Co doped Ni0.85Se nanoparticles on RGO as efficient electrocatalysts for hydrogen evolution reaction

Xu, Peiman; Zhang, Jinming; Ye, Zhifeng; Liu, Yiyi; Cen, Tianlun; Yuan, Dingsheng

doi:10.1016/j.apsusc.2019.07.231

Cited by 49 publications

(22 citation statements)

References 33 publications

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“…In the paper by Xu et al Co-doped Ni0.85Se on reduced graphene oxide support was obtained after one-step hydrothermal treatment at 200 °C. If HER activities (Appendix B) of unsupported Ni0.85Se, Ni0.85Se/rGO, and Co-Ni0.85Se/rGO are compared, beneficial effects of both, Co-dopant and rGO support, are clearly revealed [85]. Calcination of cobalt nitrate, ammonium molybdate, and graphene oxide at 600 °C, reported by Ma et al, yielded material with two distinct phases -CoMoO4 and MoO2 -supported on reduced graphene oxide, with excellent HER performance, as can be seen in Appendix B.…”

Section: Supported Chalcogenides Hydroxides Pnictides and Carbidesmentioning

confidence: 99%

Hydrogen Evolution Reaction - From Single Crystal to Single Atom Catalysts

Gutić¹,

Dobrota²,

Fako³

et al. 2020

Preprint

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Hydrogen evolution reaction (HER) is one of the most important reaction in electrochemistry. This is not only because it is the simplest way to produce high purity hydrogen and the fact that it is the side reaction in many other technologies. HER actually shaped current electrochemistry because it was in focus of active research for so many years (and it still is). The number of catalysts investigated for HER is immense, and it is impossible to overview them all. In fact, it seems that the complexity of the field overcomes the complexity of HER. The aim of this review is to point out some of the latest developments in HER catalysis, current directions and some of the missing links between a single crystal, nanosized supported catalysts and, recently emerging, single atom catalysts for HER.3 of 36 HER at single crystal surfaces and bulk surfacesA crystalline solid can be considered as a series of mutually parallel lattice planes, arranged in a periodic way. Close to the surface, the spatial arrangement of the lattice planes, their crystallographic structure, as well as the dynamics of the constituent atoms may differ from the corresponding features in the bulk [1]. Most clean metals show the tendency to minimize their surface energy. One of the mechanisms is relaxation, the shift of one or more lattice planes located near to the surface, usually perpendicularly to the surface, so that the interlayer distance changes compared to the bulk lattice. The other one is reconstruction -change in equilibrium positions and bonding of surface atoms so that the projection of bulk unit cell to the given surface does not correspond to the surface unit cell. Different crystallographic planes (with different Miller indices) of the same metal exhibit unequal surface densities (number of atoms per surface area), and therefore undergo surface relaxation/reconstruction to different extents [2]. For example, Pt(100) has lower surface density compared to densely packed Pt(111) and therefore has a stronger tendency to relax/reconstruct. Since the main driving force for the mentioned surface modifications is the low coordination number (non-saturation) of surface atoms, it is obvious that atom/molecule adsorption on clean metal surfaces can have a significant effect on its surface structure, inducing relaxation/reconstruction changes. This is of huge importance for HER, as it involves adsorbed atomic hydrogen (Hads) as an intermediate. Additionally, in an electrochemical system, the electrode will be modified by adsorption of "spectator" species (ions/molecules from the electrolyte), so HER will not be taking place on clean metal surfaces, but rather on modified ones. Obviously, there is a complex dynamic interplay between the catalyst surface, reactants, intermediates, and electrolyte.According to the Sabatier principle, the interaction of the reaction reactants/intermediates with the catalyst has to be optimal in strength. If it is too weak, the reactants will not bind to the catalyst and the reaction will not be able to take place. In...

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Section: Supported Chalcogenides Hydroxides Pnictides and Carbidesmentioning

confidence: 99%

Hydrogen Evolution Reaction - From Single Crystal to Single Atom Catalysts

Gutić¹,

Dobrota²,

Fako³

et al. 2020

Preprint

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“…Amongst these compounds are a special class of chalcogenides (sulfide, selenide, telluride) where selenide has been reported to have the best catalytic activity because of its high metallic nature compared to sulfides [17,50]. However, this catalyst has been reported to have poor electronic conductivity, which limits its application in alkali conditioned systems [61][62][63]. To overcome this problem, different nanomaterials such as reduced graphene oxide (RGO), nickel foam (NF), cobalt sulfide (CoS), and carbon nanotubes (CNTs) have been incorpo-rated into the matrix of NiSe [34,61,[63][64][65].…”

Section: Modification Of Nickel Selenide Quantum Dotsmentioning

confidence: 99%

“…However, this catalyst has been reported to have poor electronic conductivity, which limits its application in alkali conditioned systems [61][62][63]. To overcome this problem, different nanomaterials such as reduced graphene oxide (RGO), nickel foam (NF), cobalt sulfide (CoS), and carbon nanotubes (CNTs) have been incorpo-rated into the matrix of NiSe [34,61,[63][64][65]. It is essential to highlight that modification of nanomaterials plays significant roles in enhancing the electrical conductivity, increasing stability, decreasing agglomeration, and increasing the catalytic properties of nanomaterials.…”

Section: Modification Of Nickel Selenide Quantum Dotsmentioning

confidence: 99%

“…The agglomeration of nickel selenide nanoparticles leads to a decrease in the number of active sites exposed, which in turn decreases the catalytic efficiency of the catalyst. The analytical merits of modification include higher electrical conductivity [63], improved catalytic activity [66], stability [67], increased strength and durability [63]. Hence, it is essential to modify the catalyst before employing them for various analytical applications.…”

Section: Modification Of Nickel Selenide Quantum Dotsmentioning

confidence: 99%

“…Electrochemical water splitting is one of the reactions that has gained worldwide attention because of its environmental friendliness and renewable nature [65,68]. This electrochemical reaction involves two half cells, which are oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) [28,63,68]. The results of the water-splitting reaction are oxygen and hydrogen, which are used in the production of renewable energy.…”

Section: General Applications Of Niseqdmentioning

confidence: 99%

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Nickel Selenide Quantum Dot Applications in Electrocatalysis and Sensors

et al. 2020

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Quantum dots (QDs) are semiconducting materials with diameters ranging from 2-10 nm. Amongst these QDs, nickel selenide quantum dot (NiSeQD) materials have gained much interest from researchers over the past few years due to their outstanding properties. These include excellent catalytic activity, good electrical conductivity for charge transfer, and excellent thermodynamic stability. NiSeQD material is relatively cheap, less toxic, and can be synthesised easily. Due to the fascinating and remarkable properties of NiSeQD, the material has been applied in various electrochemical fields, including hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and solar cells. This review focuses on the application of NiSeQD and its composites in the various analytical fields in the search for alternative renewable sources of energy. Interestingly, NiSeQD material can be modified with different materials to improve its sensitivity, reactivity, and limit of detection. The effects of modification with other materials such as iron (Fe), cobalt (Co), and graphene (GN) are mentioned. Additionally, the application of NiSeQD in glucose sensing is discussed briefly. In these aforementioned applications, NiSeQD has shown excellent electrocatalytic capability with satisfactory detection limits and good conductivity. Thus, further exploration of it to other fields is essential. This review highlights the importance of NiSeQD in water purification, and no report has been documented in the literature on its application in water purification. Some gaps are still open for the use of NiSeQD material as an electroactive platform for sensing devices in water treatment.

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Tuning Catalytic Performance of C₂N/GaN Heterostructure for Hydrogen Evolution Reaction by Doping

Han

Yang

Wei

et al. 2023

Advcd Theory and Sims

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In this work, a systematic theoretical study of the hydrogen evolution reaction (HER) catalytic activity of C2N/GaN heterostructure is carried out based on first principles. An indirect bandgap of 1.99 eV and type‐II band alignment are formed in the C2N/GaN heterostructure, which can facilitate the spatially efficient separation of photogenerated carrier pairs, and the band edge position matches the reduction potential of water. The catalytic performance of the HER reaction at the C and N sites is compared and that the N site is better in performance is found, but still requires a potential barrier of 0.60 eV. In order to improve the catalytic performance of the C2N/GaN heterostructure, an N atom is replaced by a P atom to obtain P‐C2N/GaN. The band alignment of the P‐C2N/GaN heterostructure is still type‐II, and the band edges satisfy the reduction potential of water. Fortunately, the P or N sites play a crucial role in the HER process with a relatively low overpotential of 0.38 eV, which suggests that P‐C2N/GaN can improve the catalytic performance of the heterojunction. Overall, the P‐C2N/GaN heterostructure has suitable band gap values and band edges, and efficient charge separation in the heterostructure makes it a promising HER catalyst.

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Co doped Ni0.85Se nanoparticles on RGO as efficient electrocatalysts for hydrogen evolution reaction

Cited by 49 publications

References 33 publications

Hydrogen Evolution Reaction - From Single Crystal to Single Atom Catalysts

Hydrogen Evolution Reaction - From Single Crystal to Single Atom Catalysts

Nickel Selenide Quantum Dot Applications in Electrocatalysis and Sensors

Tuning Catalytic Performance of C₂N/GaN Heterostructure for Hydrogen Evolution Reaction by Doping

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Co doped Ni0.85Se nanoparticles on RGO as efficient electrocatalysts for hydrogen evolution reaction

Cited by 49 publications

References 33 publications

Hydrogen Evolution Reaction - From Single Crystal to Single Atom Catalysts

Hydrogen Evolution Reaction - From Single Crystal to Single Atom Catalysts

Nickel Selenide Quantum Dot Applications in Electrocatalysis and Sensors

Tuning Catalytic Performance of C2N/GaN Heterostructure for Hydrogen Evolution Reaction by Doping

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Product

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Tuning Catalytic Performance of C₂N/GaN Heterostructure for Hydrogen Evolution Reaction by Doping