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Zhejiang
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Shanghai Xinfan reports that Chinese scholars have developed ultra-thin platinum-nickel alloy high-efficiency nanocatalysts.
The new catalyst developed by Professor Zeng Jie from the National Laboratory of Hefei Microscale Material Science at the University of Science and Technology of China, in collaboration with Professor Peng Zhenmeng from the University of Akron, USA, shows a fivefold increase in activity compared to existing commercial catalysts. More importantly, it maintains stable performance even after 6,000 charge-discharge cycles, marking a significant breakthrough in fuel cell technology.
With global concerns over limited fossil fuels and rising environmental pollution, clean energy technologies like proton exchange membrane fuel cells (PEMFCs) have gained widespread attention. However, the widespread adoption of this technology has been hindered by the poor performance of cathode catalysts used in the oxygen reduction reaction (ORR). These catalysts often suffer from low activity and instability, which limit the power output and cycle life of the fuel cell, slowing down its commercialization.
To address these challenges, Zeng Jie’s team designed a novel core-shell nano-catalyst featuring an ultra-thin platinum-nickel alloy layer. The catalyst consists of a palladium core, known for its high stability but lower catalytic activity, surrounded by a platinum-nickel shell that exhibits excellent ORR performance. This unique structure maximizes the utilization of platinum atoms while exposing highly active crystal facets necessary for efficient oxygen reduction.
According to the research, the catalyst achieves an impressive activity of 0.79 kA per gram, nearly five times higher than that of conventional platinum-carbon catalysts. Moreover, the stable palladium core ensures long-term durability. After extensive testing involving 6,000 charge-discharge cycles, the catalyst showed no noticeable decline in performance. This groundbreaking development was recently published in the prestigious journal *ACS Nano*, highlighting its potential to revolutionize next-generation fuel cell systems.
Experts believe this innovation not only offers a more efficient and durable nano-catalyst but also opens up new pathways for improving the overall performance and cost-effectiveness of fuel cell technology. The findings could accelerate the transition toward cleaner, more sustainable energy solutions in the future. (Source: Guangming Daily, Chen Xuan, Yang Baoguo)