The Role of Phosphorus on Alkaline Hydrogen Oxidation Electrocatalysis for Ruthenium Phosphides DOI
Yiming Jin,

Xinran Fan,

Wenjing Cheng

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(41)

Published: July 15, 2024

Abstract Transition metal/p‐block compounds are regarded as the most essential materials for electrochemical energy converting systems involving various electrocatalysis. Understanding role of p‐block element on interaction key intermediates and interfacial water molecule orientation at polarized catalyst‐electrolyte interface during electrocatalysis is important rational designing advanced modified metal electrocatalysts. Herein, taking a sequence ruthenium phosphides (including Ru 2 P, RuP ) model catalysts, we establish volcanic‐relation between P‐proportion alkaline hydrogen oxidation reaction (HOR) activity. The dominant P regulating hydroxyl binding validated by active sites poisoning experiments, pH‐dependent infection‐point behavior, in situ surface enhanced infrared absorption spectroscopy, density functional theory calculations, which could tailor d‐band structure Ru, optimize adsorption across Ru−P moieties, thereby leading to improved proportion strongly hydrogen‐bonded facilitated proton‐coupled electron transfer process, responsible HOR performance.

Language: Английский

Water flipping and the oxygen evolution reaction on Fe2O3 nanolayers DOI Creative Commons
Raiden Speelman,

Ezra J. Marker,

Mavis D. Boamah

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: April 15, 2025

Hematite photoanodes are promising for the oxygen evolution reaction, however, their high overpotential (0.5-0.6 V) water oxidation and limited photocurrent make them economically unviable at present. The work needed to orient dipoles an electrode surface may be overlooked contribution overpotential, especially regarding of water, electron source in reaction (OER). Here, we employ second harmonic amplitude phase measurements quantify number net-aligned Stern layer molecules associated with flipping, on hematite, earth abundant OER semiconductor a overpotential. At zero applied bias, pH-dependent potentials molecule flipping exhibit Nernstian behavior. positive pH 13, approximately one two monolayers points atoms towards electrode, favorable OER. matches cohesive energy liquid (44 kJ mol-1) current density is highest. This negligible 5, where approaches 100 mol-1. Our findings suggest causal relationship between need which lead developing strategies decreasing latter.

Language: Английский

Citations

0
Effects of Electrolyte Cations on the Oxygen Evolution Reaction DOI
Boqiang Chen, Dunwei Wang, Matthias M. Waegele

et al.

Current Opinion in Electrochemistry, Journal Year: 2025, Volume and Issue: unknown, P. 101697 - 101697

Published: April 1, 2025

Language: Английский

Citations

0
Operando methods for the elucidation of electrolyte effects in electrocatalysis DOI Creative Commons
Kees E. Kolmeijer, Rik V. Mom

Current Opinion in Electrochemistry, Journal Year: 2025, Volume and Issue: unknown, P. 101700 - 101700

Published: April 1, 2025

Language: Английский

Citations

0
Interfacial water regulation for water-participating electrocatalytic hydrogenation reactions DOI
Yanmei Huang, Ying Gao, Bin Zhang

et al.

Chem, Journal Year: 2025, Volume and Issue: unknown, P. 102533 - 102533

Published: April 1, 2025

Language: Английский

Citations

0
Uncovering the catalyst/electrolyte interfacial process by frequency dispersion of capacitance DOI Creative Commons
Jinzhen Huang,

Erica D. Clinton,

Kenneth Crossley

et al.

Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

Citations

0
The Role of Water and Cations in Shaping Electrified Interfaces: Insights from Raman and FTIR Spectroscopy DOI
Jéssica Alves Nogueira, Lucas D. Germano, Leonardo D. De Angelis

et al.

Current Opinion in Electrochemistry, Journal Year: 2025, Volume and Issue: unknown, P. 101701 - 101701

Published: April 1, 2025

Language: Английский

Citations

0
Electric Field’s Dueling Effects through Dehydration and Ion Separation in Driving NaCl Nucleation at Charged Nanoconfined Interfaces DOI
Ruiyu Wang, Pratyush Tiwary

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: May 9, 2025

Investigating nucleation in charged nanoconfined environments under electric fields is crucial for many scientific and engineering applications. Here we study the of NaCl from aqueous solution near surfaces using machine-learning-augmented enhanced sampling molecular dynamics simulations. Our simulations successfully drive phase transitions between liquid solid phases NaCl. The stabilized fields, particularly at an intermediate surface charge density. We examine which physical characteristics solutions find that removal solvent water Cl- precursor plays a more critical role than accumulation ions. reveal competing effects on processes: they facilitate water, promoting nucleation, but also promote separation ion pairs, thereby hindering nucleation. This work provides framework studying processes insights design electrochemistry materials.

Language: Английский

Citations

0
Structure and Dissociation of Water at the Electrode–Solution Interface Studied by In Situ Vibrational Spectroscopic Techniques DOI

Shanshan Li,

R. S. Shi,

Jiaru Song

et al.

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

Published: May 13, 2025

In aqueous electrochemistry, water in contact with charged surfaces is ubiquitous and indispensable, dictating the binding of solutes to electrode as well transport process protons electrons interfacial region. A comprehensive understanding structure dissociation at molecular level extremely important yet challenging, given its critical role various physical, chemical, biological processes. situ vibrational spectroscopic techniques serve a powerful tool for acquiring probing reaction mechanisms real time. this review, we briefly summarize latest advances electric double layer model experimental methods employed electrode-solution interface. Particular emphasis placed on that have unveiled new insights into across diverse under ambient conditions. And then, it also provides an overview recent progress subtle relationship between activity, aiming provide novel fields energy catalysis.

Language: Английский

Citations

0
Edge‐Rich Graphene Nanomesh Thermally Self‐Exfoliated From Metal‐Organic Frameworks for Boosting CO2 Electroreduction DOI

Mingxu Liu,

Yunhui Xie, Fulai Liu

et al.

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

Published: May 15, 2025

Abstract Atomic‐level metal sites at the edges of graphene‐like carbon supports are considered more active for CO 2 electrocatalysis than those in‐plane. However, creating high‐density edge‐dominating sites, particularly in a simple, scalable, and self‐templated fashion, presents significant challenge. Herein, MOF‐mediated self‐exfoliation strategy is reported to preferentially integrate edge‐type FeN 4 onto ultrathin edge‐rich N‐doped graphene nanomesh (e‐Fe‐NGM). Theoretical calculations, finite element method (FEM) simulations, together with series situ spectro‐electrochemical experiments corroborate that can not only optimize electronic structure catalysts, facilitating formation * COOH desorption CO, but also effectively induce strong local electrostatic field, promoting interfacial H O supply thereby accelerating protonation process . Thus‐prepared e‐Fe‐NGM delivers remarkable Faraday efficiency (FE) above 98% over an ultra‐wide potential window 500 mV high turnover frequency 6648 h −1 , much superior controlled sample dominant plane‐type sites. Moreover, this self‐exfoliated, non‐catalyzed approach readily scalable be used produce large‐size industrial levels.

Language: Английский

Citations

0
Competitive Optimization of Interfacial Water Dissociation and Hydroxyl Reductive Desorption of MoCoNi‐Based Catalysts for Superior Alkaline Hydrogen Evolution DOI

C.R. Yang,

Serhii Makovetskyi,

Yanqing Yang

et al.

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

Published: May 19, 2025

Abstract Nano‐heterointerface serves as a catalytic center for water dissociation promoted by the concerted interaction of *OH on oxide and *H nitride. Kinetic energetics hydroxyl (de)stabilization are vital to surface coverage reactive charge reductive desorption. electron paramagnetic resonance spectra DMPO‐H DMPO‐OH unravel radical nature water‐dissociated *OH. coherent synergism interfacial ensemble electronic effects realizes TOF/η−ɛ d volcano net result work‐function‐directed competition between (covalent control) desorption (ionic kinetics, manifesting that alkaline HER shaped d‐band descriptor originates from intricate balance guided work function descriptor. Orchestrated with alkali metal cations fine‐tuning covalent/ionic catalyst water‐derived intermediates, microrod‐array N–MoCoNiAl/NF electrode (NF═Ni foam) drives 10 mA cm −2 at overpotential mV in 1 m KOH. The proposed pathway may provide insight into how peculiar structure multi‐site heterojunction hard‐soft covalent/electrostatic interactions impact molecular‐level mechanism efficient Volmer kinetics.

Language: Английский

Citations

0