| Tio2-x-modified ni nanocatalyst with tunable metal-support interaction for water-gas shift reaction | |
| Xu, Ming1; He, Shan1; Chen, Hao1; Cui, Guoqing1; Zheng, Lirong2; Wang, Bin3; Wei, Min1 | |
| 刊名 | Acs catalysis
 |
| 2017-11-01 | |
| 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 |
| 通讯作者 | He, shan(vh30@163.com) ; Wei, min(weimin@mail.buct.edu.cn) |
| 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 |
| WOS类目 | Chemistry, Physical |
| 语种 | 英语 |
| 出版者 | AMER CHEMICAL SOC |
| WOS记录号 | WOS:000414724700024 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2176868 |
| 专题 | 高能物理研究所 |
| 通讯作者 | He, Shan; Wei, Min |
| 作者单位 | 1.Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 3.Beijing Res Inst Chem Ind, Sinopec Grp, Beijing 100013, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Ming,He, Shan,Chen, Hao,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 | Xu, Ming.,He, Shan.,Chen, Hao.,Cui, Guoqing.,Zheng, Lirong.,...&Wei, Min.(2017).Tio2-x-modified ni nanocatalyst with tunable metal-support interaction for water-gas shift reaction.Acs catalysis,7(11),7600-7609. |
| MLA | Xu, Ming,et al."Tio2-x-modified ni nanocatalyst with tunable metal-support interaction for water-gas shift reaction".Acs catalysis 7.11(2017):7600-7609. |
| 个性服务 |
| 查看访问统计 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
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。
修改评论