Self-assembled CeO2 on carbon nanotubes supported Au nanoclusters as superior electrocatalysts for glycerol oxidation reaction of fuel cells

Mixed layered WO3/ZrO2 films (with and without rhodium) as active supports for PtRu nanoparticles: enhancement of oxidation of ethanol

“…Among metal oxide supports (for noble metal, single or alloyed, nanoparticles), the nanostructured oxides of tungsten [8][9][10][11][12][13], titanium [8,[13][14][15][16][17], zirconium [18][19][20][21][22][23], cerium [24][25][26] and vanadium [27] were successfully utilized for electrocatalytic oxidations of small organic molecules including alcohols. Some of those oxides exhibited desired oxidation states, generated active surface oxo-species leading to better utilization of noble metal catalytic sites, induced changes in their electronic nature, increased the electrochemically active surface area or even decreased of the poisoning effects [3].…”

Active sites contribution from nanostructured interface of palladium and cerium oxide with enhanced catalytic performance for alcohols oxidation in alkaline solution

“…From the above physical characterization and electrochemical measurements, we can see that the introduction of cerium oxide into Pd/C system greatly increased the catalytic activity and stability for alcohols oxidation. Actually the catalytic performance origin of Pd-cerium oxide system was quite complex, it refers to the several factors, e.g., catalyst dispersion, particle size, electronic effect, effect of oxygen vacancies and state of cerium and discussions in details can be seen in some previous reports [29,30] . Anyway, the origin of the performance improvement is absolutely attributed to the co-action of Pd and CeO x in the catalyst system as each single component cannot guarantee the high catalyst performances.…”

“…Because cerium oxide has multi-valences that can provide enough oxygen-containing species during the electrochemical oxidation process, it was thought as an efficient assistant-catalyst in alcohols oxidation. Though the effect of fabrication approaches was intensively studied and the promotion effect of oxide was evident, probing the promotion effect in depth is still going on due to the complicated effect in this catalyst system that involves the metal oxide state, surface compositions, electronic effect and so on [29,30] . Herein, back to our concerns, there is no active sites evaluation in the catalyst characterization or even no relevant reports to disclose the active sites contribution to catalytic performance.…”

Strategies to tune the selectivity of gold for glycerol electro-oxidation

“…MWCNT-COOH also possessed a higher electrochemically active surface area (EASA) than MWCNTS-SO3H. [101] San's and Shen's groups made use of the intrinsic properties of these carbon supports to immobilize CeO2 [102] nanoclusters onto MWCNTS (CeO2-MWCNTS) [103] and graphene nanosheets (CeO2-GNS) [104] respectively. Immobilization helped stabilize the CeO2 nanoclusters which have a tendency to agglomerate during preparation [105] and when subjected to electrochemical conditions [106] .…”