Electrodeposited osmium three-dimensional anodes for direct borohydride fuel cells

V. W.S. Lam; D. C.W. Kannangara; A. Alfantazi; E. L. Gyenge

doi:10.1016/j.jpowsour.2012.03.067

Electrodeposited osmium three-dimensional anodes for direct borohydride fuel cells

V. W.S. Lam, D. C.W. Kannangara, A. Alfantazi, E. L. Gyenge

Chemical and Petroleum Engineering

The University of British Columbia

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

Three-dimensional Os anodes for direct borohydride fuel cells (DBFC) were developed by surfactant assisted electrodeposition of Os on two fibrous graphite substrates, AvCarb™ P75 and GF-S3, respectively. Structural characterization of the electrodes using SEM, TEM, and XPS revealed cluster-like Os deposits composed of nano-sized particles of less than 5 nm in diameter with partially oxidized surfaces. The structural and compositional features of the graphite fiber matrixes had a profound influence on the crystallography of the electrodeposited Os. The polycrystalline Os/AvCarb™ P75 exhibited superior electrocatalytic activity in cyclic voltammetry compared to Os/GF-S3 with respect to oxidation of adsorbed intermediates. To explain the different activity XRD was used to investigate the crystallographic differences between the two electrodes. A DBFC with Nafion ^® 117 membrane and operated at 333 K, with Os/AvCarb™ P75 anode (1.7 mg cm ^-2 Os) and 4 mg cm ^-2 Pt black oxygen cathode catalyst, generated a peak power density of 109 mW cm ^-2 with a standard error of the mean of ±12 mW cm ^-2 at 90% confidence level. The longer-term durability of the newly developed anodes was investigated.

Original language	British English
Pages (from-to)	57-65
Number of pages	9
Journal	Journal of Power Sources
Volume	212
DOIs	https://doi.org/10.1016/j.jpowsour.2012.03.067
State	Published - 15 Aug 2012

Keywords

Direct borohydride fuel cell
Electrodeposition
Three-dimensional electrode

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jpowsour.2012.03.067

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title = "Electrodeposited osmium three-dimensional anodes for direct borohydride fuel cells",

abstract = "Three-dimensional Os anodes for direct borohydride fuel cells (DBFC) were developed by surfactant assisted electrodeposition of Os on two fibrous graphite substrates, AvCarb{\texttrademark} P75 and GF-S3, respectively. Structural characterization of the electrodes using SEM, TEM, and XPS revealed cluster-like Os deposits composed of nano-sized particles of less than 5 nm in diameter with partially oxidized surfaces. The structural and compositional features of the graphite fiber matrixes had a profound influence on the crystallography of the electrodeposited Os. The polycrystalline Os/AvCarb{\texttrademark} P75 exhibited superior electrocatalytic activity in cyclic voltammetry compared to Os/GF-S3 with respect to oxidation of adsorbed intermediates. To explain the different activity XRD was used to investigate the crystallographic differences between the two electrodes. A DBFC with Nafion {\textregistered} 117 membrane and operated at 333 K, with Os/AvCarb{\texttrademark} P75 anode (1.7 mg cm -2 Os) and 4 mg cm -2 Pt black oxygen cathode catalyst, generated a peak power density of 109 mW cm -2 with a standard error of the mean of ±12 mW cm -2 at 90% confidence level. The longer-term durability of the newly developed anodes was investigated.",

keywords = "Direct borohydride fuel cell, Electrodeposition, Three-dimensional electrode",

author = "Lam, {V. W.S.} and Kannangara, {D. C.W.} and A. Alfantazi and Gyenge, {E. L.}",

note = "Funding Information: The authors thank the generous financial support of this work by the Natural Science and Engineering Research Council (NSERC) of the Government of Canada through the Discovery and Discovery Accelerator grant programs. The authors acknowledge Anita Lam for modeling of the XRD data, Maxxam Inc. for acquiring the ICP-MS data, and Surface Science Western for a portion of the XPS analysis and SEM images.",

year = "2012",

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doi = "10.1016/j.jpowsour.2012.03.067",

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T1 - Electrodeposited osmium three-dimensional anodes for direct borohydride fuel cells

AU - Lam, V. W.S.

AU - Kannangara, D. C.W.

AU - Alfantazi, A.

AU - Gyenge, E. L.

N1 - Funding Information: The authors thank the generous financial support of this work by the Natural Science and Engineering Research Council (NSERC) of the Government of Canada through the Discovery and Discovery Accelerator grant programs. The authors acknowledge Anita Lam for modeling of the XRD data, Maxxam Inc. for acquiring the ICP-MS data, and Surface Science Western for a portion of the XPS analysis and SEM images.

PY - 2012/8/15

Y1 - 2012/8/15

N2 - Three-dimensional Os anodes for direct borohydride fuel cells (DBFC) were developed by surfactant assisted electrodeposition of Os on two fibrous graphite substrates, AvCarb™ P75 and GF-S3, respectively. Structural characterization of the electrodes using SEM, TEM, and XPS revealed cluster-like Os deposits composed of nano-sized particles of less than 5 nm in diameter with partially oxidized surfaces. The structural and compositional features of the graphite fiber matrixes had a profound influence on the crystallography of the electrodeposited Os. The polycrystalline Os/AvCarb™ P75 exhibited superior electrocatalytic activity in cyclic voltammetry compared to Os/GF-S3 with respect to oxidation of adsorbed intermediates. To explain the different activity XRD was used to investigate the crystallographic differences between the two electrodes. A DBFC with Nafion ® 117 membrane and operated at 333 K, with Os/AvCarb™ P75 anode (1.7 mg cm -2 Os) and 4 mg cm -2 Pt black oxygen cathode catalyst, generated a peak power density of 109 mW cm -2 with a standard error of the mean of ±12 mW cm -2 at 90% confidence level. The longer-term durability of the newly developed anodes was investigated.

AB - Three-dimensional Os anodes for direct borohydride fuel cells (DBFC) were developed by surfactant assisted electrodeposition of Os on two fibrous graphite substrates, AvCarb™ P75 and GF-S3, respectively. Structural characterization of the electrodes using SEM, TEM, and XPS revealed cluster-like Os deposits composed of nano-sized particles of less than 5 nm in diameter with partially oxidized surfaces. The structural and compositional features of the graphite fiber matrixes had a profound influence on the crystallography of the electrodeposited Os. The polycrystalline Os/AvCarb™ P75 exhibited superior electrocatalytic activity in cyclic voltammetry compared to Os/GF-S3 with respect to oxidation of adsorbed intermediates. To explain the different activity XRD was used to investigate the crystallographic differences between the two electrodes. A DBFC with Nafion ® 117 membrane and operated at 333 K, with Os/AvCarb™ P75 anode (1.7 mg cm -2 Os) and 4 mg cm -2 Pt black oxygen cathode catalyst, generated a peak power density of 109 mW cm -2 with a standard error of the mean of ±12 mW cm -2 at 90% confidence level. The longer-term durability of the newly developed anodes was investigated.

KW - Direct borohydride fuel cell

KW - Electrodeposition

KW - Three-dimensional electrode

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JO - Journal of Power Sources

JF - Journal of Power Sources

ER -

Electrodeposited osmium three-dimensional anodes for direct borohydride fuel cells

Abstract

Keywords

UN SDGs

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