Progress in nanostructured (Fe or Co)/N/C non-noble metal electrocatalysts for fuel cell oxygen reduction reaction

2018 ◽  
Vol 262 ◽  
pp. 326-336 ◽  
Author(s):  
Lei Zhang ◽  
David P. Wilkinson ◽  
Yuyu Liu ◽  
Jiujun Zhang
2018 ◽  
Vol 165 (15) ◽  
pp. J3008-J3015 ◽  
Author(s):  
Yunfeng Zhan ◽  
Fangyan Xie ◽  
Hao Zhang ◽  
Zhipeng Lin ◽  
Jilin Huang ◽  
...  

2012 ◽  
Vol 43 (2) ◽  
pp. 159-169 ◽  
Author(s):  
Alessandro H. A. Monteverde Videla ◽  
Lei Zhang ◽  
Jenny Kim ◽  
Juqin Zeng ◽  
Carlotta Francia ◽  
...  

Catalysts ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 841
Author(s):  
Marius Gollasch ◽  
Julia Müller-Hülstede ◽  
Henrike Schmies ◽  
Dana Schonvogel ◽  
Peter Wagner ◽  
...  

Lowering or eliminating the noble-metal content in oxygen reduction fuel cell catalysts could propel the large-scale introduction of commercial fuel cell systems. Several noble-metal free catalysts are already under investigation with the metal-nitrogen-carbon (Me-N-C) system being one of the most promising. In this study, a systematic approach to investigate the influence of metal ratios in bimetallic Me-N-C fuel cells oxygen reduction reaction (ORR) catalysts has been taken. Different catalysts with varying ratios of Fe and Co have been synthesized and characterized both physically and electrochemically in terms of activity, selectivity and stability with the addition of an accelerated stress test (AST). The catalysts show different electrochemical properties depending on the metal ratio such as a high electrochemical mass activity with increasing Fe ratio. Properties do not change linearly with the metal ratio, with a Fe/Co ratio of 5:3 showing a higher mass activity with simultaneous higher stability. Selectivity indicators plateau for catalysts with a Co content of 50% metal ratio and less, showing the same values as a monometallic Co catalyst. These findings indicate a deeper relationship between the ratio of different metals and physical and electrochemical properties in bimetallic Me-N-C catalysts.


2018 ◽  
Vol 28 (22) ◽  
pp. 1707551 ◽  
Author(s):  
Laura C. Pardo Pérez ◽  
Nastaran Ranjbar Sahraie ◽  
Julia Melke ◽  
Patrick Elsässer ◽  
Detre Teschner ◽  
...  

2018 ◽  
Vol 115 ◽  
pp. 226-237 ◽  
Author(s):  
Luigi Osmieri ◽  
Ricardo Escudero-Cid ◽  
Alessandro H.A. Monteverde Videla ◽  
Pilar Ocón ◽  
Stefania Specchia

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