Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics

Carbon dioxide (CO2) is considered as the prime reason for the global warming effect and one of the useful ways to transform it into an array of valuable products is through electrochemical reduction of CO2 (ERC). This process requires an efficient electrocatalyst with high faradaic efficiency at lo...

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Main Authors:	Hossain, S. K. Safdar, Saleem, Junaid, Rahman, SleemUr, Zaidi, Syed Mohammed Javaid, McKay, Gordon, Cheng, C. K.
Format:	Article
Language:	English English
Published:	MDPI 2019
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/24661/ http://umpir.ump.edu.my/id/eprint/24661/ http://umpir.ump.edu.my/id/eprint/24661/ http://umpir.ump.edu.my/id/eprint/24661/1/Synthesis%20and%20Evaluation%20of%20Copper-Supported%20Titanium%20Oxide%20Nanotubes.pdf http://umpir.ump.edu.my/id/eprint/24661/2/Supplementary%20material.pdf

id	ump-24661
recordtype	eprints
spelling	ump-246612019-04-01T04:06:36Z http://umpir.ump.edu.my/id/eprint/24661/ Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics Hossain, S. K. Safdar Saleem, Junaid Rahman, SleemUr Zaidi, Syed Mohammed Javaid McKay, Gordon Cheng, C. K. TP Chemical technology Carbon dioxide (CO2) is considered as the prime reason for the global warming effect and one of the useful ways to transform it into an array of valuable products is through electrochemical reduction of CO2 (ERC). This process requires an efficient electrocatalyst with high faradaic efficiency at low overpotential and enhanced reaction rate. Herein, we report an innovative way of reducing CO2 using copper-metal supported on titanium oxide nanotubes (TNT) electrocatalysts. The TNT support material was synthesized using alkaline hydrothermal process with Degussa (P-25) as a starting material. Copper nanoparticles were anchored on the TNT by homogeneous deposition-precipitation method (HDP) with urea as precipitating agent. The prepared catalysts were tested in a home-made H-cell with 0.5 M NaHCO3 aqueous solution in order to examine their activity for ERC and the optimum copper loading. Continuous gas-phase ERC was carried out in a solid polymer electrolyte (SPE) reactor. The 10% Cu/TNT catalysts were employed in the gas diffusion layer (GDL) on the cathode side with Pt-Ru/C on the anode side. Faradaic efficiencies for the three major products namely methanol, methane, and CO were found to be 4%, 3%, and 10%, respectively at −2.5 V with an overall current density of 120 mA/cm2. The addition of TNT significantly increased the catalytic activity of electrocatalyst for ERC. It is mainly attributed to their better stability towards oxidation, increased CO2 adsorption capacity and stabilization of the reaction intermediate, layered titanates, and larger surface area (400 m2/g) as compared with other support materials. Considering the low cost of TNT, it is anticipated that TNT support electrocatalyst for ECR will gain popularity MDPI 2019 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/24661/1/Synthesis%20and%20Evaluation%20of%20Copper-Supported%20Titanium%20Oxide%20Nanotubes.pdf pdf en http://umpir.ump.edu.my/id/eprint/24661/2/Supplementary%20material.pdf Hossain, S. K. Safdar and Saleem, Junaid and Rahman, SleemUr and Zaidi, Syed Mohammed Javaid and McKay, Gordon and Cheng, C. K. (2019) Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics. Catalysts, 9 (3). pp. 1-19. ISSN 2073-4344 https://doi.org/10.3390/catal9030298 https://doi.org/10.3390/catal9030298
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Hossain, S. K. Safdar Saleem, Junaid Rahman, SleemUr Zaidi, Syed Mohammed Javaid McKay, Gordon Cheng, C. K. Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics
description	Carbon dioxide (CO2) is considered as the prime reason for the global warming effect and one of the useful ways to transform it into an array of valuable products is through electrochemical reduction of CO2 (ERC). This process requires an efficient electrocatalyst with high faradaic efficiency at low overpotential and enhanced reaction rate. Herein, we report an innovative way of reducing CO2 using copper-metal supported on titanium oxide nanotubes (TNT) electrocatalysts. The TNT support material was synthesized using alkaline hydrothermal process with Degussa (P-25) as a starting material. Copper nanoparticles were anchored on the TNT by homogeneous deposition-precipitation method (HDP) with urea as precipitating agent. The prepared catalysts were tested in a home-made H-cell with 0.5 M NaHCO3 aqueous solution in order to examine their activity for ERC and the optimum copper loading. Continuous gas-phase ERC was carried out in a solid polymer electrolyte (SPE) reactor. The 10% Cu/TNT catalysts were employed in the gas diffusion layer (GDL) on the cathode side with Pt-Ru/C on the anode side. Faradaic efficiencies for the three major products namely methanol, methane, and CO were found to be 4%, 3%, and 10%, respectively at −2.5 V with an overall current density of 120 mA/cm2. The addition of TNT significantly increased the catalytic activity of electrocatalyst for ERC. It is mainly attributed to their better stability towards oxidation, increased CO2 adsorption capacity and stabilization of the reaction intermediate, layered titanates, and larger surface area (400 m2/g) as compared with other support materials. Considering the low cost of TNT, it is anticipated that TNT support electrocatalyst for ECR will gain popularity
format	Article
author	Hossain, S. K. Safdar Saleem, Junaid Rahman, SleemUr Zaidi, Syed Mohammed Javaid McKay, Gordon Cheng, C. K.
author_facet	Hossain, S. K. Safdar Saleem, Junaid Rahman, SleemUr Zaidi, Syed Mohammed Javaid McKay, Gordon Cheng, C. K.
author_sort	Hossain, S. K. Safdar
title	Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics
title_short	Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics
title_full	Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics
title_fullStr	Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics
title_full_unstemmed	Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics
title_sort	synthesis and evaluation of copper-supported titanium oxide nanotubes as electrocatalyst for the electrochemical reduction of carbon oxide to organics
publisher	MDPI
publishDate	2019
url	http://umpir.ump.edu.my/id/eprint/24661/ http://umpir.ump.edu.my/id/eprint/24661/ http://umpir.ump.edu.my/id/eprint/24661/ http://umpir.ump.edu.my/id/eprint/24661/1/Synthesis%20and%20Evaluation%20of%20Copper-Supported%20Titanium%20Oxide%20Nanotubes.pdf http://umpir.ump.edu.my/id/eprint/24661/2/Supplementary%20material.pdf
first_indexed	2023-09-18T22:37:27Z
last_indexed	2023-09-18T22:37:27Z
_version_	1777416690863177728

Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics

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