Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 325, С. 122386 - 122386
Опубликована: Янв. 6, 2023
Язык: Английский
Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 325, С. 122386 - 122386
Опубликована: Янв. 6, 2023
Язык: Английский
Nature Communications, Год журнала: 2022, Номер 13(1)
Опубликована: Март 3, 2022
Abstract Developing high-performance electrocatalysts for hydrogen evolution reaction (HER) is crucial sustainable production, yet still challenging. Here, we report boron-modulated osmium (B-Os) aerogels with rich defects and ultra-fine diameter as a pH-universal HER electrocatalyst. The catalyst shows the small overpotentials of 12, 19, 33 mV at current density 10 mA cm −2 in acidic, alkaline, neutral electrolytes, respectively, well excellent stability, surpassing commercial Pt/C. Operando X-ray absorption spectroscopy that interventional interstitial B atoms can optimize electron structure B-Os stabilize Os active sites an electron-deficient state under realistic working conditions, simultaneously reveals catalytic mechanisms electrolytes. functional theory calculations also indicate introducing tailor electronic Os, resulting reduced water dissociation energy improved adsorption/desorption behavior hydrogen, which synergistically accelerate HER.
Язык: Английский
Процитировано
233ACS Catalysis, Год журнала: 2021, Номер 11(23), С. 14338 - 14351
Опубликована: Ноя. 12, 2021
The development of high-performance electrocatalysts is a highly efficient strategy to optimize the sluggish kinetic property oxygen evolution reaction (OER). Herein, we synthesize kind nickel foam (NF)-supported electrocatalyst composed one-dimensional Co3O4 nanowire as core and two-dimensional NiFe-LDH nanosheet shell (denoted NiFe-60/Co3O4@NF). Fluorine introduced into precursor Co(OH)F Co3O4, which results in improved thermal stability significantly increased regularly distributed vacancies, while electrochemically deposited nanosheets possess crystalline/amorphous hybrid structure. As result, hetero-interface mainly constituting Ni species from contributes interaction between Co Fe facilitates electron transfer. Simultaneously, vacancies coordinatively unsaturated amorphous area also determined, finally completing backtracking. Benefiting these factors, only low overpotentials 221 257 mV are required deliver current densities 100 500 mA cm–2, respectively, with quite small Tafel slope 34.6 dec–1 during OER for well-designed NiFe-60/Co3O4@NF electrocatalyst.
Язык: Английский
Процитировано
211Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 306, С. 121097 - 121097
Опубликована: Янв. 13, 2022
Язык: Английский
Процитировано
185Journal of the American Chemical Society, Год журнала: 2021, Номер 143(40), С. 16512 - 16518
Опубликована: Окт. 4, 2021
Heterojunction nanostructures usually exhibit enhanced properties in compariosn with their building blocks and are promising catalyst candidates due to combined surface unique interface. Here, for the first time we realized oriented growth of ultrasmall metal nanoparticles (NPs) on metal–organic framework nanosheets (MOF NSs) by precisely regulating reduction kinetics ions solvents. In particular, a rapid leads random distribution NPs MOF NSs, while slow results edge NSs. Impressively, strong synergy between Pt NSs significantly enhances hydrogen evolution reaction (HER) performance, optimal displays HER activities superior those composite commercial Pt/C under both acidic alkaline conditions. Moreover, versatility such has been extended other NPs, as Pd, Ag, Au. We believe this work will promote research interest material design many potential applications.
Язык: Английский
Процитировано
179Advanced Materials, Год журнала: 2023, Номер 35(12)
Опубликована: Янв. 4, 2023
Developing highly efficient multifunctional electrocatalysts is crucial for future sustainable energy pursuits, but remains a great challenge. Herein, facile synthetic strategy used to confine atomically thin Pd-PdO nanodomains amorphous Ru metallene oxide (RuO2 ). The as-synthesized electrocatalyst (Pd2 RuOx-0.5 h) exhibits excellent catalytic activity toward the pH-universal hydrogen evolution reaction (η10 = 14 mV in 1 m KOH, η10 12 0.5 H2 SO4 , and 22 PBS), alkaline oxygen 225 mV), overall water splitting (E10 1.49 V) with high mass operational stability. Further reduction endows material RuOx-2 promising activity, evidenced by halfway potential, four-electron selectivity, poison tolerance. enhanced attributed rational integration of favorable nanostructures, including 1) nanosheet morphology, 2) coexisting defective crystalline phases, 3) multi-component heterostructural features. These structural factors effectively regulate material's electronic configuration adsorption intermediates at active sites energetics.
Язык: Английский
Процитировано
174Advanced Materials, Год журнала: 2021, Номер 34(5)
Опубликована: Окт. 22, 2021
Next-generation batteries based on conversion reactions, including aqueous metal-air batteries, nonaqueous alkali metal-O2 and -CO2 metal-chalcogen metal-ion have attracted great interest. However, their use is restricted by inefficient reversible of active agents. Developing bifunctional catalysts to accelerate the reaction kinetics in both discharge charge processes urgently needed. Graphene-, or graphene-like carbon-supported atomically dispersed metal (G-ADMCs) been demonstrated show excellent activity various electrocatalytic making them promising candidates. Different from G-ADMCs for catalysis, which only require high one direction, rechargeable should provide discharging charging. This review provides guidance design fabrication next-generation reactions. The key challenges that prevent conversion, origin G-ADMCs, current principles highly analyzed highlighted each conversion-type battery. Finally, a summary outlook development G-ADMC materials with energy density efficiency are given.
Язык: Английский
Процитировано
171Advanced Functional Materials, Год журнала: 2022, Номер 32(32)
Опубликована: Май 22, 2022
Abstract Dual–single‐atom catalysts with synergistic effect of adjacent atomic metal sites show a great potential for oxygen reduction reaction (ORR). Herein, dynamical synthetic strategy is demonstrated the rational design dual‐atom catalyst ((Zn, Cu) − NC) non‐covalent Cu and Zn as nitrogen‐doped carbon support. Owing to interaction pair sites, (Zn, NC exhibits significant performances ORR, surpassing individual or site. The theoretical calculations reveal that can highly activate linear O 2 molecule via between pairs, providing more effective overlap 3d orbitals 2p orbital. Therefore, ORR activity optimized improvement adsorption configuration energy . Further, both liquid quasi‐solid zinc air batteries cathodes achieve remarkable density stability. This research proposes facile construct single‐atom presents an insightful understanding interplay heteronuclear atoms in catalysts.
Язык: Английский
Процитировано
154ACS Nano, Год журнала: 2022, Номер 16(11), С. 17847 - 17890
Опубликована: Окт. 31, 2022
Over the past few decades, development of electrocatalysts for energy applications has extensively transitioned from trial-and-error methodologies to more rational and directed designs at atomic levels via either nanogeometric optimization or modulating electronic properties active sites. Regarding modulation properties, nonprecious transition metal-based materials have been attracting large interest due capability versatile tuning d-electron configurations expressed through flexible orbital occupancy various possible degrees spin polarization. Herein, recent advances in tailoring transition-metal atoms intrinsically enhanced electrocatalytic performances are reviewed. We start with discussions on how polarization can govern essential level processes, including transport electron charge bulk, reactive species adsorption catalytic surface, transfer between centers adsorbed as well reaction mechanisms. Subsequently, different techniques currently adopted structures discussed particular emphasis theoretical rationale practical achievements. also highlight promises recently established computational design approaches developing applications. Lastly, discussion is concluded perspectives current challenges future opportunities. hope this review will present beauty structure–activity relationships catalysis sciences contribute advance conversion
Язык: Английский
Процитировано
144Journal of Energy Storage, Год журнала: 2023, Номер 62, С. 106934 - 106934
Опубликована: Март 18, 2023
Язык: Английский
Процитировано
123Carbon, Год журнала: 2022, Номер 196, С. 347 - 353
Опубликована: Апрель 27, 2022
Язык: Английский
Процитировано
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