期刊
ACS CATALYSIS
卷 6, 期 5, 页码 3128-3135出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.6b00715
关键词
Ru-Ni alloy; titania; dehydrogenation; ammonia-borane; hydrogen
资金
- Japan Society for the Promotion of Science (JSPS) [26220911, 25289289, 26630409, 26620194]
- Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT)
- MEXT program Elements Strategy Initiative to Form Core Research Center
- Grants-in-Aid for Scientific Research [16K14478, 26220911] Funding Source: KAKEN
Highly dispersed monometallic Ru nanoparticles can be successfully synthesized on TiO2 supports for effective hydrogen production from ammonia-borane (NH3 center dot BH3; AB). The choice of support material and reduction methods were confirmed to significantly influence the size of the Ru nanoparticles, and smaller sizes of Ru nanoparticles with a mean diameter of 1.7 nm could be formed on a TiO2 support material by H-2 reduction at 200 degrees C. The catalytic activity of the Ru nanoparticles can be significantly enhanced by alloying with Ni atoms, whereby a significantly high total turnover number (TTO) of approximately 153000 over 8 h was achieved with an excellent turnover frequency (TOF) of 914 min(-1) and an activation energy of 28.1 kJ mol(-1). Detailed characterization by means of TEM, EDX, H-2-TPR, and in situ XAFS measurements revealed that a synergistic alloying effect originates from the random distribution of Ru-Ni nanoparticles with a mean diameter of 2.3 nm and plays a crucial role in the exceptional catalytic performance. This catalytic system has particular potential for industrial application in fuel cells due to advantages such as the facile preparation method, the use of relatively cheap metals, and the exceptionally high catalytic activity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据