Interface Engineering and Anion Engineering of Mo‐Based Heterogeneous Electrocatalysts for Hydrogen Evolution Reaction

Abstract

Development and utilization of hydrogen energy is an effective way to achieve carbon neutrality, only hydrogen production through electrolytic water splitting meets the goal of zero carbon emission. To facilitate the large‐scale commercialization of water splitting devices, the development of highly efficient and low‐cost catalysts to reduce the energy consumption is essential. MoS2 has been regarded as a promising electrocatalyst to replace platinum in hydrogen evolution reaction due to its low price and unique 2D layered structure. However, the poor conductivity and inert basal planes of MoS2 limited its wide‐spread application. Recently, researches have demonstrated that the conductivity and active sites of MoS2 can be improved by heteroatoms doping or constructing of heterogeneous structures. In this review, the recent progress of Mo‐based catalysts are summarized centered on MoS2 based on interface engineering and anion engineering, including MoS2–MoO2, MoS2–Mo2C, MoS2–MoNx, MoS2–MoP, and MoS2–MoSe2. The preparation method, structure, and performance of the catalysts are introduced and the possible mechanism behind the improved catalytic activity are revealed to give readers an overall comprehension on the progress of the Mo‐based electrocatalysts for hydrogen evolution reaction. In addition, an outlook on future opportunities and development directions of Mo‐based catalysts are proposed to facilitate the development of Mo‐based catalysts for hydrogen production.

Recent progress on bulk Fe-based alloys for industrial alkaline water electrolysis

“…19,29–35 Hence, transition metal derivatives were further investigated to improve the HER/OER performance, such as sulfides/selenides, 36–40 phosphides, 41–45 nitrides, 46–49 borides, 50–52 carbides, 53–55 oxides/(oxy)hydroxides, 56–62 and/or their hybrids. 63–67 To further improve the catalytic performance, many strategies have been explored, including doping, 48,68–72 alloying, 73–76 strain engineering, 77 interface construction, 43,78–85 morphology optimization, 86–91 hybridization, 65,92–95 and size-control. 96–101 Nanomaterials with ultra-high catalytic performance, which is comparable to or even better than that of commercial precious metals, have been reported.…”

Synergistic effects of MoS2-decorated in situ NiFe nanoalloys/NiFe-LDH with superhydrophilicity for electrocatalytic overall water splitting

“…The integration of highly efficient OER and HER catalytic materials into hetero-structured bifunctional catalysts via interface assembly engineering strategies has been widely studied. [12][13][14] Group VIII transition metal layered double hydroxides have relatively open structure and abundant active sites and allow full diffusion of water and release of gas molecules in overall water splitting. [15][16][17][18] In particular, nickel-iron layered double hydroxides (NiFe-LDH) have shown high oxidation activity and low overpotential in OERs due to the unique two-dimensional structure, adjustable interlayer anions and abundant active sites, 19,20 which endow them with moderate adsorption capacity toward oxygen-containing intermediates (OH* and OOH*), 19,21,22 proving to be promising and effective electrocatalysts for OERs.…”

Recent advances in interface engineering strategy for highly‐efficient electrocatalytic water splitting

“…19 Accordingly, several reviews have systematically elaborated the development of heterostructure catalysts. [20][21][22][23] However, a comprehensive review on the integration of model building, directional design, and electrocatalytic mechanism for the construction of electrocatalysts based on the interface engineering strategy has not been reported yet.…”

“…To realize high‐efficiency overall water splitting, electrocatalysts with bifunctional activity must be used, and the heterostructure catalysts assembled from HER‐active species and OER‐active species precisely meet this requirement 19 . Accordingly, several reviews have systematically elaborated the development of heterostructure catalysts 20–23 . However, a comprehensive review on the integration of model building, directional design, and electrocatalytic mechanism for the construction of electrocatalysts based on the interface engineering strategy has not been reported yet.…”