Identifying the Atomic-Level Effects of Metal Composition on the Structure and Catalytic Activity of Peptide-Templated Materials

ACS Nano ◽  
2015 ◽  
Vol 9 (12) ◽  
pp. 11968-11979 ◽  
Author(s):  
Nicholas A. Merrill ◽  
Erik M. McKee ◽  
Kyle C. Merino ◽  
Lawrence F. Drummy ◽  
Sungsik Lee ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Atomic Level ◽  
Metal Composition ◽  
Templated Materials

scholarly journals Linking Bi-Metal Distribution Patterns in Porous Carbon Nitride Fullerene to Its Catalytic Activity toward Gas Adsorption

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1794
Author(s):  
Parisa Nematollahi ◽  
Erik C. Neyts
Keyword(s):  
Catalytic Activity ◽  
Carbon Nitride ◽  
Gas Adsorption ◽  
Distribution Patterns ◽  
Catalyst Design ◽  
Metal Distribution ◽  
Binary Complex ◽  
Metal Atoms ◽  
Metal Composition ◽  
Single Transition

Immobilization of two single transition metal (TM) atoms on a substrate host opens numerous possibilities for catalyst design. If the substrate contains more than one vacancy site, the combination of TMs along with their distribution patterns becomes a design parameter potentially complementary to the substrate itself and the bi-metal composition. By means of DFT calculations, we modeled three dissimilar bi-metal atoms (Ti, Mn, and Cu) doped into the six porphyrin-like cavities of porous C24N24 fullerene, considering different bi-metal distribution patterns for each binary complex, viz. TixCuz@C24N24, TixMny@C24N24, and MnyCuz@C24N24 (with x, y, z = 0–6). We elucidate whether controlling the distribution of bi-metal atoms into the C24N24 cavities can alter their catalytic activity toward CO2, NO2, H2, and N2 gas capture. Interestingly, Ti2Mn4@C24N24 and Ti2Cu4@C24N24 complexes showed the highest activity and selectively toward gas capture. Our findings provide useful information for further design of novel few-atom carbon-nitride-based catalysts.

Theoretical insights into the effective hydrogen evolution on Cu3P and its evident improvement by surface-doped Ni atoms

2018 ◽  
Vol 20 (15) ◽  
pp. 10407-10417 ◽  
Author(s):  
Zengsong Zhang ◽  
Guangtao Yu ◽  
Hui Li ◽  
Jingwei Liu ◽  
Xuri Huang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Deep Understanding ◽  
Atomic Level ◽  
Significant Enhancement ◽  
Effective Hydrogen

Deep understanding at the atomic level of the HER catalytic activity of Cu3P and its significant enhancement by surface-doped Ni atoms.

Highly efficient catalytic activity for the hydrogen evolution reaction on pristine and monovacancy defected WP systems: a first-principles investigation

2018 ◽  
Vol 20 (20) ◽  
pp. 13757-13764 ◽  
Author(s):  
Yanfeng Ma ◽  
Guangtao Yu ◽  
Ting Wang ◽  
Chenghui Zhang ◽  
Xuri Huang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
First Principles ◽  
Deep Understanding ◽  
Atomic Level ◽  
Highly Efficient ◽  
Tungsten Phosphide

A deep understanding of HER catalytic activity of tungsten phosphide at the atomic level and its effective improvement by introducing a monovacancy.

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.

A boron imidazolate framework with mechanochromic and electrocatalytic properties

2018 ◽  
Vol 5 (6) ◽  
pp. 1151-1155 ◽  
Author(s):  
Tian Wen ◽  
Yao Zheng ◽  
Chaochen Xu ◽  
Jian Zhang ◽  
Mietek Jaroniec ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Atomic Level ◽  
Electrocatalytic Properties

An alkaline-stable anionic Cd(ii) boron imidazolate framework (BIF-89) not only exhibits unique mechanochromic behavior, but also shows an enhanced oxygen evolution reaction (OER) catalytic activity due to the presence of uncoordinated −COO groups able to capture Fe at the atomic level.

scholarly journals Correlating Synthetic Methods, Morphology, Atomic-Level Structure, and Catalytic Activity of Sn-β Catalysts

ACS Catalysis ◽  
2016 ◽  
Vol 6 (7) ◽  
pp. 4047-4063 ◽  
Author(s):  
Patrick Wolf ◽  
Maxence Valla ◽  
Francisco Núñez-Zarur ◽  
Aleix Comas-Vives ◽  
Aaron J. Rossini ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Level Structure ◽  
Atomic Level ◽  
Synthetic Methods

Ferrite@TiO2-nanocomposites as Z-scheme photocatalysts for CO2 conversion: Insight into the correlation of the Co-Zn metal composition and the catalytic activity

2020 ◽  
Vol 36 ◽  
pp. 177-186 ◽  
Author(s):  
Radu-George Ciocarlan ◽  
Nick Hoeven ◽  
Erdem Irtem ◽  
Virginia Van Acker ◽  
Myrjam Mertens ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co2 Conversion ◽  
Metal Composition ◽  
Insight Into

High resolution electron microscopy of lanthanum phosphate crystals

1978 ◽  
Vol 36 (1) ◽  
pp. 274-275
Author(s):  
J. C. Wheatley ◽  
J. M. Cowley
Keyword(s):  
Electron Microscopy ◽  
Catalytic Activity ◽  
High Resolution ◽  
Petroleum Industry ◽  
High Resolution Electron Microscopy ◽  
Lanthanum Phosphate ◽  
Good Catalyst ◽  
Resolution Electron ◽  
Good Catalytic Activity ◽  
Physical And Chemical

Rare-earth phosphates are of particular interest because of their catalytic properties associated with the hydrolysis of many aromatic chlorides in the petroleum industry. Lanthanum phosphates (LaPO4) which have been doped with small amounts of copper have shown increased catalytic activity (1). However the physical and chemical characteristics of the samples leading to good catalytic activity are not known.Many catalysts are amorphous and thus do not easily lend themselves to methods of investigation which would include electron microscopy. However, the LaPO4, crystals are quite suitable samples for high resolution techniques.The samples used were obtained from William L. Kehl of Gulf Research and Development Company. The electron microscopy was carried out on a JEOL JEM-100B which had been modified for high resolution microscopy (2). Standard high resolution techniques were employed. Three different sample types were observed: 669A-1-5-7 (poor catalyst), H-L-2 (good catalyst) and 27-011 (good catalyst).

Atomic-level imaging of the surface structure of Ag2O

1984 ◽  
Vol 42 ◽  
pp. 656-657
Author(s):  
William Krakow
Keyword(s):  
High Vacuum ◽  
Atomic Level ◽  
Ultra High Vacuum ◽  
Research Groups ◽  
Resolution Electron ◽  
Surface Reconstructions ◽  
Order Of Magnitude ◽  
High Resolution Electron Microscope ◽  
Saturated Structure ◽  
Transmission And Reflection

In recent years electron microscopy has been used to image surfaces in both the transmission and reflection modes by many research groups. Some of this work has been performed under ultra high vacuum conditions (UHV) and apparent surface reconstructions observed. The level of resolution generally has been at least an order of magnitude worse than is necessary to visualize atoms directly and therefore the detailed atomic rearrangements of the surface are not known. The present author has achieved atomic level resolution under normal vacuum conditions of various Au surfaces. Unfortunately these samples were exposed to atmosphere and could not be cleaned in a standard high resolution electron microscope. The result obtained surfaces which were impurity stabilized and reveal the bulk lattice (1x1) type surface structures also encountered by other surface physics techniques under impure or overlayer contaminant conditions. It was therefore decided to study a system where exposure to air was unimportant by using a oxygen saturated structure, Ag2O, and seeking to find surface reconstructions, which will now be described.

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