Enhanced PEMFC durability with graphitized carbon black cathode catalyst supports under accelerated stress testing

Abstract

The enhanced anti-corrosion properties of graphitized carbon substrates are evaluated via accelerated stress tests (ASTs). The graphitized surface properties of carbon are responsible for alleviating the coarsening and agglomeration of Pt particles.

Platinum–tin as a superior catalyst for proton exchange membrane fuel cells

“…73 The results reported here are thus superior to earlier reports in the literature. 35,73 A performance degradation of 50 mV for PtSn/VC(3) after 60 000 cycles is remarkable as a maximum degradation of 30 mV is the target set by the US Department of Energy after 30 000 cycles. 32…”

“…73 The results reported here are thus superior to earlier reports in the literature. 35,73 A performance degradation of 50 mV for PtSn/VC(3) after 60,000 cycles is remarkable as a maximum degradation of 30 mV is the target set by the US Department of Energy after 30,000 cycles. 32 It is thus apparent that alloying Pt with Sn leads to superior electrocatalytic activity for the electrooxidation of molecular hydrogen and the electroreduction of molecular oxygen at the anode and cathode of the fuel cell, respectively.…”

“…35 A higher performance degradation of 12% (at 100 mA cm −2 aer 10 000 cycles 35 and 20% (at 220 mA cm −2 was also reported aer 1000 cycles for Pt/C in conventional PEMFCs. 73 The results reported here are thus superior to earlier reports in the literature. 35,73 A performance degradation of 50 mV for PtSn/VC(3) aer 60 000 cycles is remarkable as a maximum degradation of 30 mV is the target set by the US Department of Energy aer 30 000 cycles.…”

Pt-Based Oxygen Reduction Reaction Catalysts in Proton Exchange Membrane Fuel Cells: Controllable Preparation and Structural Design of Catalytic Layer

“…At present, carbon black materials (such as Ketjen Black and Vulcan XC-72, etc.) have been widely used as PEMFC catalyst supports due to their advantages of high conductivity, high active area, porous structure, good stability in acidic and alkaline media, and relatively low price [ 49 , 108 , 129 ]. However, in the case of PEMFCs running for a long time, the charcoal supports easily form oxygen-containing groups on the catalyst support surface, which will reduce the conductivity of the catalyst and lead to serious sintering of catalyst NPs.…”

A High-Durability Graphitic Black Pearl Supported Pt Catalyst for a Proton Exchange Membrane Fuel Cell Stack

“…The carbon support treated at 1600 • C showed the highest durability, indicating that the graphitization degree of support is the key factor for development of a high durability catalyst. Xue [44] et al compared the ORR activity of Ketjenblack EC-600 as catalyst support with original EC-600 as catalyst and JM60% catalyst after high temperature heat treatment at 1600 • C and 1800 • C. The results showed that the initial particle size of the prepared catalyst ranged from 2.80 to 3.09 nm. After start-stop protocol testing, the particle size of Pt/EC-600 increased from 2.80 to 5.31 nm, and the particle size of Pt/EC-G1800 had the minimum increase in particle size, from 2.99-3.65 nm.…”