Graphene oxide guiding the constructing of nickel-iron layered double hydroxides arrays as a desirable bifunctional electrocatalyst for HER and OER

Han, Xinqi; Suo, Na; Chen, Cheng; Lin, Zihan; Zhang, Dou; He, Xingquan; Cui, Lili

doi:10.1016/j.ijhydene.2019.09.116

Cited by 60 publications

(27 citation statements)

References 69 publications

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“…To date, various inexpensive earth-abundant catalysts have been explored as possible alternatives to noble-metal catalysts, including transitional metal oxides/hydroxides, − sulfides, − selenides, , and phosphides. − Among them, although transition-metal phosphides (TMPs) are promising due to their efficient catalytic performances, durability, and cost-effectiveness, − they still suffer from inferior catalytic performance and stability compared to noble-metal catalysts. To solve this, the reaction energy barrier for HER and OER of metal-phosphide-based catalysts needs to be optimized by improving the electron transfer during electrocatalysis and modifying their electronic structure via doping. − A previous theoretical study showed that nickel phosphide (Ni 3 P) can achieve a very low Gibbs free energy (Δ G H* ) level via structural and compositional engineering and by doping with Mo, Fe, and/or Co. − Thus, Δ G H* is a useful parameter for predicting the theoretical activity of catalysts: an ideal electrocatalyst should possess a low Δ G H* . − …”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Insights into Transition-Metal (Mo, Fe) Codoping in a Bifunctional Nickel Phosphide Microsphere Catalyst for Enhanced Overall Water Splitting

Pawar

Lee

Babar

et al. 2021

ACS Appl. Energy Mater.

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The facile synthesis of efficient non-precious-metal-based bifunctional catalysts for overall water splitting is highly desirable from both industrial and environmental perspectives. This study reports the electrodeposition and characterization of a transition-metal (Mo, Fe)-codoped nickel phosphide (Ni3P:FeMo) bifunctional catalyst for enhanced overall water splitting in an alkaline medium. The Ni3P:FeMo catalyst exhibited outstanding electrocatalytic performance for both the hydrogen evolution reaction and oxygen evolution reaction with low overpotentials of −103 and 290 mV, respectively, at a high current density of 100 mA/cm2 along with fast electrocatalytic kinetics. A full water-splitting electrolyzer consisting of a bifunctional Ni3P:FeMo catalyst required a low cell voltage of 1.48 V to attain a current density of 10 mA/cm2 with excellent stability for more than 50 h. Density functional theory calculations provided insights into the microscopic mechanism of the effective modulation of the p- and d-band centers of the P and Ni active sites by the Mo and Fe codoping of Ni3P, thereby enhancing the bifunctional catalytic activity of Ni3P.

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Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Insights into Transition-Metal (Mo, Fe) Codoping in a Bifunctional Nickel Phosphide Microsphere Catalyst for Enhanced Overall Water Splitting

Pawar

Lee

Babar

et al. 2021

ACS Appl. Energy Mater.

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“…In light of the low conductivity of the LDH structure, carbon materials or metal elements were introduced into electrocatalysts to effectively regulate the electronic structure and improve intrinsic conductivity . A graphene oxide guiding nickel and iron layered double hydroxide hybrid arrays (GO-FeNi-LDH) was proposed employing a one-step electrodeposition method, and the pretty 3D arrays with sheets vertically growing on nickel foam (NF) could be adjusted by controlling the quantity of GO as illustrated in Figure a. It was observed that the morphology of the as-prepared FeNi-LDH and GO-FeNi-LDH exhibited distinct morphology; The FeNi-LDH was uniformly electrodeposited on the surface of nickel foam with a wrinkled lamellar structure, while GO-FeNi-LDH showed regular arrays with interconnected thin sheets vertically growing on the substrates (Figure b).…”

Section: Water Splitting Reactionmentioning

confidence: 99%

“…(c) HRTEM image of the 0.8 GO-FeNi-LDH. (d) Polarization curves and (e)Tafel plots for various samples . Adapted with permission from ref .…”

Section: Water Splitting Reactionmentioning

confidence: 99%

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A Review on Advanced FeNi-Based Catalysts for Water Splitting Reaction

2020

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Water splitting as an advanced energy conversion technology driven by sustainable energy is attracting ever-increasing attention for clean hydrogen fuel generation from water. Two fundamental reactions, hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), are involved, and cost-effective catalysts are required to fulfill the energy transfer process. Nonprecious-metal catalysts have been proposed as the mainstay for future commercial applications. Among them, iron−nickel (FeNi)based catalysts are very promising benefiting from the FeNi synergistic interaction in promoting the basic reactions. With the help of rational structure design, composition optimization, and electronic state tuning, advanced catalysts based on FeNi have been extensively reported. Herein, we focus on the varied FeNi-based catalysts for water splitting reactions. Before reviewing the literature, some descriptors and perspective comments are first given in the parameter evaluation part that might be helpful for understating the catalytic capability. In light of the extensive reports, some typical examples of FeNi-based catalysts classified into FeNi-alloy, phosphides, oxides, layered double hydroxides, sulfides, tellurides, selenides, and fluorides are introduced in detail. Combined with these advanced catalysts and the performance evaluation, this review will be helpful for readers in understanding the advanced progress on FeNi-based catalysts for water splitting reaction. Problems and challenges are also discussed demonstrating that efficient catalysts that can maintain high activity and stability are still highly desired. A brief perspective on FeNi-based catalysts is proposed that we hope can be a good complement to the existing literature for a better understanding of FeNi-based catalysts for water splitting reaction.

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“…One of the feasible approaches is to combine with nanocarbon co-catalysts, such as 2D graphene and GDY, 1D CNTs or 0D CDs. With the above-discussed merits, nanocarbons as co-catalysts can not only offer electrically conductive pathways to LDHs but also gainfully enlarge the surface area for fast mass transfer, which is expected to significantly increase charge carriers separation, transfer, and injection efficiencies [144][145][146].…”

Section: Layered Double Hydroxides (Ldhs)mentioning

confidence: 99%

Nanocarbon-Enhanced 2D Photoelectrodes: A New Paradigm in Photoelectrochemical Water Splitting

et al. 2020

Nano-Micro Lett.

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Solar-driven photoelectrochemical (PEC) water splitting systems are highly promising for converting solar energy into clean and sustainable chemical energy. In such PEC systems, an integrated photoelectrode incorporates a light harvester for absorbing solar energy, an interlayer for transporting photogenerated charge carriers, and a co-catalyst for triggering redox reactions. Thus, understanding the correlations between the intrinsic structural properties and functions of the photoelectrodes is crucial. Here we critically examine various 2D layered photoanodes/photocathodes, including graphitic carbon nitrides, transition metal dichalcogenides, layered double hydroxides, layered bismuth oxyhalide nanosheets, and MXenes, combined with advanced nanocarbons (carbon dots, carbon nanotubes, graphene, and graphdiyne) as co-catalysts to assemble integrated photoelectrodes for oxygen evolution/hydrogen evolution reactions. The fundamental principles of PEC water splitting and physicochemical properties of photoelectrodes and the associated catalytic reactions are analyzed. Elaborate strategies for the assembly of 2D photoelectrodes with nanocarbons to enhance the PEC performances are introduced. The mechanisms of interplay of 2D photoelectrodes and nanocarbon co-catalysts are further discussed. The challenges and opportunities in the field are identified to guide future research for maximizing the conversion efficiency of PEC water splitting.

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Graphene oxide guiding the constructing of nickel-iron layered double hydroxides arrays as a desirable bifunctional electrocatalyst for HER and OER

Cited by 60 publications

References 69 publications

Experimental and Theoretical Insights into Transition-Metal (Mo, Fe) Codoping in a Bifunctional Nickel Phosphide Microsphere Catalyst for Enhanced Overall Water Splitting

Experimental and Theoretical Insights into Transition-Metal (Mo, Fe) Codoping in a Bifunctional Nickel Phosphide Microsphere Catalyst for Enhanced Overall Water Splitting

A Review on Advanced FeNi-Based Catalysts for Water Splitting Reaction

Nanocarbon-Enhanced 2D Photoelectrodes: A New Paradigm in Photoelectrochemical Water Splitting

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