Boron-modulated surface of hollow nickel framework for improved hydrogen evolution

Gu, Weishi; Pan, Zhong-Qin; Han, Tao; Guo, Yanling; Pu, Jun; Zhong, Chenglin; Li, Jiachen; Ye, Changqing; Zhou, Qingwen

doi:10.1039/d0cc08084e

Cited by 6 publications

(3 citation statements)

References 28 publications

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“…The pore size distribution at about 3.4 nm ( Figure 2 f) indicated that the sample had good mesoporous properties. In general, an extremely high surface area and abundant pore structure would greatly improve the adsorption site of NiCo 2 O 4 to LiPSs and the infiltration and transfer rate of electrolyte and charge [ 24 , 25 ].…”

Section: Resultsmentioning

confidence: 99%

Multiple Effects of High Surface Area Hollow Nanospheres Assembled by Nickel Cobaltate Nanosheets on Soluble Lithium Polysulfides

Zhu

Wang

et al. 2023

Molecules

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Inhibiting the shuttle effect of soluble polysulfides and improving slow reaction kinetics are key factors for the future development of Li–S batteries. Herein, edelweiss shaped NiCo2O4 hollow nanospheres with a high surface area were prepared by a simple template method to modify the separator to realize multiple physical constraints and strong chemical anchoring on the polysulfides. On one hand, the good electrolyte wettability of NiCo2O4 promoted the migration of Li-ions and greatly improved the dynamics. On the other hand, mesoporous NiCo2O4 nanomaterials provided many strong chemical binding sites for loading sulfur species. The hollow structure also provided a physical barrier to mitigate the sulfur species diffusion. Therefore, the modified separator realized multiple physical constraints and strong chemical anchoring on sulfur species. As a result, the sulfur cathode based on this composite separator showed significantly enhanced electrochemical performance. Even at 4 C, a high capacity of 505 mAh g−1 was obtained, and about 80.6% could be retained after 300 cycles.

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Section: Resultsmentioning

confidence: 99%

Multiple Effects of High Surface Area Hollow Nanospheres Assembled by Nickel Cobaltate Nanosheets on Soluble Lithium Polysulfides

Zhu

Wang

et al. 2023

Molecules

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“…Zhou et al designed and prepared a hollow Ni framework (HNF) with exterior‐interiorly exposed surface active sites, where more efficient Ni–B active sites were introduced in situ on the surface of the HNF by chemical reduction. [ 135 ] As‐synthesized electrode shows excellent HER performance in 1.0 m KOH solution with a small overpotential of 83 mV at 10 mA cm −2 , which even surpasses the commercial Pt/C catalyst at high current density with impressive stability up to 100 h. Electroless plating is a facile method to synthesize binder‐free Ni–B films on conductive electrodes. Wang and co‐workers deposited Ni–B x films on the Cu plate by electroless plating and explored their catalytic HER performance at all pH values.…”

Section: Progresses Of Representative Ni‐based Electrocatalystsmentioning

confidence: 99%

Recent Advances in Ni‐Based Electrocatalysts for Hydrogen Evolution Reaction

Zeng

et al. 2022

Energy Tech

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Electrochemical water splitting driven by the electricity generated from renewable energy is an ideal sustainable approach for hydrogen production, where an efficient hydrogen evolution reaction (HER) electrocatalyst is indispensable. Ni-based electrocatalysts are widely investigated for HER in different electrolytes due to their advantages of high Earth abundance, remarkable corrosion resistance, efficient electrocatalytic performance, and high electrical conductivity. Although several Ni-based electrocatalysts exhibit catalytic HER performance comparable to that of state-of-the-art Pt catalysts, it is still lack of practical applications possibly due to the duration limitation. In order to promote the nextstep intensive studies and applications, it is important to systematically summarize the progress of Ni-based electrocatalysts for HER. Accordingly, this review article focuses on the recent advances in Ni-based electrocatalysts toward HER, which includes the mechanism of the electrocatalytic HER in different electrolytes and progresses in the Ni-based electrocatalysts toward HER. The preparation approaches, electrocatalytic activities, and overall performance comparison of the Ni-based electrocatalysts are systemically summarized based on Ni-based compounds, that is, phosphides, chalcogenides, nitrides, carbides, borides, alloys, and (hydro)oxides. The improvement modulation strategies including morphological/phase control, heterostructures/heterointerfaces, defect engineering, composite engineering, and heteroatom doping are thoroughly discussed. Finally, corresponding challenges and perspectives are proposed.

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“…6,7 Among transition-metal-based electrocatalysts, Ni and Fe are earth-abundant elements and exhibit high performance in the catalysis of OER, which is beneficial for achieving an optimal interaction strength with OH ad and satisfies the Sabatier principle for catalyst design. [8][9][10] Moreover, it has been proved that Fe can modulate the electronic structure of Ni, which optimizes their adsorption energy and further enhances their electrocatalytic activities. 11 In particular, the special class of NiFe-layered double hydroxide (NiFe LDH) materials are investigated as electrodes for alkaline water splitting.…”

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confidence: 99%

Facile method to activate substrate for oxygen evolution by a galvanic-cell reaction

Zhong

Huo

et al. 2023

Chem. Commun.

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Boron-modulated surface of hollow nickel framework for improved hydrogen evolution

Abstract: Taking advantage of micro/nano structure engineering and surface boron modulation, we developed a binder-free and support-free electrode to enrich and optimize active sites of Ni.

Cited by 6 publications

References 28 publications

Multiple Effects of High Surface Area Hollow Nanospheres Assembled by Nickel Cobaltate Nanosheets on Soluble Lithium Polysulfides

Multiple Effects of High Surface Area Hollow Nanospheres Assembled by Nickel Cobaltate Nanosheets on Soluble Lithium Polysulfides

Recent Advances in Ni‐Based Electrocatalysts for Hydrogen Evolution Reaction

Facile method to activate substrate for oxygen evolution by a galvanic-cell reaction

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