|
|||||
|
|
Direct room-temperature synthesis of a highly dispersed Pd nanoparticle catalyst and its electrical properties in a fuel cell |
|
| Authors: | Takashi Ogi Ryuichi Honda Koshiroh Tamaoki Norizoh Saitoh Yasuhiro Konishi |
| Affiliation: | Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Osaka 599-8531, Japan;Department of Chemistry, College of Science, Yeungnam University, Gyeongsan, Gyeongbuk 712-749, South Korea;School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, PR China;Department of Chemistry and Chemical Engineering, Inha University, Incheon 402-751, South Korea;Graduate School of Advanced Science and Engineering, Hiroshima University 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan;Nanoscience and Nanotechnology Research Center, Research Organization for the 21st Century, Osaka Prefecture University, Gakuencho 1–2, Nakaku, Sakai, Osaka 599-8570, Japan;Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, PR China |
| Abstract: | Highly dispersed palladium nanoparticles supported on bacterial cells were successfully prepared by a microbial method using the metal ion-reducing bacterium Shewanella oneidensis. Resting cells of S. oneidensis reduced soluble palladium(II) to insoluble palladium(0) at room temperature and neutral pH within 60 min when formate was provided as the electron donor. Transmission electron microscopy analysis of a thin section of S. oneidensis cells after exposure to a PdCl2 solution revealed that palladium particles approximately 5–10 nm in size were deposited on the bacterial surface and in the periplasmic space. The initial concentrations of soluble palladium(II) and formate in the precursor solution strongly influenced the rate of palladium(II) reduction and the dispersity of biomass-supported palladium particles. The dried biomass-supported palladium was tested as an anode catalyst in a polymer electric membrane fuel cell for power production. The maximum power generation of the highly dispersed biomass-supported palladium particles was comparable to that of a commercial palladium catalyst. |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ | |