scholarly journals An oxidized magnetic Au single atom on doped TiO2(110) becomes a high performance CO oxidation catalyst due to the charge effect

2017 ◽  
Vol 5 (36) ◽  
pp. 19316-19322 ◽  
Author(s):  
J. L. Shi ◽  
X. J. Zhao ◽  
L. Y. Zhang ◽  
X. L. Xue ◽  
Z. X. Guo ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Co Oxidation ◽  
High Performance ◽  
Important Application ◽  
Oxidation Catalyst ◽  
Single Atom ◽  
Charge Effect ◽  
Extensive Investigation ◽  
Doped Tio2

Catalysis using gold nanoparticles supported on oxides has been under extensive investigation for many important application processes.

scholarly journals Complex Three-Dimensional Co3O4 Nano-Raspberry: Highly Stable and Active Low-temperature CO Oxidation Catalyst

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 662 ◽  
Author(s):  
Teruaki Fuchigami ◽  
Ryosuke Kimata ◽  
Masaaki Haneda ◽  
Ken-ichi Kakimoto
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
High Performance ◽  
Noble Metals ◽  
Three Dimensional ◽  
Oxidation Catalyst ◽  
High Catalytic Activity ◽  
Co3o4 Nanoparticles ◽  
Bridging Ligands ◽  
Low Temperature Co Oxidation

Highly stable and active low-temperature CO oxidation catalysts without noble metals are desirable to achieve a sustainable society. While zero-dimensional to three-dimensional Co3O4 nanoparticles show high catalytic activity, simple-structured nanocrystals easily self-aggregate and become sintered during catalytic reaction. Thus, complex three-dimensional nanostructures with high stability are of considerable interest. However, the controlled synthesis of complex nanoscale shapes remains a great challenge as no synthesis theory has been established. In this study, 100 nm raspberry-shaped nanoparticles composed of 7–8 nm Co3O4 nanoparticles were synthesized by hydrothermally treating cobalt glycolate solution with sodium sulfate. Surface single nanometer-scale structures with large surface areas of 89 m2·g−1 and abundant oxygen vacancies were produced. The sulfate ions functioned as bridging ligands to promote self-assembly and suppress particle growth. The Co3O4 nano-raspberry was highly stable under catalytic tests at 350 °C and achieved nearly 100% CO conversion at room temperature. The addition of bridging ligands is an effective method to control the formation of complex but ordered three-dimensional nanostructures that possessed extreme thermal and chemical stability and exhibited high performance.

Clay-based SiO2 as active support of gold nanoparticles for CO oxidation catalyst: Pivotal role of residual Al

2013 ◽  
Vol 35 ◽  
pp. 72-75 ◽  
Author(s):  
Yu Zhang ◽  
Bao Zhaorigetu ◽  
Meilin Jia ◽  
Chuncheng Chen ◽  
Jincai Zhao
Keyword(s):  
Gold Nanoparticles ◽  
Co Oxidation ◽  
Pivotal Role ◽  
Oxidation Catalyst ◽  
Residual Al

scholarly journals High-Performance Ru1 /CeO2 Single-Atom Catalyst for CO Oxidation: A Computational Exploration

ChemPhysChem ◽  
2016 ◽  
Vol 17 (20) ◽  
pp. 3170-3175 ◽  
Author(s):  
Fengyu Li ◽  
Lei Li ◽  
Xinying Liu ◽  
Xiao Cheng Zeng ◽  
Zhongfang Chen
Keyword(s):  
Co Oxidation ◽  
High Performance ◽  
Single Atom ◽  
Computational Exploration

Gold Nanoparticles Supported on Mesoporous Titania Thin Films with High Loading as a CO Oxidation Catalyst

2017 ◽  
Vol 12 (8) ◽  
pp. 877-881 ◽  
Author(s):  
Shingo Akita ◽  
Makoto Amemiya ◽  
Takanori Matsumoto ◽  
Yohei Jikihara ◽  
Tsuruo Nakayama ◽  
...  
Keyword(s):  
Thin Films ◽  
Gold Nanoparticles ◽  
Co Oxidation ◽  
Oxidation Catalyst ◽  
High Loading ◽  
Mesoporous Titania

High-performance and long-term stability of mesoporous Cu-doped TiO2 microsphere for catalytic CO oxidation

2021 ◽  
Vol 403 ◽  
pp. 123630 ◽  
Author(s):  
Wen-Ta Yang ◽  
Chin Jung Lin ◽  
Tiziano Montini ◽  
Paolo Fornasiero ◽  
Sofia Ya ◽  
...  
Keyword(s):  
Co Oxidation ◽  
High Performance ◽  
Catalytic Co Oxidation ◽  
Doped Tio2 ◽  
Term Stability ◽  
Long Term Stability ◽  
Tio2 Microsphere

Gold nanoparticles supported on hydroxylapatite as high performance catalysts for low temperature CO oxidation

2011 ◽  
Vol 101 (3-4) ◽  
pp. 560-569 ◽  
Author(s):  
Jun Huang ◽  
Lu-Cun Wang ◽  
Yong-Mei Liu ◽  
Yong Cao ◽  
He-Yong He ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Low Temperature ◽  
Co Oxidation ◽  
High Performance ◽  
Low Temperature Co Oxidation

scholarly journals Origin of Enhanced Water Oxidation Activity in an Iridium Single Atom Catalyst

2021 ◽  
Author(s):  
Xueli Zheng ◽  
Jing Tang ◽  
Alessandro Gallo ◽  
Jose Antonio Garrido Torres ◽  
Xiaoyun Yu ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Active Sites ◽  
High Performance ◽  
Operating Conditions ◽  
Utilization Efficiency ◽  
Oxidation Catalyst ◽  
Single Atom ◽  
Photochemical Reduction ◽  
Oxidation Activity

<p>The efficiency of the synthesis of renewable fuels and feedstocks from electrical sources is limited at present by the sluggish water oxidation reaction. Single atom catalysts (SACs) with a controllable coordination environment and exceptional atom utilization efficiency open new paradigms towards designing high performance water oxidation catalysts. Here, using<i> operando</i> X-ray absorption spectroscopy measurements with calculations of spectra and electrochemical activity, we demonstrate that the origin of water oxidation activity of IrNiFe SACs is the presence of highly oxidized Ir single atom (Ir<sup>5.3+</sup>)<sup> </sup>in the NiFe oxyhydroxide under operating conditions. We show that the optimal water oxidation catalyst could be achieved by systematically increasing the oxidation state and modulating the coordination environments of the Ir active sites anchored atop the NiFe oxyhydroxide layers. Based on the proposed mechanism, we have successfully anchored Ir single-atom sites on NiFe oxyhydroxides (Ir<sub>0.1</sub>/Ni<sub>9</sub>Fe SAC) via a unique<i> in situ</i> cryogenic photochemical reduction (<i>in situ</i> Cryo-PCR) method which delivers an overpotential of 183 millivolts at 10 milliamperes per square centimeter and retains its performance following 20 hours of operation in 1 M KOH electrolyte, outperforming the reported catalysts and the commercial IrO<sub>2</sub> catalysts. These findings open the avenue towards atomic-level understanding of oxygen evolution of catalytic centers under <i>in operando</i> condition.</p>

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