A Knowledge-Based Molecular Single-Source Precursor Approach to Nickel Chalcogenide Precatalysts for Electrocatalytic Water, Alcohol, and Aldehyde Oxidations DOI Creative Commons
Basundhara Dasgupta, Shenglai Yao, Indranil Mondal

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 3, 2024

The development and comprehensive understanding of nickel chalcogenides are critical since they constitute a class efficient electro(pre)catalysts for the oxygen evolution reaction (OER) value-added organic oxidations. This study introduces knowledge-based facile approach to analogous NiE (E = S, Se, Te) phases, originating from molecular β-diketiminato [Ni2E2] complexes their application OER recorded activity trends both target reactions follow order NiSe > NiS NiTe. Notably, displayed performance selective oxidation benzyl alcohol 5-hydroxymethylfurfural, exhibiting stability in 11 days under industrially pertinent conditions. Comprehensive analysis, including quasi situ X-ray absorption Raman spectroscopy, combination with several ex techniques, revealed material reconstruction process alkaline conditions, involving chalcogen leaching. While experienced full leaching into NiIII/IV oxyhydroxide active phases intercalated potassium ions, transformation NiTe is incomplete. highlights structure–activity relationship whole series chalcogenides, directly linking availability sites catalysis. Such findings hold great promise electrocatalysts wide range applications, impacting various industrial processes sustainable energy solutions.

Language: Английский

Unveiling the origin of high catalytic activity of WO3/MWCNT nanocomposites for the hydrogen evolution reaction DOI

Nitesh Dogra,

Sunil Singh Kushvaha, Avijit Dewasi

et al.

Catalysis Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The electrocatalytic performance of the hydrogen evolution reaction (HER) largely relies on lower Tafel slope and overpotential values.

Language: Английский

Citations

0
Ag on NiCo Layered Double Hydroxide as Oxygen Evolution Electrocatalyst for Anion Exchange Membrane Water Electrolyzer Under Large Current Densities DOI
Yan Sun, Guanghao Chen, Fatima El Bachraoui

et al.

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: March 30, 2025

Abstract A facile and universal strategy is employed to synthesize Ag decorated NiCo layered double hydroxide (LDH) heterogeneous structure for the oxygen evolution reaction (OER). The nanoparticles are deposited on LDH nanosheets via a spontaneous redox reaction. synthesized Ag/NiCo achieves an overpotential of 460 mV at current density 1 cm −2 geo , surpassing that (722 mV). In anion exchange membrane water electrolyzer (AEMWE) with as anode Pt/C cathode, cell can deliver ultrahigh 5 low voltage 2.10 V. This superior nearly four times larger than AEMWEs other non‐precious electrocatalysts reported in literature under same effective area. Furthermore, it exhibits desired durability no performance decay over 300 h which almost six longer IrO 2 anode. Operando electrochemical impedance spectroscopy results reveal decoration facilitates active site formation reduces OER onset potential compared LDH. study showcases practical approach designing highly durable industrial hydrogen production.

Language: Английский

Citations

0
Two-dimensional Nanomaterial-based Heterogeneous Catalysts for Sustainable Ammonia Production DOI
Akshay Thakur, Sudripet Sharma, Ashish Kumar

et al.

Royal Society of Chemistry eBooks, Journal Year: 2025, Volume and Issue: unknown, P. 259 - 278

Published: April 4, 2025

Two-dimensional (2D) nanomaterials have attracted tremendous attention from researchers working in the field of heterogeneous catalysis. Owing to unique advantages offered by 2D nanomaterials, such as high surface area, abundant reaction sites, improved electrical and optical properties, excellent support materials, etc., they been widely utilized synthesizing several hybrid materials different catalytic applications. This chapter focuses, particular, on application nanomaterial-based catalysts sustainable ammonia (NH3) synthesis. In recent years, research has delved into establishing new technologies for green NH3 synthesis a replacement conventional Haber–Bosch process. this chapter, three approaches, namely, photocatalysis, electrocatalysis, photoelectrocatalysis, are discussed detail. Some examples composites, doped systems, defect-engineered presented provide glimpse these processes. Finally, summary progress an outline future directions production discussed.

Language: Английский

Citations

0
Near-Infrared Multifunctional Antitumor Nanomaterial of Bismuth Sulfide Heterojunction Coupled with Mesoporous Polydopamine DOI

Juanxuan Guo,

Biling Chen,

Menglong Zhao

et al.

ACS Applied Bio Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 8, 2025

Bismuth sulfide@bismuth nanorods (Bi2S3@Bi NRs) have emerged as promising photodynamic therapeutic agents due to Bi2S3@Bi being able produce reactive oxygen species from self-supplied O2. Combining photothermal and therapies with chemotherapy is attractive but difficult achieve. Here, we develop a subtle method wrap NRs mesoporous polydopamine, where drug doxorubicin hydrochloride can be loaded, thus providing multifunctional antitumor nanospheres. To our delight, the prepared triple-functional material exhibits excellent efficacy toward tumor cells under near-infrared light irradiation. This nanomaterial not only biocompatible also suitable for hypoxic microenvironments, having much better than single- or double-functional materials. study highlights great potential of combining photothermal, photodynamic, chemotherapies.

Language: Английский

Citations

0
Hierarchical Flower Array NiCoOOH@CoLa‐LDH Nanosheets for High‐Performance Supercapacitor and Alkaline Zn Battery DOI Open Access
Ding Zhang,

Yingjie Hua,

Xue Fu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 30, 2024

Abstract Nickel oxyhydroxide based energy storage materials have been largely confined by insufficient exposure of active sites which results in low efficiency and poor stability. In order to resolve the problems, hierarchical flower array heterostructure NiCoOOH@CoLa‐LDH (denoted as NC@CL) nanosheets are designed with NiCo (NiCoOOH, denoted NC) being tightly covered on CoLa layered double hydroxide (CoLa‐LDH, CL) nanosheet. This rational design creates more sites, enlarges electrode‐electrolyte contact area, improves electron conductivity, prevents agglomeration during cycling charge–discharge processes. Density functional theory calculations differential charges concurrently illustrate that formation optimizes reaction kinetics promotes redistribution. Benefiting from heterogeneous structure rich electro‐active caused NC, NC@CL displays outstanding reversible specific capacitance (3228 F g −1 at 1 A ). The aqueous rechargeable alkaline Zn battery NC@CL//Zn exhibits a high capacity 381.1 mA h 0.5 durability (98% retention after 5 for 2000 cycles). excellent electrochemical performances indicate has great application potential electrode material device.

Language: Английский

Citations

3
Efficient Electrocatalytic Ammonia Synthesis via Theoretical Screening of Titanate Nanosheet-Supported Single-Atom Catalysts DOI Open Access

Kaiheng Zhao,

Jingnan Wang, Yongan Yang

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(10), P. 2239 - 2239

Published: May 9, 2024

The electrocatalytic nitrogen reduction reaction (NRR) for synthesizing ammonia holds promise as an alternative to the traditional high-energy-consuming Haber-Bosch method. Rational and accurate catalyst design is needed overcome challenge of activating N2 suppress competitive hydrogen evolution (HER). Single-atom catalysts have garnered widespread attention due their 100% atom utilization efficiency unique catalytic performance. In this context, we constructed theoretical models metal single-atom supported on titanate nanosheets (M-TiNS). Initially, density functional theory (DFT) was employed screen 12 NRR- HER-related barriers, leading identification theoretically optimal NRR catalyst, Ru-TiNS. Subsequently, experimental synthesis Ru-TiNS successfully achieved, exhibiting excellent performance in catalyzing NRR, with highest NH3 yield rate reaching 15.19 μmol mgcat-1 h-1 a Faradaic (FE) 15.3%. combination results calculations demonstrated efficient ability Ru sites, validating effectiveness screening process providing foundation catalysts.

Language: Английский

Citations

1
Symmetry-Breaking Structure Electrocatalysts for Nitrate Reduction to Ammonia DOI
Yifan Han, Jiachangli Shang, Shuai Yin

et al.

Green Chemistry, Journal Year: 2024, Volume and Issue: 26(14), P. 8145 - 8160

Published: Jan. 1, 2024

This tutorial review highlights the advancement of emerging electrocatalysts featuring unique symmetry-breaking structures for nitrate reduction to ammonia.

Language: Английский

Citations

1
Electronic Engineering of Crystalline/Amorphous CoP/FeCoPx Nanoarrays for Efficient Water Electrolysis DOI
Jinyang Zhang, Yujing Zhang,

Jiayi Zhou

et al.

Small Methods, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 5, 2024

Abstract The development of bifunctional, non‐noble metal‐based electrocatalysts for hydrogen evolution reaction (HER) and oxygen (OER) through morphology electronic engineering is highly attractive efficient water splitting. Herein, hierarchical nanoarrays consisting crystalline cobalt phosphide nanorods covered by amorphous Fe‐doped nanocuboids (CoP/FeCoP x ) are constructed as bifunctional catalysts both HER OER. Experimental results theoretical calculations reveal that the exhibit balanced dual‐catalytic properties due to simultaneous introduction Fe doping phosphorus vacancies, leading an optimized structure CoP/FeCoP . Furthermore, made crystalline/amorphous heterostructures significantly enhance performance electrocatalysts. As a result, catalyst demonstrates remarkable in OER, with overpotentials 74 237 mV at 10 mA cm −2 1 m KOH, respectively, well low cell voltage 1.53 V alkaline overall This work integrates involving design vacancies electrolysis. It may open new route toward rational feasible fabrication high‐performance, multifunctional, energy conversion.

Language: Английский

Citations

1
Integrated experimental and DFT-based study on pH-dependent photoelectrochemical performance of Ca2Fe2O5 DOI
Young‐Min Kim, Minseok Kang, Min-Seok Kim

et al.

Applied Surface Science, Journal Year: 2024, Volume and Issue: 681, P. 161437 - 161437

Published: Oct. 16, 2024

Language: Английский

Citations

1
Efficient Photocatalytic Reduction of Hexavalent Chromium by NiCo2S4/BiOBr Heterogeneous Photocatalysts DOI Open Access

Shumeng Qin,

Ruofan Xu,

Jin Qiu

et al.

Coatings, Journal Year: 2024, Volume and Issue: 14(12), P. 1492 - 1492

Published: Nov. 27, 2024

For typical Cr(VI)-containing industrial wastewater, more efficient water treatment technologies need to be used ensure that Cr(VI) concentrations are reduced safe levels before discharge. Photocatalytic technology is highly efficient, environmentally friendly, and has been extensively address this demand. Herein, heterogeneous NiCo2S4/BiOBr photocatalysts with different ratios were prepared using a solvothermal method. When compared pure NiCo2S4 BiOBr, the NiCo2S4/BiOBr-30 had significantly increased adsorption capacity visible-light-driven photocatalytic reduction activity for removal. The improved performance of was mainly due its specific surface area, enhanced could attributed separation transfer photogenerated carriers at interface. Lastly, possible mechanism heterostructure developed.

Language: Английский

Citations

1