Zn0.76Co0.24S/CoS2 nanowires array for efficient electrochemical splitting of water

Liang, Yanhui; Liu, Qian; Luo, Yonglan; Sun, Xuping; He, Yuquan; Asiri, Abdullah M.

doi:10.1016/j.electacta.2015.12.153

Cited by 97 publications

(43 citation statements)

References 48 publications

(47 reference statements)

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“…The catalytic activity of metal phosphide/chalcogenide‐based catalysts are mainly attributed to the proper surface of proton acceptor and hydride acceptor sites, leading to moderate bonding between sulphur/selenium/ phosphorus and reaction intermediates in the process of water splitting . Many efforts to fabricate these metal chalcogenide/phosphide based Janus electrodes have been made toward directly growing electrocatalysts on current collectors through hydrothermal deposition, electrodeposition, and chemical vapor deposition . Among them, the design of foam‐based bifunctional electrocatalysts were mainly concentrated on directly in situ synthesis of Ni x M y (M=S, Se, P) on the surface of foams (Ni or Cu foam) also acting as Ni or Cu source by one‐step hydrothermal process or CVD treatment.…”

Section: Water Splittingmentioning

confidence: 99%

Design and Application of Foams for Electrocatalysis

et al. 2017

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Developing low cost and efficient anode and cathode materials toward electrocatalysis are regarded as one of the most desirable yet challenging research directions, which are intimately related to the pressing energy, environmental and human health issues. Currently, 3 D foam (such as Ni foam, Cu foam, and graphene foam) based heterogeneous catalysts have been intensively explored for actively catalyzing the electrode reactions. Their inherent characteristics of stereo‐network structure, high specific area and large pore volume not only provide better mass transport of reactants to electrode surfaces, but also pave 3 D electron transport pathways. Herein, recent significant progress and rational design of foam‐based electrocatalysts are reviewed. In addition, some insights into current challenges and future directions of foams for efficient electrocatalysis are proposed and discussed.

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Section: Water Splittingmentioning

confidence: 99%

Design and Application of Foams for Electrocatalysis

et al. 2017

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“…The analysis of the Ni 2p 1/2 core likewise yielded the same information to corroborate the coexistence of Ni 3 + and Ni 2 + in Ni 3 S 4 . [21] In the B 1s spectrum in Figure 1f, the peak at binding energy of 191.8 eV suggests the presence of three-coordinated borate species. [20] The peak at the higher binding energy of 168.5 eV can be attributed to S species in high oxidation states common among sulfurcontaining compounds after exposure in air.…”

Section: Resultsmentioning

confidence: 96%

Electrochemical Performance of Borate‐Doped Nickel Sulfide: Enhancement of the Bifunctional Activity for Total Water Splitting

Zhang

Lee

2019

ChemElectroChem

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Electrolytic water splitting with solar electricity is one of the few technologies which can produce hydrogen with nearly zero carbon emission. The viability of the technology depends on the availability of low-cost alternatives to the platinum group metals (PGMs); which are the best known electrocatalysts for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). In this study, borate doping of nickel sulfide was found to yield catalysts which are effective for total water electrolysis. For the borate-doped nickel sulfides ((BO 3 ) x À Ni 3 S 4 , x = 0, 0.57, 0.78 and 1.08), the strong affinity of borate for hydroxyl groups facilitates the dissociation of adsorbed water molecules to oxygen. Consequently, the borate-doped nickel sulfide catalyst with the best performance in this study, (BO 3 ) 1.08 À Ni 3 S 4 , requires only a small overpotential of 306 mV to support a current density of 10 mA cm À 2 in OER. This, together with a small Tafel slope of 36.5 mV decade À 1 and a stable extended operation; places (BO 3 ) 1.08 À Ni 3 S 4 among the top non-PGM OER electrocatalysts reported to date. At the same time (BO 3 ) 1.08 À Ni 3 S 4 also shows good HER activity and stability for it to be used as a standalone catalyst for efficient total water splitting in alkaline electrolyte (1.69 V at 10 mA cm À 2 ).

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“…Figure b shows the high resolution XPS spectra of the Zn 2p state. The two peaks at 1044.9 and 1021.8 eV can be assigned to Zn 2p 1/2 and Zn 2p 3/2 , respectively . Subsequently, Figure c shows the high‐resolution spectrum of the Co with four peaks.…”

Section: Resultsmentioning

confidence: 96%

“…With the rapid depletion of the fossil fuels and environmental issue, the search of a clean and renewable resource has attracted great attention . As an ideal green energy carrier for fossil fuel, hydrogen energy possesses superior advantages of low‐cost, clean and sustainable .…”

Section: Introductionmentioning

confidence: 99%

Zn−Co−S Colloidal Nanocrystal Clusters as Efficient and Durable Bifunctional Electrocatalysts For Full Water Splitting

Zhao

Xing

et al. 2019

ChemNanoMat

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The synthesis of efficient, cost‐effective, and non‐toxic bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is highly needed for renewable energy related processes (conversion and storage). In the present work, we report a simple and straightforward one‐step hydrothermal strategy to prepare Zn−Co−S colloidal nanocrystal clusters (CNCs) for total water splitting (OER and HER activity) for the first time. The Zn−Co−S CNCs consist of a large number of interconnected nanoparticles forming spherical structures, which is very helpful for the electrochemical activity. Under alkaline conditions, the Zn−Co−S electrocatalyst demonstrates an excellent electrocatalytic activity by driving 10 mA cm−2 at 157 mV HER and 320 mV OER overpotentials, respectively. The Zn−Co−S catalyst electrode maintained the catalytic activity for 12 h exhibiting a good electrochemical stability. Furthermore, as fabricated two‐electrode alkaline water‐splitting system of Zn−Co−S//Zn−Co−S affords 10 mA cm−2 at a voltage of 1.64 V.

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Zn0.76Co0.24S/CoS2 nanowires array for efficient electrochemical splitting of water

Cited by 97 publications

References 48 publications

Design and Application of Foams for Electrocatalysis

Design and Application of Foams for Electrocatalysis

Electrochemical Performance of Borate‐Doped Nickel Sulfide: Enhancement of the Bifunctional Activity for Total Water Splitting

Zn−Co−S Colloidal Nanocrystal Clusters as Efficient and Durable Bifunctional Electrocatalysts For Full Water Splitting

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