Abstract
Iodine (I) has emerged as a powerful heteroatom dopant for efficiently tailoring the electrocatalytic properties of graphene. However, the preparation methods of I-doped graphene (I-G) and its electrocatalysis applications remain largely unexplored. Herein, a one-step and low-temperature hydrothermal approach was developed for the successful synthesis of I-G with a high I-doping level (0.52 at.%). The resulting I-G was then applied as a metal-free catalyst for hydrogen evolution reaction (HER) and electrochemical sensing. It was shown that the I-G exhibited a dramatically enhanced HER activity compared to undoped graphene, attributed to the critical role of I-doping in offering large exposed active sites and high electron transfer capability. Furthermore, I-G also displayed attractive sensing performances for highly sensitive and selective detection of dopamine. These findings demonstrate that the hydrothermally synthesized I-G can be a promising electrocatalyst for multifunctional applications in water-splitting and electrochemical sensing.
Original language | English |
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Pages (from-to) | 1155-1162 |
Number of pages | 8 |
Journal | Electrochimica Acta |
Volume | 246 |
DOIs | |
Publication status | Published - 20 Aug 2017 |
Externally published | Yes |
Keywords
- Electrocatalysis
- Electrochemical dopamine sensor
- Hydrogen evolution reaction
- Iodine-doped graphene