Enhancing electrocatalytic total water splitting at few layer Pt-NiFe layered double hydroxide interfaces

Anantharaj, Sengeni; Karthick, Kannimuthu; Venkatesh, Murugadoss; Simha, Tangella V. S. V.; Salunke, Ashish; Ma, Lian; Liang, Hong; Kundu, Subrata

doi:10.1016/j.nanoen.2017.06.027

Cited by 258 publications

(158 citation statements)

References 54 publications

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“…Unfortunately, NiFe LDH nanosheets exhibit poor HER activity in alkaline media, which limits their use as a bifunctional catalyst . Hence, it is desirable to promote the HER performance of NiFe LDH‐based bifunctional catalysts or electrodes, which could be achieved by combining the NiFe LDH nanosheets with other active components, leading to synergistic effects among different components …”

Section: Introductionsupporting

confidence: 91%

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NiFe Hydroxide Supported on Hierarchically Porous Nickel Mesh as a High‐Performance Bifunctional Electrocatalyst for Water Splitting at Large Current Density

et al. 2019

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The preparation of efficient and low‐cost bifunctional catalysts with superior stability for water splitting is a topic of significant current interest for hydrogen generation. A facile strategy has been developed to fabricate highly active electrodes with hierarchical porous structures by using a two‐step electrodeposition method, in which NiFe layered double hydroxide is grown in situ on a three‐dimensional hierarchical Ni mesh (NiFe/Ni/Ni). The as‐prepared NiFe/Ni/Ni electrodes demonstrate remarkable structural stability with high surface areas, effective gas transportation, and fast electron transfer. Benefiting from the unique structure, the self‐supported NiFe/Ni/Ni electrodes exhibit overpotentials of 190 mV and 300 mV for the oxygen evolution reaction (OER) at current densities of 10 and 500 mA cm−2, respectively. Furthermore, the self‐supported NiFe/Ni/Ni electrodes also exhibit high performance in the hydrogen evolution reaction (HER) and excellent stability at a current density of 500 mA cm−2 for both OER and HER. Remarkably, using NiFe/Ni/Ni as both the cathode and anode for alkaline water electrolysis, a current density of 500 mA cm−2 is attained at a cell voltage of 1.96 V. Additionally, the water electrolyzer demonstrates superior stability even at a large current density (500 mA cm−2) when subjected to high temperatures.

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Section: Introductionsupporting

confidence: 91%

“…Figure a shows the polarization curves of the four electrodes. Pt foil exhibited the best HER activity among the different samples, whereas NiFe/Ni exhibited poor HER activity, which was consistent with previous reports . However, the porous Ni film exhibited higher HER activity than NiFe/Ni and the bare Ni mesh (Figure S14).…”

Section: Resultsmentioning

confidence: 99%

NiFe Hydroxide Supported on Hierarchically Porous Nickel Mesh as a High‐Performance Bifunctional Electrocatalyst for Water Splitting at Large Current Density

et al. 2019

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“…It can be ascribed by that Cu 3 P, Cu 3 N and NPSC constituents are transformed into copper oxides/hydroxides, carbon oxides and remains vacancies in Cu 3 NÀ Cu 3 P/ NPSCNWs@NF electrode during the oxygen evolution reaction process, these copper oxides/hydroxides and vacancies can further enhance the electrocatalytic performance. [71][72][73][74][75] Moreover, the faradaic efficiency during the water splitting process are nearly 100 % ( Figure S14). Furthermore, the electro-conductivity of NPSC, Cu 3 N (111) and Cu 3 P (300) components were preliminary proved by the DFT simulations.…”

Section: Overall Water Splitting Under Alkaline Electrolytementioning

confidence: 99%

MOF‐Derived Copper Nitride/Phosphide Heterostructure Coated by Multi‐Doped Carbon as Electrocatalyst for Efficient Water Splitting and Neutral‐pH Hydrogen Evolution Reaction

et al. 2020

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Efficient and robust electrocatalysts composed of earth‐abundant elements to replace noble metals is highly essential for cost‐effective production of hydrogen from water splitting. Herein, we demonstrate the fabrication of SO42− anions bridged MOF‐derived Cu3N−Cu3P heterostructure coated by ultrathin N, P, S‐tri‐doped carbon (NPSC) on nickel foam (Cu3N−Cu3P/NPSCNWs@NF) via an interface reconstruction strategy. The first‐principle simulation demonstrates that both Cu3N, Cu3P and NPSC own good electrical conductivity, suggesting these species can lead to efficient electrocatalytic performance. The remarkable features of high intrinsic conductivity and interfacial heterostructures at Cu3N−Cu3P/NPSCNWs@NF have ensured excellent water splitting electrocatalytic activity with a low potential of 1.54 V at 10 mA cm−2 in 1 M KOH over 24 h, and additionally the resultant electrode exhibits impressive response for HER with an ultralow potential of 109 mV at 10 mA cm−2 in neutral‐pH media over 30 h.

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“…These LDH phases are more active than the spinel or rock salt type structures due to the fact they are readily oxidizable to metal hydroxide/oxyhydroxide interphase that is highly active for the OE reaction [8]. There have been different LDH phases such as Ni-Fe, Ni-Co, Co-Fe, Ni-Ni, Ni-Mn, Mn-Co, Co-Mn, and Co-Ni, which were reported as efficient OER catalysts in alkaline media [8][9][10][11]. These LDH phases are easily convertible to different oxide or spinel phases upon the removal of intercalated anions.…”

Section: Introductionmentioning

confidence: 99%

NiFeOx as a Bifunctional Electrocatalyst for Oxygen Reduction (OR) and Evolution (OE) Reaction in Alkaline Media

et al. 2018

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This article reports the two-step synthesis of NiFeOx nanomaterials and their characterization and bifunctional electrocatalytic activity measurements in alkaline electrolyte for metal-air batteries. The samples were mostly in layered double hydroxide at the initial temperature, but upon heat treatment, they were converted to NiFe2O4 phases. The electrochemical behaviour of the different samples was studied by linear sweep voltammetry and cyclic voltammetry on the glassy carbon electrode. The OER catalyst activity was observed for low mass loadings (0.125 mg cm−2), whereas high catalyst loading exhibited the best performance on the ORR side. The sample heat-treated at 250 °C delivered the highest bi-functional oxygen evolution and reduction reaction activity (OER/ORR) thanks to its thin-holey nanosheet-like structure with higher nickel oxidation state at 250 °C. This work further helps to develop low-cost electrocatalyst development for metal-air batteries.

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Enhancing electrocatalytic total water splitting at few layer Pt-NiFe layered double hydroxide interfaces

Cited by 258 publications

References 54 publications

NiFe Hydroxide Supported on Hierarchically Porous Nickel Mesh as a High‐Performance Bifunctional Electrocatalyst for Water Splitting at Large Current Density

NiFe Hydroxide Supported on Hierarchically Porous Nickel Mesh as a High‐Performance Bifunctional Electrocatalyst for Water Splitting at Large Current Density

MOF‐Derived Copper Nitride/Phosphide Heterostructure Coated by Multi‐Doped Carbon as Electrocatalyst for Efficient Water Splitting and Neutral‐pH Hydrogen Evolution Reaction

NiFeOx as a Bifunctional Electrocatalyst for Oxygen Reduction (OR) and Evolution (OE) Reaction in Alkaline Media

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