Efficient base-free direct oxidation of glucose to gluconic acid over TiO2-supported gold clusters

doi:10.1039/c8nr08143c

	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.
资助项目	National Natural Science Foundations of China[21606223] ; Shanxi Province Hundred Talent Project
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
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000460162900053
资助机构	National Natural Science Foundations of China ; National Natural Science Foundations of China ; Shanxi Province Hundred Talent Project ; Shanxi Province Hundred Talent Project ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; Shanxi Province Hundred Talent Project ; Shanxi Province Hundred Talent Project ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; Shanxi Province Hundred Talent Project ; Shanxi Province Hundred Talent Project ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; Shanxi Province Hundred Talent Project ; Shanxi Province Hundred Talent Project
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/165786]
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
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.