Phase-Pure High-Entropy Spinel Oxide (Ni,Fe,Mn,Cu,Zn)3O4 via Thermal Plasma: A Promising Electrocatalyst for Oxygen Evolution Reaction DOI
Amarnath Pasupathi, Ragunath Madhu,

K. Praveen

et al.

ACS Applied Energy Materials, Journal Year: 2023, Volume and Issue: 6(11), P. 5899 - 5911

Published: May 18, 2023

High-entropy oxide (HEO) has recently emerged as a potential candidate material for electrochemical water splitting, with excellent activity and catalytic stability, an alternative to the state-of-the-art oxygen evolution reaction (OER) catalyst. The main characteristics of HEO are its unique structure ability tune physical, chemical, mechanical properties. On tuning these properties, it exhibits high thermal electrical conductivity, activity. In this work, by utilizing carbonaceous plasma Ar CO2 major plasma-forming gases, single-phase (NiFeMnCuZn)3O4 high-entropy been produced at discharge power 12 kW first time. as-synthesized powder was annealed various temperatures (300, 350, 400 °C) characterized using microscopic spectroscopic tools. dynamic light scattering study showed that had spinel average particle size ∼140 nm. synthesized materials were subjected electrocatalytic oxidation studies. results show 350 °C OER in 1 M KOH electrolyte, overpotential 308 mV current density 50 mA cm–2 Tafel slope 54 dec–1. Further, Operando-EIS analysis different potentials evidences shows less resistance toward charge-transfer kinetics interface. This work provides insight into rapid synthesis phase-pure electrocatalysts performance energy-related applications.

Language: Английский

Electrocatalysts for the hydrogen evolution reaction in alkaline and neutral media. A comparative review DOI Creative Commons
Martin Ďurovič, Jaromír Hnát, Karel Bouzek

et al.

Journal of Power Sources, Journal Year: 2021, Volume and Issue: 493, P. 229708 - 229708

Published: March 9, 2021

With interest in renewable energy sources and the decarbonisation of industry rapidly accelerating, alkaline water electrolysis can now be regarded as a key technology enabling efficient conversion storage. Since an environment is suitable for vast range materials with satisfactory chemical stability under operating conditions, topic catalysts route could give rise to confusion community. Hence, focus this review on analysing current situation electrocatalysis hydrogen evolution reaction neutral environment, presenting main group studied, discussing their potential achieve industrial relevance. It addresses limitations common parameters used evaluating comparing catalytic activity selected catalysts. Furthermore, provides comprehensive comparison catalyst activities respect individual groups depending composition well most cations cation-based materials. For sake clarity, also presented graphical form. Finally, based literature data, fundamental material characteristics evaluated development new electrochemical splitting are proposed.

Language: Английский

Citations

279
Recent progress in first row transition metal Layered double hydroxide (LDH) based electrocatalysts towards water splitting: A review with insights on synthesis DOI

Dipti Prava Sahoo,

Kundan Kumar Das,

Sriram Mansingh

et al.

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 469, P. 214666 - 214666

Published: July 1, 2022

Language: Английский

Citations

267
A NiCo LDH nanosheet array on graphite felt: an efficient 3D electrocatalyst for the oxygen evolution reaction in alkaline media DOI
Chen Ye, Longcheng Zhang,

Luchao Yue

et al.

Inorganic Chemistry Frontiers, Journal Year: 2021, Volume and Issue: 8(12), P. 3162 - 3166

Published: Jan. 1, 2021

A NiCo LDH nanosheet array on graphite felt is an efficient 3D OER catalyst with the need for overpotential of 249 mV to drive 20 mA cm−2 in 1.0 M KOH.

Language: Английский

Citations

203
Constructing a Hetero-interface Composed of Oxygen Vacancy-Enriched Co3O4 and Crystalline–Amorphous NiFe-LDH for Oxygen Evolution Reaction DOI
Junjun Lv,

Linmeng Wang,

Rushuo Li

et al.

ACS Catalysis, Journal Year: 2021, Volume and Issue: 11(23), P. 14338 - 14351

Published: Nov. 12, 2021

The development of high-performance electrocatalysts is a highly efficient strategy to optimize the sluggish kinetic property oxygen evolution reaction (OER). Herein, we synthesize kind nickel foam (NF)-supported electrocatalyst composed one-dimensional Co3O4 nanowire as core and two-dimensional NiFe-LDH nanosheet shell (denoted NiFe-60/Co3O4@NF). Fluorine introduced into precursor Co(OH)F Co3O4, which results in improved thermal stability significantly increased regularly distributed vacancies, while electrochemically deposited nanosheets possess crystalline/amorphous hybrid structure. As result, hetero-interface mainly constituting Ni species from contributes interaction between Co Fe facilitates electron transfer. Simultaneously, vacancies coordinatively unsaturated amorphous area also determined, finally completing backtracking. Benefiting these factors, only low overpotentials 221 257 mV are required deliver current densities 100 500 mA cm–2, respectively, with quite small Tafel slope 34.6 dec–1 during OER for well-designed NiFe-60/Co3O4@NF electrocatalyst.

Language: Английский

Citations

202
Nanostructured Metal Phosphide Based Catalysts for Electrochemical Water Splitting: A Review DOI
Pradnya M. Bodhankar, Pradip B. Sarawade, Prashant Kumar

et al.

Small, Journal Year: 2022, Volume and Issue: 18(21)

Published: March 13, 2022

Abstract Amongst various futuristic renewable energy sources, hydrogen fuel is deemed to be clean and sustainable. Electrochemical water splitting (EWS) an advanced technology produce pure in a cost‐efficient manner. The electrocatalytic evolution reaction (HER) oxygen (OER) are the vital steps of EWS have been at forefront research over past decades. low‐cost nanostructured metal phosphide (MP)‐based electrocatalysts exhibit unconventional physicochemical properties offer very high turnover frequency (TOF), low potential, mass activity with improved efficiency, long‐term stability. Therefore, they potential meet practical challenges for supporting future economy. This review discusses recent progress MP‐based catalysts emphasis given on in‐depth understanding catalytic innovative synthetic strategies through combined experimental (in situ/operando techniques) theoretical investigations. Finally, challenges, critical issues, outlook field electrolysis addressed.

Language: Английский

Citations

176
Tuning the intrinsic catalytic activities of oxygen-evolution catalysts by doping: a comprehensive review DOI Creative Commons
Sivasankara Rao Ede, Zhiping Luo

Journal of Materials Chemistry A, Journal Year: 2021, Volume and Issue: 9(36), P. 20131 - 20163

Published: Jan. 1, 2021

This review highlights doping effects on the intrinsic catalytic activities and oxygen evolution reaction mechanisms of state-of-the-art catalysts, including oxides, non-oxides carbon-based from experimental to theoretical studies.

Language: Английский

Citations

173
Enabling and Inducing Oxygen Vacancies in Cobalt Iron Layer Double Hydroxide via Selenization as Precatalysts for Electrocatalytic Hydrogen and Oxygen Evolution Reactions DOI
Arun Karmakar, Kannimuthu Karthick, Sangeetha Kumaravel

et al.

Inorganic Chemistry, Journal Year: 2021, Volume and Issue: 60(3), P. 2023 - 2036

Published: Jan. 22, 2021

Production of hydrogen by water electrolysis is an environment-friendly method and comparatively greener than other methods production such as stream reforming carbon, hydrolysis metal hydride, etc. However, sluggish kinetics the individual half-cell reactions hinders large-scale hydrogen. To minimize this disadvantage, finding appropriate, competent, low-cost catalyst has attracted attention worldwide. Layer double hydroxide (LDH)-based materials are promising candidates for oxygen evolution reaction (OER) but not fruitful their (HER) activity very poor, due to lack ionic conductivity. The inclusion chalcogenide generation inherent vacancies in lattice LDH lead improvement both OER HER activities. presence rich was confirmed using Tauc plot (1.11 eV, vacancy induction) photoluminescence study (peak at 426 nm, photoregeneration oxygen). In work, we have developed vacancy-enriched, selenized CoFe-LDH consequent wet-chemical hydrothermal routes, respectively, which used applications 1 M KOH 0.5 H2SO4 electrolytes, respectively. For OER, required only 251 mV overpotential reach a 50 mA/cm2 current density with Tafel slope value 47 mV/dec. HER, demanded 222 reaching 126 Hence, generating leads several advantages from enhancing exposed active sites high probability obtaining electrocatalytically species subsequent assistance molecule cleavage.

Language: Английский

Citations

117
Ultrafast Combustion Synthesis of Robust and Efficient Electrocatalysts for High-Current-Density Water Oxidation DOI
Deshuang Yu, Yixin Hao, Silin Han

et al.

ACS Nano, Journal Year: 2023, Volume and Issue: 17(2), P. 1701 - 1712

Published: Jan. 9, 2023

The scalable production of inexpensive, efficient, and robust catalysts for oxygen evolution reaction (OER) that can deliver high current densities at low potentials is critical the industrial implementation water splitting technology. Herein, a series metal oxides coupled with Fe

Language: Английский

Citations

112
Boosting of overall water splitting activity by regulating the electron distribution over the active sites of Ce doped NiCo–LDH and atomic level understanding of the catalyst by DFT study DOI
Hariharan N. Dhandapani, D. Mahendiran, Arun Karmakar

et al.

Journal of Materials Chemistry A, Journal Year: 2022, Volume and Issue: 10(34), P. 17488 - 17500

Published: Jan. 1, 2022

Ce 3+ ion doped NiCoLDHs have applied as a promising electrocatalysts for water splitting. 9.715 times high TOF has observed result of doping. DFT study shows that Co-3d states are highly responsible catalytic activity the catalyst.

Language: Английский

Citations

106
Oxygen vacancy enriched NiMoO4 nanorods via microwave heating: a promising highly stable electrocatalyst for total water splitting DOI
Arun Karmakar, Kannimuthu Karthick, Selvasundarasekar Sam Sankar

et al.

Journal of Materials Chemistry A, Journal Year: 2021, Volume and Issue: 9(19), P. 11691 - 11704

Published: Jan. 1, 2021

Vacancy enriched NiMoO 4 (V o ) nanorods have been synthesized by utilizing microwave heating. The oxygen vacancy has bought an excellent OER/HER activity and to reach 10 mA cm −2 , as anode cathode just required 360 mV overpotential.

Language: Английский

Citations

104