Ag-Nanoparticle-Anchored rGO-Coated MIL-88B(Fe) Hybrids as Robust Electrocatalysts for the Highly Efficient Oxygen Evolution Reaction at Neutral pH

作者：Islam Dewan Azharul; Barman Koushik; Jasimuddin Sk; Acharya Himadri

来源：ChemElectroChem, 2017, 4(12): 3110-3118.

DOI：10.1002/celc.201700883

<jats:title>Abstract</jats:title><jats:p>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<jats:sup>−2</jats:sup> 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<jats:sup>−1</jats:sup> is one of the best electrocatalytic performances reported at neutral pH.</jats:p>

• 出版日期2017-12