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Constructing bimetal-complex based hydrogen-bonded framework for highly efficient electrocatalytic water splitting
- Source :
- Applied Catalysis B: Environmental. 258:117973
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- We present herein a new concept of hydrogen-bonded organic framework (HOF) material for highly effective electrocatalysis of overall water splitting. This HOF material, namely HOF-Co, was synthesized based on very cheap raw materials. Crystallizing bimetallic HOFs of HOF-CoxFe1-x on nickel foam (NF) can be also easily obtained via a step-by-step approach. In 1 M KOH, HOF-Co0.5Fe0.5 on the NF enables both excellent oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performance, thus leading to highly effective electrocatalysis of water splitting with a cell voltage of just 1.63 V at 10 mA cm−2. The vaule is comparable to the commercial Pt/C//IrO2 (1.59 V) and other established outstanding electrocatalysts. The mechanism, as evidenced by Density Functional Theory (DFT) calculations, is due to a significant synergistic effect from the abundant hydrogen-bond structure between coordinated water molecules and SO42- ions that affords rich and accessible active sites, in conjunction with the bimetallic effect.
- Subjects :
- Materials science
Hydrogen
Process Chemistry and Technology
Oxygen evolution
chemistry.chemical_element
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Electrocatalyst
01 natural sciences
Catalysis
0104 chemical sciences
Bimetal
chemistry
Chemical engineering
Water splitting
Molecule
Density functional theory
0210 nano-technology
Bimetallic strip
General Environmental Science
Subjects
Details
- ISSN :
- 09263373
- Volume :
- 258
- Database :
- OpenAIRE
- Journal :
- Applied Catalysis B: Environmental
- Accession number :
- edsair.doi...........5f41b2a5f6dffe9670a89b514167cb7f