High‐Valence Oxides for High Performance Oxygen Evolution Electrocatalysis

Advanced Science, Journal Year: 2023, Volume and Issue: 10(22)

Published: May 30, 2023

Valence tuning of transition metal oxides is an effective approach to design high-performance catalysts, particularly for the oxygen evolution reaction (OER) that underpins solar/electric water splitting and metal-air batteries. Recently, high-valence (HVOs) are reported show superior OER performance, in association with fundamental dynamics charge transfer intermediates. Particularly considered adsorbate mechanism (AEM) lattice oxygen-mediated (LOM). High-valence states enhance performance mainly by optimizing e

Language: Английский

---

Modulating the electronic structure of Ni(OH)₂ by coupling with low-content Pt for boosting the urea oxidation reaction enables significantly promoted energy-saving hydrogen production

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(5), P. 1984 - 1996

Published: Jan. 1, 2024

A urea-assisted water splitting electrolyzer based on Pt nanoparticle-anchored Ni(OH) 2 @Ni-CNF catalyst and Pt@Ni-CNF is constructed for effectively reducing the energy consumption of H production.

Language: Английский

---

Delaminated MBene sheets beyond usual 2D transition metal materials for securing Pt single atoms to boost hydrogen evolution

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(9), P. 4093 - 4104

Published: Jan. 1, 2023

The use of a minimum amount active metal makes single-atom catalysts (SACs) an effective route to economically catalyze electrochemical reactions.

Language: Английский

---

Ruthenium Single Atomic Sites Surrounding the Support Pit with Exceptional Photocatalytic Activity

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(21)

Published: April 1, 2024

Abstract Single‐metal atomic sites and vacancies can accelerate the transfer of photogenerated electrons enhance photocatalytic performance in photocatalysis. In this study, a series nickel hydroxide nanoboards (Ni(OH) x NBs) with different loadings single‐atomic Ru ( w ‐SA‐Ru/Ni(OH) ) were synthesized via photoreduction strategy. such catalysts, are anchored to surrounding pits. Notably, SA‐Ru/Ni(OH) 0.60 wt % loading (0.60‐SA‐Ru/Ni(OH) exhibits highest catalytic (27.6 mmol g −1 h during reduction CO 2 (CO RR). Either superfluous (0.64 %, 18.9 ; 3.35 9.4 or scarce (0.06 15.8 0.29 21.95 0.58 23.4 have negative effect on its properties. Density functional theory (DFT) calculations combined experimental results revealed that be adsorbed pits; help conversion as‐adsorbed lower energy *COOH formation accelerating reaction; excessive occupy retard completion RR.

Language: Английский

---

N, P co-doped graphene-supported monometallic nanoparticles for highly efficient hydrogen evolution by acid electrolysis of water

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(17), P. 10300 - 10306

Published: Jan. 1, 2024

Pt/rGNP exhibits much higher catalytic properties than other transition metal/rGNP catalysts for hydrogen evolution; its overpotential at 100 mA cm −2 in 0.5 M H 2 SO 4 is only 10.6 mV, and Tafel slope 14.53 mV dec −1 .

Language: Английский

---

Construction of Pt Single-Atom and Cluster/FeOOH Synergistic Active Sites for Efficient Electrocatalytic Hydrogen Evolution Reaction

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(10), P. 7867 - 7876

Published: May 6, 2024

The design of efficient catalysts that synergistically promote *H2O decomposition, H2 formation, and desorption is critical to accelerate hydrogen evolution reaction (HER) kinetics but remains a significant challenge. Herein, we an catalyst Pt/FeOOH@NiFe LDHs with Pt single-atom cluster distribution induced by amorphous FeOOH. low content 2 wt % exhibit ultralow HER overpotentials 20 85 mV in alkaline media (5 40 acidic media) achieve the current densities 10 100 mA cm–2. specific activity normalized electrochemically active surfaces (ECSA) are [email protected] cmECSA–2 140 [email protected] cmECSA–2. Tafel slope 51 dec–1, process follows Volmer-Hyrovsky mechanism. Moreover, overall water splitting requires only voltages 1.46 V@10 cm–2 1.61 V@100 cm–2, which better than most reported catalysts. Experimental theoretical studies show FeOOH can induce formation electron redistribution, formed cluster/FeOOH synergistic sites superior performance. facilitates adsorption activation H2O, play key role H2, accelerating kinetics.

Language: Английский

---

Enhancing Ni/Co Activity by Neighboring Pt Atoms in NiCoP/MXene Electrocatalyst for Alkaline Hydrogen Evolution

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(20)

Published: Feb. 27, 2024

Density functional theory (DFT) calculations demonstrate neighboring Pt atoms can enhance the metal activity of NiCoP for hydrogen evolution reaction (HER). However, it remains a great challenge to link and NiCoP. Herein, we introduced curvature bowl-like structure construct Pt/NiCoP interface by adding minimal 1 ‰-molar-ratio Pt. The as-prepared sample only requires an overpotential 26.5 181.6 mV accordingly achieve current density 10 500 mA cm

Language: Английский

---

Challenges and Opportunities for Single‐Atom Electrocatalysts: From Lab‐Scale Research to Potential Industry‐Level Applications

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

Published: June 13, 2024

Single-atom electrocatalysts (SACs) are a class of promising materials for driving electrochemical energy conversion reactions due to their intrinsic advantages, including maximum metal utilization, well-defined active structures, and strong interface effects. However, SACs have not reached full commercialization broad industrial applications. This review summarizes recent research achievements in the design crucial electrocatalytic on sites, coordination, substrates, as well synthesis methods. The key challenges facing activity, selectivity, stability, scalability, highlighted. Furthermore, it is pointed out new strategies address these increasing activity enhancing utilization improving optimizing local environment, developing fabrication techniques, leveraging insights from theoretical studies, expanding potential Finally, views offered future direction single-atom electrocatalysis toward commercialization.

Language: Английский

---

Fabricating highly active Pt atomically dispersed catalysts with the co-existence of Pt-O1Ni1 single atoms and Pt sub-nanoclusters for improved hydrogen evolution

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 354, P. 124074 - 124074

Published: April 24, 2024

Language: Английский

---

Recent Advances and Perspectives on Coupled Water Electrolysis for Energy‐Saving Hydrogen Production

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

Abstract Overall water splitting (OWS) to produce hydrogen has attracted large attention in recent years due its ecological‐friendliness and sustainability. However, the efficiency of OWS been forced by sluggish kinetics four‐electron oxygen evolution reaction (OER). The replacement OER alternative electrooxidation small molecules with more thermodynamically favorable potentials may fundamentally break limitation achieve production low energy consumption, which also be accompanied value‐added chemicals than or electrochemical degradation pollutants. This review critically assesses latest discoveries coupled various OWS, including alcohols, aldehydes, amides, urea, hydrazine, etc. Emphasis is placed on corresponding electrocatalyst design related mechanisms (e.g., dual hydrogenation N–N bond breaking hydrazine C═N regulation urea inhibit hazardous NCO − NO productions, etc.), along emerging reactions (electrooxidation tetrazoles, furazans, iodide, quinolines, ascorbic acid, sterol, trimethylamine, etc.). Some new decoupled electrolysis self‐powered systems are discussed detail. Finally, potential challenges prospects highlighted aid future research directions.

Language: Английский

---