Fuel, Journal Year: 2023, Volume and Issue: 354, P. 129410 - 129410
Published: Aug. 7, 2023
Language: Английский
Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(21)
Published: Feb. 2, 2024
Abstract Metal–support interaction (MSI) is witnessed as an essential manner to stabilize active metals and tune catalytic activity for heterogonous water splitting. Kinetically driving the electrolysis (WE) appeals a rational MSI system with coupled electron‐donating/accepting (e‐D/A) characters hydrogen/oxygen evolution reactions (HER/OER). However, metal stabilization effect by will in turn restrict deblocking of e‐D/A properties challenge full electrocatalytic optimization. This study profiles heterostructure featuring metastable Ru clusters on defective NiFe hydroxide (Ru/d‐NiFe LDH) support low‐precious (≈2 wt%) platform efficient WE. It indicated that interfacial oxygen vacancies can deviate stable 4d 5 orbit 2+δ state, regulate d‐band center levels toward facilitated HER/OER processes. Resultantly, Ru/d‐NiFe LDH attains ultralow overpotentials at 10 mA cm −2 Pt‐beyond alkaline HER (18 mV) OER (220 fast kinetics durability. The symmetrical electrolyzer delivers promising voltage 1.49 V 1 m KOH seawater splitting performance. work carries interesting opportunities rationalizing sophisticated metal‐support electrocatalysts through metal‐site metastabilization engineering.
Language: Английский
Citations
92
Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 650, P. 1500 - 1508
Published: July 19, 2023
Language: Английский
Citations
60
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(28)
Published: March 29, 2024
Abstract The effectuation of pH‐universal electrocatalysis is highly attractive but still challenging for the hydrogen evolution reaction (HER). It appeals not only facilitated electron transport also kinetical proton mass transfer. In this study, a via‐hole Ru/MoO 2 confined heterostructure profiled as metal‐support platform electron/mass transfer‐boosted HER studies. indicated that as‐formed Ru─O─Mo bridge can modulate electronic at interface, and adsorption transfer are kinetically derived by intensified metallic Ru─Ru bond. Resultantly, stably attains Pt‐beyond activity with an ultralow overpotential 9.2 mV 10 mA cm −2 in 1 m KOH, achieves competitive stability acidic/neutral electrolytes. Both experimental computational results reveal accelerated kinetics attributable to intensive through interfacial Ru→MoO spillover effect. This work opens up opportunities rationalize advanced electrocatalysts effect bond engineering.
Language: Английский
Citations
58
Journal of Energy Chemistry, Journal Year: 2023, Volume and Issue: 85, P. 430 - 438
Published: July 7, 2023
Language: Английский
Citations
55
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: June 10, 2024
Abstract The rationalization of pH‐robust catalysis is highly desired but challengeable for overall water electrolysis (WE). It requests a metal active site that can make an efficient adaption with both cathodic hydrogen and anodic oxygen evolution reactions (HER/OER). Herein, RuO 2‐x /RuSe 2 heterostructure electrocatalyst profiled interfacial Se─Ru─O bridge the splitting studies. An asymmetric bond delta‐polarization (Δp) found at bridge, including Δp > 0 Ru─O part < Ru─Se side by experiment calculation results. enlarged polarizability (Δp 0) in principle trigger lattice mediated (LOM) pathway OER; meanwhile, reduced benefit HER due to strengthened d‐p band hybridization. Resultantly, deliver ultralow overpotentials 25/10 mV Pt‐beyond 210/255 OER 10 mA cm −2 acidic/alkaline media, respectively. In especial, acidic WE be stably operated 200 h low cell voltage 1.478 V . This research clarifies polarization as criterion rational design catalysts.
Language: Английский
Citations
40
Chemical Communications, Journal Year: 2024, Volume and Issue: 60(23), P. 3129 - 3137
Published: Jan. 1, 2024
Designing low-dimensional nanomaterials is vital to address the energy and environmental crisis by means of electrocatalytic conversion reactions. Bimetallenes, as an emerging class 2D materials, present promise for By leveraging atomically thin layers, bimetallenes unsaturated surface coordination, high specific area conductivity, which are all indispensable features heterogeneous electrochemical However, intrinsic activity stability needs be improved further bimetallene electrocatalysts, due higher demands practical applications. Recently, many strategies have been developed optimize chemical or electronic structure accommodate transfer reactants, adsorption desorption intermediates, dissociation products. Considering that most such work focuses on adjusting structure, this review offers in-depth insight into recent representative optimizing mainly including alloying, strain effects, ligand defects heteroatom doping. Moreover, summarizing performance optimized using various strategies, we provide a understand structure-property relationships. In addition, future prospects challenges discussed development electrocatalysts.
Language: Английский
Citations
34
Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(1)
Published: Sept. 20, 2023
Abstract Amorphous metal‐organic frameworks (MOFs) with aperiodic atomic arrangements, featuring high intrinsic activity and rich active sites, have emerged as promising oxygen evolution reaction (OER) catalysts. However, the quantitative structure‐activity relationships (SARs) that determine OER activity, key to a rational catalyst design, remain unresolved. Inspired by controllable amorphization engineering, amorphous MOF structures are rationally constructed an ideal platform explore SAR in catalyzing OER. The mechanistic studies show could be volcano‐shape correlated either constant adsorption energy difference between OOH* O* (Δ G − Δ ) or position of d band center. (Ni 8 Co 2 ‐BDC), situated close volcano summit, possesses appropriate E level, which exhibits balanced intermediates adsorption/desorption ability consequently results boosted catalytic long‐term stability. This work supplies new perspectives investigate structures, thereby guiding design advanced
Language: Английский
Citations
30
Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(4), P. 2282 - 2288
Published: Jan. 17, 2024
A highly promising electrocatalyst has been designed and prepared for the hydrogen evolution reaction (HER). This involves incorporating well-dispersed Ir nanoparticles into a cobalt-based metal–organic framework known as Co-BPDC [Co(bpdc)(H2O)2, BPDC: 4,4′-biphenyldicarboxylic acid]. Ir@Co-BPDC demonstrates exceptional HER activity in alkaline media, surpassing both commercial Pt/C recent noble-metal catalysts. Theoretical results indicate that electron redistribution, induced by interfacial bonds, optimizes adsorption energy of water hydrogen, thereby enhancing our understanding superior properties HER.
Language: Английский
Citations
11
Small, Journal Year: 2023, Volume and Issue: 20(10)
Published: Oct. 24, 2023
Abstract Bimetallic metal‐organic framework (BMOF) exhibits better electrocatalytic performance than mono‐MOF, but deciphering the precise anchoring of foreign atoms and revealing underlying mechanisms at atomic level remains a major challenge. Herein, novel binuclear NiFe‐MOF with Fe sites is synthesized. The low‐crystallinity (LC)‐NiFe 0.33 ‐MOF exhibited abundant unsaturated active demonstrated excellent oxygen evolution reaction (OER) performance. It achieved an ultralow overpotential 230 mV 10 mA cm −2 Tafel slope 41 dec −1 . Using combination modulating crystallinity, X‐ray absorption spectroscopy, theoretical calculations, accurate metal sequence BMOF synergistic effect are identified, that adjacent site plays significant role in regulating catalytic endmost site. proposed model electrocatalysts facilitates investigation efficient OER related mechanisms.
Language: Английский
Citations
19
Small, Journal Year: 2023, Volume and Issue: 19(52)
Published: Aug. 27, 2023
Multifunctional electrocatalysts are crucial to cost-effective electrochemical energy conversion and storage systems requiring mutual enhancement of disparate reactions. Embedding noble metal nanoparticles in 2D metal-organic frameworks (MOFs) proposed as an effective strategy, however, the hybrids usually suffer from poor performance electrical conductivity operating conditions. Herein, ultrafine Pt strongly anchored on thiophenedicarboxylate acid based Fe-MOF nanobelt arrays (Pt@Fe-MOF) fabricated, allowing sufficient exposure active sites with superior trifunctional electrocatalytic activity for hydrogen evolution, oxygen reduction The interfacial Fe─O─Pt bonds can induce charge redistribution centers, leading optimization adsorption reaction intermediates, while dispersibility contributes high mass activity. When Pt@Fe-MOF is used bifunctional catalysts water-splitting, a low voltage 1.65 V required at 100 mA cm-2 long-term stability 20 h temperatures (65 °C) relevant industrial applications, outperforming commercial benchmarks. Furthermore, liquid Zn-air batteries cathodes deliver open-circuit voltages (1.397 V) decent cycling stability, which motivates fabrication flexible quasisolid-state rechargeable remarkable performance.
Language: Английский
Citations
17