The reactivity of PtNi bimetallic catalyst: from model systems to supported catalysts
文献类型：会议论文
| 作者 | Mu RT(慕仁涛) ; Fu Q(傅强) ; Zhang H(张辉) ; Wang CF(王传付) ; Xu H(徐红) ; Zhai RS(翟润生) ; Tan DL(谭大力) ; Bao XH(包信和) |
| 出版日期 | 2010-08-23 |
| 会议名称 | 18th international vacuum congress |
| 会议日期 | 2010-8-23 |
| 会议地点 | 中国 |
| 页码 | -/2 |
| 通讯作者 | 包信和 |
| 中文摘要 | various ni-pt(111) model surfaces were constructed in a well-defined way by using molecular beam epitaxy (mbe), which include metallic ni on pt(111) - ni/pt(111), ni oxide nanoislands on pt(111) - nio1-x/pt (111), pt-skin surface with subsurface ni - pt/ni/pt(111), and sandwich-like nio1-x/pt/ni/pt (111) surface consisting of surface ni oxide nanoislands and subsurface ni at pt(111). in-situ ultraviolet photoelectron spectroscopy (ups) investigations show that the sandwich-like nio1-x/pt/ni/pt (111) surface presents the highest reactivity to co oxidation, in which surface ni oxide nanoislands activate o2 dissociative adsorption and subsurface ni species promote co oxidation with o. the similar sandwich-like surface structure was obtained in pt-ni nanoparticles supported on carbon black (cb) and highly orientated pyrolyitc graphite (hopg) surfaces. by reducing the pt-ni catalysts at intermediate temperature, such as 523 k, part of ni diffuses into the subsurface region and the left remains on the surface, which transforms to the sandwich-like pt-ni nanoparticles, nio1-x/pt/ni/pt, in the oxidative atmosphere. the catalytic test for co oxidation in o2 shows that the performance of this catalyst is better than those reduced at lower or higher temperatures. the structure-activity relationship found in the real catalyst systems is consistent with the surface science data using the model systems. |
| 会议主办者 | 中国真空学会 |
| 学科主题 | 物理化学 |
| 语种 | 中文 |
| 源URL | [http://159.226.238.44/handle/321008/114308]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 推荐引用方式 GB/T 7714 | Mu RT,Fu Q,Zhang H,et al. The reactivity of PtNi bimetallic catalyst: from model systems to supported catalysts[C]. 见:18th international vacuum congress. 中国. 2010-8-23. |
入库方式： OAI收割
来源：大连化学物理研究所
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