Exploring advanced electrolysis techniques for attaining scene-adaptive and on-site green H2 production is an imperative matter of utmost practical significance but grand challenge remains. Herein, drawn inspiration f...
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Exploring advanced electrolysis techniques for attaining scene-adaptive and on-site green H2 production is an imperative matter of utmost practical significance but grand challenge remains. Herein, drawn inspiration from a spontaneous hydrazine-H2O galvanic cell configured on a low-valence Ru single atoms-loaded Mo2C electrode (RuSA/v-Mo2C), an alternative H2 energy solution utilizing self-powered electrochemical hydrazine splitting (N2H4 -> 2H2 + N2) instead of the stereotyped electricity-consumed water splitting for green H2 production is proposed. This solution highlights a pH-decoupled hydrazine-H2O primary battery with notable open-circuit voltage of 1.37 V and energy density up to 358 Wh gN2H4-1, which powerfully propels an alkaline hydrazine splitting cell, leading to bilateral H2 harvest with a remarkable rate of 18 mol h-1 m-2, i.e., 403.2 L h-1 m-2, setting a new record for the self-sustaining electricity-powered H2 production systems. The success of RuSA/v-Mo2C for this solution is further decoded by tandem theoretical and in situ spectroscopic studies, cross-verifying a Ru-Mo dual-site synergy in streamlining the overall energy barriers, thereby enhancing the kinetics of electrode reactions. This pioneering work, showcasing electrochemical H2 production free from both external energy and feedstock inputs, opens up a new horizon on way of the ultimate H2 energy solution.
Regional distribution network operation can be conducive for privacy protection, efficient calculation, grid modularity, and network scalability, which awfully tally with decentralized energy trade mechanism - peer-to...
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Using hydrogen as a fuel is an effective way to combat the energy crisis, at the same time, reduce greenhouse gas emissions. Designing high-performance and low-cost catalysts for the hydrogen evolution reaction (HER) ...
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Using hydrogen as a fuel is an effective way to combat the energy crisis, at the same time, reduce greenhouse gas emissions. Designing high-performance and low-cost catalysts for the hydrogen evolution reaction (HER) is critical for commercial seawater electrolysis. Here, we designed a heterostructured Co2P-MoNiP/NF nano-sea-urchin catalyst that only showed an overpotential of 46 mV for 10 mA cm-2 to actuate HER in alkaline elec-trolytes along with superior stability. Theoretical calculations demonstrate that the constructed heterogeneous interfaces effectively promote the redistribution of the charge density and optimize the adsorbed hydrogen in-termediates, lowering the hydrogen adsorption free energy barrier and promoting H2 desorption, thus boosting the HER activity. Moreover, the assembled two-electrode electrolyzer only required ultra-low voltages of 1.51 and 1.66 V to deliver current densities of 10 and 100 mA cm-2, respectively. The solar-driven water electrolysis system achieves a high and stable solar-to-hydrogen (STH) conversion efficiency of 19.68 %.
The datasets for the tier-1 Scenario Model Intercomparison Project(ScenarioMIP)experiments from the Chinese Academy of Sciences(CAS)Flexible Global Ocean-Atmosphere-Land System model,finite-volume version 3(CAS FGOALS...
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The datasets for the tier-1 Scenario Model Intercomparison Project(ScenarioMIP)experiments from the Chinese Academy of Sciences(CAS)Flexible Global Ocean-Atmosphere-Land System model,finite-volume version 3(CAS FGOALS-f3-L)are described in this *** is one of the core MIP experiments in phase 6 of the Coupled Model Intercomparison Project(CMIP6).Considering future CO2,CH4,N2O and other gases’concentrations,as well as land use,the design of ScenarioMIP involves eight pathways,including two tiers(tier-1 and tier-2)of ***-1 includes four combined Shared Socioeconomic Pathways(SSPs)with radiative forcing,i.e.,SSP1-2.6,SSP2-4.5,SSP3-7.0 and SSP5-8.5,in which the globally averaged radiative forcing at the top of the atmosphere around the year 2100 is approximately 2.6,4.5,7.0 and 8.5 W m−2,*** study provides an introduction to the ScenarioMIP datasets of this model,such as their storage location,sizes,variables,*** analysis indicates that surface air temperatures will increase by about 1.89℃,3.07℃,4.06℃ and 5.17℃ by around 2100 under these four scenarios,***,some other key climate variables,such as sea-ice extension,precipitation,heat content,and sea level rise,also show significant long-term trends associated with the radiative forcing *** datasets will help us understand how the climate will change under different anthropogenic and radiative forcings.
The development and application of durable and efficient non-precious metal-based electrocatalysts are particularly crucial for hydrogen production using overall water-splitting technology. Herein, a simple method was...
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The development and application of durable and efficient non-precious metal-based electrocatalysts are particularly crucial for hydrogen production using overall water-splitting technology. Herein, a simple method was employed to synthesize Mo-doped NiCoP nanowires on a metallic 3D Ni foam (Mo-NiCoP/NF) for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). This long-term stable MoNiCoP/NF catalyst demonstrated comparatively low overpotentials and excellent dual-functional catalytic performances. The overpotentials for the HER and OER were 64 and 262 mV, respectively, to actuate a current density of 10 mA cm-2 in an alkaline environment (1 M KOH). Meanwhile, when this electrocatalyst was utilized for overall water splitting, a cell voltage of 1.56 V could supply a current density of 10 mA cm-2 for at least 50 h with a negligible performance drop. This work provides an advanced approach to developing non-noble metal phosphide nanostructures as monolithic dual-functional electrocatalysts for overall alkaline water splitting. (c) 2022 Elsevier B.V. All rights reserved.
The widespread prevalence of microplastics (MPs) in the environment poses concerns as they are vectors of antibiotic resistance genes (ARGs). The relationships between antibiotic resistomes and MPs remain unexplored i...
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To solve the problem of low hydrogen production efficiency from water electrolysis, increasing research is focusing on improving the efficiency of the complex oxygen evolution reaction (OER) that occurs at the anode. ...
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To solve the problem of low hydrogen production efficiency from water electrolysis, increasing research is focusing on improving the efficiency of the complex oxygen evolution reaction (OER) that occurs at the anode. The preparation of high-efficiency OER electrocatalysts is key to improving the OER efficiency and the only way forward. In this work, a NiFeCo ternary OER high-efficiency electrocatalyst, NiFeCoP@CAP/NF, comprising coexisting crystalline and amorphous phases (CAP), was prepared on nickel foam (NF) by a simple one-step hydrothermal reaction and high-temperature gas-phase phosphating. The as-synthesized catalyst exhibits an ultralow overpotential of 202 mV (10 mA cm-2) in 1 M KOH solution with a Tafel slope (eta 10 = 202 mV) of 28.9 mV dec- 1. Further, it is understood that owing to the combination of the crystalline and amorphous phases, the catalyst can rapidly transform the amorphous phase into the true active (NiOOH) phase of the OER process while retaining the fast charge transport properties of the crystalline phase, as observed by in situ Raman analysis.
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