TiO2–x-Modified Ni Nanocatalyst with Tunable Metal–Support Interaction for Water–Gas Shift Reaction
文献类型：期刊论文
| 作者 | B. Wang; L. Zheng; G. Cui; H. Chen; S. He; Xu, M.; Zheng LR(郑黎荣) ; M. Wei
|
| 刊名 | ACS CATALYSIS
 |
| 出版日期 | 2017 |
| 卷号 | 7期号:11页码:7600-7609 |
| 关键词 | layered double hydroxide strong metal-support interaction water-gas shift reaction interface structure structure-activity correlation |
| ISSN号 | 2155-5435 |
| DOI | 10.1021/acscatal.7b01951 |
| 文献子类 | Article |
| 英文摘要 | The modulation of strong metal-support interaction (SMSI) plays a key role and remains a challenge in achieving the desired catalytic performance in many important chemical reactions. Herein, we report a TiO2-x-modified Ni nanocatalyst with tunable Ni-TiO2-x interaction via a two-step procedure: preparation of Ni/Ti mixed metal oxide (NiTi-MMO) from NiTi-layered double hydroxide (NiTi-LDH) precursor, followed by a further reduction treatment at different temperatures. A combination study (XRD, TEM, H2-TPR, XPS, and in situ EXAFS) verifies that a high reduction temperature enhances the Ni-TiO2-x interaction, which results in an increased coverage degree of Ni nanoparticles by TiO2-x as well as electron density of interfacial Ni (Nis-). Moreover, the creation of a Ni delta-,-O-v-Ti3+ interface site (O-nu denotes oxygen vacancy) induced by strong Ni-TiO2-x interaction serves as dual-active site to efficiently catalyze the water-gas shift reaction (WGSR). The optimized catalyst (Ni@TiO2-x(450)) via tuning Ni-TiO2-x interaction gives a TOF value of 3.8 s(-1) which is similar to 7 times larger than the conventional 15%Ni/TiO2(450) catalyst. Such a high catalytic efficiency is attributed to the interfacial site (Ni delta-,O-nu-Ti3+) with medium strength of metal-support interaction, as revealed by in situ diffuse reflectance Fourier transform infrared spectroscopy (in situ DRIFTS), which promotes the synergic catalysis between Ni delta- and oxygen vacancy toward WGSR. |
| WOS关键词 | METHANE SUPPRESSION ; GOLD NANOPARTICLES ; AU NANOPARTICLES ; CO ADSORPTION ; IN-SITU ; CATALYSTS ; TIO2 ; HYDROGENATION ; OXIDATION ; XANES |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000414724700024 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/285358]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | B. Wang,L. Zheng,G. Cui,et al. TiO2–x-Modified Ni Nanocatalyst with Tunable Metal–Support Interaction for Water–Gas Shift Reaction[J]. ACS CATALYSIS,2017,7(11):7600-7609. |
| APA | B. Wang.,L. Zheng.,G. Cui.,H. Chen.,S. He.,...&M. Wei.(2017).TiO2–x-Modified Ni Nanocatalyst with Tunable Metal–Support Interaction for Water–Gas Shift Reaction.ACS CATALYSIS,7(11),7600-7609. |
| MLA | B. Wang,et al."TiO2–x-Modified Ni Nanocatalyst with Tunable Metal–Support Interaction for Water–Gas Shift Reaction".ACS CATALYSIS 7.11(2017):7600-7609. |
入库方式： OAI收割
来源：高能物理研究所
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