In Situ Growth of Sn‐Doped Ni<sub>3</sub>S<sub>2</sub> Nanosheets on Ni Foam as High‐Performance Electrocatalyst for Hydrogen Evolution Reaction

Yu, Jing; Ma, Fei‐Xiang; Du, Yue; Wang, Panpan; Xu, Cheng‐Yan; Zhen, Liang

doi:10.1002/celc.201600652

Cited by 70 publications

(38 citation statements)

References 65 publications

(100 reference statements)

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“…All products display strong diffraction peaks of cubic Ni (JCPDS No. 00–001‐1260) at 2θ=44.52°, 51.84° and 76.46° in keeping with the previous reports . The diffraction peaks of Ni 3 S 2 are observed in 21.84°, 31.20°, 37.92°, 49.94°, 50.22°, 50.28°, 55.36, which correspond to (101), (110), (003), (113), (211), (122), (300) planes of trigonal Ni 3 S 2 (JCPDS No.…”

Section: Resultssupporting

confidence: 86%

Design and Excellent HER Performance of a Novel 3D Mo–Doped Ni₃S₂/Ni Foam Composite

Chen

Song

et al. 2019

ChemistrySelect

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A new method was applied to facilitate Mo doping in Ni3S2, which successfully fabricated Mo‐doped Ni3S2/Ni foam composite. The results of X‐ray diffraction (XRD) and X‐ray photoelectron spectroscopy (XPS) manifest that Mo element was triumphantly introduced into Ni3S2. The Mo‐doped Ni3S2/Ni foam composite possesses three‐dimensional (3D) hierarchical structure with column type characterized by scanning electron microscopy (SEM). The diameter of the column is ∼300 nm. Each of these columns is made up of many nanopetals. The hydrogen evolution reaction (HER) test results exhibit that the products have outstanding HER performance. The Tafel slope of the optimal Mo‐doped Ni3S2/Ni foam composite is 131.7 mV dec−1. The overpotentials are 97.1 mV and 392.1 mV at the current density of 10 mA cm−2 and 100 mA cm−2, respectively. Moreover, the products show good stability.

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Section: Resultssupporting

confidence: 86%

Design and Excellent HER Performance of a Novel 3D Mo–Doped Ni₃S₂/Ni Foam Composite

Chen

Song

et al. 2019

ChemistrySelect

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“…High resolution XPS spectra of Ni 2p (Figure ) showed two strong peaks at around 872.7 and 855.2 eV which can be attributed to Ni 2p 3/2 and Ni 2p 1/2 , respectively. The energy difference between Ni 2p 1/2 and Ni 2p 3/2 is 17.5 eV, indicating the coexistence of Ni 2+ and Ni 3+ species ,. The peak at 852.7 eV is the characteristic peak of Ni 3 S 2 , and the peak at 853.6 eV is the characteristic peak of NiO x .…”

Section: Resultsmentioning

confidence: 97%

Self‐Supported Hierarchical Shell@Core Ni₃S₂@Ni Foam Composite Electrocatalyst with High Efficiency and Long‐Term Stability for Methanol Oxidation

et al. 2018

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Direct methanol fuel cells are promising renewable energy devices for automobiles and portable electronic devices. The development of high effciency, poison tolerance, long‐term stability, and noble metal‐free electrocatalysts for methanol oxidation is still a major challenge. Herein, we develop a noble metal‐free, 3D self‐supported, defect‐rich, hierarchical shell‐core structured Ni3S2 composite on Ni foam as electrocatalyst. This electrocatalyst shows a good activity, poison tolerance, and long‐term durability towards methanol oxidation in alkaline media. It shows the lowest onset potential (−340 mV vs. Hg/HgO) among all the Ni‐based catalysts reported up to date and a Pt‐level specific activity. The methanol oxidation peak current of the electrocatalyst retains more than 97.5 % even after 5,000 voltammetry cycles in 0.5 M KOH+1 M CH3OH. The morphology and composition of the electrocatalysts before and after stability test were characterized by SEM, TEM, XRD, and XPS. The high activity, poison tolerance, and stability are attributed to the binder‐free, directly grown Ni3S2 shell on the Ni foam backbone, the lattice defect sites, and the synergetic eﬀects between the in‐situ formed active NiOx core and Ni3S2 shell during methanol oxidation. This work indicates that the self‐supported hierarchical shell‐core Ni3S2@Ni foam electrocatalyst is a viable alternative for commercial Pt‐based electrocatalyst applied in fuel cells.

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“…[10][11][12][13][14][15][16][17] Nickel sulfide with suitable element doping can modulate its electronic and surface structure, hence, significantly enhancing the electrocatalytic performance for OER and (or) HER. Zn, [18] V, [19] Sn, [20] N, [21] Mo, [22] and Fe [23][24][25][26][27][28] elements have been doped in nickel sulfide lattices for promoted OER, HER or overall water splitting electrocatalysis. Interestingly, it is found that the electrochemically oxidized transition metal chalcogenides can improve their catalytic performances for OER.…”

Section: Introductionmentioning

confidence: 99%

Fe‐Doped Ni₃S₂ Nanowires with Surface‐Restricted Oxidation Toward High‐Current‐Density Overall Water Splitting

Wang

Zhang

et al. 2019

ChemElectroChem

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It is critical to develop a highly effective and economical electrocatalyst to lower the energy losses for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). In this work, Fe‐doped Ni3S2 nanowires with diameters of ca. 17 nm and lengths of 1.4∼2 μm are synthesized on Ni foam through a one‐step solvothermal route for alkaline water splitting, which display notable active and excellent durability for both OER and HER under high current densities. The optimal Fe13.7%‐Ni3S2 nanowires electrode can attain 200 mA cm−2 at a fairly low overpotential of 223 mV, and 500 mA cm−2 at 245 mV toward OER. Furthermore, it yields a considerable low overpotential of 109 mV to garner 10 mA cm−2, and 246 mV for 500 mA cm−2 toward HER. The incorporation of iron simultaneously modifies the electronic structure and morphology of Ni3S2, which not only enhances the conductivity but also generates abundant active edge sites. The slight surface‐restricted oxidation of nanowires in a strongly basic electrolyte in situ generates a large number of interfaces, which enables the reactivity and durability for both OER and HER. Accordingly, an alkaline water electrolyzer with two Fe13.7%‐Ni3S2 electrodes only requires a low cell voltage of 1.53 V to achieve 10 mA cm−2, and 1.95 V to 500 mA cm−2 with striking stability. The as‐prepared Fe‐doped Ni3S2 nanowires can be potentially utilized for actual water electrolysis under high current densities.

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In Situ Growth of Sn‐Doped Ni₃S₂ Nanosheets on Ni Foam as High‐Performance Electrocatalyst for Hydrogen Evolution Reaction

Cited by 70 publications

References 65 publications

Design and Excellent HER Performance of a Novel 3D Mo–Doped Ni₃S₂/Ni Foam Composite

Design and Excellent HER Performance of a Novel 3D Mo–Doped Ni₃S₂/Ni Foam Composite

Self‐Supported Hierarchical Shell@Core Ni₃S₂@Ni Foam Composite Electrocatalyst with High Efficiency and Long‐Term Stability for Methanol Oxidation

Fe‐Doped Ni₃S₂ Nanowires with Surface‐Restricted Oxidation Toward High‐Current‐Density Overall Water Splitting

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In Situ Growth of Sn‐Doped Ni3S2 Nanosheets on Ni Foam as High‐Performance Electrocatalyst for Hydrogen Evolution Reaction

Cited by 70 publications

References 65 publications

Design and Excellent HER Performance of a Novel 3D Mo–Doped Ni3S2/Ni Foam Composite

Design and Excellent HER Performance of a Novel 3D Mo–Doped Ni3S2/Ni Foam Composite

Self‐Supported Hierarchical Shell@Core Ni3S2@Ni Foam Composite Electrocatalyst with High Efficiency and Long‐Term Stability for Methanol Oxidation

Fe‐Doped Ni3S2 Nanowires with Surface‐Restricted Oxidation Toward High‐Current‐Density Overall Water Splitting

Contact Info

Product

Resources

About

In Situ Growth of Sn‐Doped Ni₃S₂ Nanosheets on Ni Foam as High‐Performance Electrocatalyst for Hydrogen Evolution Reaction

Design and Excellent HER Performance of a Novel 3D Mo–Doped Ni₃S₂/Ni Foam Composite

Design and Excellent HER Performance of a Novel 3D Mo–Doped Ni₃S₂/Ni Foam Composite

Self‐Supported Hierarchical Shell@Core Ni₃S₂@Ni Foam Composite Electrocatalyst with High Efficiency and Long‐Term Stability for Methanol Oxidation

Fe‐Doped Ni₃S₂ Nanowires with Surface‐Restricted Oxidation Toward High‐Current‐Density Overall Water Splitting