Abstract
In order to fill the research gap of high metal loading of high performance PtNi alloy catalysts, a PtNi/C alloy nano-catalyst with metal loading more than 50 wt.% and core-shell like structure was prepared by ethylene glycol reduction, high temperature annealing, and acid pickling. The electrochemical test results showed that the prepared PtNi alloy catalyst had excellent electrochemical activity: the electrochemical surface area (ECSA) was 63.8 m2·gPt−1, and the mass activity (MA) was 0.574 A·mgPt−1, which is 2.73 times greater than those of the Pt/C JM (Johnson Matthey) catalyst. The durability of the PtNi/C catalyst was further investigated. After 30 K cycles of accelerated durability test, the ECSA and MA of the PtNi/C alloy catalyst decreased by 10.2% and 31.2%, respectively. The PtNi/C alloy catalyst prepared in this study has excellent catalytic activity and overcomes the problem of insufficient durability of traditional alloy catalysts and has the potential for large-scale commercial application.
Highlights
Since the development of modern civilization, the consumption and demand of all kinds of energy are increasing
Fuel cells are a kind of high-efficiency power generation device that directly convert the chemical energy stored in the fuel into electrical energy that can be used directly through electrochemical reaction without the transformation of other energy
Proton exchange membrane fuel cells (PEMFCs) can convert the chemical energy of hydrogen fuel directly into electricity that is easy to use, and they have the characteristics of high energy conversion efficiency, abundant fuel sources, and no pollution
Summary
Since the development of modern civilization, the consumption and demand of all kinds of energy are increasing. As a new type of energy that has attracted much attention in recent years, has the advantages of clean, efficient, and sustainable development, and is expected to become the ultimate energy source of society. Fuel cells are a kind of high-efficiency power generation device that directly convert the chemical energy stored in the fuel into electrical energy that can be used directly through electrochemical reaction without the transformation of other energy (thermal energy, mechanical energy, etc.). Proton exchange membrane fuel cells (PEMFCs) are one of the important ways to convert hydrogen energy. PEMFCs can convert the chemical energy of hydrogen fuel directly into electricity that is easy to use, and they have the characteristics of high energy conversion efficiency, abundant fuel sources, and no pollution. PEMFCs have a good possibility of replacing internal combustion engines as a green vehicle power supply [1,2]
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