NbC Nanowire-Supported Pt Nanoparticles as a High Performance Catalyst for Methanol Electrooxidation

2013 ◽  
Vol 117 (27) ◽  
pp. 13770-13775 ◽  
Author(s):  
Zhen Qiu ◽  
Hui Huang ◽  
Jun Du ◽  
Tong Feng ◽  
Wenkui Zhang ◽  
...  
Keyword(s):  
High Performance ◽  
Pt Nanoparticles ◽  
Methanol Electrooxidation

Optical porous hollow-boxes assembled by SrSO4/TiO2/Pt nanoparticles for high performance of photocatalytic H2 evolution

Nano Energy ◽  
2019 ◽  
Vol 59 ◽  
pp. 129-137 ◽  
Author(s):  
Zhao Wang ◽  
Qi Yang ◽  
Wenlin Liu ◽  
Hao Ran ◽  
Cuiling Zhang ◽  
...  
Keyword(s):  
High Performance ◽  
Pt Nanoparticles ◽  
H2 Evolution ◽  
Photocatalytic H2 Evolution

scholarly journals Improvement of Catalytic Activity of Platinum Nanoparticles Decorated Carbon Graphene Composite on Oxygen Electroreduction for Fuel Cells

Processes ◽  
2019 ◽  
Vol 7 (9) ◽  
pp. 586 ◽  
Author(s):  
Halima Begum ◽  
Young-Bae Kim
Keyword(s):  
Catalytic Activity ◽  
Fuel Cells ◽  
Surface Area ◽  
High Performance ◽  
Pt Nanoparticles ◽  
Reduction Reaction ◽  
Graphene Sheets ◽  
Crossover Effect ◽  
Onset Potential ◽  
Monolayer Dispersion

High-performance platinum (Pt)-based catalyst development is crucially important for reducing high overpotential of sluggish oxygen reduction reaction (ORR) at Pt-based electrocatalysts, although the high cost and scarcity in nature of Pt are profoundly hampering the practical use of it in fuel cells. Thus, the enhancing activity of Pt-based electrocatalysts with minimal Pt-loading through alloy, core−shell or composite making has been implemented. This article deals with enhancing electrocatalytic activity on ORR of commercially available platinum/carbon (Pt/C) with graphene sheets through a simple composite making. The Pt/C with graphene sheets composite materials (denoted as Pt/Cx:G10−x) have been characterized by several instrumental measurements. It shows that the Pt nanoparticles (NPs) from the Pt/C have been transferred towards the π-conjugated systems of the graphene sheets with better monolayer dispersion. The optimized Pt/C8:G2 composite has higher specific surface area and better degree of graphitization with better dispersion of NPs. As a result, it shows not only stable electrochemical surface area but also enhanced ORR catalytic activity in respect to the onset potential, mass activity and electron transfer kinetics. As shown by the ORR, the Pt/C8:G2 composite is also better resistive to the alcohol crossover effect and more durable than the Pt/C.

scholarly journals Graphene Oxide Decorated Nanometal-Poly(Anilino-Dodecylbenzene Sulfonic Acid) for Application in High Performance Supercapacitors

Micromachines ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 115 ◽  
Author(s):  
Nomxolisi R. Dywili ◽  
Afroditi Ntziouni ◽  
Chinwe Ikpo ◽  
Miranda Ndipingwi ◽  
Ntuthuko W. Hlongwa ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
High Resolution ◽  
Specific Capacitance ◽  
Sulfonic Acid ◽  
High Performance ◽  
Pt Nanoparticles ◽  
Metal Nanoparticle ◽  
Vibration Band ◽  
Dodecylbenzene Sulfonic Acid

Graphene oxide (GO) decorated with silver (Ag), copper (Cu) or platinum (Pt) nanoparticles that are anchored on dodecylbenzene sulfonic acid (DBSA)-doped polyaniline (PANI) were prepared by a simple one-step method and applied as novel materials for high performance supercapacitors. High-resolution transmission electron microscopy (HRTEM) and high-resolution scanning electron microscopy (HRSEM) analyses revealed that a metal-decorated polymer matrix is embedded within the GO sheet. This caused the M/DBSA–PANI (M = Ag, Cu or Pt) particles to adsorb on the surface of the GO sheets, appearing as aggregated dark regions in the HRSEM images. The Fourier transform infrared (FTIR) spectroscopy studies revealed that GO was successfully produced and decorated with Ag, Cu or Pt nanoparticles anchored on DBSA–PANI. This was confirmed by the appearance of the GO signature epoxy C–O vibration band at 1040 cm−1 (which decreased upon the introduction of metal nanoparticle) and the PANI characteristic N–H stretching vibration band at 3144 cm−1 present only in the GO/M/DBSA–PANI systems. The composites were tested for their suitability as supercapacitor materials; and specific capacitance values of 206.4, 192.8 and 227.2 F·g−1 were determined for GO/Ag/DBSA–PANI, GO/Cu/DBSA–PANI and GO/Pt/DBSA–PANI, respectively. The GO/Pt/DBSA–PANI electrode exhibited the best specific capacitance value of the three electrodes and also had twice the specific capacitance value reported for Graphene/MnO2//ACN (113.5 F·g−1). This makes GO/Pt/DBSA–PANI a very promising organic supercapacitor material.

Using formic acid vapor as reducer to prepare Pt nanoparticles supported on carbon nanofiber mats for methanol electrooxidation

2014 ◽  
Vol 51 ◽  
pp. 86-89 ◽  
Author(s):  
Miaoyu Li ◽  
Gaoyi Han ◽  
Binsheng Yang ◽  
Yunzhen Chang ◽  
Yaoming Xiao ◽  
...  
Keyword(s):  
Formic Acid ◽  
Carbon Nanofiber ◽  
Pt Nanoparticles ◽  
Methanol Electrooxidation ◽  
Acid Vapor ◽  
Nanofiber Mats
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