Co3O4-CuCoO2 Nanomesh: An Interface-Enhanced Substrate that Simultaneously Promotes CO Adsorption and O-2 Activation in H-2 Purification

Ding, Junfang1; Li, Liping1; Zheng, Haorui1; Zuo, Ying2; Wang, Xiyang1; Li, Huixia1; Chen, Shaoqing3; Zhang, Dan1; Xu, Xingliang1; Li, Guangshe1

2019-02-13

10.1021/acsami.8b19478

ACS Applied Materials & Interfaces   影响因子和分区

1944-8244

Nanomaterials are widely used as redox-type reaction catalysts, while reactant adsorption and O-2 activation are hardly to be promoted simultaneously, restricting their applications in many important catalytic fields such as preferential CO oxidation (CO-PROX) in H-2-rich stream. In this work, an interface-enhanced Co3O4-CuCoO2 nano mesh was initially synthesized by a hydrothermal process using aluminum powder as a sacrificial agent. This nanomesh is systematically characterized by powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, N-2 adsorption, X-ray photoelectron spectroscopy, UV-vis absorption spectroscopy, Raman spectroscopy, X-ray absorption near-edge spectroscopy, hydrogen temperature-programmed reduction, and oxygen temperature-programmed desorption. It is demonstrated that the nanomesh possesses high-density nanopores, enabling a large number of CO adsorption sites exposed to the surface. Meanwhile, electron transfer from O2- to Co3+/Co2+ and the weakened bonding strength of Co-O bond at surfaces promoted the oxygen activation and redox ability of Co3O4. When tested as a catalyst for CO-PROX, this nanomesh with an optimized pore structure and a surface electronic structure, exhibits a strikingly high catalytic oxidation activity at low temperatures as well as a broader operation temperature window (i.e., CO conversion >99.0%, 100-200 degrees C) in the CO selective oxidation reaction. The present finding should be highly useful in promoting the quest for better CO-PROX catalysts, a hot topic for proton exchange membrane fuel cells and automotive vehicles.

nanomesh CO adsorption O-2 activation synergistic effect CO-PROX

SCI ; EI

英语

其他

NSFC[21871106] ; NSFC[21771075] ; NSFC[21671077] ; NSFC[21571176]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000459221900051

AMER CHEMICAL SOC

20191006598928

Absorption spectroscopy ; Adsorption ; Catalyst activity ; Chemical activation ; Electronic structure ; Fuel cells ; High resolution transmission electron microscopy ; Oxidation ; Oxygen ; Pore structure ; Proton exchange membrane fuel cells (PEMFC) ; Scanning electron microscopy ; Temperature programmed desorption ; Ultraviolet spectroscopy ; X ray absorption ; X ray photoelectron spectroscopy

Fuel Cells:702.2 ; Electromagnetic Waves:711 ; Optical Devices and Systems:741.3 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Physical Properties of Gases, Liquids and Solids:931.2

Web of Science

1.Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Jilin, Peoples R China
2.Shanxi Univ, Sci Instrument Ctr, Taiyuan 030006, Shanxi, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

Ding, Junfang,Li, Liping,Zheng, Haorui,et al. Co3O4-CuCoO2 Nanomesh: An Interface-Enhanced Substrate that Simultaneously Promotes CO Adsorption and O-2 Activation in H-2 Purification[J]. ACS Applied Materials & Interfaces,2019,11(6):6042-6053.

Ding, Junfang.,Li, Liping.,Zheng, Haorui.,Zuo, Ying.,Wang, Xiyang.,...&Li, Guangshe.(2019).Co3O4-CuCoO2 Nanomesh: An Interface-Enhanced Substrate that Simultaneously Promotes CO Adsorption and O-2 Activation in H-2 Purification.ACS Applied Materials & Interfaces,11(6),6042-6053.

Ding, Junfang,et al."Co3O4-CuCoO2 Nanomesh: An Interface-Enhanced Substrate that Simultaneously Promotes CO Adsorption and O-2 Activation in H-2 Purification".ACS Applied Materials & Interfaces 11.6(2019):6042-6053.