Interfacial chemical bond and internal electric field modulated Z-scheme Sv-ZnIn2S4/MoSe2 photocatalyst for efficient hydrogen evolution

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: July 5, 2021

Construction of Z-scheme heterostructure is great significance for realizing efficient photocatalytic water splitting. However, the conscious modulation charge transfer still a challenge. Herein, interfacial Mo-S bond and internal electric field modulated composed by sulfur vacancies-rich ZnIn2S4 MoSe2 was rationally fabricated hydrogen evolution. Systematic investigations reveal that induce mechanism as confirmed surface photovoltage spectra, DMPO spin-trapping electron paramagnetic resonance spectra density functional theory calculations. Under intense synergy among bond, S-vacancies, optimized photocatalyst exhibits high evolution rate 63.21 mmol∙g-1·h-1 with an apparent quantum yield 76.48% at 420 nm monochromatic light, which about 18.8-fold pristine ZIS. This work affords useful inspiration on consciously modulating atomic-level interface control to signally promote performance.

Language: Английский

---

Doping regulation in transition metal compounds for electrocatalysis

Chemical Society Reviews, Journal Year: 2021, Volume and Issue: 50(17), P. 9817 - 9844

Published: Jan. 1, 2021

This review summarizes the recent progress related to field of doping regulation in transition metal compounds, aiming give an overview this strategy for designing high-performance catalysts towards electrocatalytic applications.

Language: Английский

---

Ni2P/NiMoP heterostructure as a bifunctional electrocatalyst for energy-saving hydrogen production

eScience, Journal Year: 2021, Volume and Issue: 1(1), P. 69 - 74

Published: Sept. 21, 2021

Electrochemical water splitting is a sustainable and feasible strategy for hydrogen production but hampered by the sluggish anodic oxygen evolution reaction (OER). Herein, an effective approach introduced to significantly decrease cell voltage replacing OER with urea oxidation (UOR). A Ni2P/NiMoP nanosheet catalyst hierarchical architecture uniformly grown on nickel foam (NF) substrate through simple hydrothermal phosphorization method. The achieves impressive HER activity, low overpotential of only 22 mV at 10 mA cm–2 Tafel slope 34.5 dec–1. In addition, reduced from 1.49 V 1.33 after introduction 0.33 M urea. Notably, two-electrode electrolyzer employing as bifunctional exhibits current density 1.35 excellent long-term durability 80 h.

Language: Английский

---

Nanostructured metal phosphides: from controllable synthesis to sustainable catalysis

Chemical Society Reviews, Journal Year: 2021, Volume and Issue: 50(13), P. 7539 - 7586

Published: Jan. 1, 2021

Metal phosphides (MPs) with unique and desirable physicochemical properties provide promising potential in implementable sustainable catalytic fields including electrocatalysis, photocatalysis, mild thermocatalysis, interdisciplinary hybrid systems.

Language: Английский

---

Electronic Modulation Caused by Interfacial Ni‐O‐M (M=Ru, Ir, Pd) Bonding for Accelerating Hydrogen Evolution Kinetics

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(41), P. 22276 - 22282

Published: Aug. 24, 2021

Abstract Designing definite metal‐support interfacial bond is an effective strategy for optimizing the intrinsic activity of noble metals, but rather challenging. Herein, a series quantum‐sized metal nanoparticles (NPs) anchored on nickel metal–organic framework nanohybrids (M@Ni‐MOF, M=Ru, Ir, Pd) are rationally developed through spontaneous redox strategy. The metal‐oxygen bonds between NPs and Ni‐MOF guarantee structural stability sufficient exposure surface active sites. More importantly, such precise feature can effectively modulate electronic structure hybrids charge transfer formed Ni‐O‐M bridge then improves reaction kinetics. As result, representative Ru@Ni‐MOF exhibits excellent hydrogen evolution (HER) at all pH values, even superior to commercial Pt/C recent noble‐metal catalysts. Theoretical calculations deepen mechanism understanding HER performance optimized adsorption free energies water due interfacial‐bond‐induced electron redistribution.

Language: Английский

---

Interfacial Engineering of Ni₃N/Mo₂N Heterojunctions for Urea-Assisted Hydrogen Evolution Reaction

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(7), P. 4091 - 4100

Published: March 9, 2023

The urea oxidation reaction (UOR) is considered as an alternative to the oxygen evolution for high-efficiency hydrogen production. However, molecule relatively complex, containing both electron-donating amino (−NH2) and electron-withdrawing carbonyl (C═O) groups, understanding influence of different functional groups on adsorption behavior conducive rational design preparation high-performance UOR catalysts. Herein, we report a simple synthesis Ni3N/Mo2N heterostructure systematic investigation urea-assisted electrolytic Both temperature-programmed desorption theoretical calculations decipher that −NH2 C═O are more easily adsorbed Ni3N Mo2N, respectively. Meanwhile, could combine enhance advantages individual components, optimizing urea. Besides, this also beneficial improving performance. As expected, in two-electrode water electrolyzer utilizing bifunctional catalysts, production can readily occur at evidently lower voltage (1.36 V@10 mA cm–2), which much than traditional electrolysis, well 7 times higher rate achieved.

Language: Английский

---

In Situ Grown Co‐Based Interstitial Compounds: Non‐3d Metal and Non‐Metal Dual Modulation Boosts Alkaline and Acidic Hydrogen Electrocatalysis

Small, Journal Year: 2021, Volume and Issue: 18(9)

Published: Dec. 16, 2021

Interfacial engineering and elemental doping are the two parameters to enhance catalytic behavior of cobalt nitrides for alkaline hydrogen evolution reaction (HER). However, simultaneously combining these improve HER properties in media is rarely reported also remains challenging acidic media. Herein, it demonstrated that high-valence non-3d metal non-metal integration can achieve Co-based nitride/oxide interstitial compound phase boundaries on stainless steel mesh (denoted Mo-Co5.47 N/N-CoO) efficient Density functional theory (DFT) calculations show unique structure does not only realize multi-active sites, enhanced water dissociation kinetics, low adsorption free energy media, but enhances positive charge density ions (H+ ) effectively allow H+ receive electrons from catalysts surface toward promoting As a result, as-prepared N/N-CoO demands overpotential -28 mV@10 mA cm-2 an medium, superior commercial Pt/C at current > 44 medium. This work paves useful strategy design cobalt-based electrocatalysts beyond.

Language: Английский

---

3D Co₃O₄‐RuO₂ Hollow Spheres with Abundant Interfaces as Advanced Trifunctional Electrocatalyst for Water‐Splitting and Flexible Zn–Air Battery

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(38)

Published: July 12, 2022

Abstract Exploiting efficient and stable electrocatalysts with trifunctional catalytic activity toward hydrogen evolution reaction (HER), oxygen (OER), reduction (ORR) act has a crucial role sustainable energy development. Therefore, this study fabricates Co 3 O 4 ‐RuO 2 hollow spheres using facile eco‐friendly solvothermal low temperature oxidation procedure followed by ice water treatment (IW‐Co ‐HS). The specific nanostructure could provide sufficient active sites channels in the electrocatalytic procedure. Then, IW‐Co ‐HS presents small overpotentials HER (40 mV@ 10 mA cm −2 ) OER (250 ), high half‐wave potential for ORR (E 1/2 @ 0.79 V). Remarkably, also superior performances water‐splitting flexible rechargeable Zn–air batteries. Furthermore, electrolysis can be driven energy, including solar, wind, thermal assembled battery. This provides valid path to synthesize multifunctional on energy‐related devices.

Language: Английский

---

Facile synthesis of MoP-Ru2P on porous N, P co-doped carbon for efficiently electrocatalytic hydrogen evolution reaction in full pH range

Applied Catalysis B Environment and Energy, Journal Year: 2021, Volume and Issue: 303, P. 120879 - 120879

Published: Nov. 3, 2021

Language: Английский

---

Fine-tune the electronic structure in Co-Mo based catalysts to give easily coupled HER and OER catalysts for effective water splitting

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 328, P. 122474 - 122474

Published: Feb. 15, 2023

Language: Английский

---