Journal
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
Volume 29, Issue 3, Pages 356-361Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.pnsc.2019.05.009
Keywords
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Funding
- Science Challenge Project [TZ2018004]
- National Natural Science Foundation of China [51861130360, 51572016, U1530401]
- Newton Advanced Fellowships [NAF\ R1\ 180242]
- Beijing Computational Science Research Center (CSRC)
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Design efficient electrocatalysts become significant for the hydrogen evolution reaction (HER) in alkaline solution. Here, the HER performance on Pt-Co(OH)(2) has been investigated by using DFT calculations. Compared with pure Pt, the Pt-Co(OH)(2) shows excellent hydrogen binding energy (-0.29 eV) and hydrogen adsorption free energy (0.02 eV). More strikingly, the water dissociation process on Pt-Co(OH)(2) is an exothermic reaction while that of Pt is an endothermic reaction, demonstrating that the Pt-Co(OH)(2) is an excellent catalyst for HER in alkaline medium. Then the two-step electrodepositions was used to fabricate Pt-Co(OH)(2) on the carbon paper (CP). The Pt-Co(OH)(2)/CP shows the lowest overpotential of only 37.6 mV at a current density of 10 mA cm(-2) in 0.1M KOH, the smallest Tafel slope of 58 mV dec(-1) and the good stability for 20000s without obvious degradation.
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