O2 plasma and cation tuned nickel phosphide nanosheets for highly efficient overall water splitting

Dinh, Khang Ngoc; Sun, Xiaoli; Dai, Zhengfei; Zheng, Yun; Zheng, Penglun; Yang, Jun; Xu, Jianwei; Wang, Zhiguo; Yan, Qingyu

doi:10.1016/j.nanoen.2018.10.004

Cited by 121 publications

(42 citation statements)

References 40 publications

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“…[9,10] Element doping would be an effective method to improve the catalytic activities, such as doping Ni atoms in MoS 2 . [11][12][13][14][15] As for tuning the morphology, constructing 2D TMS nanosheets could generate abundant electroactive sites because of inherent large specific surface and rich active edges. [11][12][13][14][15] As for tuning the morphology, constructing 2D TMS nanosheets could generate abundant electroactive sites because of inherent large specific surface and rich active edges.…”

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confidence: 99%

“…Element doping would be an effective method to improve the catalytic activities, such as doping Ni atoms in MoS 2 . Considering that surfaces or interfaces play the key role in electrochemical reactions, the morphology, surface defects or interfaces, and electrical structures are the key factors on the electrocatalytic performances of efficient catalysts . As for tuning the morphology, constructing 2D TMS nanosheets could generate abundant electroactive sites because of inherent large specific surface and rich active edges .…”

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confidence: 99%

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Defect‐Rich Heterogeneous MoS₂/NiS₂ Nanosheets Electrocatalysts for Efficient Overall Water Splitting

et al. 2019

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Designing and constructing bifunctional electrocatalysts is vital for water splitting. Particularly, the rational interface engineering can effectively modify the active sites and promote the electronic transfer, leading to the improved splitting efficiency. Herein, free‐standing and defect‐rich heterogeneous MoS 2 /NiS 2 nanosheets for overall water splitting are designed. The abundant heterogeneous interfaces in MoS 2 /NiS 2 can not only provide rich electroactive sites but also facilitate the electron transfer, which further cooperate synergistically toward electrocatalytic reactions. Consequently, the optimal MoS 2 /NiS 2 nanosheets show the enhanced electrocatalytic performances as bifunctional electrocatalysts for overall water splitting. This study may open up a new route for rationally constructing heterogeneous interfaces to maximize their electrochemical performances, which may help to accelerate the development of nonprecious electrocatalysts for overall water splitting.

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Defect‐Rich Heterogeneous MoS₂/NiS₂ Nanosheets Electrocatalysts for Efficient Overall Water Splitting

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“…4a). Although inferior to NF@Pt/C (16 and 90 mV) at the same current densities, its performance is much better than those of most of the reported metal phosphides [1,19,[32][33][34][45][46][47][48][49][50], metal selenides [15,[51][52][53], metal nitrides [54][55][56][57] and heterogeneous structure catalysts [58][59][60][61] in alkaline solution ( Table. S3).…”

Section: Resultsmentioning

confidence: 95%

Synergistic electronic and morphological modulation on ternary Co1−xVxP nanoneedle arrays for hydrogen evolution reaction with large current density

Yang

Shang

Li³

et al. 2020

Sci. China Mater.

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It is a great challenge to prepare non-noble metal electrocatalysts toward hydrogen evolution reaction (HER) with large current density. Synergistic electronic and morphological structures of the catalyst have been considered as an effective method to improve the catalytic performance, due to the enhanced intrinsic activity and enlarged accessible active sites. Herein, we present novel ternary Co 1−x V x P nanoneedle arrays with modulated electronic and morphological structures as an electrocatalyst for highly efficient HER in alkaline solution. The NF@Co 1−x V x P catalyst shows a remarkable catalytic ability with low overpotentials of 46 and 226 mV at current densities of 10 and 400 mA cm −2 , respectively, as well as a small Tafel slope and superior stability. Combining the experimental and computational study, the excellent catalytic performance was attributed to the improved physical and chemical properties (conductivity and surface activity), large active surface area, and fast reaction kinetics. Furthermore, the assembled Co-V based electrolyzer (NF@Co 1−x V x-HNNs(+)||NF@Co 1−x V x P(−)) delivers small full-cell voltages of 1.58, 1.75, and 1.92 V at 10, 100, and 300 mA cm −2 , respectively. Our findings provide a systematic understanding on the V-incorporation strategy to promote highly efficient ternary electrocatalysts via synergistic control of morphology and electronic structures.

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“…This result revealed that the introduction of V 2 O 3 could accelerate electron transfer from the catalyst to the surface with adsorbed H atoms and thus enhance the HER activity . In addition, we speculate that the low R ct of Ni‐V 2 O 3 /NF can be attributed to its highly electron‐donating nature …”

Section: Figurementioning

confidence: 99%

“…[43] In addition, we speculate that the low R ct of Ni-V 2 O 3 / NF can be attributed to itsh ighlye lectron-donatingn ature. [44] The long-term stability of the Ni-V 2 O 3 /NF hybrid and its faradaic efficiency were measured by chronopotentiometry (inset of Figure 4e). The Ni-V 2 O 3 /NF hybrid showed good stability with faradaic efficiencies around 100 %w ith the overpotential showingn os ignificant increase when biased galvanostatically at À10 mA cm À2 for 24 h. Moreover,t he Ni-V 2 O 3/ NF catalyst retained as imilar LSV curve to the initial one after 10 000 cycles of potential sweepsf rom À0.20 Vt o0Vw ith as can rate of 50 mV s À1 (Figure 4e).…”

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Boosting Alkaline Hydrogen Evolution Electrocatalysis over Metallic Nickel Sites through Synergistic Coupling with Vanadium Sesquioxide

et al. 2019

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For renewable and sustainable energy, developing cut‐price and high‐efficiency electrocatalysts for the hydrogen evolution reaction (HER) by alkaline water electrolysis is of paramount importance. In this study, a compound electrocatalyst composed of nickel–vanadium sesquioxide nanoparticles supported on porous nickel foam (Ni‐V2O3/NF) is found to exhibit electrocatalytic performance towards HER that is superior to that of the commercial Pt/C catalyst, with nearly zero onset overpotential, an extremely low overpotential of 25 mV to obtain a current density of −10 mA cm−2, a Tafel slope of 58 mV dec−1, and a good durability for 24 h in 1.0 m KOH. Theoretical calculations reveal that the presence of V2O3 optimizes the electronic structure of active Ni components and continuously accelerates the dissociation of water molecules, which in turn improves the HER kinetics. The present work will advance the development of highly efficient nanocomposite electrocatalysts for alkaline water electrocatalysis.

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O2 plasma and cation tuned nickel phosphide nanosheets for highly efficient overall water splitting

Cited by 121 publications

References 40 publications

Defect‐Rich Heterogeneous MoS₂/NiS₂ Nanosheets Electrocatalysts for Efficient Overall Water Splitting

Defect‐Rich Heterogeneous MoS₂/NiS₂ Nanosheets Electrocatalysts for Efficient Overall Water Splitting

Synergistic electronic and morphological modulation on ternary Co1−xVxP nanoneedle arrays for hydrogen evolution reaction with large current density

Boosting Alkaline Hydrogen Evolution Electrocatalysis over Metallic Nickel Sites through Synergistic Coupling with Vanadium Sesquioxide

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O2 plasma and cation tuned nickel phosphide nanosheets for highly efficient overall water splitting

Cited by 121 publications

References 40 publications

Defect‐Rich Heterogeneous MoS2/NiS2 Nanosheets Electrocatalysts for Efficient Overall Water Splitting

Defect‐Rich Heterogeneous MoS2/NiS2 Nanosheets Electrocatalysts for Efficient Overall Water Splitting

Synergistic electronic and morphological modulation on ternary Co1−xVxP nanoneedle arrays for hydrogen evolution reaction with large current density

Boosting Alkaline Hydrogen Evolution Electrocatalysis over Metallic Nickel Sites through Synergistic Coupling with Vanadium Sesquioxide

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Defect‐Rich Heterogeneous MoS₂/NiS₂ Nanosheets Electrocatalysts for Efficient Overall Water Splitting

Defect‐Rich Heterogeneous MoS₂/NiS₂ Nanosheets Electrocatalysts for Efficient Overall Water Splitting