A highly active hydrogen evolution electrocatalyst based on a cobalt–nickel sulfide composite electrode

Ansovini, Davide; Lee, Coryl Jing Jun; Chua, Chin-Seng; Ong, Lay Ting; Tan, Hui Ru; Webb, William; Raja, Robert; Lim, Yee‐Fun

doi:10.1039/c6ta00540c

Cited by 55 publications

(24 citation statements)

References 47 publications

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“…Thirdly, interfacial engineering can be accomplished by constructing high-quality heterojunction interfaces. Commonly, several heterojunction interfaces such as MoNi4/MoO2@Ni [22], Ni(OH)2/MoS2 [113], Ni3N/Ni [185], Pt/NiO@Ni [186], MoS2/Ni3S2 [187], hierarchical Ni3S2-NiOOH/Ni foam [112], Ni-P/MoSx [128], Co9S8-NixSy [130], and Ni/Ni3S2 [133] have been successfully constructed by coupling Ni-based and other types of electrocatalysts. As a typical example, Dai's group synthesized nanoscale NiO/Ni-CNT heterostructures via a low-pressure heat calcination route ( Fig.…”

Section: Fundamentals Of Ni-based H2-production Electrocatalystsmentioning

confidence: 99%

Ni-based photocatalytic H2-production cocatalysts2

Shen

Xie

Xiang

et al. 2019

Chinese Journal of Catalysis

255

108

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Photocatalysis is believed to be one of the best methods to realize sustainable H2 production. However, achieving this through heterogeneous photocatalysis still remains a great challenge owing to the absence of active sites, sluggish surface reaction kinetics, insufficient charge separation, and a high thermodynamic barrier. Therefore, cocatalysts are necessary and of great significance in boosting photocatalytic H2 generation. This review will focus on the promising and appealing low-cost Ni-based H2-generation cocatalysts as the alternatives for the high-cost and low-abundance noble metal cocatalysts. Special emphasis has been placed on the design principle, modification strategies for further enhancing the activity and stability of Ni-based cocatalysts, and identification of the exact active sites and surface reaction mechanisms. Particularly, four types of modification strategies based on increased light harvesting, enhanced charge separation, strengthened interface interaction, and improved electrocatalytic activity have been thoroughly discussed and compared in detail. This review may open a new avenue for designing highly active and durable Ni-based cocatalysts for photocatalytic H2 generation.

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Section: Fundamentals Of Ni-based H2-production Electrocatalystsmentioning

confidence: 99%

Ni-based photocatalytic H2-production cocatalysts2

Shen

Xie

Xiang

et al. 2019

Chinese Journal of Catalysis

255

108

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“…By now, the state‐of‐the‐art HER and OER electrocatalysts are based on precious metals, which are reported to display the lowest overpotentials at practical current densities. For example, RuO 2 exhibits an onset overpotential of about 140 mV to drive OER in alkaline solution while Pt displays nearly zero onset potential for HER under acidic condition . Nevertheless, because of their high cost and scarcity, the practical applications of these materials in water electrolysis are limited .…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Porous NiFeV Ternary Layer Hydroxide Nanosheets as a Highly Efficient Bifunctional Electrocatalyst for Overall Water Splitting

Dinh

Zheng

Dai

et al. 2017

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313

153

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Herein, the hydrothermal synthesis of porous ultrathin ternary NiFeV layer double hydroxides (LDHs) nanosheets grown on Nickel foam (NF) substrate as a highly efficient electrode toward overall water splitting in alkaline media is reported. The lateral size of the nanosheets is about a few hundreds of nanometers with the thickness of ≈10 nm. Among all molar ratios investigated, the Ni Fe V -LDHs/NF electrode depicts the optimized performance. It displays an excellent catalytic activity with a modest overpotential of 231 mV for the oxygen evolution reaction (OER) and 125 mV for the hydrogen evolution reaction (HER) in 1.0 m KOH electrolyte. Its exceptional activity is further shown in its small Tafel slope of 39.4 and 62.0 mV dec for OER and HER, respectively. More importantly, remarkable durability and stability are also observed. When used for overall water splitting, the Ni Fe V -LDHs/NF electrodes require a voltage of only 1.591 V to reach 10 mA cm in alkaline solution. These outstanding performances are mainly attributed to the synergistic effect of the ternary metal system that boosts the intrinsic catalytic activity and active surface area. This work explores a promising way to achieve the optimal inexpensive Ni-based hydroxide electrocatalyst for overall water splitting.

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“…Ni 3 S 2 showed the best catalytic activity owing to the fact that it had the largest electrochemically active surface area among them . Metal pyrites (MS 2 : M = Fe, Co, Ni, and their alloys) and alloyed nickel sulfides with tungsten and cobalt were recently studied in electrocatalytic hydrogen evolution. In addition, nickel sulfides have been used as co‐catalysts for the photocatalytic HER …”

Section: Introductionmentioning

confidence: 99%

Enhanced Hydrogen Evolution Catalysis at the Liquid/Liquid Interface by Ni_xS_y and Ni_xS_y/Carbon Nanotube Catalysts

2017

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NixSy (NiS and Ni17S18) nanoparticles and their nanocomposite with carbon nanotubes (NixSy/CNT) were synthesized by a modified hydrothermal method and characterized by X‐ray diffraction, Raman spectroscopy, scanning electron microscopy, and energy‐dispersive X‐ray microanalysis. The synthesized materials were used as hydrogen evolution catalysts at the water/1,2‐dichloroethane interface by using decamethylferrocene as a lipophilic electron donor. The hydrogen evolution reaction in biphasic systems was investigated by two‐phase reactions and by cyclic voltammetry with a four‐electrode system. A kinetic study of the hydrogen production was also performed. The rates of the reactions catalyzed by the NixSy nanoparticles and the NixSy/CNT nanocomposite were found to be about 690‐fold and 2000‐fold higher, respectively, than the rate for the reaction performed in the absence of a catalyst.

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A highly active hydrogen evolution electrocatalyst based on a cobalt–nickel sulfide composite electrode

Abstract: A cobalt–nickel sulfide composite electrode synthesized onto Ni foam through a facile thermal decomposition method showed remarkable activity towards electrocatalytic hydrogen production.

Cited by 55 publications

References 47 publications

Ni-based photocatalytic H2-production cocatalysts2

Ni-based photocatalytic H2-production cocatalysts2

Ultrathin Porous NiFeV Ternary Layer Hydroxide Nanosheets as a Highly Efficient Bifunctional Electrocatalyst for Overall Water Splitting

Enhanced Hydrogen Evolution Catalysis at the Liquid/Liquid Interface by Ni_xS_y and Ni_xS_y/Carbon Nanotube Catalysts

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A highly active hydrogen evolution electrocatalyst based on a cobalt–nickel sulfide composite electrode

Abstract: A cobalt–nickel sulfide composite electrode synthesized onto Ni foam through a facile thermal decomposition method showed remarkable activity towards electrocatalytic hydrogen production.

Cited by 55 publications

References 47 publications

Ni-based photocatalytic H2-production cocatalysts2

Ni-based photocatalytic H2-production cocatalysts2

Ultrathin Porous NiFeV Ternary Layer Hydroxide Nanosheets as a Highly Efficient Bifunctional Electrocatalyst for Overall Water Splitting

Enhanced Hydrogen Evolution Catalysis at the Liquid/Liquid Interface by NixSy and NixSy/Carbon Nanotube Catalysts

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Enhanced Hydrogen Evolution Catalysis at the Liquid/Liquid Interface by Ni_xS_y and Ni_xS_y/Carbon Nanotube Catalysts