present regarding the fuel type and amount of power produced. Among these, proton exchange membrane fuel cells (PEMFCs) are very promising. In this work, a 2D proton exchange membrane fuel cell unit cell was modeled using Comsol Multiphysics software. Cell section was taken parallel to flow direction. Obstacles with various geometries were placed in the flow channel in order to for...

Citation Formats

G. Sürücü, “Exploration of carbon additives to the synthesis of Cu2Mo6S8 structures and their electrocatalytic activity in oxygen reduction reaction,” International Journal Of Hydrogen Energy, vol. 46, no. 80, pp. 1–11, 2021, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/95001.