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  • 中国成功研制一种铂超细纳米线催化剂 直径仅1.3纳米
  • 本站编辑:xghl发布日期:2018-04-27 09:39 浏览次数:
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.
 
中国科大曾杰教授课题组与美国阿克伦大学彭振猛教授、中科院上海应用物理研究所司锐教授合作,在质子交换膜燃料电池阴极催化剂研制领域取得重要进展,设计出一种铂超细纳米线催化剂。
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.
 
研究结果表明,这种新型催化剂的质量活性和比活性分别达到了商用铂碳催化剂的7.8倍和5.4倍。
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.
 
该成果近日发表在《美国化学会志》杂志上。
The results were recently published in the Journal of American Chemistry Society.
 
当前公开资料显示,铂基催化剂虽然拥有卓越的质量活性,但是稳定性往往并不可观。针对这一难题,研究人员借助于原子级别精细合成技术,设计并合成出了一种铑原子掺杂的铂超细纳米线催化剂,其直径仅有1.3纳米,铂原子的利用率却高达48.6%。
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%.
 
研究结果表明,该催化剂在氧气气氛下循环使用10000次后,只损失了9.2%的质量活性。据悉,目前商用的铂碳催化剂在这一条件下,质量活性性能损失达到72.3%。
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.
 
据介绍,这种催化剂在燃料电池阴极氧还原反应中表现“上佳”,可大幅节省贵金属铂的用量,对推动清洁能源转换技术的商业化应用进程有着积极意义。
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.