| Efficient base-free direct oxidation of glucose to gluconic acid over tio2-supported gold clusters | |
| Guo, Song; Fang, Qihua; Li, Zhimin; Zhang, Jia; Zhang, Junying; Li, Gao | |
| 刊名 | Nanoscale
 |
| 2019-01-21 | |
| 卷号 | 11期号:3页码:1326-1334 |
| ISSN号 | 2040-3364 |
| DOI | 10.1039/c8nr08143c |
| 通讯作者 | Li, gao(gaoli@dicp.ac.cn) |
| 英文摘要 | The transformation of renewable natural resources is an appealing and sustainable protocol to minimize fossil fuel consumption. here, a simple incipient wetness protocol is developed to prepare ultrasmall gold clusters, immobilized on tio2 (particle size: 1.2-1.7 nm), using anthranilic acid as a stabilizing agent. the au clusters can be reduced to metallic au-0 (au/th-150 and au/th-200) during 150 and 200 degrees c annealing in the presence of h-2 gas, while the au clusters are converted to au+ species in air at 200 and 500 degrees c (au/ta-200 and au/ta-500), a conclusion supported by xps and low-temperature (-150 degrees c) operando-drifts analysis. au/ta-200 and au/ta-500 showed inactivity in the base-free direct oxidation of glucose. for comparison, au/th-150 and au/th-200 exhibited salient catalytic performance (87-92% conversion and 95-97% selectivity for gluconic acid), revealing that glucose oxidation occurs preferentially on the au-0 species. the turnover frequency (tof) of au/th-150 reaches 1908 mol(reacted glucose) mol(au)(-1) h(-1), which is much higher than that of commercial pd-bi/c under alkaline conditions (tof: 1298 mol(reacted glucose) mol(pd)(-1) h(-1), ph 9.5). the apparent activation energies are 37 (over au/th-150) and 47 kj mol(-1) (au/th-200), comparable to the unsupported au colloids, indicating that the oxidation should occur at the au surface rather than at the perimeter interface between the au clusters and the supports. |
| WOS关键词 | LONG-TERM STABILITY ; SELECTIVE OXIDATION ; AEROBIC OXIDATION ; CO OXIDATION ; CATALYTIC-ACTIVITY ; BISMUTH ; NANOPARTICLES ; ACTIVATION ; CONVERSION ; CHEMISTRY |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| WOS类目 | Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied |
| 语种 | 英语 |
| 出版者 | ROYAL SOC CHEMISTRY |
| WOS记录号 | WOS:000460162900053 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2372665 |
| 专题 | 大连化学物理研究所 |
| 通讯作者 | Li, Gao |
| 作者单位 | Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Gold Catalysis Res Ctr, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Song,Fang, Qihua,Li, Zhimin,et al. Efficient base-free direct oxidation of glucose to gluconic acid over tio2-supported gold clusters[J]. Nanoscale,2019,11(3):1326-1334. |
| APA | Guo, Song,Fang, Qihua,Li, Zhimin,Zhang, Jia,Zhang, Junying,&Li, Gao.(2019).Efficient base-free direct oxidation of glucose to gluconic acid over tio2-supported gold clusters.Nanoscale,11(3),1326-1334. |
| MLA | Guo, Song,et al."Efficient base-free direct oxidation of glucose to gluconic acid over tio2-supported gold clusters".Nanoscale 11.3(2019):1326-1334. |
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