Topochemical domain engineering to construct 2D mosaic heterostructure with internal electric field for high-performance overall water splitting

Quan, Quan; Zhang, Yuxuan; Wang, Fei; Bu, Xiuming; Wang, Wei; Meng, You; Xie, Pengshan; Chen, Dong; Li, Dengji; Liu, Chuntai; Yip, SenPo; Ho, Johnny C.

doi:10.1016/j.nanoen.2022.107566

Cited by 25 publications

(8 citation statements)

References 43 publications

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“…As for the P 2p spectrum, only the P–O peak is observed because of the inevitable surface oxidation when metal phosphides are exposed to air (Figure S12c). After the Ar ion sputtering, two major peaks assigned to the P 2p3/2 and P 2p1/2 of metal phosphides appear (Figure f). , It should be noted that both the Ni 2p peaks and Mo 3d peaks of NiMoO 4 @NiFeP are positively shifted by 0.92 and 0.72 eV relative to C-NiMoO 4 , respectively. On the contrary, the P 2p peaks of NiMoO 4 @NiFeP are negatively shifted by 0.25 eV relative to P-NiMoO 4 .…”

Section: Resultsmentioning

confidence: 99%

Engineered Superhydrophilic/Superaerophobic Array Electrode Composed of NiMoO₄@NiFeP for High-Performance Overall Water/Seawater Splitting

Guo

Zhao

Zong

et al. 2023

ACS Sustainable Chem. Eng.

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Exploring advanced electrocatalysts for overall water/seawater splitting is significant to massive green hydrogen production. Here, we report a novel self-sacrificing template strategy to fabricate a heterostructured NiMoO 4 @NiFeP electrode with superwetting properties as a bifunctional electrocatalyst for overall water/seawater splitting. Such an electrode exhibits superior intrinsic activity, more accessible active sites, effective charge transfer, and weak adhesion of gas bubbles. Its excellent corrosion resistance and superhydrophilic/superaerophobic nanoarrayed architecture ensure its catalytic performance under harsh seawater conditions. Accordingly, the electrode requires overpotentials of only 282 and 195 mV at 100 mA cm −2 for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in 1 M KOH seawater together with its robust durability. Operando Raman spectroscopy together with ex situ characterization technologies reveal that NiMoO 4 @NiFeP was rapidly reconstructed to active Fe-doped β-Ni oxyhydroxides (β-Fe/NiOOH) during alkaline OER. Density functional theory calculations further disclose that Fe doping can optimize the energy barrier and modulate the d-band center of the catalyst, intrinsically boosting the OER performance. Consequently, the NiMoO 4 @NiFeP-assembled electrolyzer requires a voltage of 1.71 V at 100 mA cm −2 for seawater splitting and can stably maintain over 200 h without producing any hypochlorite. Our work holds great promise for constructing efficient non-noble-metal bifunctional electrodes toward water/seawater electrolysis applications.

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Section: Resultsmentioning

confidence: 99%

Engineered Superhydrophilic/Superaerophobic Array Electrode Composed of NiMoO₄@NiFeP for High-Performance Overall Water/Seawater Splitting

Guo

Zhao

Zong

et al. 2023

ACS Sustainable Chem. Eng.

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“…Moreover, the intertwined NPCNTs with a great number of mesopores encouraged the mass transfer of reactants and intermediates. In fact, the BIEF derived from Mott–Schottky heterojunctions shows potential whether for alkaline OER or HER. , Xue and co-workers exploited a Mott–Schottky electrocatalyst (Ni/CeO 2 @N-CNFs) via an electrospinning–carbonization tactic for alkaline water spitting. The isosurface of the charge difference suggested that BIEF induced by the self-driven charge transfer promoted unpaired electron delocalization.…”

Section: Bief In Electrocatalysismentioning

confidence: 99%

Designing a Built-In Electric Field for Efficient Energy Electrocatalysis

et al. 2022

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To utilize intermittent renewable energy as well as achieve the goals of peak carbon dioxide emissions and carbon neutrality, various electrocatalytic devices have been developed. However, the electrocatalytic reactions, e.g., hydrogen evolution reaction/ oxygen evolution reaction in overall water splitting, polysulfide conversion in lithium− sulfur batteries, formation/decomposition of lithium peroxide in lithium−oxygen batteries, and nitrate reduction reaction to degrade sewage, suffer from sluggish kinetics caused by multielectron transfer processes. Owing to the merits of accelerated charge transport, optimized adsorption/desorption of intermediates, raised conductivity, regulation of the reaction microenvironment, as well as ease to combine with geometric characteristics, the built-in electric field (BIEF) is expected to overcome the above problems. Here, we give a Review about the very recent progress of BIEF for efficient energy electrocatalysis. First, the construction strategies and the characterization methods (qualitative and quantitative analysis) of BIEF are summarized. Then, the up-to-date overviews of BIEF engineering in electrocatalysis, with attention on the electron structure optimization and reaction microenvironment modulation, are analyzed and discussed in detail. In the end, the challenges and perspectives of BIEF engineering are proposed. This Review gives a deep understanding on the design of electrocatalysts with BIEF for nextgeneration energy storage and electrocatalytic devices.

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“…Second, the high electron mobility within the low‐dimensional structure can substantially improve the electronic conductivity, which also plays a crucial role in affecting the electrocatalytic performance of catalysts [91] . Third, the rich unsaturated atomic sites in the low‐dimensional catalyst can also work as the real catalytic active sites to further improve the catalytic performance [92–95] . All of these unique properties enable the low‐dimensional nanocatalysts to display superb electrocatalytic performance.…”

Section: Properties Of Low‐dimensional Architecturesmentioning

confidence: 99%

“…[91] Third, the rich unsaturated atomic sites in the low-dimen-sional catalyst can also work as the real catalytic active sites to further improve the catalytic performance. [92][93][94][95] All of these unique properties enable the low-dimensional nanocatalysts to display superb electrocatalytic performance.…”

Section: Properties Of Low-dimensional Architecturesmentioning

confidence: 99%

Low‐Dimensional High‐Entropy Alloys for Advanced Electrocatalytic Reactions

Tao

Huang²,

Zhao

2023

The Chemical Record

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Low‐dimensional high‐entropy alloy (HEA) nanomaterials are widely employed as electrocatalysts for energy conversion reactions, due to their inherent advantages, including high electron mobility, rich catalytically active site, optimal electronic structure. Moreover, the high‐entropy, lattice distortion, and sluggish diffusion effects also enable them to be promising electrocatalysts. A thorough understanding on the structure‐activity relationships of low‐dimensional HEA catalyst play a huge role in the future pursuit of more efficient electrocatalysts. In this review, we summarize the recent progress of low‐dimensional HEA nanomaterials for efficient catalytic energy conversion. By systematically discussing the fundamentals of HEA and properties of low‐dimensional nanostructures, we highlight the advantages of low‐dimensional HEAs. Subsequently, we also present many low‐dimensional HEA catalysts for electrocatalytic reactions, aiming to gain a better understanding on the structure‐activity relationship. Finally, a series of upcoming challenges and issues are also thoroughly proposed as well as their future directions.

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Topochemical domain engineering to construct 2D mosaic heterostructure with internal electric field for high-performance overall water splitting

Cited by 25 publications

References 43 publications

Engineered Superhydrophilic/Superaerophobic Array Electrode Composed of NiMoO₄@NiFeP for High-Performance Overall Water/Seawater Splitting

Engineered Superhydrophilic/Superaerophobic Array Electrode Composed of NiMoO₄@NiFeP for High-Performance Overall Water/Seawater Splitting

Designing a Built-In Electric Field for Efficient Energy Electrocatalysis

Low‐Dimensional High‐Entropy Alloys for Advanced Electrocatalytic Reactions

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Topochemical domain engineering to construct 2D mosaic heterostructure with internal electric field for high-performance overall water splitting

Cited by 25 publications

References 43 publications

Engineered Superhydrophilic/Superaerophobic Array Electrode Composed of NiMoO4@NiFeP for High-Performance Overall Water/Seawater Splitting

Engineered Superhydrophilic/Superaerophobic Array Electrode Composed of NiMoO4@NiFeP for High-Performance Overall Water/Seawater Splitting

Designing a Built-In Electric Field for Efficient Energy Electrocatalysis

Low‐Dimensional High‐Entropy Alloys for Advanced Electrocatalytic Reactions

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Product

Resources

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Engineered Superhydrophilic/Superaerophobic Array Electrode Composed of NiMoO₄@NiFeP for High-Performance Overall Water/Seawater Splitting

Engineered Superhydrophilic/Superaerophobic Array Electrode Composed of NiMoO₄@NiFeP for High-Performance Overall Water/Seawater Splitting