Construction of Porous Mo<sub>3</sub>P/Mo Nanobelts as Catalysts for Efficient Water Splitting

Li, Feng; Han, Gao‐Feng; Noh, Hyuk‐Jun; Lu, Yalin; Xu, Jing; Bu, Yunfei; Fu, Zhengping; Baek, Jong‐Beom

doi:10.1002/ange.201808844

Cited by 63 publications

(5 citation statements)

References 37 publications

(11 reference statements)

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“…The Co-Ni-P/NF shows HER and OER performance favorably comparable with that of noble metal catalysts, in agreement with previous reports. 8,[16][17][18][19] It is worth mentioning that the OER performance of Co-Ni-P/NF was also tested in 0.5M H 2 SO 4 , showing rapid degradation and negligible catalytic activity (not shown here). Given the capability of catalyzing both HER and OER in 1.0M NaOH, we tested the overall water electrolysis performance of two symmetric Co-Ni-P/NF electrodes in 1.0M NaOH firstly using a two-compartment Teflon cell separated by a Fumatech AEM (denoted as Co-Ni-P/NF‖AEM‖Co-Ni-P/ NF), mimicking anion exchange membrane water electrolysis (AEM-WE).…”

Section: Resultsmentioning

confidence: 99%

Stable overall water splitting in an asymmetric acid/alkaline electrolyzer comprising a bipolar membrane sandwiched by bifunctional cobalt‐nickel phosphide nanowire electrodes

Amorim

et al. 2020

Carbon Energy

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Water splitting has been proposed to be a promising approach to producing clean hydrogen fuel. The two half-reactions of water splitting, that is, the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), take place kinetically fast in solutions with completely different pH values. Enabling HER and OER to simultaneously occur under kinetically favorable conditions while using exclusively low-cost, earth-abundant electrocatalysts is highly desirable but remains a challenge. Herein, we demonstrate that using a bipolar membrane (BPM) we can accomplish HER in a strongly acidic solution and OER in a strongly basic solution, with bifunctional self-supported cobaltnickel phosphide nanowire electrodes to catalyze both reactions. Such asymmetric acid/alkaline water electrolysis can be achieved at 1.567 V to deliver a current density of 10 mA/cm 2 with ca. 100% Faradaic efficiency. Moreover, using an "irregular" BPM with unintentional crossover the voltage needed to afford 10 mA/cm 2 can be reduced to 0.847 V, due to the assistance of electrochemical neutralization between acid and alkaline. Furthermore, we show that BPM-based asymmetric water electrolysis can be accomplished in a circulated single-cell electrolyzer delivering 10 mA/cm 2 at 1.550 V and splitting water very stably for at least 25 hours, and that water electrolysis is enabled by a solar panel operating at 0.908 V (@13 mA/cm 2), using an "irregular" BPM. BPMbased asymmetric water electrolysis is a promising alternative to conventional proton and anion exchange membrane water electrolysis.

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Section: Resultsmentioning

confidence: 99%

Stable overall water splitting in an asymmetric acid/alkaline electrolyzer comprising a bipolar membrane sandwiched by bifunctional cobalt‐nickel phosphide nanowire electrodes

Amorim

et al. 2020

Carbon Energy

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Section: Resultsmentioning

confidence: 99%

“…As an important rate-determining factor for HER 44 – 46 , the H 2 O dissociation performance on the surfaces of the above constructed models are further investigated and compared with Pt(111) (Supplementary Fig. 29 ) 46 . The H 2 O dissociation energies, either thermodynamically upward with low energy barrier or thermodynamically downward, indicate that H 2 O dissociation is easy to occur on the surface of catalysts.…”

Section: Resultsmentioning

confidence: 99%

Two-dimensional mineral hydrogel-derived single atoms-anchored heterostructures for ultrastable hydrogen evolution

et al. 2022

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

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“…(1)(2)(3) Catalysts are essential to overcome various activation barriers that are signi cantly larger than the theoretical minimum of 1.23 volts. (4-8) Though considerable progress has been made in the search for high-performance catalysts, and some of them even outperform the state-of-the-art noble catalysts, (9)(10)(11)(12) it remains a challenge to run the reaction e ciently and economically. Thus, the identi cation of durable catalysts that could afford the industrial scale current density (> 500 mA cm − 2 ) is crucial for the forthcoming hydrogen economy.…”

Section: Introductionmentioning

confidence: 99%

Observation of a robust and highly active catalyst for water electrolysis under the current density of 1000 mA cm-2

Zhang

Arpino

Yang

et al. 2022

Preprint

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Despite the fruitful achievements in the development of hydrogen production catalysts with record-breaking performances, there is still a lack of durable catalysts that could work under large current densities (> 1000 mA cm− 2). In the context of this need, we investigated the catalytic behaviors of Sr2RuO4 (SRO) bulk single crystals with well-defined surface crystal structures, which is a benchmark material to explore exotic metallic states and electronic structures. This single crystal has demonstrated remarkable activities under the current density of 1000 mA cm− 2, which require overpotentials of 182 and 278 mV in 0.5 M H2SO4 and 1 M KOH electrolytes, respectively, after ohmic correction. These values slightly increased to 272 and 354 mV even without iR correction, exhibiting high potential for industrial-scale hydrogen production. The high performance is also evidenced by the 56 days of continuous testing at a high current density of above 1000 mA cm− 2 and then under operating temperatures of 70 ℃ for alkaline electrolysis. The in-situ formation of ferromagnetic Ru clusters at the crystal surface is critical for the outstanding catalytic activity, endowing the single-crystal catalyst with low charge transfer resistance and high wettability for rapid gas bubble removal. Density functional theory calculations indicate that SRO gains electrons from the Ru clusters, thus leading to the thermodynamically favorable hydrogen desorption for the rapidly modified catalysts. More generally, our experiment exemplifies the potential of designing novel HER catalysts that work under industrial-scale current density.

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Construction of Porous Mo₃P/Mo Nanobelts as Catalysts for Efficient Water Splitting

Cited by 63 publications

References 37 publications

Stable overall water splitting in an asymmetric acid/alkaline electrolyzer comprising a bipolar membrane sandwiched by bifunctional cobalt‐nickel phosphide nanowire electrodes

Stable overall water splitting in an asymmetric acid/alkaline electrolyzer comprising a bipolar membrane sandwiched by bifunctional cobalt‐nickel phosphide nanowire electrodes

Two-dimensional mineral hydrogel-derived single atoms-anchored heterostructures for ultrastable hydrogen evolution

Observation of a robust and highly active catalyst for water electrolysis under the current density of 1000 mA cm-2

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Construction of Porous Mo3P/Mo Nanobelts as Catalysts for Efficient Water Splitting

Cited by 63 publications

References 37 publications

Stable overall water splitting in an asymmetric acid/alkaline electrolyzer comprising a bipolar membrane sandwiched by bifunctional cobalt‐nickel phosphide nanowire electrodes

Stable overall water splitting in an asymmetric acid/alkaline electrolyzer comprising a bipolar membrane sandwiched by bifunctional cobalt‐nickel phosphide nanowire electrodes

Two-dimensional mineral hydrogel-derived single atoms-anchored heterostructures for ultrastable hydrogen evolution

Observation of a robust and highly active catalyst for water electrolysis under the current density of 1000 mA cm-2

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Construction of Porous Mo₃P/Mo Nanobelts as Catalysts for Efficient Water Splitting