Codoping-Induced, Rhombus-Shaped Co3O4 Nanosheets as an Active Electrode Material for Oxygen Evolution

Zhang, Xiaoli1,2; Zhang, Jinbao3; Wang, Kai1,2

2015-10-07

10.1021/acsami.5b05149

ACS Applied Materials & Interfaces   影响因子和分区

1944-8244

Nanostructured Co3O4 doped with Zn2+, Ni2+, and both were directly grown on an ITO substrate by an easily available hydrothermal method. The doped Co3O4 showed a unique structural morphology evolution upon controlling the doping elements and the doping ratio of the cations. For the codoped samples, the novel rhombus-shaped Co3O4 nanosheets doped with Zn2+ and Ni2+ (concentration ratio of 1:2) exhibited the optimal electrocatalytic performance. The sample showed a current density of 165 mA cm(-2) at 1.75 V, approximately 1.6 and 4 times higher than that of samples doped with Zn2+ and Ni2+ at a concentration ratio of 1:1 and 1:3. The unique architecture and its corresponding modified physical properties, such as high active-site density created by codoping, large structural porosity, and high roughness, are together responsible to its superior performance. For codoped Co3O4 nanostructures, Zn2+ facilitates the creation of Co cations in their high oxidation state as active centers, while Ni2+ contributed to the new active sites with lower activation energy. The synergistic effect of Zn2+ and Ni2+ doping can explain the improved physicochemical properties of codoped Co3O4 nanostructures.

water splitting oxygen evolution reaction electrocatalysis codoped Co3O4 nanostructures

SCI ; EI

英语

第一 ; 通讯

SUSTC Foundation[FRG-SUSTC1501A-48]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000362628900018

AMER CHEMICAL SOC

20154201392758

Activation energy ; Electrocatalysis ; Morphology ; Nanosheets ; Nanostructures ; Nickel compounds ; Oxygen ; Physicochemical properties ; Positive ions ; Zinc compounds

Nanotechnology:761 ; Electrochemistry:801.4.1 ; Chemical Products Generally:804 ; Solid State Physics:933 ; Materials Science:951

Web of Science

1.South Univ Sci & Technol China, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
2.SUSTC, Shenzhen Key Lab Generat Semicond Devices 3, Shenzhen 518055, Peoples R China
3.Uppsala Univ, Dept Chem, Ctr Mol Devices, Phys Chem,Angstrom Lab, SE-75120 Uppsala, Sweden

Zhang, Xiaoli,Zhang, Jinbao,Wang, Kai. Codoping-Induced, Rhombus-Shaped Co3O4 Nanosheets as an Active Electrode Material for Oxygen Evolution[J]. ACS Applied Materials & Interfaces,2015,7(39):21745-21750.

Zhang, Xiaoli,Zhang, Jinbao,&Wang, Kai.(2015).Codoping-Induced, Rhombus-Shaped Co3O4 Nanosheets as an Active Electrode Material for Oxygen Evolution.ACS Applied Materials & Interfaces,7(39),21745-21750.

Zhang, Xiaoli,et al."Codoping-Induced, Rhombus-Shaped Co3O4 Nanosheets as an Active Electrode Material for Oxygen Evolution".ACS Applied Materials & Interfaces 7.39(2015):21745-21750.