High performance octahedral PtNi/C catalysts investigated from rotating disk electrode to membrane electrode assembly
Octahedral PtNi/C catalysts have demonstrated superior catalytic performance in oxygen reduction reaction (ORR) over commercial Pt/C with rotating disk electrode (RDE). However, it is not trivial to translate such promising results to real-world membrane-electrode assembly (MEA). In this work, we have synthesized octahedral PtNi/C catalysts using poly(diallyldimethylammonium chloride) (PDDA) as a capping agent and investigated their performance from RDE to MEA. In RDE, mass activity and specific activity of the optimized octahedral PtNi/C catalyst for oxygen reduction reaction (ORR) are nearly 19 and 28 times high of the state-of-the-art commercial Pt/C, respectively. At MEA level, the octahedral PtNi/C catalyst exhibits excellent power generation performance and durability paired with commercial Pt/C anode. Its cell voltage at 1,000 mA·cm−2 reaches 0.712 V, and maximum power density is 881.6 mW·cm−2 and its performance attenuation is also less, around 11.8% and 7% under galvanostatic condition of 1,000 mA·cm−2 for 100 h. Such results are investiaged by thermodynamic analysis and fundametal performance modeling, which indicate the single cell performance can be further improved by reducing the size of PtNi/C catalyst agglomerates. Such encouraging results have demonstrated the feasibility to convey the superior performance of octahedral PtNi/C from RDE to MEA.
Keywordsproton exchange membrane fuel cell (PEMFC) octahedral PtNi/C oxygen reduction reaction (ORR) durability membrane electrode assembly (MEA)
Unable to display preview. Download preview PDF.
The authors appreciate the National Natural Science Foundation of China (No. 21676204) and the Program of Ministry of Science & Technology of China (No. 2018YFB0106503) for financial support.
- Gu, W.; Baker, D. R.; Liu, Y.; Gasteiger, H. A. Proton Exchange Membrane Fuel Cell (PEMFC) Down-the-channel Performance Model. In Handbook of Fuel Cells: Advances in Electrocatalysis, Materials, Diagnostics and Durability. Vielstich, W.; Gasteiger, H. A.; Yokokawa, H., Eds.; John Wiley & Sons: Chichester, 2009; pp 631–657.CrossRefGoogle Scholar
- Moulder, J. F.; Stickle, W. F.; Sobol, P. E.; Bomben, K. D. Handbook of X Ray Photoelectron Spectroscopy: A Reference Book of Standard Spectra for Identification and Interpretation of Xps Data; Minnesota: Perkin-Elmer Corporation, 1992.Google Scholar
- Zhu, S. Y.; Zheng, J. S.; Huang, J.; Dai, N. N.; Li, P.; Zheng, J. P. Fabrication of three-dimensional buckypaper catalyst layer with Pt nanoparticles supported on polyelectrolyte functionalized carbon nanotubes for proton exchange membrane fuel cells. J. Power Sources 2018, 393, 19–31.CrossRefGoogle Scholar