scholarly journals Preparation and Catalytic Activity for Aerobic Glucose Oxidation of Crown Jewel Structured Pt/Au Bimetallic Nanoclusters

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Haijun Zhang ◽  
Liqiong Wang ◽  
Lilin Lu ◽  
Naoki Toshima
Keyword(s):  
Catalytic Activity ◽  
Glucose Oxidation ◽  
Bimetallic Nanoclusters

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

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.

DNA-templated silver and silver-based bimetallic clusters with remarkable and sequence-related catalytic activity toward 4-nitrophenol reduction

2019 ◽  
Vol 55 (3) ◽  
pp. 373-376 ◽  
Author(s):  
Weijun Zhou ◽  
Youxing Fang ◽  
Jiangtao Ren ◽  
Shaojun Dong
Keyword(s):  
Catalytic Activity ◽  
Bimetallic Clusters ◽  
Schematic Representation ◽  
Bimetallic Nanoclusters ◽  
Nitrophenol Reduction

Illustrative pathways for the preparation of bimetallic nanoclusters using DNA-AgNC, and a schematic representation of the reduction of 4-NP to 4-AP in the presence of DNA-AgNC or bimetallic nanoclusters.

Template-based electrodeposition of Pt/Ni nanowires and its catalytic activity towards glucose oxidation

2011 ◽  
Vol 58 ◽  
pp. 551-555 ◽  
Author(s):  
Sahar Sadat Mahshid ◽  
Sara Mahshid ◽  
Abolghasem Dolati ◽  
Mohammad Ghorbani ◽  
Lixia Yang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Glucose Oxidation

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

2008 ◽  
Vol 47 (48) ◽  
pp. 9265-9268 ◽  
Author(s):  
Tamao Ishida ◽  
Naoto Kinoshita ◽  
Hiroko Okatsu ◽  
Tomoki Akita ◽  
Takashi Takei ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Glucose Oxidation ◽  
Gold Clusters

Cascade catalysis of highly active bimetallic Au/Pd nanoclusters: structure–function relationship investigation using anomalous small-angle X-ray scattering and UV–Vis spectroscopy

2013 ◽  
Vol 46 (5) ◽  
pp. 1353-1360 ◽  
Author(s):  
Sylvio Haas ◽  
Robert Fenger ◽  
Edoardo Fertitta ◽  
Klaus Rademann
Keyword(s):  
Catalytic Activity ◽  
Structural Characteristics ◽  
High Surface ◽  
Volume Ratio ◽  
Single Type ◽  
High Catalytic Activity ◽  
Highly Active ◽  
Bimetallic Nanoclusters ◽  
Vis Spectroscopy ◽  
Cascade Catalysis

Recently, a so-called `crown-jewel' concept of preparation of Au/Pd-based colloidal nanoclusters has been reported [Zhang, Watanabe, Okumura, Haruta & Toshima (2011).Nat. Mater.11, 49–52]. Here, a different way of preparing highly active Au/Pd-based nanoclusters is presented. The origin of the increased activity of Au/Pd-based colloidal bimetallic nanoclusters was unclear up to now. However, it is, in general, accepted that in the nanometre range (1–100 nm) the cluster size, shape and composition affect the structural characteristics (e.g.lattice symmetry, unit cell), electronic properties (e.g.band gap) and chemical properties (e.g.catalytic activity) of a material. Hence, a detailed study of the relationship between the nanostructure of nanoclusters and their catalytic activity is presented here. The results indicate that a high surface-to-volume ratio of the nanoclusters combined with the presence of `both' Au and Pd isolated regions at the surface are crucial to achieve a high catalytic activity. A detailed structure elucidation directly leads to a mechanistic proposal, which indeed explains the higher catalytic activity of Au/Pd-based catalysts compared with pure metallic Au or Pd. The mechanism is based on cascade catalysis induced by a single type of nanoparticle with an intermixed surface of Au and Pd.

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

Electrochem ◽  
2020 ◽  
Vol 1 (4) ◽  
pp. 394-399
Author(s):  
Yuki Ito ◽  
Tso-Fu Mark Chang ◽  
Yu-An Chien ◽  
Chun-Yi Chen ◽  
Parthojit Chakraborty ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Glucose Oxidation ◽  
Gold Clusters ◽  
Atomic Level ◽  
Atomic Size ◽  
Electrodeposition Process ◽  
Oxidation Current ◽  
Au Cluster ◽  
Phosphate Buffered Saline ◽  
Oxidation Of Glucose

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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