中新社合肥7月5日电 (吴兰 张致远)直径仅有1.3纳米，利用率却高达48.6%。记者5日从中国科学技术大学(简称中国科大)获悉，该校科研人员研制一种铂超细纳米线催化剂。据科研人员黄宏文介绍，该催化剂在电池中的应用，可使电池有很高的能量转换效率和低污染排放的特点。
China News Agency, Hefei, July, 5 (Wu Lan Zhang Zhiyuan) has a diameter of only 1.3 nanometers, but its utilization rate is as high as 48.6%. 5, reporters learned from University of Science & Technology China (China University of science and Technology), the School researchers developed a platinum superfine nanowire catalyst. According to researcher Huang Hongwen, the application of the catalyst in the battery can make the battery have the characteristics of high energy conversion efficiency and low pollution emission.
In cooperation with Professor Peng Zhenmeng of University of Akron, Professor Peng Zhenmeng of the Institute of Applied Physics of the Chinese Academy of Sciences, Professor Zeng Zeng, China, has made important progress in the development of the cathode catalyst for proton exchange membrane fuel cells, and designed a platinum superfine nanowire catalyst.
The results showed that the mass activity and specific activity of the new catalyst reached 7.8 times and 5.4 times that of commercial platinum carbon catalyst respectively.
The results were recently published in the Journal of American Chemistry Society.
Publicly available data show that although platinum based catalysts possess excellent quality activity, their stability is often not substantial. In order to solve this problem, researchers have designed and synthesized a rhodium doped platinum superfine nanowire catalyst with the aid of atomic level fine synthesis technology. The diameter of the catalyst is only 1.3 nanometers, and the utilization rate of platinum atoms is up to 48.6%.
The results showed that the catalyst lost only 9.2% of its mass activity after 10000 cycles in oxygen atmosphere. It is reported that the commercial platinum carbon catalyst has lost 72.3% of its mass activity under this condition.
It is introduced that the catalyst is "better" in the cathode oxygen reduction reaction of fuel cells, which can greatly save the amount of precious metal platinum. It is of great significance to the commercialized application process of the clean energy conversion technology.