scholarly journals Palladium nanoparticles loaded on nitrogen and boron dual-doped single-wall carbon nanohorns with high electrocatalytic activity in the oxygen reduction reaction

RSC Advances ◽  
2018 ◽  
Vol 8 (59) ◽  
pp. 33688-33694 ◽  
Author(s):  
Xueyou Tan ◽  
Jinxuan Zhang ◽  
Xiaohui Wu ◽  
Yuanyuan Wang ◽  
Meixian Li ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Electrocatalytic Activity ◽  
Palladium Nanoparticles ◽  
Reduction Reaction ◽  
Step Method ◽  
Single Wall Carbon ◽  
Carbon Nanohorns ◽  
One Step ◽  
Single Wall Carbon Nanohorns

Palladium nanoparticles with a diameter of 2–4 nm loaded on nitrogen and boron dual-doped single-wall carbon nanohorns (Pd-NBCNHs) are prepared via one-step method and their electrocatalytic activities are studied for the oxygen reduction reaction.

scholarly journals RuSe Electrocatalysts and Single Wall Carbon Nanohorns Supports for the Oxygen Reduction Reaction

2015 ◽  
Vol 12 (2) ◽  
Author(s):  
Katarzyna Morawa Eblagon ◽  
Lúcia Brandão
Keyword(s):  
Particle Size ◽  
Carbon Black ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Type Structure ◽  
Single Wall Carbon ◽  
Carbon Nanohorns ◽  
Single Wall Carbon Nanohorns

Selenium modified ruthenium electrocatalysts supported on carbon black were synthesized using NaBH4 reduction of the metal precursor. Prepared Ru/C electrocatalysts showed high dispersion and very small averaged particle size. These Ru/C electrocatalysts were subsequently modified with Se following two procedures: (a) preformed Ru/carbon catalyst was mixed with SeO2 in xylene and reduced in H2 and (b) Ru metal precursor was mixed with SeO2 followed by reduction with NaBH4. The XRD patterns indicate that a pyrite-type structure was obtained at higher annealing temperatures, regardless of the Ru:Se molar ratio used in the preparation step. A pyrite-type structure also emerged in samples that were not calcined; however, in this case, the pyrite-type structure was only prominent for samples with higher Ru:Se ratios. The characterization of the RuSe/C electrocatalysts suggested that the Se in noncalcined samples was present mainly as an amorphous skin. Preliminary study of activity toward oxygen reduction reaction (ORR) using electrocatalysts with a Ru:Se ratio of 1:0.7 indicated that annealing after modification with Se had a detrimental effect on their activity. This result could be related to the increased particle size of crystalline RuSe2 in heat-treated samples. Higher activity of not annealed RuSe/C catalysts could also be a result of the structure containing amorphous Se skin on the Ru crystal. The electrode obtained using not calcined RuSe showed a very promising performance with a slightly lower activity and higher overpotential in comparison with a commercial Pt/C electrode. Single wall carbon nanohorns (SWNH) were considered for application as ORR electrocatalysts' supports. The characterization of SWNH was carried out regarding their tolerance toward strong catalyzed corrosion conditions. Tests indicated that SWNH have a three times higher electrochemical surface area (ESA) loss than carbon black or Pt commercial electrodes.

One-step fabrication of bimetallic PtNi mesoporous nanospheres as an efficient catalyst for the oxygen reduction reaction

Nanoscale ◽  
2018 ◽  
Vol 10 (34) ◽  
pp. 16087-16093 ◽  
Author(s):  
Hongjing Wang ◽  
Hongjie Yu ◽  
Shuli Yin ◽  
Yinghao Li ◽  
Hairong Xue ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Active Catalyst ◽  
Reduction Reaction ◽  
Step Method ◽  
Efficient Catalyst ◽  
One Step

PtNi mesoporous nanospheres are fabricated by a one-step method in aqueous solution and used as an active catalyst for the oxygen reduction reaction.

Influence of nitrogen precursors on the structure, composition, and oxygen reduction reaction performance of dual heteroatom doped carbon nanohorns

RSC Advances ◽  
2016 ◽  
Vol 6 (68) ◽  
pp. 63730-63735 ◽  
Author(s):  
Wu Xiaohui ◽  
Liu Lu ◽  
Tang Pei ◽  
Li Meixian ◽  
Shi Zujin
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Electrocatalytic Activity ◽  
Reduction Reaction ◽  
Carbon Nanohorns ◽  
N Sources ◽  
Reaction Performance

The different N-sources used in the synthesis would cause different ways the doped N atoms interact with B or P dopants, and result in the enhanced or declined electrocatalytic activity of dual-doped carbon nanohorns in oxygen reduction reaction.

Direct fabrication of bimetallic AuPt nanobrick spherical nanoarchitectonics for the oxygen reduction reaction

2019 ◽  
Vol 43 (24) ◽  
pp. 9628-9633 ◽  
Author(s):  
Alam Venugopal Narendra Kumar ◽  
Shuli Yin ◽  
Ziqiang Wang ◽  
Xiaoqian Qian ◽  
Dandan Yang ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Step Method ◽  
Direct Fabrication ◽  
One Step ◽  
Method Show

Bimetallic AuPt nanobrick spherical nanoarchitectonics synthesized via a one-step method show excellent ORR performance.

Direct fabrication of tri-metallic PtPdCu tripods with branched exteriors for the oxygen reduction reaction

2018 ◽  
Vol 6 (18) ◽  
pp. 8662-8668 ◽  
Author(s):  
Hongjing Wang ◽  
Shuli Yin ◽  
You Xu ◽  
Xiaonian Li ◽  
Abdulmohsen Ali Alshehri ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Step Method ◽  
Direct Fabrication ◽  
One Step

A one-step method is developed for the fabrication of PtPdCu tripods with branched exteriors for the oxygen reduction reaction.

Preparation and Electrochemical Properties of Pt/Mesoporous-C for Oxygen Reduction Reaction: Effect of Carbonation Temperature

2011 ◽  
Vol 306-307 ◽  
pp. 155-158
Author(s):  
Chia Ying Hsieh ◽  
Yi Shiuan Huang ◽  
Jing Shan Do
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Specific Activity ◽  
Active Agent ◽  
Reduction Reaction ◽  
Step Method ◽  
Pore Characteristics ◽  
Silicon Source ◽  
One Step ◽  
Mass Activity

The mesoporous carbon (MC) synthesized by a one-step method with tetraethyl ortho- silicate (TEOS) as silicon source, sucrose as carbon source and phosphoric acid as active agent, respectively, is used as the support to prepare Pt/MC electrocatalysts. The pore characteristics and the graphitic extend of MC can be adjusted by controlling the carbonation temperature (Tc). The maximum surface area of home-made MC is confirmed and analyzed by BET to be 860.20 m2g-1 with Tc = 900 °C, and the main pore size of MC is 8.70 nm. The maximum mass activity (MA) and specific activity (SA) of the oxygen reduction reaction (ORR) on Pt/MC (P/Si = 0.5, Tc = 900 °C) are experimentally found to be 15.54 A g-1 and 18.05 mA cm-2, respectively.

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