Results 31 to 40 of about 509,240 (310)

Bio-inspired nanocatalysts for the oxygen reduction reaction [PDF]

Nature Communications, 2013
Electrochemical conversions at fuel cell electrodes are complex processes. In particular, the oxygen reduction reaction has substantial overpotential limiting the electrical power output efficiency. Effective and inexpensive catalytic interfaces are therefore essential for increased performance.
Doris, Grumelli, Benjamin, Wurster, Sebastian, Stepanow, Klaus, Kern   +3 more
openaire   +2 more sources

Manipulating the oxygen reduction reaction pathway on Pt-coordinated motifs

Nature Communications, 2022
Controlling O2 reduction pathways can help optimize catalytic activity and product selectivity. Here the authors report facile manipulation of 2e‒ /4e‒ pathways on Pt-coordinated motifs by varying the Pt site density or the coordination environment.
Jiajun Zhao, Cehuang Fu, Ke Ye, Zheng Liang, Fangling Jiang, Shuiyun Shen, Xiaoran Zhao, Lu Ma, Zulipiya Shadike, Xiaoming Wang, Junliang Zhang, Kun Jiang   +11 more
doaj   +1 more source

Biomass-Derived Carbon Aerogels for ORR/OER Bifunctional Oxygen Electrodes

Nanomaterials, 2023
The oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are crucial electrochemical reactions that play vital roles in energy conversion and storage technologies, such as fuel cells and metal–air batteries.
Yue Jiao, Ke Xu, Huining Xiao, Changtong Mei, Jian Li   +4 more
doaj   +1 more source

A Bifunctional Electrocatalyst for Oxygen Evolution and Oxygen Reduction Reactions in Water [PDF]

Angewandte Chemie International Edition, 2016
AbstractOxygen reduction and water oxidation are two key processes in fuel cell applications. The oxidation of water to dioxygen is a 4 H+/4 e− process, while oxygen can be fully reduced to water by a 4 e−/4 H+ process or partially reduced by fewer electrons to reactive oxygen species such as H2O2 and O2−.
Schofberger, W., Faschinger, F., Chattopadhyay, S., Bhakta, S., Mondal, B., Elemans, J.A.A.W., Mullegger, S., Tebi, S., Koch, R., Klappenberger, F., Paszkiewicz, M., Barth, J.V., Rauls, E., Aldahhak, H., Schmidt, W.G., Dey, Abhishek   +15 more
openaire   +5 more sources

Nitrogen Doped Carbon Wrapped Fe3O4 as an Efficient Bifunctional Oxygen Electrocatalyst

International Journal of Electrochemical Science, 2017
The development of green energy conversion devices such as metal air battery relies on the use of efficient reversible oxygen electrocatalyst. Commonly used precious metal catalyst could not support the large scale application of these devices due to ...
Zhijia Zhang, Qiao Shu, Chan Chen, Tianci Xiao, Zhiyi Hu, Shuaicheng Wu, Junsheng Li   +6 more
doaj   +1 more source

Recent Advances in Oxygen Electrocatalysts Based on Perovskite Oxides

Nanomaterials, 2019
Electrochemical oxygen reduction and oxygen evolution are two key processes that limit the efficiency of important energy conversion devices such as metal−air battery and electrolysis.
Jun Xu, Chan Chen, Zhifei Han, Yuanyuan Yang, Junsheng Li, Qibo Deng   +5 more
doaj   +1 more source

Ultrasonic synthesis of Mn-Ni-Fe tri-metallic oxide anchored on polymer-grafted conductive carbon for rechargeable zinc-air battery

Ultrasonics Sonochemistry, 2021
As a promising electrochemical energy device, a rechargeable zinc-air battery (RZAB) requires cost-effective cathode catalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER).
Bolin Jin, Peiyao Bai, Qiang Ru, Weiqi Liu, Huifen Wang, Lang Xu   +5 more
doaj   +1 more source

A self‐powered system to electrochemically generate ammonia driven by palladium single atom electrocatalyst

SusMat
The utilization of single atoms (SAs) as trifunctional electrocatalyst for nitrogen reduction, oxygen reduction, and oxygen evolution reactions (NRR, ORR, and OER) is still a formidable challenge.
Hao Hu, Shuyuan Pan, Zhiyong Ma, Kaiyi Liu, Yi Li, Haifeng Bao, Chengwei Deng, Fang Luo, Zehui Yang   +8 more
doaj   +1 more source

Preparation and Characterization of Multi-Doped Porous Carbon Nanofibers from Carbonization in Different Atmospheres and Their Oxygen Electrocatalytic Properties Research

Nanomaterials, 2022
Recently, electrocatalysts for oxygen reduction reaction (ORR) as well as oxygen evolution reaction (OER) hinged on electrospun nanofiber composites have attracted wide research attention.
Tao Wang, Oluwafunmilola Ola, Malcom Frimpong Dapaah, Yuhao Lu, Qijian Niu, Liang Cheng, Nannan Wang, Yanqiu Zhu   +7 more
doaj   +1 more source

Carbon for the oxygen reduction reaction: A defect mechanism

, 2015
We demonstrate a new defect mechanism of carbons for the oxygen reduction reaction (ORR). It is predicted by the first principles calculations that a type of 585 defect on graphene (G585) is more effective than N-doping for the ORR, and our experimental ...
Yao, Xiangdong, Chen, Zhigang, Zhao, Huanyu, Sun, Chenghua, Yan, Xuecheng, Zhu, Guangshan, Jin, Zhao, Wang, Da-Wei   +7 more
core   +1 more source