Premium
Ag‐Nanoparticle‐Anchored rGO‐Coated MIL‐88B(Fe) Hybrids as Robust Electrocatalysts for the Highly Efficient Oxygen Evolution Reaction at Neutral pH
Author(s) -
Islam Dewan Azharul,
Barman Koushik,
Jasimuddin Sk,
Acharya Himadri
Publication year - 2017
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201700883
Subject(s) - tafel equation , overpotential , catalysis , oxygen evolution , graphene , oxide , materials science , chemical engineering , nanoparticle , nanotechnology , inorganic chemistry , electrode , electrochemistry , chemistry , metallurgy , organic chemistry , engineering
The design of highly efficient, robust, and stable electrocatalysts for the oxygen evolution reaction (OER) remains a crucial challenge for the advancement of a number of renewable energy applications, including conversion and storage technology. Here, a robust water oxidation catalyst, Ag‐nanoparticle‐anchored reduced graphene oxide (rGO)‐coated MIL‐88B(Fe) hybrids (AgNPs@rGO/MIL‐88B(Fe)), is developedfor a highelectrocatalytic performance in the OER. Initially, MIL‐88B(Fe) is synthesized through an in situ process in exfoliated graphene oxide dispersion, forming a GO‐coated MIL‐88B(Fe) hybrid. Ag nanoparticles (ca. 3 nm) are then deposited through simultaneous reduction of silver ions and GO to form a robust AgNPs@rGO/MIL‐88B(Fe) combined catalyst. The new catalyst material was tested for the OER and exhibited remarkable catalytic performance, affording a current density of 1 mA cm −2 at a very low overpotential of approximately 395 mV in buffered solution (pH∼7). Furthermore, the sustained catalyst stability with Tafel slopes of 60 mV dec −1 is one of the best electrocatalytic performances reported at neutral pH.