scholarly journals Active Site Identification in FeNC Catalysts and Their Assignment to the Oxygen Reduction Reaction Pathway by In Situ 57 Fe Mössbauer Spectroscopy

2021 ◽  
Vol 2 (2) ◽  
pp. 2000064 ◽  
Author(s):  
Lingmei Ni ◽  
Charlotte Gallenkamp ◽  
Stephen Paul ◽  
Markus Kübler ◽  
Pascal Theis ◽  
...  
Keyword(s):  
Mössbauer Spectroscopy ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Active Site ◽  
Mossbauer Spectroscopy ◽  
Reaction Pathway ◽  
Reduction Reaction ◽  
Mößbauer Spectroscopy ◽  
Site Identification

Investigation of the Active Site for the Oxygen Reduction Reaction on the Oxide Surface Using by In-Situ XAFS Method

2018 ◽  
Vol 85 (13) ◽  
pp. 865-872 ◽  
Author(s):  
Takahiro Saida ◽  
Shoko Hirano ◽  
Etsuko Niwa ◽  
Fumiaki Sato ◽  
Takahiro Maruyama
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Active Site ◽  
Reduction Reaction ◽  
Oxide Surface ◽  
In Situ Xafs

Carbon-Supported Spinel Nanoparticle MnCo2O4 as a Cathode Catalyst towards Oxygen Reduction Reaction in Dual-Chamber Microbial Fuel Cell

2015 ◽  
Vol 68 (6) ◽  
pp. 987 ◽  
Author(s):  
Dengping Hu ◽  
Guangyao Zhang ◽  
Juan Wang ◽  
Qin Zhong
Keyword(s):  
Carbon Black ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Microbial Fuel Cells ◽  
Coupling Effect ◽  
Reaction Pathway ◽  
Reduction Reaction ◽  
Cathode Catalyst ◽  
Dual Chamber

The poor kinetics of oxygen reduction reaction (ORR) in neutral media and ambient temperature limit the performance of microbial fuel cells (MFCs). So higher-performing, low-cost oxygen reduction catalysts play a key role in power output. Through direct nanoparticle nucleation and growth on carbon black, a nanocomposite of manganese cobaltite and carbon black (in situ-MnCo2O4/C) was synthesized via a facile hydrothermal method. Subsequently, the in situ-MnCo2O4/C samples were characterized. The results show that the MnCo2O4 nanoparticles with a crystalline spinel structure are well dispersed on carbon black. Electrochemical measurements reveal that in situ-MnCo2O4/C demonstrates excellent ORR catalytic activity, which may account for the synergetic coupling effect between MnCo2O4 and carbon black. The ORR on as-prepared in situ-MnCo2O4/C hybrid mainly favours a direct 4-electron reaction pathway in alkaline solution. Moreover, in situ-MnCo2O4/C was used as an alternative catalyst for ORR in dual-chamber MFC. The obtained maximum power density is 545 mW m–2, which is far higher than that of the plain cathode (Pmax = 214 mW m–2) and slightly lower than that of commercial Pt/C catalyst (Pmax = 689 mW m–2). This study implies that in situ-MnCo2O4/C nanocomposite is an efficient and cost-effective cathode catalyst for practical MFC application.

Facile synthesis of impurity-free iron single atom catalysts for highly efficient oxygen reduction reaction and active-site identification

2019 ◽  
Vol 9 (23) ◽  
pp. 6556-6560 ◽  
Author(s):  
Qian He ◽  
Yuying Meng ◽  
Hao Zhang ◽  
Ying Zhang ◽  
Hongyu Chen ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Active Site ◽  
Catalytic Performance ◽  
Reduction Reaction ◽  
Single Atom ◽  
Facile Synthesis ◽  
Free Iron ◽  
Highly Efficient ◽  
Site Identification

A precursor-dilution strategy is developed to prepare an impurity-free Fe single atom catalyst with superior oxygen reduction reaction catalytic performance.

Synthesis and Active Site Identification of Fe−N−C Single-Atom Catalysts for the Oxygen Reduction Reaction

2018 ◽  
Vol 6 (2) ◽  
pp. 304-315 ◽  
Author(s):  
Xin Wan ◽  
Weiqi Chen ◽  
Jiarui Yang ◽  
Mengchan Liu ◽  
Xiaofang Liu ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Active Site ◽  
Reduction Reaction ◽  
Single Atom ◽  
Site Identification

scholarly journals In Situ Probing of the Active Site Geometry of Ultrathin Nanowires for the Oxygen Reduction Reaction

2015 ◽  
Vol 137 (39) ◽  
pp. 12597-12609 ◽  
Author(s):  
Haiqing Liu ◽  
Wei An ◽  
Yuanyuan Li ◽  
Anatoly I. Frenkel ◽  
Kotaro Sasaki ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Active Site ◽  
Reduction Reaction
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