Heterogeneous Enantioselective Catalysis with Chiral Encoded Mesoporous Pt−Ir Films Supported on Ni Foam

Author(s):  
Sunpet Assavapanumat ◽  
Sopon Butcha ◽  
Somlak Ittisanronnachai ◽  
Alexander Kuhn ◽  
Chularat Wattanakit
Author(s):  
Boran Wang ◽  
Mengjie Lu ◽  
Duo Chen ◽  
Qi Zhang ◽  
Wenwen Wang ◽  
...  

A self-supported nickel-iron nitride microsheet arrays coated with carbon is grown on commercial Ni foam (NixFeyN@C/NF) and used as electrocatalyst for splitting of seawater. The porous architecture and superhydrophilic/superaerophobic surface...


2021 ◽  
Vol 133 ◽  
pp. 105978
Author(s):  
Meenal D. Patil ◽  
Suprimkumar D. Dhas ◽  
Amol A. Mane ◽  
Annasaheb V. Moholkar

Author(s):  
Mutawara Mahmood Baig ◽  
Muhammad Taqi Mehran ◽  
Ramsha Khan ◽  
Khalid Mehmood ◽  
Salman Raza Naqvi ◽  
...  

2021 ◽  
Author(s):  
Shuai Wang ◽  
Zheng Lu ◽  
Yuan Fang ◽  
Tian Zheng ◽  
Zidong Zhang ◽  
...  

Rational construction of self-supporting electrode has been extensively investigated in energy conversion and storage. Herein, hierarchical N-doped carbon encapsulated Ni3S2 grown on 3D porous Ni foam (H-Ni3S2@NC/NF) is controllably synthesized...


2021 ◽  
Author(s):  
Nanasaheb M. Shinde ◽  
Siddheshwar D. Raut ◽  
Balaji G. Ghule ◽  
Krishna Chaitanya Gunturu ◽  
James J. Pak ◽  
...  

A promising electrode for hydrogen evolution reaction (HER) has been prepared via a reduction process to form NiF2 nanorod arrays directly grown on a 3D nickel foam.


2021 ◽  
Vol 4 (2) ◽  
pp. 1619-1627
Author(s):  
Min Kang ◽  
Hai Zhou ◽  
Pushan Wen ◽  
Ning Zhao

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1320
Author(s):  
Shaik Gouse Peera ◽  
Ravindranadh Koutavarapu ◽  
Chao Liu ◽  
Gaddam Rajeshkhanna ◽  
Arunchander Asokan ◽  
...  

Electrochemical water splitting is considered a promising way of producing hydrogen and oxygen for various electrochemical energy devices. An efficient single, bi-functional electrocatalyst that can perform hydrogen evolution reactions (HERs) and oxygen evolution reactions (OERs) is highly essential. In this work, Co@NC core-shell nanoparticles were synthesized via a simple, eco-friendly, solid-state synthesis process, using cobalt nitrate and with pyrazole as the N and C source. The morphological analysis of the resulting Co@NC nanoparticles was performed with a scanning and transmission electron microscope, which showed Co nanoparticles as the core and the pyrolysis of pyrazole organic ligand N-doped carbon derived shell structure. The unique Co@NC nanostructures had excellent redox sites for electrocatalysis, wherein the N-doped carbon shell exhibited superior electronic conductivity in the Co@NC catalyst. The resulting Co@NC nanocatalyst showed considerable HER and OER activity in an alkaline medium. The Co@NC catalyst exhibited HERs overpotentials of 243 and 170 mV at 10 mA∙cm−2 on glassy carbon and Ni foam electrodes, respectively, whereas OERs were exhibited overpotentials of 450 and 452 mV at a current density of 10 and 50 mA∙cm−2 on glassy carbon electrode and Ni foam, respectively. Moreover, the Co@NC catalyst also showed admirable durability for OERs in an alkaline medium.


Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 657
Author(s):  
Geul Han Kim ◽  
Yoo Sei Park ◽  
Juchan Yang ◽  
Myeong Je Jang ◽  
Jaehoon Jeong ◽  
...  

Developing high performance, highly stable, and low-cost electrodes for the oxygen evolution reaction (OER) is challenging in water electrolysis technology. However, Ir- and Ru-based OER catalysts with high OER efficiency are difficult to commercialize as precious metal-based catalysts. Therefore, the study of OER catalysts, which are replaced by non-precious metals and have high activity and stability, are necessary. In this study, a copper–cobalt oxide nanosheet (CCO) electrode was synthesized by the electrodeposition of copper–cobalt hydroxide (CCOH) on Ni foam followed by annealing. The CCOH was annealed at various temperatures, and the structure changed to that of CCO at temperatures above 250 °C. In addition, it was observed that the nanosheets agglomerated when annealed at 300 °C. The CCO electrode annealed at 250 °C had a high surface area and efficient electron conduction pathways as a result of the direct growth on the Ni foam. Thus, the prepared CCO electrode exhibited enhanced OER activity (1.6 V at 261 mA/cm2) compared to those of CCOH (1.6 V at 144 mA/cm2), Co3O4 (1.6 V at 39 mA/cm2), and commercial IrO2 (1.6 V at 14 mA/cm2) electrodes. The optimized catalyst also showed high activity and stability under high pH conditions, demonstrating its potential as a low cost, highly efficient OER electrode material.


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