Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6471031 | Electrochimica Acta | 2017 | 7 Pages |
â¢Nanocrystalline Co0.85Se is synthesized by a facile DMF-solvothermal method.â¢Nanocrystalline Co0.85Se electrocatalyst delivers superior HER performance.â¢Superior HER Performance of Co0.85Se is due to its unique 3D network structure.
For the first time, the nanocrystalline Co0.85Se (NC-Co0.85Se) electrocatalyst with high efficiency of hydrogen evolution reaction (HER) has been synthesized through a facile DMF-solvothermal reaction. Compared to hydrothermally synthesized Co0.85Se (H-Co0.85Se) with relatively poor HER performance, the NC-Co0.85Se catalyst exhibits superior HER performances. Electrochemical measurements show that the NC-Co0.85Se has a very low onset overpotential of â¼127 mV in 0.5 M H2SO4, a high cathode current density of 30 mA cmâ2 at â¼â210 mV vs RHE, and excellent long-term stability. Most importantly, the NC-Co0.85Se exhibits an ultra-small Tafel slope of 34.1 mV decâ1, which is close to that of noble platinum (Pt) catalyst (30.1 mV decâ1). It is promising for NC-Co0.85Se as a highly efficient non-noble-metal electrocatalyst to replace precious Pt-based catalysts for hydrogen evolution.
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