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.

PtCu bimetallic alloy nanotubes with porous surface for oxygen reduction reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (73) ◽  
pp. 69233-69238 ◽  
Author(s):  
Shaofang Fu ◽  
Chengzhou Zhu ◽  
Qiurong Shi ◽  
Dan Du ◽  
Yuehe Lin
Keyword(s):  
Aqueous Solution ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Porous Surface ◽  
Bimetallic Alloy ◽  
Electrocatalytic Performance

PtCu bimetallic alloy nanotubes with porous surface were synthesized in aqueous solution using Te NWs as templates. The nanotubes with optimized composition present enhanced electrocatalytic performance for oxygen reduction reaction.

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