Exploration of metal‐free 2D electrocatalysts toward the oxygen electroreduction DOI Creative Commons
Joyjit Kundu, Taehyun Kwon, Kwangyeol Lee

et al.

Exploration, Journal Year: 2024, Volume and Issue: 4(4)

Published: Jan. 17, 2024

Abstract The advancement of economical and readily available electrocatalysts for the oxygen reduction reaction (ORR) holds paramount importance in fuel cells metal‐air batteries. Recently, 2D non‐metallic materials have obtained substantial attention as viable alternatives ORR catalysts due to their manifold advantages, encompassing low cost, ample availability, surface‐to‐volume ratio, high conductivity, exceptional durability, competitive activity. augmented performances observed metal‐free typically arise from heteroatom doping, defects, or formation heterostructures. Here, authors delve into realm ORR, pivoting around materials. Initially, merits are explored mechanism is dissected. Subsequently, a comprehensive survey diverse presented, tracing evolutionary journey fundamental concepts pragmatic applications context ORR. Substantial given on exploration various strategies enhancing assessing impact inherent material performance, including electronic properties. Finally, challenges future prospects that lie ahead underscored, they aspire serve efficient electrocatalysts.

Language: Английский

Designing single-atom catalysts toward improved alkaline hydrogen evolution reaction DOI Creative Commons
Fatma Abdelghafar, Xiaomin Xu, San Ping Jiang

et al.

Materials Reports Energy, Journal Year: 2022, Volume and Issue: 2(3), P. 100144 - 100144

Published: July 31, 2022

Electrochemical water splitting powered by renewables-generated electricity represents a promising approach for green hydrogen production. However, the sluggish kinetics evolution reaction (HER) under an alkaline medium causes massive amount of energy losses, hindering large-scale Exploring efficient and low-cost catalyst candidates H2 generation becomes crucial demand. Single-atom catalysts (SACs) demonstrate great promise enabling HER catalysis at maximum atom utilization efficiency. In this review, we provide comprehensive overview recent progress in SACs application environments. The fundamentals are first introduced, followed justification need to develop SACs. rational design including inherent element property, coordination environment, SAC morphology, mass loading highlighted. To facilitate development HER, further propose remaining challenges perspectives research field.

Language: Английский

Citations

121
Element‐Doped Mxenes: Mechanism, Synthesis, and Applications DOI
Ronghao Wang, Muhan Li, Kaiwen Sun

et al.

Small, Journal Year: 2022, Volume and Issue: 18(25)

Published: May 9, 2022

Heteroatom doping can endow MXenes with various new or improved electromagnetic, physicochemical, optical, and structural properties. This greatly extends the arsenal of materials their potential for a spectrum applications. article comprehensively critically discusses syntheses, properties, emerging applications growing family heteroatom-doped materials. First, strategies, synthesis methods, theoretical simulations high-performance are summarized. In order to achieve materials, mechanism atomic element from three aspects lattice optimization, functional substitution, interface modification is analyzed summarized, aiming provide clues developing controllable synthetic routes. The mechanisms underlying advantageous uses energy storage, catalysis, sensors, environmental purification biomedicine highlighted. Finally, future opportunities challenges study application multifunctional presented. work could open up prospects development MXenes.

Language: Английский

Citations

96
Interfacial electronic structure modulation of CoP nanowires with FeP nanosheets for enhanced hydrogen evolution under alkaline water/seawater electrolytes DOI
Chaojie Lyu, Jiarun Cheng, Kaili Wu

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 317, P. 121799 - 121799

Published: July 27, 2022

Language: Английский

Citations

82
Two-dimensional mineral hydrogel-derived single atoms-anchored heterostructures for ultrastable hydrogen evolution DOI Creative Commons
Fucong Lyu, Shanshan Zeng, Zhe Jia

et al.

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Oct. 21, 2022

Hydrogen energy is critical for achieving carbon neutrality. Heterostructured materials with single metal-atom dispersion are desirable hydrogen production. However, it remains a great challenge to achieve large-scale fabrication of atom-anchored heterostructured catalysts high stability, low cost, and convenience. Here, we report iron (Fe) atom-dispersed Mo-based nanosheets developed from mineral hydrogel. These rationally designed exhibit excellent evolution reaction (HER) activity reliability in alkaline condition, manifesting an overpotential 38.5 mV at 10 mA cm-2, superior stability without performance deterioration over 600 h current density up 200 most previously reported non-noble-metal electrocatalysts. The experimental functional theory results reveal that the O-coordinated Fe heterostructures greatly facilitated H2O adsorption enabled effective adsorbed (H*) adsorption/desorption. green, scalable production single-atom-dispersed HER electrocatalysts here significance promoting their implementation.

Language: Английский

Citations

78
Development of SnCo2O4 spinel supported on the rGO nanosheet with the improved electrochemical performance of OER activity DOI
Hossam Donya,

Salma Aman,

Naseeb Ahmad

et al.

International Journal of Hydrogen Energy, Journal Year: 2023, Volume and Issue: 51, P. 436 - 447

Published: July 11, 2023

Language: Английский

Citations

76
Facile fabrication of SnSe nanorods embedded in GO nanosheet for robust oxygen evolution reaction DOI Creative Commons
Sumaira Manzoor, Norah Salem Alsaiari, Khadijah Mohammedsaleh Katubi

et al.

Journal of Taibah University for Science, Journal Year: 2023, Volume and Issue: 17(1)

Published: Feb. 20, 2023

Excessive use of fossil fuels has caused their rapid depletion, resulting in a growing energy crisis as well many environmental concerns, and prompting the development sustainable conversion system. In this study, we report GO based SnSe nanomaterial incorporated via hydrothermal route engaging OER activity. The morphological, structural textual effects material have been measured with scanning electron microscopy (SEM), X-ray diffraction (XRD) Brunauer Emmett Teller (BET). Furthermore, kinetic process, active sites, conductivity stability electrode medium GO, GO/SnSe were estimated electrochemical impedance spectroscopy (EIS), linear sweep voltammetry (LSV), surface area (ECSA) chronoamperometry under 1.0 M KOH Ni foam conductive substrate. Its results depicted following: nanocomposite displayed lesser overpotential around 336 mV to reach current density 10 mA cm−2 Tafel slope 36 dec−1. Cyclic analysis show over 35 h. exceptional properties differentiate it good for electrical other fields future.

Language: Английский

Citations

67
Competitive Trapping of Single Atoms onto a Metal Carbide Surface DOI

Jican Hao,

Han Zhu, Zechao Zhuang

et al.

ACS Nano, Journal Year: 2023, Volume and Issue: 17(7), P. 6955 - 6965

Published: March 27, 2023

Controlling atomic adjustment of single-atom catalysts (SACs) can directly change its local configuration, regulate the energy barrier intermediates, and further optimize reaction pathways. Herein, we report an atom manipulating process to synthesize Ni atoms stabilized on vanadium carbide (NiSA-VC) through a nanofiber-medium thermodynamically driven migration strategy. Experimental theoretical results systematically reveal tunable pathway from nanoparticles neighboring N-doped carbon (NC) finally metal that was obtained by regulating competitive adsorption energies between VC NC for capturing atoms. For CO2-to-CO electroreduction, NiSA-VC exhibits industrial current density -180 mA cm-2 at -1.0 V vs reversible hydrogen electrode highest Faradaic efficiency CO production (FECO) 96.8% -0.4 RHE in flow cell. Significant electron transfers occurring structures contribute activation CO2, facilitate free energy, *CO desorption as rate-determining step, promote activity selectivity. This study provides understanding how design powerful SACs electrocatalysis.

Language: Английский

Citations

61
State-of-the-art single-atom catalysts in electrocatalysis: From fundamentals to applications DOI
Muhammad Humayun, Muhammad Israr, Abbas Khan

et al.

Nano Energy, Journal Year: 2023, Volume and Issue: 113, P. 108570 - 108570

Published: May 29, 2023

Language: Английский

Citations

59
Microwave‐Assisted Rapid Synthesis of MOF‐Based Single‐Atom Ni Catalyst for CO2 Electroreduction at Ampere‐Level Current DOI
Ming Wen, Nana Sun, Long Jiao

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(10)

Published: Jan. 17, 2024

Carbon-based single-atom catalysts (SACs) have attracted tremendous interest in heterogeneous catalysis. However, the common electric heating techniques to produce carbon-based SACs usually suffer from prolonged time and tedious operations. Herein, a general facile microwave-assisted rapid pyrolysis method is developed afford within 3 min without inert gas protection. The obtained present high porosity comparable carbonization degree those by techniques. Specifically, Ni implanted N-doped carbon (Ni

Language: Английский

Citations

50
Collective Effect in a Multicomponent Ensemble Combining Single Atoms and Nanoparticles for Efficient and Durable Oxygen Reduction DOI

Xiaochun Xu,

Xinyi Li, Wenting Lu

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(15)

Published: Feb. 13, 2024

Abstract Metal single‐atom catalysts represent one of the most promising non‐noble metal for oxygen reduction reaction (ORR). However, they still suffer from insufficient activity and, particularly, durability practical applications. Leveraging density functional theory (DFT) and machine learning (ML), we unravel an unexpected collective effect between FeN 4 OH sites, CeN motifs, Fe nanoparticles (NPs), Fe−CeO 2 NPs. The comprises differently‐weighted electronic geometric interactions, whitch results in significantly enhanced ORR active sites with a half‐wave potential ( E 1/2 ) 0.948 V versus reversible hydrogen electrode (V RHE alkaline, relative to commercial Pt/C , 0.851 ). Meanwhile, this endows shortened Fe−N bonds remarkable negligible loss after 50,000 cycles. ML was used understand intricate interactions reveal intrinsic descriptors account performance. universality demonstrated effective Co, Ni, Cu, Cr, Mn‐based multicomponent ensembles. These confirm importance simultaneously improve catalytic durability.

Language: Английский

Citations

42