Pyrolysis-Free Covalent Organic Frameworks-Based Materials for Efficient Oxygen Electrocatalysis

2021 ◽  
Author(s):  
Xun Cui ◽  
Likun Gao ◽  
Rui Ma ◽  
Zhengnan Wei ◽  
Cheng-Hsin Lu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Performance ◽  
Low Cost ◽  
Sustainable Energy ◽  
Water Electrolysis ◽  
Vital Role ◽  
Covalent Organic Frameworks ◽  
Energy Technologies

Low-cost and high-performance electrocatalysts towards oxygen electrocatalysis play a vital role in the widespread applications of oxygen-based sustainable-energy technologies such as fuel cells, metal-air batteries and water electrolysis. Despite enormous...

scholarly journals Synthesis of catalysts with fine platinum particles supported by high-surface-area activated carbons and optimization of their catalytic activities for polymer electrolyte fuel cells

RSC Advances ◽  
2021 ◽  
Vol 11 (33) ◽  
pp. 20601-20611
Author(s):  
Md. Mijanur Rahman ◽  
Kenta Inaba ◽  
Garavdorj Batnyagt ◽  
Masato Saikawa ◽  
Yoshiki Kato ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
High Performance ◽  
Activated Carbons ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Polymer Electrolyte Fuel Cells ◽  
Supported Platinum ◽  
Platinum Particles

Herein, we demonstrated that carbon-supported platinum (Pt/C) is a low-cost and high-performance electrocatalyst for polymer electrolyte fuel cells (PEFCs).

FeCoNi nanoalloys embedded in hierarchical N-rich carbon matrix with enhanced oxygen electrocatalysis for rechargeable Zn-air batteries

2021 ◽  
Author(s):  
Jinlong Liu ◽  
Ziyu Luo ◽  
Xinxin Zhang ◽  
Hailong Zheng ◽  
Lei Peng ◽  
...  
Keyword(s):  
High Performance ◽  
Sustainable Energy ◽  
Carbon Matrix ◽  
Energy Technologies ◽  
Structure Engineering

Component optimization and structure engineering are commonly used strategies to realize high-performance electrocatalysts for sustainable energy technologies. Herein, we successfully synthesized FeCoNi nanoalloys embedded in a hierarchical N-rich carbon matrix...

scholarly journals Nanosheets of CuCo2O4 As a High-Performance Electrocatalyst in Urea Oxidation

2019 ◽  
Vol 9 (4) ◽  
pp. 793 ◽  
Author(s):  
Camila Zequine ◽  
Fangzhou Wang ◽  
Xianglin Li ◽  
Deepa Guragain ◽  
S.R. Mishra ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Photoelectron Spectroscopy ◽  
High Performance ◽  
Nickel Foam ◽  
Low Cost ◽  
Agricultural Waste ◽  
Bifunctional Catalyst ◽  
X Ray Diffraction ◽  
X Ray ◽  
Electroactive Material

The urea oxidation reaction (UOR) is a possible solution to solve the world’s energy crisis. Fuel cells have been used in the UOR to generate hydrogen with a lower potential compared to water splitting, decreasing the costs of energy production. Urea is abundantly present in agricultural waste and in industrial and human wastewater. Besides generating hydrogen, this reaction provides a pathway to eliminate urea, which is a hazard in the environment and to people’s health. In this study, nanosheets of CuCo2O4 grown on nickel foam were synthesized as an electrocatalyst for urea oxidation to generate hydrogen as a green fuel. The synthesized electrocatalyst was characterized using X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy. The electroactivity of CuCo2O4 towards the oxidation of urea in alkaline solution was evaluated using electrochemical measurements. Nanosheets of CuCo2O4 grown on nickel foam required the potential of 1.36 V in 1 M KOH with 0.33 M urea to deliver a current density of 10 mA/cm2. The CuCo2O4 electrode was electrochemically stable for over 15 h of continuous measurements. The high catalytic activities for the hydrogen evolution reaction make the CuCo2O4 electrode a bifunctional catalyst and a promising electroactive material for hydrogen production. The two-electrode electrolyzer demanded a potential of 1.45 V, which was 260 mV less than that for the urea-free counterpart. Our study suggests that the CuCo2O4 electrode can be a promising material as an efficient UOR catalyst for fuel cells to generate hydrogen at a low cost.

Graphite Sheets as High-Performance Low-Cost Anodes for Microbial Fuel Cells Using Real Food Wastewater

2017 ◽  
Vol 40 (12) ◽  
pp. 2243-2250 ◽  
Author(s):  
Hend Omar Mohamed ◽  
Mohamed Obaid ◽  
Enas Taha Sayed ◽  
Mohammad Ali Abdelkareem ◽  
Mira Park ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
High Performance ◽  
Low Cost ◽  
Food Wastewater ◽  
Graphite Sheets

An ultra-thin, flexible, low-cost and scalable gas diffusion layer composed of carbon nanotubes for high-performance fuel cells

2020 ◽  
Vol 8 (12) ◽  
pp. 5986-5994 ◽  
Author(s):  
Jun Wei ◽  
Fandi Ning ◽  
Chuang Bai ◽  
Ting Zhang ◽  
Guanbin Lu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Diffusion Layer ◽  
High Performance ◽  
Proton Exchange Membrane ◽  
Low Cost ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
Proton Exchange ◽  
Membrane Electrode ◽  
Essential Components

A gas diffusion layer (GDL) is one of the essential components of a membrane electrode assembly (MEA), which is the core of proton exchange membrane fuel cells (PEMFCs).

scholarly journals Polyoxometallic chemistry towards all-in-one layered double hydroxides for boosting oxygen evolution electrocatalysis

2021 ◽  
Author(s):  
Zhengyang Cai ◽  
Ping Wang ◽  
Ya Yan ◽  
Jiangwei Zhang ◽  
Xianying Wang
Keyword(s):  
Oxygen Evolution ◽  
Layered Double Hydroxides ◽  
High Performance ◽  
Large Scale ◽  
Low Cost ◽  
Theoretical Data ◽  
Water Electrolysis ◽  
Active Species ◽  
Nickel Iron ◽  
Double Hydroxides

Abstract Nickel-iron based layered double hydroxides (NiFe LDH) have attracted tremendous research and industrial interests for oxygen evolution reaction electrocatalysis (OER). However, methodologies on simultaneous multi-regulations remain scarce. Herein, we report a versatile polyoxometallic acids (POMs) etching approach for ingeniously designing NiFe LDH, including morphological nanolayers tailoring, reconfiguration of Fe3+ and α-Ni(OH)2 active species, creating multiple vacancies of Ni, Fe and O and manufacturing interlayered POM polyanionic clusters as surface kinetic accelerators. Our experimental and theoretical data reveal that the key influencing factors are simultaneously controlled, resulting in synergistical enhancement with electrocatalytic OER activity of η10 = 206 mV, stability (negligible change of η500 for 24 h), and turnover frequency value (TOFFe, mol) of 2.03 s− 1. To elucidate the evolution, we derive an empirical formula to quantitatively identifying the key performance-determining factors, coinciding with the work and most of literature data. The expression offers an opportunity for first and fast reliability on materials screening. Moreover, the electrocatalyst is further produced on a large scale with low cost and high performance, demonstrating its feasibility of promising configuration of NiFe LDH-PMo12(+) ‖ Ni@NiFe LDH(-) for practical anion-exchange membrane (AEM)-electrode-stack cells water electrolysis.

Graphene–sponges as high-performance low-cost anodes for microbial fuel cells

2012 ◽  
Vol 5 (5) ◽  
pp. 6862 ◽  
Author(s):  
Xing Xie ◽  
Guihua Yu ◽  
Nian Liu ◽  
Zhenan Bao ◽  
Craig S. Criddle ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
High Performance ◽  
Low Cost

A high-performance electrocatalytic air cathode derived from aniline and iron for use in microbial fuel cells

RSC Advances ◽  
2014 ◽  
Vol 4 (25) ◽  
pp. 12789-12794 ◽  
Author(s):  
Xinhua Tang ◽  
Haoran Li ◽  
Weida Wang ◽  
Zhuwei Du ◽  
How Yong Ng
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Microbial Fuel Cells ◽  
High Performance ◽  
Low Cost ◽  
Air Cathode

A high-performance and low-cost catalyst derived from aniline and iron was synthesized for use as microbial fuel cell (MFC) air cathodes.

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