Platinum-plated nanoporous gold: An efficient, low Pt loading electrocatalyst for PEM fuel cells
Zeis R, Mathur A, Fritz G, Lee J, Erlebacher J (2007)
Publication Type: Journal article
Publication year: 2007
Journal
Book Volume: 165
Pages Range: 65-72
Issue: 1
DOI: 10.1016/j.jpowsour.2006.12.007
Abstract
Platinum-plated nanoporous gold leaf (Pt-NPGL) is made by coating a conformal, atomically thin skin of platinum over the high surface area pores of a thin membrane of nanoporous gold. Because Pt loading in Pt-NPGL can be controlled down to 0.01 mg cm−2 using only simple benchtop chemistry, the material holds promise as a low Pt loading, carbon-free electrocatalyst. Here, we report successful use of Pt-NPGL as a catalyst in proton exchange membrane (PEM) fuel cells. Stable and high performance Pt-NPGL/Nafion membrane electrode assemblies (MEAs) were made using a stamping technique. The performance of Pt-NPGL MEAs is comparable to conventional carbon-supported nanoparticles-based MEAs with much higher loading, generating an output power density of up to 4.5 kW g−1 Pt in our non-optimized test configuration. Correlations between the performance of Pt-NPGL MEAs, the electrochemically accessible surface area, and material microstructure are discussed. Our success in using Pt-NPGL as a fuel cell catalyst suggests that creating precious metals skins over nanoporous metal supports is a viable strategy for designing new catalysts for PEM fuel cells. This promising approach allows tailoring catalytic activity by engineering precious metal/substrate interactions, employs materials with dual functionality acting both as current collector and catalyst, and may avoid the sintering problems plaguing conventional nanoparticle-based catalysts.
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APA:
Zeis, R., Mathur, A., Fritz, G., Lee, J., & Erlebacher, J. (2007). Platinum-plated nanoporous gold: An efficient, low Pt loading electrocatalyst for PEM fuel cells. Journal of Power Sources, 165, 65-72. https://doi.org/10.1016/j.jpowsour.2006.12.007
MLA:
Zeis, Roswitha, et al. "Platinum-plated nanoporous gold: An efficient, low Pt loading electrocatalyst for PEM fuel cells." Journal of Power Sources 165 (2007): 65-72.
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