Cobalt-Catalyzed Alkyne Hydrosilylation as a New Frontier to Selectively Access Silyl-Hydrocarbons

2021 ◽  
Author(s):  
Jung-Woo Park
Keyword(s):  
Noble Metal ◽  
Chemical Method ◽  
Value Added ◽  
New Frontier ◽  
Alkyne Hydrosilylation

Hydrosilylation of alkynes is a chief chemical method in accessing a range of alkenylsilanes, which can be derivatized to obtain value-added hydrocarbons and utilized in diverse applications. While noble-metal-based catalytic...

scholarly journals Correction: Cobalt-catalyzed alkyne hydrosilylation as a new frontier to selectively access silyl-hydrocarbons

2022 ◽  
Author(s):  
Jung-Woo Park
Keyword(s):  
New Frontier ◽  
Alkyne Hydrosilylation

Correction for ‘Cobalt-catalyzed alkyne hydrosilylation as a new frontier to selectively access silyl-hydrocarbons’ by Jung-Woo Park et al., Chem. Commun., 2022, DOI: 10.1039/d1cc06214j.

scholarly journals Synthesis of Ni2P/CdS and Pt/TiO2 nanocomposite for photoreduction of CO2 into methanol

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Penumaka Nagababu ◽  
Sehba Anjum Mumtaz Ahmed ◽  
Y. Taraka Prabhu ◽  
Ankush kularkar ◽  
Subhamoy Bhowmick ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Solar Energy ◽  
Physicochemical Properties ◽  
Noble Metal ◽  
Value Added ◽  
Spectroscopic Techniques ◽  
Efficient Catalyst ◽  
Metal Free ◽  
Value Added Products

AbstractIt is a great challenge to convert thermochemically stable CO2 into value-added products such as CH4, CH3OH, CO via utilizing solar energy. It is also a difficult task to develop an efficient catalyst for the reduction of CO2. We have designed and synthesized noble metal-free photocatalytic nanostructure Ni2P/CdS and Pt/TiO2 for conversion of CO2 to methanol in the presence of sacrificial donor triethylamine (TEA) and hydrogen peroxide. The synthesised catalysts physicochemical properties were studied by using several spectroscopic techniques like; XRD, UV-DRS, XPS, TEM, SEM and PL. Quantification of methanol by GC–MS showed encouraging results of 1424.8 and 2843 μmol g−1 of catalyst for Pt/TiO2 and 5 wt% Ni2P/CdS composites, respectively. Thus, Ni2P/CdS is a promising catalyst with higher productivity and significant selectivity than in-vogue catalysts.

scholarly journals Divergent functionalization of aldehydes photocatalyzed by neutral eosin Y with sulfone reagents

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jianming Yan ◽  
Haidi Tang ◽  
Eugene Jun Rong Kuek ◽  
Xiangcheng Shi ◽  
Chenguang Liu ◽  
...  
Keyword(s):  
Hydrogen Atom ◽  
Noble Metal ◽  
Continuous Flow ◽  
Scale Up ◽  
Value Added ◽  
Hydrogen Atom Transfer ◽  
Eosin Y ◽  
Noble Metal Catalysts ◽  
Green Approach ◽  
Acyl Radicals

AbstractWhile aldehydes represent a classic class of electrophilic synthons, the corresponding acyl radicals are inherently nucleophilic, which exhibits umpolung reactivity. Generation of acyl radicals typically requires noble metal catalysts or excess oxidants to be added. Herein, we report a convenient and green approach to access acyl radicals, capitalizing on neutral eosin Y-enabled hydrogen atom transfer (HAT) photocatalysis with aldehydes. The generated acyl radicals underwent SOMOphilic substitutions with various functionalized sulfones (X–SO2R’) to deliver value-added acyl products. The merger of eosin Y photocatalysis and sulfone-based SOMOphiles provides a versatile platform for a wide array of aldehydic C–H functionalizations, including fluoromethylthiolation, arylthiolation, alkynylation, alkenylation and azidation. The present protocol features green characteristics, such as being free of metals, harmful oxidants and additives; step-economic; redox-neutral; and amenable to scale-up assisted by continuous-flow technology.

scholarly journals Schottky Junction Methane Sensors Using Electrochemically Grown Nanocrystalline-Nanoporous ZnO Thin Films

2009 ◽  
Vol 2009 ◽  
pp. 1-9 ◽  
Author(s):  
P. K. Basu ◽  
N. Saha ◽  
S. K. Jana ◽  
H. Saha ◽  
A. Lloyd Spetz ◽  
...  
Keyword(s):  
Thin Films ◽  
Noble Metal ◽  
Chemical Method ◽  
Electrochemical Anodization ◽  
Zno Thin Films ◽  
Schottky Junction ◽  
Metal Contacts ◽  
Sensing Mechanism ◽  
Anodization Method ◽  
Sensing Performance

Nanocrystalline-nanoporous ZnO thin films were prepared by an electrochemical anodization method, and the films were tested as methane sensors. It was found that Pd-Ag catalytic contacts showed better sensing performance compared to other noble metal contacts like Pt and Rh. The methane sensing temperature could be reduced to as low as by sensitizing nanocrystalline ZnO thin films with Pd, deposited by chemical method. The sensing mechanism has been discussed briefly.

scholarly journals Recent Advances in Photocatalytic CO2 Utilisation Over Multifunctional Metal–Organic Frameworks

Catalysts ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1176
Author(s):  
Priyanka Verma ◽  
Daniel J. Stewart ◽  
Robert Raja
Keyword(s):  
Noble Metal ◽  
Metal Organic Frameworks ◽  
Value Added ◽  
Structure Property ◽  
Research Attention ◽  
Practical Applications ◽  
Efficient Charge ◽  
Metal Organic ◽  
Carbon Dioxide Co2 ◽  
Reduction Of Co2

The efficient conversion of carbon dioxide (CO2) to high-value chemicals using renewable solar energy is a highly attractive but very challenging process that is used to address ever-growing energy demands and environmental issues. In recent years, metal–organic frameworks (MOFs) have received significant research attention owing to their tuneability in terms of their composition, structure, and multifunctional characteristics. The functionalisation of MOFs by metal nanoparticles (NPs) is a promising approach used to enhance their light absorption and photocatalytic activity. The efficient charge separation and strong CO2 binding affinity of hybrid MOF-based photocatalysts facilitate the CO2 conversion process. This review summarises the latest advancements involving noble metal, non-noble-metal, and miscellaneous species functionalised MOF-based hybrid photocatalysts for the reduction of CO2 to carbon monoxide (CO) and other value-added chemicals. The novel synthetic strategies and their corresponding structure–property relationships have also been discussed for solar-to-chemical energy conversion. Furthermore, the current challenges and prospects in practical applications are also highlighted for sustainable energy production.

Solar-light-driven photocatalytic production of peroxydisulfate over noble-metal loaded WO3

2019 ◽  
Vol 55 (26) ◽  
pp. 3813-3816 ◽  
Author(s):  
Zeai Huang ◽  
Yugo Miseki ◽  
Kazuhiro Sayama
Keyword(s):  
Noble Metal ◽  
Value Added ◽  
Light Irradiation ◽  
Solar Light ◽  
Chemical Reagent ◽  
Simulated Solar Light ◽  
Solar Light Irradiation

The high-value-added chemical reagent peroxydisulfate (S2O82−) was produced photocatalytically over noble-metal loaded WO3 powder suspensions in aqueous H2SO4 under flowing O2 and simulated solar light irradiation.

CO2 adsorption on gas-phase Cu4−xPtx (x = 0–4) clusters: a DFT study

2018 ◽  
Vol 20 (25) ◽  
pp. 17071-17080 ◽  
Author(s):  
Luis E. Gálvez-González ◽  
J. Octavio Juárez-Sánchez ◽  
Rafael Pacheco-Contreras ◽  
Ignacio L. Garzón ◽  
Lauro Oliver Paz-Borbón ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Gas Phase ◽  
Noble Metal ◽  
Metal Clusters ◽  
Co2 Adsorption ◽  
Value Added ◽  
Dft Study ◽  
Novel Materials

Transition and noble metal clusters have proven to be critical novel materials, potentially offering major advantages over conventional catalysts in a range of value-added catalytic processess such as carbon dioxide transformation to methanol.

An Electricity and Value-Added Gases Co-Generation via Solid Oxide Fuel Cells

2013 ◽  
Author(s):  
Kang Wang ◽  
Pingying Zeng ◽  
Jeongmin Ahn
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Value Added ◽  
Open Circuit ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Energy Field ◽  
New Frontier ◽  
Cogeneration System ◽  
Novel Strategy

In this study, an electricity and value-added chemicals cogeneration system using methane-fueled single chamber solid oxide fuel cells (SC-SOFCs) was successfully developed and investigated. The SC-SOFCs, which operated on methane/oxygen gas mixture with a ratio of 2:1, achieved an open-circuit voltage of 1.0 V and a maximum peak power density of ∼ 840 mW.cm-2 at 700 °C. By passing the exhaust gas of the fuel cell through a Ru/Al2O3 catalyst at 700 °C, the synthesis gas is obtained with a methane conversion of higher than 95%, while CO and H2 selectivity is higher than 92%. This study provides a novel strategy for energy conversion which is one of the major concerns in energy field and a new frontier for improving the energy efficiency of SOFCs.

scholarly journals Weaving a web of reliable thermochemistry around lignin building blocks: phenol, benzaldehyde, and anisole

2021 ◽  
Author(s):  
Sergey P. Verevkin
Keyword(s):  
Phase Transition ◽  
Gas Phase ◽  
Quantum Chemical ◽  
Chemical Method ◽  
Value Added ◽  
Building Blocks ◽  
Enthalpies Of Formation ◽  
Quantum Chemical Method ◽  
Substituted Benzenes ◽  
Energy Balances

Abstract Substituted benzenes such as phenol, benzaldehyde, and anisole are the simplest fragments from the lignin separation feedstocks. We have collected available primary experimental results on vapour pressures, enthalpies of phase transition, and enthalpies of combustion of phenol, benzaldehyde, and anisole. The resulting data on the gas-phase standard molar enthalpies of formation were validated using the quantum chemical method G4. The consistent sets of evaluated thermodynamic data are essential for calculating the energy balances of lignin conversion in the value-added chemicals and materials. Graphic abstract

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