Mesoporous Iron Sulfide for Highly Efficient Electrocatalytic Hydrogen Evolution

Abstract

We report a facile synthetic protocol to prepare mesoporous FeS without the aid of hard template as an electrocatalyst for the hydrogen evolution reaction (HER). The mesoporous FeS materials with high surface area were successfully prepared by a sol-gel method following a sulfurization treatment in an HS atmosphere. A remarkable HER catalytic performance was achieved with a low overpotential of 96 mV at a current density of 10 mA·cm and a Tafel slope of 78 mV per decade under alkaline conditions (pH 13). The theoretical calculations indicate that the excellent catalytic activity of mesoporous FeS is attributed to the exposed (210) facets. The mesoporous FeS material might be a promising alternative to the Pt-based electrocatalysts for water splitting.

Hierarchical Co–FeS2/CoS2 heterostructures as a superior bifunctional electrocatalyst

“…2c 46 In addition, density functional theory calculation revealed that sulfur was responsible for the active sites for proton adsorption and reduction; the high catalytic activity was stemmed from a large reduction of the kinetic energy barrier of H atom adsorption on FeS 2 surface upon Co doping in the iron pyrite structure. 18,19 The formation of heterostructures for Co-FeS 2 and CoS 2 further lowers the kinetic energy barrier of the reaction to gain superior electrocatalytic performance.…”

“…7,18 However, the catalytic performance of iron sulde is limited by its low surface area and lack of active sites. 19 If the non-noble metals electrocatalysts are grown on carbon material substrates, doping with homologous elements not only reduces the catalytic resistance but also exposes more active sites. [20][21][22] Furthermore, the formation of epitaxial heterostructures can regulate the energy barrier between the two interfaces to reduce the catalytic kinetic energy.…”

Earth‐Abundant Transition‐Metal‐Based Electrocatalysts for Water Electrolysis to Produce Renewable Hydrogen

“…The hybrid Co 0.85 Se/graphene catalyst had al ow Ta fel slope of 34.4 mV dec À1 compared with that of unhybridized Co 0.85 Se (41.8 mV dec À1 ), suggestingaVolmer-Ta fel combination. [44] Introducing Mo to form MoÀFe selenide could modulate the electronic properties of the heterointerface and accelerate electron transfer from FeSe 2 to the active sites of 1T-MoSe 2 ,f acilitating the HER kinetics and resultingi nasmall Tafel slope of 57.7 mV dec À1 . [42] Leonard and co-workersh ave synthesized low-dimensional FeS 2 nanostructures and found that the 2D FeS 2 discs exhibited the highest electrocatalytic activity compared to the 1D FeS 2 nanowires and 3D FeS 2 cubes.…”

Nonsiliceous Mesoporous Materials: Design and Applications in Energy Conversion and Storage

“…Mesoporous FeS 2 with a high surface area was proposed as a promising alternative to Pt‐based electrocatalysts for water splitting. This material showed remarkable activity in the H 2 evolution reaction and had a low overpotential as a result of exposed (210) facets . Modified carbon materials are also promising electrocatalyst candidates; examples include mesoporous network‐like carbon doped with N and mesoporous carbon frameworks enriched with N and embedded with Cu and Co .…”