A green approach to the fabrication of a TiO2/NiAl-LDH core–shell hybrid photocatalyst for efficient and selective solar-powered reduction of CO2 into value-added fuels

2020 ◽  
Vol 8 (16) ◽  
pp. 8020-8032 ◽  
Author(s):  
Wan-Kuen Jo ◽  
Satyanarayana Moru ◽  
Surendar Tonda
Keyword(s):  
High Activity ◽  
Value Added ◽  
Solar Fuels ◽  
Core Shell ◽  
Green Approach ◽  
Solar Powered ◽  
Reduction Of Co2 ◽  
Hybrid Photocatalyst

A green approach is proposed to fabricate a TiO2/LDH core–shell hybrid as a potential catalyst for photoreduction of CO2 to solar fuels with high activity and selectivity.

scholarly journals Mediated Inner-Sphere Electron Transfer Induces Homogeneous Reduction of CO2 via Through-Space Electronic Conjugation

2021 ◽  
Author(s):  
Shelby L. Hooe ◽  
Juan Moreno ◽  
Amelia Reid ◽  
Emma Cook ◽  
Charles Machan
Keyword(s):  
Electron Transfer ◽  
Renewable Energy ◽  
Transition State ◽  
High Activity ◽  
Renewable Energy Sources ◽  
Value Added ◽  
Energy Sources ◽  
Electrocatalytic Reduction ◽  
Homogeneous Reduction ◽  
Reduction Of Co2

The electrocatalytic reduction of CO<sub>2</sub> is an appealing method for converting renewable energy sources into value-added chemical feedstocks. We report a co-electrocatalytic system for the reduction of CO<sub>2</sub> to CO comprised of a molecular Cr complex and dibenzothiophene-5,5-dioxide (DBTD) as a redox mediator which achieves high activity (TOF = 1.51-2.84 x 10<sup>5</sup> s<sup>–1</sup>) and quantitative selectivity. Under aprotic or protic conditions, DBTD produces a co-electrocatalytic response with <b>1</b> by coordinating <i>trans</i> to the site of CO<sub>2</sub> binding and mediating electron transfer from the electrode with quantitative efficiency for CO. This assembly is reliant on through-space electronic conjugation between the <i>π</i> frameworks of DBTD and the bpy fragment of the catalyst ligand, with contributions from dispersive interactions and weak sulfone coordination. The resulting interaction stabilizes a key intermediate in a new aprotic catalytic pathway and lowers the energy of the rate-determining transition state under protic conditions. To the best of our knowledge through-space electronic conjugation has not been explored in molecular electrocatalytic systems.<br>

Porous and amorphous cobalt hydroxysulfide core–shell nanoneedles on Ti-mesh as a bifunctional electrocatalyst for energy-efficient hydrogen production via urea electrolysis

2021 ◽  
Author(s):  
Yu Jiang ◽  
Shanshan Gao ◽  
Gongchen Xu ◽  
Xiaoming Song
Keyword(s):  
Hydrogen Production ◽  
High Activity ◽  
Energy Efficient ◽  
Bifunctional Catalyst ◽  
Core Shell ◽  
Bifunctional Electrocatalyst ◽  
Urea Electrolysis ◽  
Ti Mesh

Porous and amorphous CoSx(OH)y core–shell nanoneedles covered by numerous ultra-thin small nanosheets are synthesized successfully on Ti-mesh, and act as a high activity and stability bifunctional catalyst for urea electrolysis.

scholarly journals Porous Copper/Zinc Bimetallic Oxides Derived from MOFs for Efficient Photocatalytic Reduction of CO2 to Methanol

Catalysts ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1127
Author(s):  
Zhenyu Wang ◽  
Xiuling Jiao ◽  
Dairong Chen ◽  
Cheng Li ◽  
Minghui Zhang
Keyword(s):  
High Activity ◽  
Oxide Catalyst ◽  
Fast Rate ◽  
Metal Organic Framework ◽  
Photocatalytic Reduction ◽  
Simple Preparation ◽  
Porous Copper ◽  
Metal Organic ◽  
Copper Zinc ◽  
Reduction Of Co2

A novel metal organic framework (MOF)-derived porous copper/zinc bimetallic oxide catalyst was developed for the photoreduction of CO2 to methanol at a very fast rate of 3.71 mmol gcat−1 h−1. This kind of photocatalyst with high activity, selectivity and a simple preparation catalyst provides promising photocatalyst candidates for reducing CO2 to methanol.

Rational construction of a CdS/reduced graphene oxide/TiO2 core–shell nanostructure as an all-solid-state Z-scheme system for CO2 photoreduction into solar fuels

RSC Advances ◽  
2015 ◽  
Vol 5 (107) ◽  
pp. 88409-88413 ◽  
Author(s):  
Libang Kuai ◽  
Yong Zhou ◽  
Wengguang Tu ◽  
Ping Li ◽  
Haijin Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Solid State ◽  
Reduced Graphene Oxide ◽  
Solar Fuels ◽  
Photocatalytic Reduction ◽  
Core Shell ◽  
Electron Mediator ◽  
Co2 Photoreduction ◽  
Reduced Graphene ◽  
Rational Construction

An all-solid-state Z-scheme was constructed for the photocatalytic reduction of CO2, consisting of CdS and TiO2 as photocatalysts, and reduced graphene oxide as a solid electron mediator.

Preparation of Core-Shell Silica - 12-Tungstophosphoricacid Nanoparticles for Acylation of Aromatics

2013 ◽  
Vol 706-708 ◽  
pp. 219-223
Author(s):  
Hsiu Ling Hsu ◽  
Rosilda Selvin ◽  
L. Selva Roselin
Keyword(s):  
Liquid Phase ◽  
High Activity ◽  
Solid Acid ◽  
Coke Formation ◽  
Solid Acid Catalysts ◽  
Core Shell ◽  
Acid Catalysts ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles ◽  
Enhanced Selectivity

A variety of solid acid catalysts especially 12-Tungstophosphoricacid (DTP) supported on silica has been reported for the acylation of anisole, veratrole and toluene. However, the activity of this catalyst is susceptible to coke formation or poor activity. This paper reports the novelties of steam treated SiO2-DTP core-shell nanoparticles, which exhibits tremendous stability, high activity and enhanced selectivity in the liquid-phase acylation of anisole, veratrole and toluene as compared to conventional DTP supported on silica.

The synergetic effect of h-BN shells and subsurface B in CoBx@h-BN nanocatalysts for enhanced oxygen evolution reactions

2018 ◽  
Vol 6 (23) ◽  
pp. 10644-10648 ◽  
Author(s):  
Siru Chen ◽  
Yanqiang Li ◽  
Zhihua Zhang ◽  
Qiang Fu ◽  
Xinhe Bao
Keyword(s):  
High Activity ◽  
Oxygen Evolution ◽  
Synergetic Effect ◽  
Core Shell ◽  
Alloy Nanoparticles

CoBx@h-BN core–shell nanocatalysts were prepared via ammonization of Co–B alloy nanoparticles showing high activity and stability in oxygen evolution reactions.

Ni0.85Co0.15WO4 for Photocatalytic Reduction of CO2 Under Mild Conditions with High Activity and Selectivity

2020 ◽  
Vol 150 (11) ◽  
pp. 3071-3078
Author(s):  
Chunmei Guo ◽  
Biao Guo ◽  
Xiaosu Gao ◽  
Jing Liang ◽  
Qide Meng ◽  
...  
Keyword(s):  
High Activity ◽  
Photocatalytic Reduction ◽  
Mild Conditions ◽  
Reduction Of Co2
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