scholarly journals One-Step Synthesized Pt-on-NiCo Nanostructures for Oxygen Reduction with High Activity and Long-Term Stability

2012 ◽  
Vol 2012 ◽  
pp. 1-9
Author(s):  
Qiang Qu ◽  
Ming Wen ◽  
Mingzhu Cheng ◽  
Anwei Zhu ◽  
Biao Kong ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
High Activity ◽  
Pt Nanoparticles ◽  
Electrochemical Surface Area ◽  
Step Method ◽  
Onset Potential ◽  
Term Stability ◽  
Long Term Stability ◽  
One Step

A novel particle-on-alloy nanomaterial has been designed and successfully synthesized for oxygen reduction (ORR) with high activity and long-term stability, in which well-isolated Pt nanoparticles are supported by amorphous NiCo nanoalloys. The Pt-on-NiCo nanostructures are prepared through the artificial active collodion membrane by one-step method, and experimental data reveals that Pt is isolated and spreads onto the amorphous NiCo nanosupport, and not only Pt but also Ni and Co are metallic in the Pt-on-NiCo nanostructures. The optimized Pt53-on-NiCo nanostructures show higher activities in both the onset potential and kinetic current density toward the ORR relative to the commercial Pt reference catalysts because the Pt-on-NiCo catalyst could lower theOHad, which is considered to inhibit the ORR toward water. Meanwhile, Pt-on-NiCo nanostructures exhibit relatively long-term stability with only ~8% loss in electrochemical surface area (ECSA) for Pt.

scholarly journals Wittichenite semiconductor of Cu3BiS3 films for efficient hydrogen evolution from solar driven photoelectrochemical water splitting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Dingwang Huang ◽  
Lintao Li ◽  
Kang Wang ◽  
Yan Li ◽  
Kuang Feng ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Low Cost ◽  
Solar Hydrogen ◽  
Onset Potential ◽  
Term Stability ◽  
Long Term Stability ◽  
Solar Water Splitting ◽  
Current Densities

AbstractA highly efficient, low-cost and environmentally friendly photocathode with long-term stability is the goal of practical solar hydrogen evolution applications. Here, we found that the Cu3BiS3 film-based photocathode meets the abovementioned requirements. The Cu3BiS3-based photocathode presents a remarkable onset potential over 0.9 VRHE with excellent photoelectrochemical current densities (~7 mA/cm2 under 0 VRHE) and appreciable 10-hour long-term stability in neutral water solutions. This high onset potential of the Cu3BiS3-based photocathode directly results in a good unbiased operating photocurrent of ~1.6 mA/cm2 assisted by the BiVO4 photoanode. A tandem device of Cu3BiS3-BiVO4 with an unbiased solar-to-hydrogen conversion efficiency of 2.04% is presented. This tandem device also presents high stability over 20 hours. Ultimately, a 5 × 5 cm2 large Cu3BiS3-BiVO4 tandem device module is fabricated for standalone overall solar water splitting with a long-term stability of 60 hours.

In situ construction of a poly-3,4-ethylenedioxythiophene skeleton on carbon nanotubes to improve long-term stability for oxygen reduction reaction

2020 ◽  
Vol 44 (16) ◽  
pp. 6435-6442
Author(s):  
Jing Li ◽  
Jinfu Ma ◽  
Hui Lu ◽  
Zhilin Sheng ◽  
Shaolin Yang ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Carbon Nanomaterials ◽  
High Surface ◽  
Reduction Reaction ◽  
Term Stability ◽  
Long Term Stability ◽  
Good Potential ◽  
Practical Performance

Although carbon nanomaterials show good potential as efficient electrocatalysts for oxygen reduction reaction (ORR), their inferior long-term stability due to their high surface energy resulting in compact restacking limits their practical performance.

Iron tungsten mixed composite as a robust oxygen evolution electrocatalyst

2019 ◽  
Vol 55 (73) ◽  
pp. 10944-10947 ◽  
Author(s):  
Chizhong Wang ◽  
Rong Wang ◽  
Yue Peng ◽  
Jianjun Chen ◽  
Junhua Li
Keyword(s):  
High Activity ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Term Stability ◽  
Long Term Stability

An iron tungsten mixed composite exhibited a high activity and a long-term stability for oxygen evolution reaction electrocatalysis.

One-Step Surgical Correction of Transverse and Anteroposterior Maxillary Deficiencies Using Wire Fixation. A New Approach and Long-Term Stability

2017 ◽  
Vol 75 (7) ◽  
pp. 1498-1513
Author(s):  
Max Domingues Pereira ◽  
Vivian Farfel ◽  
Gabriela Pereira Ribeiro Prado ◽  
Lydia Masako Ferreira
Keyword(s):  
Surgical Correction ◽  
New Approach ◽  
Term Stability ◽  
Long Term Stability ◽  
Wire Fixation ◽  
One Step

Au/Y-TiO2 Catalyst: High Activity and Long-Term Stability in CO Oxidation

ACS Catalysis ◽  
2011 ◽  
Vol 2 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Rodolfo Zanella ◽  
Vicente Rodríguez-González ◽  
Yamin Arzola ◽  
Albino Moreno-Rodriguez
Keyword(s):  
Co Oxidation ◽  
High Activity ◽  
Term Stability ◽  
Tio2 Catalyst ◽  
Long Term Stability

Dicobalt phosphide nanoparticles encased in boron and nitrogen co-doped graphitic layers as novel non-precious metal oxygen reduction electrocatalysts in alkaline media

2015 ◽  
Vol 51 (81) ◽  
pp. 15015-15018 ◽  
Author(s):  
Ce Han ◽  
Xiangjie Bo ◽  
Yufan Zhang ◽  
Mian Li ◽  
Aixia Wang ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Alkaline Solution ◽  
Precious Metal ◽  
Alkaline Media ◽  
Methanol Tolerance ◽  
Term Stability ◽  
Long Term Stability ◽  
Co Doped

Dicobalt phosphide nanoparticles encased in boron and nitrogen co-doped graphitic layers catalysts exhibited comparable ORR performance than the commercial Pt/C in alkaline solution with long term stability and excellent methanol tolerance.

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