scholarly journals In Situ Spectroscopic Investigation into the Active Sites for Crotonaldehyde Hydrogenation at the Pt Nanoparticle–Co3O4 Interface

ACS Catalysis ◽  
2016 ◽  
Vol 6 (10) ◽  
pp. 7140-7147 ◽  
Author(s):  
Griffin Kennedy ◽  
Gérôme Melaet ◽  
Hui-Ling Han ◽  
Walter T. Ralston ◽  
Gabor A. Somorjai
Keyword(s):  
Spectroscopic Investigation ◽  
Active Sites ◽  
Pt Nanoparticle ◽  
Crotonaldehyde Hydrogenation

scholarly journals Electrokinetic and in situ spectroscopic investigations of CO electrochemical reduction on copper

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jing Li ◽  
Xiaoxia Chang ◽  
Haochen Zhang ◽  
Arnav S. Malkani ◽  
Mu-jeng Cheng ◽  
...  
Keyword(s):  
Mass Transport ◽  
Active Sites ◽  
Gas Diffusion ◽  
Reduction Reaction ◽  
Adsorbed Hydrogen ◽  
Diffusion Type ◽  
Proton Coupled Electron Transfer ◽  
Alkaline Electrolytes ◽  
Reaction Orders

AbstractRigorous electrokinetic results are key to understanding the reaction mechanisms in the electrochemical CO reduction reaction (CORR), however, most reported results are compromised by the CO mass transport limitation. In this work, we determined mass transport-free CORR kinetics by employing a gas-diffusion type electrode and identified dependence of catalyst surface speciation on the electrolyte pH using in-situ surface enhanced vibrational spectroscopies. Based on the measured Tafel slopes and reaction orders, we demonstrate that the formation rates of C2+ products are most likely limited by the dimerization of CO adsorbate. CH4 production is limited by the CO hydrogenation step via a proton coupled electron transfer and a chemical hydrogenation step of CO by adsorbed hydrogen atom in weakly (7 < pH < 11) and strongly (pH > 11) alkaline electrolytes, respectively. Further, CH4 and C2+ products are likely formed on distinct types of active sites.

In-situ/operando techniques to identify active sites for thermochemical conversion of CO2 over heterogeneous catalysts

2021 ◽  
Author(s):  
Kai Feng ◽  
Yaning Wang ◽  
Man Guo ◽  
Jingpeng Zhang ◽  
Zhengwen Li ◽  
...  
Keyword(s):  
Active Sites ◽  
Heterogeneous Catalysts ◽  
Thermochemical Conversion

Time-Resolved, in Situ, Small- and Wide-Angle X-ray Scattering To Monitor Pt Nanoparticle Structure Evolution Stabilized by Adsorbed SnCl3– Ligands During Synthesis

2013 ◽  
Vol 117 (15) ◽  
pp. 7924-7933 ◽  
Author(s):  
Samuel St. John ◽  
Naiping Hu ◽  
Dale W. Schaefer ◽  
Anastasios P. Angelopoulos
Keyword(s):  
Structure Evolution ◽  
Wide Angle ◽  
Pt Nanoparticle ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Nanoparticle Structure ◽  
Ray Scattering

Diffuse Reflectance FT-IR Characterization of Active Sites under Reaction Conditions: The Production of Oxygenates in the CO/H2 Reaction

1994 ◽  
Vol 48 (10) ◽  
pp. 1208-1212 ◽  
Author(s):  
J. J. Benítez ◽  
I. Carrizosa ◽  
J. A. Odriozola
Keyword(s):  
Infrared Spectra ◽  
Active Sites ◽  
Diffuse Reflectance ◽  
Reaction Conditions ◽  
In Situ Drifts ◽  
Ft Ir

The reactivity of a Lu2O3-promoted Rh/Al2O3 catalyst in the CO/H2 reaction is reported. Methane, heavier hydrocarbons, methanol, and ethanol are obtained. In situ DRIFTS has been employed to record the infrared spectra under the actual reaction conditions. The structure of the observed COads DRIFTS bands has been resolved into its components. The production of oxygenates (methanol and ethanol) has been correlated with the results of the deconvolution calculation. Specific sites for the production of methanol and ethanol in the CO/H2 reaction over a Rh,Lu2O3/Al2O3 catalyst are proposed.

In-Situ Confined Growth of Monodisperse Pt Nanoparticle@Graphene Nanobox Composites as Electrocatalytic Nanoreactors

Small ◽  
2014 ◽  
Vol 11 (8) ◽  
pp. 1003-1010 ◽  
Author(s):  
Yingying Lv ◽  
Yin Fang ◽  
Zhangxiong Wu ◽  
Xufang Qian ◽  
Yanfang Song ◽  
...  
Keyword(s):  
Pt Nanoparticle ◽  
Confined Growth

In situ X-ray spectroscopic investigation of thermal decomposition of double complex salt [Pt(NH3)4][OsCl6]

2017 ◽  
Vol 58 (5) ◽  
pp. 901-910 ◽  
Author(s):  
T. I. Asanova ◽  
I. P. Asanov ◽  
M.-G. Kim ◽  
S. V. Korenev
Keyword(s):  
Thermal Decomposition ◽  
Spectroscopic Investigation ◽  
Complex Salt ◽  
Double Complex ◽  
Double Complex Salt ◽  
X Ray

Construction of Hierarchical ZnIn2S4/C3N4 Heterojunction for Enhanced Photocatalytic Degradation of Tetracycline

2022 ◽  
Author(s):  
Feng Min ◽  
Zhengqing Wei ◽  
Zhen Yu ◽  
Yu-Ting Xiao ◽  
Shien Guo ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Organic Contaminants ◽  
Charge Separation ◽  
Active Sites ◽  
In Situ Growth ◽  
Efficient Charge

Both efficient charge separation and sufficiently exposed active sites are critical limiting for solar-driven organic contaminants degradation. Herein, we describe a hierarchical heterojunction photocatalyst fabricated by in situ growth of...

Electrochemically controlled in-situ conversion of CO2 to defective carbon nanotubes for enhanced H2O2 production

Nanoscale ◽  
2021 ◽  
Author(s):  
Ao Yu ◽  
Guoming Ma ◽  
Longtao Zhu ◽  
Yajing Hu ◽  
Ruiling Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Active Sites ◽  
Catalytic Reactions ◽  
H2o2 Production

Defects on carbon nanotubes (CNTs) can be used as active sites to promote the occurrence of catalytic reactions and improve the ability of catalysts. Although some progress has been made...

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