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

Cobalt containing bimetallic ZIFs and their derivatives as OER electrocatalysts: A critical review DOI

Asim Shahzad,

Faiza Zulfiqar, Muhammad Arif Nadeem

et al.

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 477, P. 214925 - 214925

Published: Nov. 25, 2022

Language: Английский

Citations

96
Direct Synthesis of Stable 1T‐MoS2 Doped with Ni Single Atoms for Water Splitting in Alkaline Media DOI
Guowei Wang,

Guikai Zhang,

Xiaoxing Ke

et al.

Small, Journal Year: 2022, Volume and Issue: 18(16)

Published: March 15, 2022

Abstract Metallic MoS 2 (i.e., 1T‐MoS ) is considered as the most promising precious‐metal‐free electrocatalyst with outstanding hydrogen evolution reaction (HER) performance in acidic media comparable to Pt. However, sluggish kinematics of HER alkaline and its inability for oxygen (OER), hamper development bifunctional catalysts. The instability further impedes applications scaling up, calling an urgent need simple synthesis produce stable . In this work, challenge first addressed using a direct one‐step hydrothermal method by adopting ascorbic acid. flower‐like morphology obtained, transition metals (Ni, Co, Fe) are simultaneously doped into Ni‐1T‐MoS achieves enhanced catalytic activity both OER media, where key role Ni doping single atom proved be essential boosting HER/OER activity. Finally, ||Ni‐1T‐MoS electrolyzer fabricated, reaching current density 10 mA cm −2 at applied cell voltage only 1.54 V overall water splitting.

Language: Английский

Citations

94
Efficient electrocatalysis for oxygen evolution: W-doped NiFe nanosheets with oxygen vacancies constructed by facile electrodeposition and corrosion DOI Creative Commons

Huixi Li,

Chenyang Zhang,

Weijun Xiang

et al.

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 452, P. 139104 - 139104

Published: Sept. 9, 2022

Language: Английский

Citations

89
Stabilization of ruthenium nanoparticles over NiV-LDH surface for enhanced electrochemical water splitting: an oxygen vacancy approach DOI
Arun Karmakar, Kannimuthu Karthick, Selvasundarasekar Sam Sankar

et al.

Journal of Materials Chemistry A, Journal Year: 2022, Volume and Issue: 10(7), P. 3618 - 3632

Published: Jan. 1, 2022

Oxygen vacancy assisted stabilization of Ru@NiV-LDH was achieved via wet chemical methods. showed an excellent water splitting activity. DFT analysis confirmed the Ru NPs over LDH surface by 3.8 ± 0.5 eV adsorption energy.

Language: Английский

Citations

85
A comprehensive review on LDH-based catalysts to activate persulfates for the degradation of organic pollutants DOI Creative Commons
Eman M. Abd El-Monaem,

Hala M. Elshishini,

Sara S. Bakr

et al.

npj Clean Water, Journal Year: 2023, Volume and Issue: 6(1)

Published: April 25, 2023

Abstract Degradation of organic contaminants into less toxic substances is the best option to remove these compounds rather than using conventional techniques. The sulfate radical-based-advanced oxidation process an effective strategy that degrades by activating peroxymonosulfate (PMS). Such a generates singlet oxygen ( 1 O 2 ), hydroxyl $$^ \bullet \!{{{\mathrm{OH}}}}$$ ∙OH and $${{{\mathrm{SO}}}}_4^{ \bullet\! - }$$ xmlns:mml="http://www.w3.org/1998/Math/MathML">SO4∙− ) radicals. \!- distinguished its high selectivity activity toward degradation contaminates compared other Various catalysts are employed in PMS activation including layered doubled hydroxides (LDHs), which characterized their facile synthesis catalytic activity. This review article first attempt compile recent progress common pollutants aromatic compounds, pharmaceutical residues, dyes via LDH-based catalysts. pathways, reaction parameters’ influence, stability LDHs, comparisons between different investigated this work.

Language: Английский

Citations

82
Vanadium-Doped Nickel Cobalt Layered Double Hydroxide: A High-Performance Oxygen Evolution Reaction Electrocatalyst in Alkaline Medium DOI
Krishnendu Bera, Arun Karmakar, Sangeetha Kumaravel

et al.

Inorganic Chemistry, Journal Year: 2022, Volume and Issue: 61(10), P. 4502 - 4512

Published: March 1, 2022

Vast attention from researchers is being given to the development of suitable oxygen evolution reaction (OER) electrocatalysts via water electrolysis. Being highly abundant, use transition-metal-based OER catalysts has been attractive more recently. Among various electrocatalysts, layered double hydroxides (LDHs) gained special owing their high stability under conditions. In this work, we have reported synthesis trimetallic NiCoV-LDH a simple wet-chemical method. The synthesized possesses aggregated sheet-like structures and screened for studies in alkaline medium. study activity, as-prepared catalyst demanded 280 mV overpotential was 42 less than essential pristine NiCo-LDH. Moreover, doping third metal into NiCo-LDH system might lead an increase TOF values by almost three times. Apart this, electronic structural evaluation confirms that V3+ could synergistically favor electron transfer among ions, which turn increases activity prepared toward OER.

Language: Английский

Citations

74
Hollow Heterostructured Nanocatalysts for Boosting Electrocatalytic Water Splitting DOI
Lin Tian, Yuanyuan Liu, Changchun He

et al.

The Chemical Record, Journal Year: 2022, Volume and Issue: 23(2)

Published: Oct. 4, 2022

The implementation of electrochemical water splitting demands the development and application electrocatalysts to overcome sluggish reaction kinetics hydrogen/oxygen evolution (HER/OER). Hollow nanostructures, particularly for hollow heterostructured nanomaterials can provide multiple solutions accelerate HER/OER owing their advantageous merit. Herein, recent advances nanocatalysts excellent performance are systematically summarized. Starting by illustrating intrinsically features heterostructures, achievements in engineering also highlighted with focus on structural design, interfacial engineering, composition regulation, catalytic evaluation. Finally, some perspective insights future challenges electrocatalytic discussed.

Language: Английский

Citations

74
A concise perspective on the effect of interpreting the double layer capacitance data over the intrinsic evaluation parameters in oxygen evolution reaction DOI
Arun Karmakar, Subrata Kundu

Materials Today Energy, Journal Year: 2023, Volume and Issue: 33, P. 101259 - 101259

Published: Feb. 1, 2023

Language: Английский

Citations

69
Review and Outlook of Hydrogen Production through Catalytic Processes DOI Open Access
Ravi Kumar, Rohini Singh, Suman Dutta

et al.

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(4), P. 2601 - 2629

Published: Jan. 28, 2024

Hydrogen holds immense potential as a sustainable energy source result of its eco-friendliness and high density. Thus, hydrogen can solve the environmental challenges. However, it is crucial to produce using approaches in cost-efficient manner. Currently, be produced by utilizing diverse feedstocks, such natural gas, methane, ammonia, smaller organic molecules (methanol, ethanol, glycerol, formic acid), biomass, water. These feedstocks undergo conversion into through different catalytic processes, including steam reforming, pyrolysis, decomposition, gasification, electrolysis, photo-assisted methods (photoelectrochemical, photocatalysis, biophotolysis). Researchers have extensively explored various catalysts, metals, alloys, oxides, non-oxides, carbon-based materials, metal–organic frameworks, for these methods. The primary objectives been attain higher activity, selectivity, stability, cost effectiveness generation. efficacy processes significantly dependent upon performance emphasizing need further research development create more efficient catalysts. during production, gases like CO2, O2, CO, N2, etc. are alongside hydrogen. Separation techniques, pressure swing adsorption, metal hydride separation, membrane employed obtain high-purity Furthermore, techno-economic analysis indicates that production reforming gas/methane currently viable commercially successful. Photovoltaic electrolysis has commercialized, but still higher. Meanwhile, other phase hold future commercialization.

Language: Английский

Citations

57
Novel palladium-based nanomaterials for multifunctional ORR/OER/HER electrocatalysis DOI

Hangxuan Li,

Ge Li

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(17), P. 9383 - 9400

Published: Jan. 1, 2023

This review covers recent advances in novel palladium-based nanomaterials for multifunctional ORR/OER/HER electrocatalysis. Challenges are critically evaluated and strategies to solve current problems summarized.

Language: Английский

Citations

54