Catalytic Activity of Atomic Gold-Decorated Polyaniline Support in Glucose Oxidation

Atomic-level gold clusters are decorated on a polyaniline (PANI) support by a cyclic atomic electrodeposition process, and the catalytic activity in the oxidation of glucose is studied. The evaluation is conducted by cyclic voltammetry using atomic-level gold clusters-decorated PANI (PANI/AuN, where N indicates the atomic size of the Au cluster and N = 1~3 in this study) as the working electrode and a solution containing 0 to 50.0 mM of glucose in phosphate-buffered saline. The catalytic activity is determined from the oxidation current observed at around +0.6 V vs. Ag/AgCl. The catalytic activity is found to be affected by the size of gold clusters decorated on the PANI/AuN, whereby the catalytic activity is low when N is 1 or 3. On the other hand, an obvious enhancement in the catalytic activity is observed for the PANI/Au2 electrode.

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Catalytic activity of gold nanoparticles deposited on N-doped carbon-based supports in oxidation of glucose and arabinose mixtures

Research on Chemical Intermediates ◽

10.1007/s11164-021-04426-6 ◽

2021 ◽

Author(s):

Sebastian Franz ◽

Nataliya D. Shcherban ◽

Igor Bezverkhyy ◽

Sergii A. Sergiienko ◽

Irina L. Simakova ◽

...

Keyword(s):

Gold Nanoparticles ◽

Catalytic Activity ◽

Glucose Oxidation ◽

Glucuronic Acid ◽

Carbon Surface ◽

Carbon Supports ◽

Constant Ph ◽

Oxidation Of Glucose ◽

Mesoporous Structures ◽

Carbon Based

AbstractOxidation of a mixture of glucose and arabinose over Au particles deposited on porous carbons, N-doped carbons and carbon nitrides was investigated at 70 °C, under constant pH of 8, and oxygen partial pressure 0.125 atm. In particular, Au deposited on nitrogen-containing carbon-based mesoporous structures demonstrated activity in the oxidation of the sugars to the corresponding aldonic acids higher than gold deposited on undoped carbon supports (conversion of glucose up to ca. 60%, arabinose–ca. 30% after 200 min). The results can be explained by the basic nature of the supports leading to an increase in the polarity of the carbon surface and the oxygen activation. Glucuronic acid (with selectivity ca. 10–93.5%) together with gluconic acid was formed as a result of glucose oxidation, while arabinose was selectively oxidized to arabinonic acid.

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Influence of the Support and the Size of Gold Clusters on Catalytic Activity for Glucose Oxidation

Angewandte Chemie International Edition ◽

10.1002/anie.200802845 ◽

2008 ◽

Vol 47 (48) ◽

pp. 9265-9268 ◽

Cited By ~ 211

Author(s):

Tamao Ishida ◽

Naoto Kinoshita ◽

Hiroko Okatsu ◽

Tomoki Akita ◽

Takashi Takei ◽

...

Keyword(s):

Catalytic Activity ◽

Glucose Oxidation ◽

Gold Clusters

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Influence of Reductants on the Catalytic Properties of Nano-Gold Supported on Mesoporous SBA-15 for Glucose Oxidation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.550-553.220 ◽

2012 ◽

Vol 550-553 ◽

pp. 220-224

Author(s):

Chao Xian Wang ◽

Yong Xiu Li ◽

Hui Liu ◽

Long Wei Ye ◽

Chang Yong Sun ◽

...

Keyword(s):

Particle Size ◽

Catalytic Activity ◽

Glucose Oxidation ◽

Au Nanoparticles ◽

Catalytic Properties ◽

Aerobic Oxidation ◽

Au Nps ◽

Nano Gold ◽

Sem And Tem ◽

Oxidation Of Glucose

Impregnation and deposition-precipitation (DP) methods were employed for the preparation of Au nanoparticles supported on SBA-15, and the influences of various reductants were systematically surveyed. The dispersion and particle size of gold loaded on SBA-15 were determined by XRD, SEM and TEM. It has been found that reductants have effect on the size and dispersion of Au NPs, resulting in different catalytic properties for aerobic oxidation of glucose. The Au NPs on SBA-15 using KBH4as reductant was approximately 5-6 nm, which exhibited excellent catalytic activity.

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Investigation of glucose electro-oxidation on Co and CoB alloy coatings modified with Au nanoparticles

Chemija ◽

10.6001/chemija.v30i1.3922 ◽

2019 ◽

Vol 30 (1) ◽

Author(s):

Daina Upskuvienė ◽

Zita Sukackienė ◽

Aldona Balčiūnaitė ◽

Virginija Kepenienė ◽

Dijana Šimkūnaitė ◽

...

Keyword(s):

Glucose Oxidation ◽

Au Nanoparticles ◽

Copper Substrate ◽

Oxidation Current ◽

Density Values ◽

Cyclic Voltammetry Method ◽

Cu Catalysts ◽

Electro Oxidation ◽

Oxidation Of Glucose ◽

Alloy Catalysts

The electrochemical oxidation of glucose was investigated on the Co and CoB alloy coatings, which were deposited on the copper substrate (Cu) and subsequently modified with a small amount of Au nanocrystallites. The catalysts were prepared via a simple electroless Co deposition method followed by a spontaneous Au galvanic displacement from the Au(III)-containing solution. The activity of Co and CoB alloy coatings modified with Au crystallites towards the oxidation of glucose was examined by the cyclic voltammetry method. It has been determined that the Co and CoB alloy coatings, which were modified with a small amount of Au crystallites, exhibit a significantly higher activity for the oxidation of glucose as compared to that of bare Au, Co and CoB alloy catalysts. The process of glucose oxidation is significantly shifted to a more negative potential domain at the both Co/Cu and CoB/Cu catalysts modified by Au nanocrystallites, indicating the higher activity of those catalysts as compared to that of the unmodified Co/Cu and CoB/Cu catalysts and the bare Au electrode. It was found that ca. 22 and even 67 times higher glucose oxidation current density values have been obtained at the AuCo/Cu and AuCoB/Cu catalysts, respectively, as compared to those for the unmodified CoB/ Cu and Co/Cu.

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Influence of the Support and the Size of Gold Clusters on Catalytic Activity for Glucose Oxidation

Angewandte Chemie ◽

10.1002/ange.200802845 ◽

2008 ◽

Vol 120 (48) ◽

pp. 9405-9408 ◽

Cited By ~ 48

Author(s):

Tamao Ishida ◽

Naoto Kinoshita ◽

Hiroko Okatsu ◽

Tomoki Akita ◽

Takashi Takei ◽

...

Keyword(s):

Catalytic Activity ◽

Glucose Oxidation ◽

Gold Clusters

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Glucose utilization by sheep embryos derived in vivo and in vitro

Reproduction Fertility and Development ◽

10.1071/rd9910571 ◽

1991 ◽

Vol 3 (5) ◽

pp. 571 ◽

Cited By ~ 42

Author(s):

JG Thompson ◽

AC Simpson ◽

PA Pugh ◽

RW Wright ◽

HR Tervit

Keyword(s):

Glucose Oxidation ◽

Glucose Utilization ◽

Tricarboxylic Acid Cycle ◽

Tricarboxylic Acid ◽

Cell Stage ◽

Glycolytic Activity ◽

Total Utilization ◽

Oxidation Of Glucose

Embryos were collected from superovulated donors at various intervals from onset of oestrus, ranging from Day 1.5 to Day 6. In addition, blastocysts obtained from the culture of 1-cell embryos collected in vivo or of oocytes matured and fertilized in vitro were used to assess the effects of in vitro manipulation and culture on glucose utilization. Glycolytic activity was determined by the conversion of [5-3H]glucose to 3H2O, and oxidation of glucose was determined by the conversion of [U-14C]glucose to 14CO2. Glucose utilization increases significantly from the 8-cell stage and during compaction and blastulation. Glucose oxidation was at a relatively low level (5-12% of total utilization) compared with glycolysis. No difference was observed between the glycolytic activity of blastocysts derived from in vivo or in vitro sources. However, glucose oxidation was lower (P less than 0.05) in blastocysts derived from the culture of 1-cell embryos or from oocytes matured and fertilized in vitro. Exogenous tricarboxylic acid cycle substrates (i.e. pyruvate and lactate supplied in the medium) affected the level of glucose oxidation.

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STEADY STATE OXIDATION OF GLUCOSE IN THE HYPOTHYROID DIABETIC RAT: A ROLE FOR THE ADRENAL CORTEX IN GLUCOSE OXIDATION

Canadian Journal of Biochemistry and Physiology ◽

10.1139/o63-145 ◽

1963 ◽

Vol 41 (5) ◽

pp. 1293-1305

Author(s):

Dorothy S. Dow ◽

C. E. Allen

Keyword(s):

Steady State ◽

Glucose Oxidation ◽

Tricarboxylic Acid Cycle ◽

Critical Factor ◽

Inhibitory Effect ◽

Reduced Form ◽

Diabetic Rat ◽

Hexose Monophosphate ◽

Hexose Monophosphate Pathway ◽

Oxidation Of Glucose

A steady state between the specific activities of blood glucose and expired CO2in the hypothyroid diabetic rat was maintained for extended periods of time following a single intraperitoneal injection of glucose-1-C14or glucose-6-C14. Rates of oxidation of the labelled sugars were measured during the steady state.Glucose oxidation by way of glycolysis and the tricarboxylic acid cycle in the hypothyroid diabetic rat paralleled the decrease in expired CO2but glucose oxidation by way of the hexose monophosphate pathway was completely suppressed.It is suggested that the observed inhibitory effect on the hexose monophosphate pathway is due to the maintenance of diphosphopyridine nucleotide in the reduced form as the result of goitrogen inhibition of steroid-catalyzed transhydrogenation.The results suggest that steroid concentration may be a critical factor in regulation of glucose oxidation by way of the hexose monophosphate pathway.

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Oxidation of glucose carbon entering the TCA cycle is reduced by glutamine in small intestine epithelial cells

AJP Gastrointestinal and Liver Physiology ◽

10.1152/ajpgi.1995.268.6.g879 ◽

1995 ◽

Vol 268 (6) ◽

pp. G879-G888 ◽

Cited By ~ 4

Author(s):

C. E. Kight ◽

S. E. Fleming

Keyword(s):

Small Intestine ◽

Epithelial Cells ◽

Glucose Oxidation ◽

Tca Cycle ◽

Proximal Segment ◽

Distal Small Intestine ◽

Glucose Carbon ◽

The Tca Cycle ◽

Oxidation Of Glucose ◽

In Cells

The influence of glutamine on glucose oxidation was assessed in epithelial cells isolated from the mucosa of the proximal, mid-, and distal small intestine of young, fed, male rats. Glucose oxidation declined along the length of the small intestine, with values from the mid- and distal segments representing approximately 55% and 40%, respectively, of the value from the proximal segment. A gradient along the small intestine was noted also in the influence of glutamine on glucose oxidation: glutamine suppressed glucose oxidation approximately 60% in the proximal small intestine, 39% in the mid-intestine, and 31% in the distal small intestine. Glutamine suppressed the oxidation of glucose carbon that entered the tricarboxylic acid (TCA) cycle; this was determined using CO2 ratios derived from acetate and glucose isotopes. In cells from the proximal segment, the probability that carbon entering the cycle would complete one full turn was reduced by glutamine from 0.77 to 0.28. The entry of glucose-derived pyruvate into the TCA cycle did not appear to be influenced by the presence of glutamine, however. Glutamine had no influence on the proportion of glucose metabolism that occurred via the pentose phosphate pathway (which averaged 5% or less), but reduced flux of carbon through pyruvate carboxylase relative to flux through pyruvate dehydrogenase from 40% to 9% in cells from the proximal segment. These data suggest that, in the presence of glutamine, the fate of pyruvate carbon (derived from glucose or elsewhere) entering the TCA cycle is altered from that of oxidation to anaplerosis and subsequent efflux of TCA cycle intermediates into newly synthesized compounds.

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