Encapsulating Iridium Nanoparticles Inside a 3D Cage-Like Organic Network as an Efficient and Durable Catalyst for the Hydrogen Evolution Reaction.
Clicks: 252
ID: 72792
2018
Developing efficient and durable electrocatalysts is key to optimizing the electrocatalytic hydrogen evolution reaction (HER), currently one of the cleanest and most sustainable routes for producing hydrogen. Here, a unique and efficient approach to fabricate and embed uniformly dispersed Ir nanoparticles in a 3D cage-like organic network (CON) structure is reported. These uniformly trapped Ir nanoparticles within the 3D CON (Ir@CON) effectively catalyze the HER process. The Ir@CON electrocatalyst exhibits high turnover frequencies of 0.66 and 0.20 H s at 25 mV and small overpotentials of 13.6 and 13.5 mV while generating a current density of 10 mA cm in 0.5 m H SO and 1.0 m KOH aqueous solutions, respectively, as compared to commercial Pt/C (18 and 23 mV) and Ir/C (20.7 and 28.3 mV). More importantly, the catalyst shows superior stability in both acidic and alkaline media. These results highlight a potentially powerful approach for the design and synthesis of efficient and durable electrocatalysts for HER.
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| Authors | Mahmood, Javeed;Anjum, Mohsin Ali Raza;Shin, Sun-Hee;Ahmad, Ishfaq;Noh, Hyuk-Jun;Kim, Seok-Jin;Jeong, Hu Young;Lee, Jae Sung;Baek, Jong-Beom; |
| Journal | advanced materials (deerfield beach, fla) |
| Year | 2018 |
| DOI | 10.1002/adma.201805606 |
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