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Atomic layer deposition of Pt@CsH_2PO_4 for the cathodes of solid acid fuel cells

Lim, Dae-Kwang and Liu, Jian and Pandey, Shobhit A. and Paik, Haemin and Chisholm, Calum R. I. and Hupp, Joseph T. and Haile, Sossina M. (2018) Atomic layer deposition of Pt@CsH_2PO_4 for the cathodes of solid acid fuel cells. Electrochimica Acta, 288 . pp. 12-19. ISSN 0013-4686. doi:10.1016/j.electacta.2018.07.076.

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Atomic layer deposition (ALD) has been used to apply continuous Pt films on powders of the solid acid CsH_2PO_4 (CDP), in turn, used in the preparation of cathodes in solid acid fuel cells (SAFCs). The film deposition was carried out at 150 °C using trimethyl(methylcyclopentadienyl)platinum (MeCpPtMe_3) as the Pt source and ozone as the reactant for ligand removal. Chemical analysis showed a Pt growth rate of 0.09 ± 0.01 wt%/cycle subsequent to an initial nucleation delay of 84 ± 20 cycles. Electron microscopy revealed the contiguous nature of the films prepared using 200 or more cycles. The cathode overpotential (0.48 ± 0.02 V at a current density of 200 mA/cm^2) was independent of Pt deposition amount beyond the minimum required to achieve these continuous films. The cell electrochemical characteristics were moreover extremely stable with time, with the cathode overpotentials increasing by no more than 10 mV over a 100 h period of measurement. Thus, ALD holds promise as an effective tool in the preparation of SAFC cathodes with high activity and excellent stability.

Item Type:Article
Related URLs:
URLURL TypeDescription
Liu, Jian0000-0001-8552-1400
Hupp, Joseph T.0000-0003-3982-9812
Haile, Sossina M.0000-0002-5293-6252
Alternate Title:Atomic layer deposition of Pt@CsH2PO4 for the cathodes of solid acid fuel cells
Additional Information:© 2018 Elsevier Ltd. Received 3 December 2017, Revised 10 July 2018, Accepted 13 July 2018, Available online 19 July 2018. This research was supported by the U.S. Department of Energy, through ARPA-e contract DE-AR0000495 and the U.S. Department of Energy, Office of Science, Basic Energy Sciences, through grant number DE-FG02-87ER13808. The authors gratefully acknowledge the use of several user facilities at Northwestern University. Specifically, this work made use the EPIC facility of Northwestern University's NUANCE Center, which has received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205); the MRSEC program (NSF DMR-1720139) at the Materials Research Center; the International Institute for Nanotechnology (IIN); and the Keck Foundation; and the State of Illinois, through the IIN. This work also made use of the J. B. Cohen Diffraction X-ray Diffraction Facility supported by the MRSEC program of the National Science Foundation (DMR-1720139) at the Materials Research Center and the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205). Chemical analysis for metal content was performed at the Northwestern University Quantitative Bio-element Imaging Center.
Funding AgencyGrant Number
Advanced Research Projects Agency-Energy (ARPA-E)DE-AR0000495
Department of Energy (DOE)DE-FG02-87ER13808
International Institute for Nanotechnology (IIN)UNSPECIFIED
W. M. Keck FoundationUNSPECIFIED
State of IllinoisUNSPECIFIED
Subject Keywords:Solid acid fuel cell; Atomic layer deposition; CsH2PO4; Platinum film
Record Number:CaltechAUTHORS:20180719-110553542
Persistent URL:
Official Citation:Dae-Kwang Lim, Jian Liu, Shobhit A. Pandey, Haemin Paik, Calum R.I. Chisholm, Joseph T. Hupp, Sossina M. Haile, Atomic layer deposition of Pt@CsH2PO4 for the cathodes of solid acid fuel cells, Electrochimica Acta, Volume 288, 2018, Pages 12-19, ISSN 0013-4686, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87997
Deposited By: Tony Diaz
Deposited On:19 Jul 2018 18:15
Last Modified:16 Nov 2021 00:22

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