ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 30    No. 6    June 2020

Boosting ethanol oxidation over nickel oxide through construction of quasi-one-dimensional morphology and hierarchically porous structure
Jing ZHAN1,2, Ze-lin MIAO1, Meng CAI1, Qi-hou LI1,2
(1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;
2. National Engineering Laboratory for High Efficiency Recovery of Refractory Nonferrous Metals Resources, Changsha 410083, China
)
Abstract: Quasi-one-dimensional NiO with a hierarchically porous structure was synthesized through a facile coordination-precipitation method with the coupling effect of ammonia and a post-calcination treatment. The electrocatalytic properties of NiO fibers for the oxidation of ethanol were compared with those of NiO spheres. The results show that the fibrous NiO possesses a larger specific surface area of 140.153 m2/g and a lower electrical resistivity of 4.5×105 Ω·m, leading to an impressively superior electrocatalytic activity to spherical NiO for ethanol oxidation in alkaline media. The current decay on fibrous NiO at 0.6 V in 100-900 s was 0.00003%, which is much lower than that of spherical NiO, indicating its better stability. The unique morphology and hierarchically porous structure give the fibrous NiO great potential to be used as an anodic electrocatalyst for direct ethanol fuel cells.
Key words: hierarchically porous structure; nickel oxide; ethanol oxidation; quasi-one-dimensional morphology
Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
Managed by Central South University (CSU) 湘ICP备09001153号