| Autor: |
An, Yiming, Huang, Bolong, Wang, Zilong, Long, Xia, Qiu, Yongcai, Hu, Jue, Zhou, Dan, Lin, He, Yang, Shihe |
| Předmět: |
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| Zdroj: |
Dalton Transactions: An International Journal of Inorganic Chemistry; 8/28/2017, Vol. 46 Issue 32, p10700-10706, 7p |
| Abstrakt: |
It is still a challenging issue to design earth-abundant electrocatalysts with low cost, high activity and long-term stability for the hydrogen evolution reaction (HER) based on water splitting in alkaline solutions. Here, we report a facile synthetic route for a three-dimensional, porous Ni/Ni3S2 nano-network on carbon cloth for the efficient catalysis of HER. This unique structure exposes a high proportion of Ni/Ni3S2 hetero-interfaces to the electrolyte, creating a synergetic effect between Ni and Ni3S2 that enhances HER. The synergetic effect at the interface was verified by DFT calculation and involves the interface-assisted heterolytic splitting of H2O into OH− and H+ and the subsequent expeditious H2-forming reaction caused by weakened binding between Ni and H induced by the neighboring Ni3S2. The resulting porous network shows high HER activity in alkaline media, reaching 10 mA cm−2 at 95 mV with a Tafel slope of 66 mV dec−1. This value is much smaller than that of nickel metal, which is currently used in industry. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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