Circumventing Metal Dissolution Induced Degradation of Pt-Alloy Catalysts in Proton Exchange Membrane Fuel Cells: Revealing the Asymmetric Volcano Nature of Redox Catalysis

ACS Catalysis ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 928-938 ◽  
Author(s):  
Qingying Jia ◽  
Jingkun Li ◽  
Keegan Caldwell ◽  
David E. Ramaker ◽  
Joseph M. Ziegelbauer ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Redox Catalysis ◽  
Metal Dissolution ◽  
Pt Alloy Catalysts ◽  
Pt Alloy ◽  
Exchange Membrane ◽  
Alloy Catalysts

scholarly journals Design of ternary Pt-CoZn alloy catalysts coated with N-doped carbon towards acidic oxygen reduction

2021 ◽  
Author(s):  
Xieweiyi Ye ◽  
Yakun Xue ◽  
Kaijia Li ◽  
Wen Tang ◽  
Xiao Han ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Proton Exchange Membrane ◽  
Reduction Reaction ◽  
Proton Exchange ◽  
Commercial Applications ◽  
Exchange Membrane ◽  
Alloy Catalysts

Improving the activity and durability of Pt-based electrocatalysts used in the acidic oxygen reduction reaction (ORR) is a great task for the commercial applications of proton-exchange membrane fuel cells. Alloying...

scholarly journals Enhanced oxygen reduction activity with rare earth metal alloy catalysts in proton exchange membrane fuel cells

2021 ◽  
pp. 138454
Author(s):  
Björn Eriksson ◽  
Gerard Montserrat-Sisó ◽  
Rosemary Brown ◽  
Tomáš Skála ◽  
Rakel Wreland Lindström ◽  
...  
Keyword(s):  
Rare Earth ◽  
Fuel Cells ◽  
Oxygen Reduction ◽  
Rare Earth Metal ◽  
Proton Exchange Membrane ◽  
Earth Metal ◽  
Proton Exchange ◽  
Reduction Activity ◽  
Exchange Membrane ◽  
Alloy Catalysts

Pt Alloy Electrocatalysts for Proton Exchange Membrane Fuel Cells: A Review

2013 ◽  
Vol 55 (3) ◽  
pp. 255-288 ◽  
Author(s):  
Zhiming Liu ◽  
Lingling Ma ◽  
Jack Zhang ◽  
Kitiya Hongsirikarn ◽  
James G. Goodwin
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Pt Alloy ◽  
Exchange Membrane

Octahedral Pt-Pd alloy catalysts with enhanced oxygen reduction activity and stability in proton exchange membrane fuel cells

RSC Advances ◽  
2012 ◽  
Vol 2 (3) ◽  
pp. 1119-1125 ◽  
Author(s):  
Young-Woo Lee ◽  
A-Ra Ko ◽  
Do-Young Kim ◽  
Sang-Beom Han ◽  
Kyung-Won Park
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Reduction Activity ◽  
Pd Alloy ◽  
Exchange Membrane ◽  
Alloy Catalysts

Highly proton conductive membranes based on carboxylated cellulose nanofibres and their performance in proton exchange membrane fuel cells

2019 ◽  
Author(s):  
Valentina Guccini ◽  
Annika Carlson ◽  
Shun Yu ◽  
Göran Lindbergh ◽  
Rakel Wreland Lindström ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Surface Charge ◽  
Proton Exchange Membrane ◽  
Membrane Surface ◽  
Proton Exchange ◽  
Membrane Thickness ◽  
Fuel Cell Performance ◽  
Cellulose Nanofibres ◽  
Exchange Membrane

The performance of thin carboxylated cellulose nanofiber-based (CNF) membranes as proton exchange membranes in fuel cells has been measured in-situ as a function of CNF surface charge density (600 and 1550 µmol g<sup>-1</sup>), counterion (H<sup>+</sup>or Na<sup>+</sup>), membrane thickness and fuel cell relative humidity (RH 55 to 95 %). The structural evolution of the membranes as a function of RH as measured by Small Angle X-ray scattering shows that water channels are formed only above 75 % RH. The amount of absorbed water was shown to depend on the membrane surface charge and counter ions (Na<sup>+</sup>or H<sup>+</sup>). The high affinity of CNF for water and the high aspect ratio of the nanofibers, together with a well-defined and homogenous membrane structure, ensures a proton conductivity exceeding 1 mS cm<sup>-1</sup>at 30 °C between 65 and 95 % RH. This is two orders of magnitude larger than previously reported values for cellulose materials and only one order of magnitude lower than Nafion 212. Moreover, the CNF membranes are characterized by a lower hydrogen crossover than Nafion, despite being ≈ 30 % thinner. Thanks to their environmental compatibility and promising fuel cell performance the CNF membranes should be considered for new generation proton exchange membrane fuel cells.<br>

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