Bimetallic alloy nanowires and nanosponges: A comparative study of peroxidase mimetics and as enhanced catalysts for oxygen reduction reaction

2013 ◽  
Vol 36 ◽  
pp. 22-25 ◽  
Author(s):  
Zhijun Zhu ◽  
Yanling Zhai ◽  
Chengzhou Zhu ◽  
Zhenxin Wang ◽  
Shaojun Dong
Keyword(s):  
Comparative Study ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Bimetallic Alloy ◽  
Alloy Nanowires

scholarly journals One-Nanometer-Thick Pt3Ni Bimetallic Alloy Nanowires Advanced Oxygen Reduction Reaction: Integrating Multiple Advantages into One Catalyst

ACS Catalysis ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 4488-4494 ◽  
Author(s):  
Mingxing Gong ◽  
Zhiping Deng ◽  
Dongdong Xiao ◽  
Lili Han ◽  
Tonghui Zhao ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Bimetallic Alloy ◽  
Alloy Nanowires

Enhanced electrocatalytic performance of ultrathin PtNi alloy nanowires for oxygen reduction reaction

2017 ◽  
Vol 11 (3) ◽  
pp. 260-267 ◽  
Author(s):  
Hongjie Zhang ◽  
Yachao Zeng ◽  
Longsheng Cao ◽  
Limeng Yang ◽  
Dahui Fang ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Electrocatalytic Performance ◽  
Alloy Nanowires ◽  
Ptni Alloy

Enhanced electrocatalytic activities of three dimensional PtCu@Pt bimetallic alloy nanofoams for oxygen reduction reaction

2016 ◽  
Vol 6 (13) ◽  
pp. 5052-5059 ◽  
Author(s):  
Shaofang Fu ◽  
Chengzhou Zhu ◽  
Qiurong Shi ◽  
Dan Du ◽  
Yuehe Lin
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Three Dimensional ◽  
Reduction Reaction ◽  
Bimetallic Alloy

Three dimensional PtCu@Pt bimetallic alloy nanofoams show enhanced electrocatalytic activities for oxygen reduction reaction.

scholarly journals Galvanic Exchange as a Novel Method for Carbon Nitride Supported CoAg Catalyst Synthesis for Oxygen Reduction and Carbon Dioxide Conversion

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 860 ◽  
Author(s):  
Roshan Nazir ◽  
Anand Kumar ◽  
Sardar Ali ◽  
Mohammed Ali Saleh Saad ◽  
Mohammed J. Al-Marri
Keyword(s):  
Electron Microscopy ◽  
Carbon Dioxide ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Carbon Nitride ◽  
Reduction Reaction ◽  
Partial Replacement ◽  
Carbon Dioxide Conversion ◽  
X Ray ◽  
Bimetallic Alloy

A bimetallic alloy of CoAg nanoparticles (NPs) on a carbon nitride (CN) surface was synthesized using a galvanic exchange process for the oxygen reduction reaction (ORR) and carbon dioxide electrocatalytic conversion. The reduction potential of cobalt is ([Co2+(aq) + 2e− → Co(s)], −0.28 eV) is smaller than that of Ag ([Ag+(aq) + e− → Ag(s)], 0.80 eV), which makes Co(0) to be easily replaceable by Ag+ ions. Initially, Co NPs (nanoparticles) were synthesized on a CN surface via adsorbing the Co2+ precursor on the surface of CN and subsequently reducing them with NaBH4 to obtain Co/CN NP. The Co NPs on the surface of CN were then subjected to galvanic exchange, where the sacrificial Co atoms were replaced by Ag atoms. As the process takes place on a solid surface, only the partial replacement of Co by Ag was possible generating CoAg/CN NPs. Synthesized CoAg/CN bimetallic alloy were characterized using different techniques such as powder x-ray diffraction (PXRD), x-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and electron diffraction spectroscopy (EDS) to confirm the product. Both the catalysts, Co/CN and CoAg/CN, were evaluated for oxygen reduction reaction in 1M KOH solution and carbon dioxide conversion in 0.5 M KHCO3. In the case of ORR, the CoAg/CN was found to be an efficient electrocatalyst with the onset potential of 0.93 V, which is comparable to commercially available Pt/C having Eonset at 0.91 V. In the electrocatalytic conversion of CO2, the CoAg/CN showed better performance than Co/CN. The cathodic current decreased dramatically below −0.9V versus Ag/AgCl indicating the high conversion of CO2.

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