Premium
Encapsulating Iridium Nanoparticles Inside a 3D Cage‐Like Organic Network as an Efficient and Durable Catalyst for the Hydrogen Evolution Reaction
Author(s) -
Mahmood Javeed,
Anjum Mohsin Ali Raza,
Shin SunHee,
Ahmad Ishfaq,
Noh HyukJun,
Kim SeokJin,
Jeong Hu Young,
Lee Jae Sung,
Baek JongBeom
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201805606
Subject(s) - electrocatalyst , iridium , materials science , catalysis , nanoparticle , chemical engineering , nanotechnology , hydrogen , electrochemistry , electrode , organic chemistry , chemistry , engineering
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 2 s −1 at 25 mV and small overpotentials of 13.6 and 13.5 mV while generating a current density of 10 mA cm −2 in 0.5 m H 2 SO 4 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.