Sol - gel synthesis, structural characterization and bifunctional catalytic activity of nanocrystalline delafossite CuGaO2 particles

被引：54

作者：

Ahmed, Jahangeer ^{[1
]}

Poltavets, Viktor V. ^{[2
,3
]}

Prakash, Jai ^{[4
]}

Alshehri, Saad M. ^{[1
]}

Ahamad, Tansir ^{[1
]}

机构：

[1] King Saud Univ, Dept Chem, Coll Sci, Riyadh 11451, Saudi Arabia

[2] Univ New Orleans, Dept Chem, New Orleans, LA 70148 USA

[3] Univ New Orleans, Adv Mat Res Inst, New Orleans, LA 70148 USA

[4] Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 688卷

关键词：

Sol - gel synthesis; CuGaO2; Nanoparticles; Bifunctional catalyst; P-TYPE SEMICONDUCTORS; ELECTRONIC-STRUCTURE; NANOPARTICLES; CELLS; SIZE; HYDROGEN; BEHAVIOR; OXIDES; FILMS; ANODE;

D O I：

10.1016/j.jallcom.2016.07.017

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nanoparticles of CuGaO2 delafossite were successfully synthesized from the sol - gel process by controlling the atmospheric conditions at 850 degrees C. The average size of CuGaO2 nanoparticles of similar to 40 nm was determined by transmission electron microscopy. Note that the thermodynamically stable conditions for CuGaO2 delafossite synthesis are 1100 degrees C and 1200 degrees C in nitrogen and air atmosphere, respectively, while our methodology stabilizes the CuGaO2 particles in the nano-metric region at low temperature (i.e. 850 degrees C). Moreover, delafossites CuGaO2 nanoparticles show very interesting bifunctional catalytic activity in the electrolysis of water with O-2 and H-2 generation at anodic and cathodic potentials respectively. The current densities of CuGaO2 nanoparticles as the bifunctional catalysts were found to be 15 mA/cm(2) and 18 mA/cm(2) for H-2 and O-2 generation, respectively, using 0.5 M KOH solution as an electrolyte versus Ag/AgCl electrode. (C) 2016 Published by Elsevier B.V.

引用

页码：1157 / 1161

页数：5