Construction of high activity electrocatalyst for alkaline hydrogen evolution by doping magnetic Fe3O4 with RuO2 DOI

Xiujing Kou,

Yiyi Qi,

Haiyan Pang

et al.

Physica Scripta, Journal Year: 2024, Volume and Issue: 99(8), P. 085304 - 085304

Published: July 18, 2024

Abstract The rational build of hydrogen evolution reaction (HER) electrocatalyst with low-cost, highly efficient, and excellent stability is the key to realizing electrochemical decomposition water. Herein, optimal ratio between RuO 2 Fe 3 O 4 for high-activity electrocatalysts (RuO /Fe hybrid nanoparticles) was obtained by microemulsion method. morphology structure characterization show uniform distribution (average particle size ∼35.0 ± 5.1 nm) high crystallinity nanoparticles. Compared (2:1) (1:2) samples, tests that (1:1) exhibit favorable HER catalytic activity (overpotential: 181 mV at 10 mA cm −2 ; Tafel slope: 130 dec −1 ) (no obvious attenuation during 20 h) in an alkaline medium. mechanism analysis implies doping accelerated electron transfer rate thus increased via results impedance spectroscopy (EIS) tests. Blending appropriate amount into can not only reduce cost but also improve electrocatalytic HER, which expected give guidance development stable nanostructured electrolytes.

Language: Английский

Rational Design Principles of Single-Atom Catalysts in Hydrogen Production and Hydrogenation DOI
Zhidong Wang, Xinyue Yuan, Han Guo

et al.

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

This review summarizes the research progress of single-atom catalysts (SACs) in hydrogen production and hydrogenation, proposes rational design principles SACs for hydrogenation firstly.

Language: Английский

Citations

9
Lanthanides in the water electrolysis DOI Creative Commons
Ashish Gaur,

Jatin Sharma,

Enkhtuvshin Enkhbayar

et al.

EcoMat, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 12, 2024

Abstract The most feasible technique for producing green hydrogen is water electrolysis. In recent years, there has been significant study conducted on the use of transition metal compounds as electrocatalysts both anodes and cathodes. Peoples have attempted several strategies to improve electrocatalytic activity their original structure. One such involves introducing rare earth metals or creating heterostructures with based metals. incorporation significantly enhances by many folds, while offer structural stability ability manipulate electronic properties system. These factors led a boom in investigations metal‐based electrocatalysts. There currently pressing demand review article that can provide comprehensive overview scientific advancements elucidate mechanistic aspects impact lanthanide doping. This begins explaining structure lanthanides. We next examine aspects, followed doping heterostructure formation electrolysis applications. It expected this particular effort will benefit broad audience stimulate more research area interest. image

Language: Английский

Citations

4
Unlocking Peak Efficiency in Anion‐Exchange Membrane Electrolysis with Iridium‐Infused Ni/Ni2P Heterojunction Electrocatalysts DOI Open Access
Balaji S. Salokhe, Thanh Tuan Nguyen, Rahul Rawat

et al.

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

Published: Jan. 29, 2025

Abstract Developing cost‐effective, highly efficient, and durable bifunctional electrocatalysts for water electrolysis remains a significant challenge. Nickel‐based materials have shown promise as catalysts, but their efficiency in alkaline electrolytes is still lacking. Fascinatingly, Mott–Schottky catalysts can fine‐tune electron density at interfaces, boosting intermediate adsorption facilitating desorption to reduce the energy barrier. In this study, iridium‐implanted Ni/Ni 2 P nanosheets (Ir SA –Ni/Ni P) introduced, which are delivered from metal–organic framework employ them devices. This catalyst requires small 54 mV overpotential hydrogen evolution reaction (HER) 192 oxygen (OER) reach 10 mA·cm −2 1.0 m KOH electrolyte. Density functional theory (DFT) calculations reveal that incorporation of Ir atoms with enriched interfaces between Ni promote active sites be favorable HER OER. discovery highlights most likely reactive offers valuable blueprint designing efficient stable tailored industrial‐scale electrolysis. The ‐Ni/Ni electrode exhibits exceptional current outstanding stability single‐cell anion‐exchange membrane electrolyzer.

Language: Английский

Citations

0
High Crystalline MxSby (M═Fe, Co, and Ni) Nanocrystals Tuned by Antimony for Boosting Overall Water Splitting Catalysis DOI Open Access
Yan Zhang,

Jiwen Si,

Zihan Chen

et al.

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 2, 2025

Abstract Six types of M x Sb y compounds (Fe, Co, and Ni antimonides) are synthesized in form mono‐dispersed nanocrystallites (NCs) via a hot‐injection metathesis‐reduction. Various contents atoms found to drive crystallographic structure re‐coordination the materials, leading rhythmical changes orthorhombic 3 Sb→hexagonal MSb→monoclinic (or orthorhombic) MSb 2 . The crystallography is identified as crucial factor electrocatalysis water splitting at cathodic anodic electrodes, respectively. Owning in‐plane microstrain distributed along (001) plane, NCs more suitable catalyzing hydrogen evolution reaction (HER), sharing overpotential (η 10 ) 93 mV@10 mA cm −2 with Tafel slope 45 mV dec −1 , extremely low adsorption resistance (0.019 Ω) obtained. FeSb featured larger deprotonation capacity 13.71 mC V excelled oxygen (OER) electrolysis, confirmed facilitate minimal deformation OOH * integrated devices (FeSb ‖Ni Sb) tested efficient catalyst for overall (1.58 V@10 long stability. Density functional theory (DFT) calculations elucidated particular coordination proper electronegativity (2.05) able adjust active sites, relax electronic attraction, benefit electrochemical reactions.

Language: Английский

Citations

0
Tensile-strain-driven interstitial Ru doping structure on an FeCoP/FF electrode accelerates the reaction kinetics of water electrolysis DOI

Lu Zhan,

Yanru Liu, Guizhong Zhou

et al.

Green Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This work creatively developed a strain-driven interstitial Ru doping strategy to synthesize an interstitially doped-FeCoP/FF electrode with 2.32% tensile strain.

Language: Английский

Citations

0
Support Regulation Strategy Synergistic with Ru Single-Atom Catalyst for Energy-Saving Hydrogen Production Assisted by Green Electrosynthesis of Azotetrazolate DOI

Yaqi Qin,

Kui Du, Yuqiu Wang

et al.

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 25, 2025

The slow kinetics of the oxygen evolution reaction limits electrochemical overall water splitting (OWS). To address this, integrating thermodynamically favorable organic electro-oxidation with hydrogen (HER) can enhance production performance. Notably, 5-amino-1H-tetrazole oxidation-assisted OWS not only achieves energy-saving but also produces energetic compound 5,5'-azotetrazolate salts in a mild manner. This necessitates in-depth research into catalysts straightforward synthesis methods and excellent performance for production. Supported single-atom (SACs) have high dispersibility reduce use precious metals. Here, we report highly efficient HER catalyst consisting Ru single atom anchored on low-crystallinity Zn-doped Ni2P nanosheets (Ru-LC-ZNP). low overpotential 28.9 mV at -10 mA cm-2, demonstrating stability least 100 h no noticeable activity loss. experimental results indicate that outstanding alkaline be attributed to synergistic optimization between support. By coupling 5-AT electro-oxidation, cell voltage electrolysis enormously reduced 1.26 V 10 cm-2. work provides insights mechanism supported SACs as active catalysts.

Language: Английский

Citations

0
Pnictogenation‐Driven Exsolution of Size‐Tunable Ru Electrocatalysts in Conductive Matrices to Reinforce Inner‐Sphere‐Mechanism‐Assisted Electronic Coupling DOI Creative Commons
Dong Sun,

So Yeon Yun,

Xiaoyan Jin

et al.

Carbon Energy, Journal Year: 2025, Volume and Issue: unknown

Published: April 29, 2025

ABSTRACT The exsolution method has garnered significant attention owing to its high efficacy in developing highly efficient and stable metal nanocatalysts. Herein, a versatile approach is developed embed size‐tunable nanocatalysts within conductive pnictogenide matrix. gas‐phase reaction of Ru‐substituted Ni–Fe‐layered‐double‐hydroxide (Ni 2 Fe 1− x Ru ‐LDH) with pnictogenation reagents leads the phase transformation into pnictogenide. variation reactivity allows for control over size exsolved (i.e., nanoclusters nitridation single atoms phosphidation), underscoring effectiveness pnictogenation‐driven strategy stabilizing Ru‐exsolved nickel–iron nitride/phosphide demonstrates outstanding electrocatalyst activity hydrogen evolution reaction, exhibiting smaller overpotential higher stability than Ru‐deposited homologs. pnictogenation‐assisted optimizing performance ascribed interfacial electronic interaction between metals ions assisted by inner sphere mechanism. In situ spectroscopic analyses highlight that facilitate more electron transfer reactants nanoclusters, which primarily responsible superior impact phosphidation‐driven approach.

Language: Английский

Citations

0
Growing Nanocrystalline Ru on Amorphous/Crystalline Heterostructure for Efficient and Durable Hydrogen Evolution Reaction DOI Open Access

Qikai Huang,

Xu Zhang, Tong Li

et al.

Catalysts, Journal Year: 2025, Volume and Issue: 15(5), P. 434 - 434

Published: April 29, 2025

The design of efficient hydrogen evolution reaction (HER) catalysts to minimize overpotentials plays a pivotal role in advancing water electrolysis and clean energy solutions. Ru-based catalysts, regarded as potential replacements for Pt-based face stability challenges during catalytic process. precise regulation metal–support interactions effectively prevents Ru nanoparticle degradation while optimizing interfacial electronic properties, enabling the simultaneous enhancement activity stability. Herein, we an amorphous/crystalline support employ situ replacement develop Ru-NiPx-Ni structure. crystalline Ni phase with ordered atomic arrangement ensures charge transport, amorphous unsaturated dangling bonds provides abundant anchoring sites nanoclusters. This synergistic structure significantly enhances HER performance, which attains 19 mV at 10 mA cm−2 70 100 1 m KOH, sustained operation exceeding 55 h cm−2. Electrochemical impedance spectroscopy analysis confirms that not only has high density active centers HER, but also reduces transfer resistance electrode–electrolyte interface, kinetics. study presents new directions designing high-efficiency catalysts.

Language: Английский

Citations

0
Recent Progress of Ni-based Nanomaterials as Promoter for Enhancing the Hydrogen Evolution Reaction Performance of Noble Metal Catalysts DOI
Le Li,

Tao Chen,

Linyan Zhang

et al.

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 998, P. 174896 - 174896

Published: May 19, 2024

Language: Английский

Citations

3
Self-supporting Ru3+ doped copper phosphate with Pt/C-like hydrogen evolution reaction activity DOI

Meiting Wang,

Juan Jian, Zhuo Wang

et al.

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

The in situ achieved Ru 3+ –Cu 3 (PO 4 ) 2 displays enhanced electrocatalytic properties compared to pure Cu and shows Pt/C-like hydrogen evolution reaction activity.

Language: Английский

Citations

3