Performance of a novel non-platinum cathode catalyst for direct methanol fuel cells

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Currently, platinum is used as the cathode catalyst in direct methanol fuel cells (DMFCs). However, platinum reduces the number of active sites for the oxygen reduction reaction (ORR) due to the reaction between platinum and methanol and the strong adsorption of carbon monoxide molecules on the platinum surface, and in addition, platinum is very expensive. Hence, this study proposes cobalt phthalocyanine/carbon-tungsten oxide nanowires (W18O49) as a non-platinum catalyst for the cathode side of a DMFC. We determined the kinetic parameters of the catalyst and investigated the factors affecting the reaction. The factors involved in the examination of the significant parameters were the synthetic method, the pyrolysis temperature, the mass ratio of CoPc to carbon, the mass ratio of CoPc/C to tungsten hexachloride and the molarity of tungsten hexachloride. The optimum parameters were determined to be a pyrolysis temperature of 600 °C and a mass ratio of CoPc/C:WCl6 of 1.90. These conditions produced a peak potential at 0.63 V vs. RHE, a mass activity of 1.76 A gcatalyst−1 at 0.65 V, an average electron transfer number of 3.9 with water as the main product, and an electron transfer number of 3.9 at 0.65 V. Finally, the results showed that the non-platinum catalyst (which is less expensive than platinum) has similar characteristics to platinum. The single cell performance test showed that the power density is 9.0 mW cm−2. The catalyst has comparable performance with other macrocycle catalysts with modified structures.

Original languageEnglish
Pages (from-to)293-307
Number of pages15
JournalEnergy Conversion and Management
Volume145
DOIs
Publication statusPublished - 1 Aug 2017

Fingerprint

Direct methanol fuel cells (DMFC)
Platinum
Cathodes
Catalysts
Tungsten
Pyrolysis
Carbon
Electrons
Kinetic parameters
Carbon monoxide
Nanowires
Cobalt
Methanol
Adsorption
Temperature
Molecules
Oxides
Oxygen
Water

Keywords

  • Direct methanol fuel cell
  • Non-platinum catalyst
  • Oxygen reduction reaction

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

Performance of a novel non-platinum cathode catalyst for direct methanol fuel cells. / Karim, N. A.; Kamarudin, Siti Kartom; Loh, Kee Shyuan.

In: Energy Conversion and Management, Vol. 145, 01.08.2017, p. 293-307.

Research output: Contribution to journalArticle

@article{0c8f338c5f4a4bc6b6fca32f65ddae64,
title = "Performance of a novel non-platinum cathode catalyst for direct methanol fuel cells",
abstract = "Currently, platinum is used as the cathode catalyst in direct methanol fuel cells (DMFCs). However, platinum reduces the number of active sites for the oxygen reduction reaction (ORR) due to the reaction between platinum and methanol and the strong adsorption of carbon monoxide molecules on the platinum surface, and in addition, platinum is very expensive. Hence, this study proposes cobalt phthalocyanine/carbon-tungsten oxide nanowires (W18O49) as a non-platinum catalyst for the cathode side of a DMFC. We determined the kinetic parameters of the catalyst and investigated the factors affecting the reaction. The factors involved in the examination of the significant parameters were the synthetic method, the pyrolysis temperature, the mass ratio of CoPc to carbon, the mass ratio of CoPc/C to tungsten hexachloride and the molarity of tungsten hexachloride. The optimum parameters were determined to be a pyrolysis temperature of 600 °C and a mass ratio of CoPc/C:WCl6 of 1.90. These conditions produced a peak potential at 0.63 V vs. RHE, a mass activity of 1.76 A gcatalyst−1 at 0.65 V, an average electron transfer number of 3.9 with water as the main product, and an electron transfer number of 3.9 at 0.65 V. Finally, the results showed that the non-platinum catalyst (which is less expensive than platinum) has similar characteristics to platinum. The single cell performance test showed that the power density is 9.0 mW cm−2. The catalyst has comparable performance with other macrocycle catalysts with modified structures.",
keywords = "Direct methanol fuel cell, Non-platinum catalyst, Oxygen reduction reaction",
author = "Karim, {N. A.} and Kamarudin, {Siti Kartom} and Loh, {Kee Shyuan}",
year = "2017",
month = "8",
day = "1",
doi = "10.1016/j.enconman.2017.05.003",
language = "English",
volume = "145",
pages = "293--307",
journal = "Energy Conversion and Management",
issn = "0196-8904",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Performance of a novel non-platinum cathode catalyst for direct methanol fuel cells

AU - Karim, N. A.

AU - Kamarudin, Siti Kartom

AU - Loh, Kee Shyuan

PY - 2017/8/1

Y1 - 2017/8/1

N2 - Currently, platinum is used as the cathode catalyst in direct methanol fuel cells (DMFCs). However, platinum reduces the number of active sites for the oxygen reduction reaction (ORR) due to the reaction between platinum and methanol and the strong adsorption of carbon monoxide molecules on the platinum surface, and in addition, platinum is very expensive. Hence, this study proposes cobalt phthalocyanine/carbon-tungsten oxide nanowires (W18O49) as a non-platinum catalyst for the cathode side of a DMFC. We determined the kinetic parameters of the catalyst and investigated the factors affecting the reaction. The factors involved in the examination of the significant parameters were the synthetic method, the pyrolysis temperature, the mass ratio of CoPc to carbon, the mass ratio of CoPc/C to tungsten hexachloride and the molarity of tungsten hexachloride. The optimum parameters were determined to be a pyrolysis temperature of 600 °C and a mass ratio of CoPc/C:WCl6 of 1.90. These conditions produced a peak potential at 0.63 V vs. RHE, a mass activity of 1.76 A gcatalyst−1 at 0.65 V, an average electron transfer number of 3.9 with water as the main product, and an electron transfer number of 3.9 at 0.65 V. Finally, the results showed that the non-platinum catalyst (which is less expensive than platinum) has similar characteristics to platinum. The single cell performance test showed that the power density is 9.0 mW cm−2. The catalyst has comparable performance with other macrocycle catalysts with modified structures.

AB - Currently, platinum is used as the cathode catalyst in direct methanol fuel cells (DMFCs). However, platinum reduces the number of active sites for the oxygen reduction reaction (ORR) due to the reaction between platinum and methanol and the strong adsorption of carbon monoxide molecules on the platinum surface, and in addition, platinum is very expensive. Hence, this study proposes cobalt phthalocyanine/carbon-tungsten oxide nanowires (W18O49) as a non-platinum catalyst for the cathode side of a DMFC. We determined the kinetic parameters of the catalyst and investigated the factors affecting the reaction. The factors involved in the examination of the significant parameters were the synthetic method, the pyrolysis temperature, the mass ratio of CoPc to carbon, the mass ratio of CoPc/C to tungsten hexachloride and the molarity of tungsten hexachloride. The optimum parameters were determined to be a pyrolysis temperature of 600 °C and a mass ratio of CoPc/C:WCl6 of 1.90. These conditions produced a peak potential at 0.63 V vs. RHE, a mass activity of 1.76 A gcatalyst−1 at 0.65 V, an average electron transfer number of 3.9 with water as the main product, and an electron transfer number of 3.9 at 0.65 V. Finally, the results showed that the non-platinum catalyst (which is less expensive than platinum) has similar characteristics to platinum. The single cell performance test showed that the power density is 9.0 mW cm−2. The catalyst has comparable performance with other macrocycle catalysts with modified structures.

KW - Direct methanol fuel cell

KW - Non-platinum catalyst

KW - Oxygen reduction reaction

UR - http://www.scopus.com/inward/record.url?scp=85019060414&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85019060414&partnerID=8YFLogxK

U2 - 10.1016/j.enconman.2017.05.003

DO - 10.1016/j.enconman.2017.05.003

M3 - Article

AN - SCOPUS:85019060414

VL - 145

SP - 293

EP - 307

JO - Energy Conversion and Management

JF - Energy Conversion and Management

SN - 0196-8904

ER -