High-efficiency hydrogen evolution from seawater using hetero-structured T/Td phase ReS2 nanosheets with cationic vacancies

Zhou, Gang; Guo, Zijing; Shan, Yun; Wu, Shuyi; Zhang, Jinlei; Yan, Kang; Liu, Lizhe; Chu, Paul K.; Wu, Xinglong

doi:10.1016/j.nanoen.2018.10.047

Cited by 108 publications

(55 citation statements)

References 31 publications

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“…[ 11 ] However, the photoenhanced HER (PE‐HER) performance induced by injection of hot electrons into edge active sites is still limited. [ 12 ] This is mainly a result of the following: 1) Hot electrons cannot be effectively utilized because of massively quick electron‐hole recombination. [ 13 ] 2) Low mobility and short diffusion length of hot electrons further increased the difficulty of injecting into edge sites.…”

Section: Figurementioning

confidence: 99%

Dual‐Enhanced Doping in ReSe₂ for Efficiently Photoenhanced Hydrogen Evolution Reaction

Wang

Han

et al. 2020

Advanced Science

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metal dichalcogenides (TMDs) are a typical 2D nanomaterial and have shown substantial progress in terms of catalysis and energy storage applications. [2] In the last few years, TMD-based catalysts have been optimized by introducing additional basalplane vacancies and metastable metallic crystal structures to overcome their low concentration of electrocatalytic activity sites and poor intrinsic electroconductibility; thus, the catalysts exhibited much enhanced HER catalytic activity. [3] In addition to achieving significant advances in structural designs, other driving forces, such as thermal energy, [4] field effect, [5] and strain engineering, [6] have also been utilized to boost the HER performance of electrocatalysts. [7] Because solar energy is an available clean and sustainable energy, solar-driven photocatalytic and photoelectrochemical water splitting has become one of the hottest topics in materials science. [8] Rhenium dichalcogenides (ReX 2 , X = S or Se) are a unique category of compounds that have both distorted triclinic symmetry (1T) crystal structure and excellent photoelectric properties with weak interlayer coupling; these characteristics ensure their excellent Rhenium dichalcogenides (ReX 2 , X = S or Se) are catalysts that have great promise for the photoenhanced hydrogen evolution reaction (PE-HER) because of their unique physiochemical properties. However, the catalytic performance is still restricted by their low concentration of electrocatalytic activity sites and poor injection of hot electrons. Herein, dual-enhancement in ReSe 2 nanosheets (NSs) with high concentration of active sites and efficient use of hot electrons is simultaneously achieved with moderate Mo doping. Contributions from exposed catalytically active sites, improved electrical conductivity, and enhanced solar spectral response are systematically investigated. Superior PE-HER catalytical performance is obtained in Re 0.94 Mo 0.06 Se 2 , which has more catalytically active sites and optimized band structure than other Re 1−x Mo x Se 2 samples. Here, it is demonstrated that only doping can reduce the overpotential (η 10 ) from 239 to 174 mV at −10 mA cm −2 (Δ1η 10 = 65 mV). Then, η 10 is further improved to 137 mV under simulated AM 1.5 sun illumination (Δ2η 10 = 37 mV). The total improvement (Δη 10 ) toward PE-HER is 102 mV (Δ1η 10 + Δ2η 10 = 102 mV) in optimal Re 0.94 Mo 0.06 Se 2 . This work presents a new perspective for researching highefficiency photoenhanced HER ReSe 2 -based electrocatalysts and other layered transition metal dichalcogenides. Figure 4. XANES spectra (inset in panel (a)) and a) EXAFS spectra of the as-exfoliated ReSe 2 and Re 0.94 Mo 0.06 Se 2 NSs. b) Density functional theory schematic diagram. c) HER free-energy diagram. d) Density of states plots for monolayers of ReSe 2 , Re 0.94 Mo 0.06 Se 2 , and MoSe 2 . e-g) Schematic diagrams of the separation and recombination process for an electron-hole in Re 1−x Mo x Se 2 . www.advancedsciencenews.com 2000216 (7 of 7)

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Section: Figurementioning

confidence: 99%

Dual‐Enhanced Doping in ReSe₂ for Efficiently Photoenhanced Hydrogen Evolution Reaction

Wang

Han

et al. 2020

Advanced Science

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“…first reported the high HER activity of the exfoliated ReS 2 , [ 22 ] extensive efforts have been devoted to the synthesis of ReS 2 nanostructures for HER. [ 23–28 ] One of the primary pathways for synthesizing TMDCs is chemical vapor deposition (CVD), enabling the growth of high‐quality, large‐area, and atomically thin nanosheets with good uniformity, scalability, and controllability. [ 29,30 ] Due to its unique structure, ReS 2 nanosheets can grow perpendicularly to the substrate surface by CVD.…”

Section: Introductionmentioning

confidence: 99%

Controlled Growth of Edge‐Enriched ReS₂ Nanoflowers on Carbon Cloth Using Chemical Vapor Deposition for Hydrogen Evolution

Zhao

Huang

et al. 2020

Adv Materials Inter

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producing hydrogen, a clean and renewable energy source. [1-7] Platinum (Pt) has been widely recognized as the best HER catalyst, but subject to its high cost and limited storage. Therefore, to replace Pt, many efforts have been devoted to electrocatalysts based on non-noble metals such as transition metal complexes, oxides, phosphide, carbides, and transition metal dichalcogenides (TMDCs). [1-4] Amongst, TMDCs have been widely studied as excellent electrocatalysts for HER. [5-7] TMDCs with the formula MX 2 , where "M" stands for a transition metal and "X" represents a chalcogen, has received extensive attention due to their unique structure and excellent properties in recent years. [8,9] The diverse family of TMDCs offers great opportunities for broad applications, including electronic or optoelectronic devices, sensing, energy storage, and catalysis, to name a few. [10-12] Both theories and experiments have demonstrated that only the edges of most TMDCs are catalytically active, while the basal planes are inert. [5] Therefore, optimizing the edge structures is one of the primary strategies for enhancing HER catalytic activity. [6,7,12] Unlike the well-studied MoW W-, or Hf-based dichalcogenides, [13-17] ReS 2 naturally tends to crystallize in a distorted 1T structure. [18] Due to this distorted T phase structure, the interlayer coupling between ReS 2 layers becomes much weaker. [19] Such weakly interlayer coupling can permit the exposure of more active edge sites, simultaneously facilitating the diffusion of electrolyte ions between layers. [20] Thus, ReS 2 shows great potential as a high-performance HER catalyst. [12,19,21] Since Fujita et al. first reported the high HER activity of the exfoliated ReS 2 , [22] extensive efforts have been devoted to the synthesis of ReS 2 nanostructures for HER. [23-28] One of the primary pathways for synthesizing TMDCs is chemical vapor deposition (CVD), enabling the growth of high-quality, large-area, and atomically thin nanosheets with good uniformity, scalability, and controllability. [29,30] Due to its unique structure, ReS 2 nanosheets can grow perpendicularly to the substrate surface by CVD. [23] Based on this, abundant trions in the two-electron catalytic process can lead to highly efficient hydrogen evolution of ReS 2. [24] Further, the charge regulating effect of TMTM bonds in ReS 2 may offer a new pathway for creating more active states. [25] Rhenium disulfide (ReS 2) has attracted tremendous interests as a promising electrocatalyst for hydrogen evolution reaction (HER) due to its unique distorted 1T structure. However, the controllable synthesis of ReS 2 with desired nanostructures is still a challenge for improving its catalytic performance. Here, ReS 2 nanoflowers are constructed on conductive carbon cloth by means of ambient pressure chemical vapor deposition. Characterization results confirm that the nanoflower structure with enormous edges is attributed to its propensity of out-of-plane growth. To investigate the structure variation of the nanoflowers, systema...

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“…6,7 In principle, an excellent electrocatalyst should have an optimal Gibbs free energy (DG H ) to facilitate the rate-determining step, in addition to high conductivity and low resistance, which provide benefits for faster charge transfer and large superficial area to provide enough active sites. [8][9][10][11] It is generally known that the HER performance strongly depends on the catalyst's intrinsic physical characteristics. Therefore, the innovative breakthroughs in designing new types of catalysts should turn to regulating a materials intrinsic electronic structure, e.g., structural phase transition.…”

Section: Introductionmentioning

confidence: 99%

Electric Strain in Dual Metal Janus Nanosheets Induces Structural Phase Transition for Efficient Hydrogen Evolution

Shan

Zhou

et al. 2019

Joule

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The future of sustainable energy supply demands innovative breakthroughs in the design of cheap and durable catalysts for efficient electrochemical water splitting. Distinct from the conventional doping, defecting, and nanostructuring strategy, we develop a simple and feasible electric-strain way to trigger electrocatalyst's structural phase transition via regulating carrier distribution, realizing an excellent hydrogen evolution reaction (HER) performance. Herein, thanks to the intrinsic noncentrosymmetric polarization of our designed Janus MoReS 3 nanostructures, large numbers of carriers are energetically pulled into the catalyst's interior to generate electric strain, leading to the deformation of the charged MoReS 3 nanosheets and transition from T 0 phase to another reversible atomic configuration (T 00 phase) with higher catalytic activity and faster carrier transfer. The electric-strain-generated T 00-MoReS 3 shows HER performances in excess of a commercial Pt/C electrode at large current densities, reaching a current density of 150 mA cm À2 at an overpotential of 189 mV.

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High-efficiency hydrogen evolution from seawater using hetero-structured T/Td phase ReS2 nanosheets with cationic vacancies

Cited by 108 publications

References 31 publications

Dual‐Enhanced Doping in ReSe₂ for Efficiently Photoenhanced Hydrogen Evolution Reaction

Dual‐Enhanced Doping in ReSe₂ for Efficiently Photoenhanced Hydrogen Evolution Reaction

Controlled Growth of Edge‐Enriched ReS₂ Nanoflowers on Carbon Cloth Using Chemical Vapor Deposition for Hydrogen Evolution

Electric Strain in Dual Metal Janus Nanosheets Induces Structural Phase Transition for Efficient Hydrogen Evolution

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High-efficiency hydrogen evolution from seawater using hetero-structured T/Td phase ReS2 nanosheets with cationic vacancies

Cited by 108 publications

References 31 publications

Dual‐Enhanced Doping in ReSe2 for Efficiently Photoenhanced Hydrogen Evolution Reaction

Dual‐Enhanced Doping in ReSe2 for Efficiently Photoenhanced Hydrogen Evolution Reaction

Controlled Growth of Edge‐Enriched ReS2 Nanoflowers on Carbon Cloth Using Chemical Vapor Deposition for Hydrogen Evolution

Electric Strain in Dual Metal Janus Nanosheets Induces Structural Phase Transition for Efficient Hydrogen Evolution

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Dual‐Enhanced Doping in ReSe₂ for Efficiently Photoenhanced Hydrogen Evolution Reaction

Dual‐Enhanced Doping in ReSe₂ for Efficiently Photoenhanced Hydrogen Evolution Reaction

Controlled Growth of Edge‐Enriched ReS₂ Nanoflowers on Carbon Cloth Using Chemical Vapor Deposition for Hydrogen Evolution