DICP OpenIR
学科主题物理化学
The reactivity of Pt-Ni bimetellic catalysts modulated by alternating H2-O2 program
Mu RT(慕仁涛); Fu Q(傅强); Guo XG(郭晓光); Tan DL(谭大力); Bao XH(包信和); XinheBao
会议文集Abstract Book
会议名称International Conference on Clean Energy Science 2011
会议日期2011-4-10
2011
会议地点大连
页码153-0
出版者待补充
出版地待补充
合作性质墙报
部门归属502组
主办者大连化物所
英文摘要Over Ni/Pt (111) model catalysts, the reversible changes of surface structures are observed under the alternating reductive and oxidative (redox) atmospheres at 800 K, where the Pt-skin surface and NiOX over-layers on Pt (111) surface forming in the redox program. Undergoing low temperature reduction (LTR), NiOX over-layers can be reduced to surface metallic Ni. Three configurable surfaces, Pt-skin surface with subsurface Ni (Pt/Ni/Pt(111)), NiOX over-layers on Pt (111) surface (NiOX/Pt(111)) and surface metallic Ni (Ni/Pt(111)) are modulated via high temperature reduction (HTR), high temperature oxidation (HTO) and LTR. This provides a potential way to prepare specific structure of supported Pt-Ni nanoparticles (NPs). The similar oscillation of surface and bulk structures of Pt0.5Ni0.5 NPs is confirmed by means of combined XPS, in-situ XRD and XAFS techniques during alternating redox program. Furthermore, CO oxidation reactivity of supported Pt0.5Ni0.5 catalysts is examined after the treatment of alternating redox program. Pt@NiO core-shell NPs formed after oxidation, performing low CO oxidation reactivity. While in the reductive treatment, Pt rich surface with the subsurface Ni was the thermodynamically stable structure, which had better catalytic reactivity and provided the opportunity to reversible fabricate Pt rich surface and Pt@NiO core-shell NPs during redox program. Consistent with the model systems, surface active Ni species on Pt NPs was produced at lower reductive temperature, which showing best reactivity.; Over Ni/Pt (111) model catalysts, the reversible changes of surface structures are observed under the alternating reductive and oxidative (redox) atmospheres at 800 K, where the Pt-skin surface and NiOX over-layers on Pt (111) surface forming in the redox program. Undergoing low temperature reduction (LTR), NiOX over-layers can be reduced to surface metallic Ni. Three configurable surfaces, Pt-skin surface with subsurface Ni (Pt/Ni/Pt(111)), NiOX over-layers on Pt (111) surface (NiOX/Pt(111)) and surface metallic Ni (Ni/Pt(111)) are modulated via high temperature reduction (HTR), high temperature oxidation (HTO) and LTR. This provides a potential way to prepare specific structure of supported Pt-Ni nanoparticles (NPs). The similar oscillation of surface and bulk structures of Pt0.5Ni0.5 NPs is confirmed by means of combined XPS, in-situ XRD and XAFS techniques during alternating redox program. Furthermore, CO oxidation reactivity of supported Pt0.5Ni0.5 catalysts is examined after the treatment of alternating redox program. Pt@NiO core-shell NPs formed after oxidation, performing low CO oxidation reactivity. While in the reductive treatment, Pt rich surface with the subsurface Ni was the thermodynamically stable structure, which had better catalytic reactivity and provided the opportunity to reversible fabricate Pt rich surface and Pt@NiO core-shell NPs during redox program. Consistent with the model systems, surface active Ni species on Pt NPs was produced at lower reductive temperature, which showing best reactivity.
文献类型会议论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/116122
专题中国科学院大连化学物理研究所
通讯作者XinheBao
推荐引用方式
GB/T 7714
Mu RT,Fu Q,Guo XG,et al. The reactivity of Pt-Ni bimetellic catalysts modulated by alternating H2-O2 program[C]. 待补充:待补充,2011:153-0.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[慕仁涛]的文章
[傅强]的文章
[郭晓光]的文章
百度学术
百度学术中相似的文章
[慕仁涛]的文章
[傅强]的文章
[郭晓光]的文章
必应学术
必应学术中相似的文章
[慕仁涛]的文章
[傅强]的文章
[郭晓光]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。