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Mechanism of Oxygen Reduction Reaction
2021This chapter describes the mechanism and kinetics of oxygen reduction. Therefore, the adsorption of O2 on transition metals will be discussed in detail below. The adsorption of oxygen molecules on the surface of the catalyst is complicated. It not only has the associative adsorption and dissociative adsorption adsorbed in molecular form but also the ...
Zuzhen Zhao, Pei Kang Shen
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2020
Polymer electrolyte membrane fuel cells (PEMFCs) and metal air batteries are considered green and efficient electrochemical energy devices and both include reduction of oxygen at cathode during the working of device. Due to the sluggish reaction kinetics of ORR, it is considered the performance limiting factor and to cope with this issue scientists are
Rizwan Haider +2 more
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Polymer electrolyte membrane fuel cells (PEMFCs) and metal air batteries are considered green and efficient electrochemical energy devices and both include reduction of oxygen at cathode during the working of device. Due to the sluggish reaction kinetics of ORR, it is considered the performance limiting factor and to cope with this issue scientists are
Rizwan Haider +2 more
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The Measurements of the Oxygen Reduction Reaction
2021The oxygen reduction reaction is a typical electrocatalytic reaction, which is very sensitive to the surface state of the electrode and the type of adsorbate, and is the object of many basic researches. In this chapter, we mainly start from the oxygen reduction reaction mechanism, discuss the measurement technology of the oxygen reduction reaction in ...
Juhong Cheng, Xiaojun Lin, Pei Kang Shen
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The oxygen reduction reaction on [NiFe] hydrogenases
Physical Chemistry Chemical Physics, 2018Oxygen tolerance capacity is critical for hydrogen oxidation/evolution catalysts.
Siyao Qiu +3 more
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Electrochemical Oxygen Reduction Reaction
2014In this chapter, the fundamentals of oxygen reduction reaction (ORR) including thermodynamics and electrode kinetics are presented. The ORR kinetics including reaction mechanisms catalyzed by different electrode materials and catalysts including Pt, Pt alloys, carbon materials, and nonnoble metal catalysts are discussed based on the literature in terms
Si, Fengzhan +7 more
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Metal-Free Catalysts for Oxygen Reduction Reaction
Chemical Reviews, 2015The rising global energy demand and environmental impact of traditional energy resources pose serious challenges to human health, energy security, and environmental protection. One promising solution is fuel cell technology, which provides clean and sustainable power.
Dai, Liming +4 more
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Hierarchical Nanostructured Electrocatalysts for Oxygen Reduction Reaction
Journal of Nanoscience and Nanotechnology, 2020Hierarchical nanostructured materials, which possess the porous structure of multiscale porosities on different pore diameters from micro-, meso- to macropores based on International Union of Pure and Applied Chemistry, are much desired to present the synergistic attractive advantages of each scale of hierarchical pores in the development of catalysis,
Zihan, Meng +3 more
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Carbon-Free Electrocatalyst for Oxygen Reduction and Oxygen Evolution Reactions
ACS Applied Materials & Interfaces, 2015A nanoporous Ag-embedded SnO2 thin film was fabricated by anodic treatment of electrodeposited Ag-Sn alloy layers. The ordered nanoporous structure formed by anodization played a key role in enhancing the electrocatalytic performance of the Ag-embedded SnO2 layer in several ways: (1) the roughness factor of the thin film is greatly increased from 23 in
Yang, Yang +6 more
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Electrocatalytic Oxygen Reduction Reaction
2008Oxygen (O2) is the most abundant element in the Earth’s crust. The oxygen reduction reaction (ORR) is also the most important reaction in life processes such as biological respiration, and in energy converting systems such as fuel cells. ORR in aqueous solutions occurs mainly by two pathways: the direct 4-electron reduction pathway from O2 to H2O, and ...
Chaojie Song, Jiujun Zhang
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Measuring oxygen reduction/evolution reactions on the nanoscale
Nature Chemistry, 2011The efficiency of fuel cells and metal-air batteries is significantly limited by the activation of oxygen reduction and evolution reactions. Despite the well-recognized role of oxygen reaction kinetics on the viability of energy technologies, the governing mechanisms remain elusive and until now have been addressable only by macroscopic studies.
Kumar, Amit +4 more
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