Composition dependence of methanol oxidation activity in nickel–cobalt hydroxides and oxides: an optimization toward highly active electrodes

2015 ◽  
Vol 165 ◽  
pp. 56-66 ◽  
Author(s):  
Shengnan Sun ◽  
Zhichuan J. Xu
Keyword(s):  
Methanol Oxidation ◽  
Composition Dependence ◽  
Oxidation Activity ◽  
Highly Active ◽  
Nickel Cobalt ◽  
Cobalt Hydroxides

Nanoscale Structural and Chemical Segregation in Pt50Ru50 Electrocatalysts

2001 ◽  
Vol 7 (S2) ◽  
pp. 1112-1113
Author(s):  
Rhonda M. Stroud ◽  
Jeffrey W. Long ◽  
Karen E. Swider-Lyons ◽  
Debra R. Rolison
Keyword(s):  
Methanol Oxidation ◽  
Structural Heterogeneity ◽  
Oxidation Activity ◽  
Bimetallic Alloy ◽  
Transmission Electron ◽  
Chemical Segregation ◽  
High Fraction ◽  
Argon Mixture ◽  
Microscopy Techniques ◽  
Electron Energy Loss

To address how the chemical and structural heterogeneity of Pt50Ru50 nanoparticles affects methanol oxidation activity, we have employed an arsenal of transmission electron microscopy techniques (conventional bright field-imaging, selected area diffraction, atomic-resolution lattice imaging, electron-energy loss spectroscopy, and energy-dispersive x-ray spectroscopy) to characterize 2.5-nm particles in differing oxidation and hydration states. Our studies demonstrate that electrocatalysts containing a high fraction of Ru-rich hydrous oxide, as apposed to the anhydrous PtRu bimetallic alloy, have as much as 250x higher methanol oxidation activityThe nominally 2.5-nm Pt50Ru50 particles were studied in as-received, reduced and reoxidized forms. The reducing treatment consisted of 2 h at 100 °C in flowing 10% PL/argon mixture. For re-oxidation, the reduced particles were heated for 20 h at 100 °C in an H2O-saturated oxygen atmosphere. The particles were suspended in methanol, and pipetted onto holey-carboncoated Cu grids for TEM studies.

RuO2·xH2O Supported on Carbon Nanotubes as a Highly Active Catalyst for Methanol Oxidation

2008 ◽  
Vol 112 (31) ◽  
pp. 11875-11880 ◽  
Author(s):  
Hao Yu ◽  
Kai Zeng ◽  
Xiaobo Fu ◽  
Yan Zhang ◽  
Feng Peng ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Methanol Oxidation ◽  
Active Catalyst ◽  
Highly Active

Synergistic Cu@CoOx core-cage structure on carbon layers as highly active and durable electrocatalysts for methanol oxidation

2019 ◽  
Vol 244 ◽  
pp. 795-801 ◽  
Author(s):  
Yue Sun ◽  
Yunjie Zhou ◽  
Cheng Zhu ◽  
Wenjing Tu ◽  
Huibo Wang ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Cage Structure ◽  
Highly Active

Silicon Oxide-Encapsulated Platinum Thin Films as Highly Active Electrocatalysts for Carbon Monoxide and Methanol Oxidation

ACS Catalysis ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 11423-11434 ◽  
Author(s):  
Jacob E. Robinson ◽  
Natalie Y. Labrador ◽  
Han Chen ◽  
B. Edward Sartor ◽  
Daniel V. Esposito
Keyword(s):  
Thin Films ◽  
Carbon Monoxide ◽  
Methanol Oxidation ◽  
Silicon Oxide ◽  
Highly Active

Formation of PtRu alloy nanoparticle catalyst by radiolytic process assisted by addition of dl-tartaric acid and its enhanced methanol oxidation activity

2011 ◽  
Vol 13 (10) ◽  
pp. 5275-5287 ◽  
Author(s):  
Satoru Kageyama ◽  
Satoshi Seino ◽  
Takashi Nakagawa ◽  
Hiroaki Nitani ◽  
Koji Ueno ◽  
...  
Keyword(s):  
Tartaric Acid ◽  
Methanol Oxidation ◽  
Oxidation Activity ◽  
Radiolytic Process ◽  
Nanoparticle Catalyst
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