Tuning the band (p and d) center and enhancing the active sites by nitrogen(N) doping on iridium diphosphide (IrP2) for accelerating pH-universal water electrolysis

Roy, Sanjib Baran; Moon, Sunil; kim, Kwang Hee; Patil, Amar M.; Yoo, Sang Hyuk; Seo, Youngho; Park, Jae Hyung; Kang, Keonwook; Jun, Seong Chan

doi:10.1016/j.apcatb.2022.121906

Cited by 30 publications

(7 citation statements)

References 54 publications

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“…Moreover, the migration rate of Zn 2+ (in ZIBs) or OH – (in ZABs) in the electrolyte is dominantly affected by ionic conductivity. The low ionic conductivity in flexible electrolytes, such as hydrogels, xanthan gums, and gelatins, also results in unfavorable battery performance. ,− To achieve a stabilized cycling and longer lifespan, researchers have to come up with many designs to reduce these disadvantages for the practical applications of flexible Zn-based batteries.…”

Section: Fundamentals and Mechanisms Of Zn-based Batteriesmentioning

confidence: 99%

Rational Design of Flexible Zn-Based Batteries for Wearable Electronic Devices

et al. 2023

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The advent of 5G and the Internet of Things has spawned a demand for wearable electronic devices. However, the lack of a suitable flexible energy storage system has become the “Achilles’ Heel” of wearable electronic devices. Additional problems during the transformation of the battery structure from conventional to flexible also present a severe challenge to the battery design. Flexible Zn-based batteries, including Zn-ion batteries and Zn–air batteries, have long been considered promising candidates due to their high safety, eco-efficiency, substantial reserve, and low cost. In the past decade, researchers have come up with elaborate designs for each portion of flexible Zn-based batteries to improve the ionic conductivities, mechanical properties, environment adaptabilities, and scalable productions. It would be helpful to summarize the reported strategies and compare their pros and cons to facilitate further research toward the commercialization of flexible Zn-based batteries. In this review, the current progress in developing flexible Zn-based batteries is comprehensively reviewed, including their electrolytes, cathodes, and anodes, and discussed in terms of their synthesis, characterization, and performance validation. By clarifying the challenges in flexible Zn-based battery design, we summarize the methodology from previous investigations and propose challenges for future development. In the end, a research paradigm of Zn-based batteries is summarized to fit the burgeoning requirement of wearable electronic devices in an iterative process, which will benefit the future development of Zn-based batteries.

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Section: Fundamentals and Mechanisms Of Zn-based Batteriesmentioning

confidence: 99%

Rational Design of Flexible Zn-Based Batteries for Wearable Electronic Devices

et al. 2023

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“…[17] Like the dband center theory, [25] the 𝜖 p of the strained model exhibits an obvious downshift to −2.671, in comparison to the unstrained model (−1.593). The shift of the p-band center could alter the adsorbate-surface (catalyst) interaction, [26,27] thereby promoting the photocatalytic performance. In addition, the crystal structures of the [BiBr 6 ] octahedron under strained or unstrained are further checked because the Bi 6p and Br 4p orbitals mainly contribute to the valence band maximum (VBM) and conduction band minimum (CBM) of CBB.…”

Section: Synthesis and Characterization Of S-cbb/hp-bvomentioning

confidence: 99%

Strain‐Engineering of Mesoporous Cs₃Bi₂Br₉/BiVO₄ S‐Scheme Heterojunction for Efficient CO₂ Photoreduction

Zhou

et al. 2023

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Slow charge kinetics and unfavorable CO2 adsorption/activation strongly inhibit CO2 photoreduction. In this study, a strain‐engineered Cs3Bi2Br9/hierarchically porous BiVO4 (s‐CBB/HP‐BVO) heterojunction with improved charge separation and tailored CO2 adsorption/activation capability is developed. Density functional theory calculations suggest that the presence of tensile strain in Cs3Bi2Br9 can significantly downshift the p‐band center of the active Bi atoms, which enhances the adsorption/activation of inert CO2. Meanwhile, in situ irradiation X‐ray photoelectron spectroscopy and electron spin resonance confirm that efficient charge transfer occurs in s‐CBB/HP‐BVO following an S‐scheme with built‐in electric field acceleration. Therefore, the well‐designed s‐CBB/HP‐BVO heterojunction exhibits a boosted photocatalytic activity, with a total electron consumption rate of 70.63 µmol g−1 h−1, and 79.66% selectivity of CO production. Additionally, in situ diffuse reflectance infrared Fourier transform spectroscopy reveals that CO2 photoreduction undergoes a formaldehyde‐mediated reaction process. This work provides insight into strain engineering to improve the photocatalytic performance of halide perovskite.

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“…The density of states analysis for B-CoO/Co@NC (Ar) and B-CoO/Co@NC (10% H 2 ) heterostructures in Figure 8e shows the localization of electronic states near the Fermi level and the filled electronic states of B-CoO/Co@NC (10% H 2 ), which are closer to the Fermi level in the spin-up state. This leads to an enhancement in the carrier density and electrocatalytic performance of the B-CoO/Co@NC (10% H 2 ) heterostructure for HER; [71,72] However, it also leads to higher interaction energies with the OER intermediates (*OH, *O, and *OOH). The slightly downshifted electronic states of the B-CoO/Co@NC (Ar) heterostructure promote weaker adsorption of these OER intermediates, as indicated by their Gibbs free energy in Figure 8c, thereby enhancing their OER performance.…”

Section: Mechanistic Study Using Dftmentioning

confidence: 99%

Metal–Organic Framework–Derived Mesoporous B‐Doped CoO/Co@N‐Doped Carbon Hybrid 3D Heterostructured Interfaces with Modulated Cobalt Oxidation States for Alkaline Water Splitting

Cha

Singh

Maibam

et al. 2023

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Heteroatom‐doped transition metal‐oxides of high oxygen evolution reaction (OER) activities interfaced with metals of low hydrogen adsorption energy barrier for efficient hydrogen evolution reaction (HER) when uniformly embedded in a conductive nitrogen‐doped carbon (NC) matrix, can mitigate the low‐conductivity and high‐agglomeration of metal‐nanoparticles in carbon matrix and enhances their bifunctional activities. Thus, a 3D mesoporous heterostructure of boron (B)‐doped cobalt‐oxide/cobalt‐metal nanohybrids embedded in NC and grown on a Ni foam substrate (B‐CoO/Co@NC/NF) is developed as a binder‐free bifunctional electrocatalyst for alkaline water‐splitting via a post‐synthetic modification of the metal–organic framework and subsequent annealing in different Ar/H2 gas ratios. B‐CoO/Co@NC/NF prepared using 10% H2 gas (B‐CoO/Co@NC/NF [10% H2]) shows the lowest HER overpotential (196 mV) and B‐CoO/Co@NC/NF (Ar), developed in Ar, shows an OER overpotential of 307 mV at 10 mA cm−2 with excellent long‐term durability for 100 h. The best anode and cathode electrocatalyst‐based electrolyzer (B‐CoO/Co@NC/NF (Ar)(+)//B‐CoO/Co@NC/NF (10% H2)(−)) generates a current density of 10 mA cm−2 with only 1.62 V with long‐term stability. Further, density functional theory investigations demonstrate the effect of B‐doping on electronic structure and reaction mechanism of the electrocatalysts for optimal interaction with reaction intermediates for efficient alkaline water‐splitting which corroborates the experimental results.

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Tuning the band (p and d) center and enhancing the active sites by nitrogen(N) doping on iridium diphosphide (IrP2) for accelerating pH-universal water electrolysis

Cited by 30 publications

References 54 publications

Rational Design of Flexible Zn-Based Batteries for Wearable Electronic Devices

Rational Design of Flexible Zn-Based Batteries for Wearable Electronic Devices

Strain‐Engineering of Mesoporous Cs₃Bi₂Br₉/BiVO₄ S‐Scheme Heterojunction for Efficient CO₂ Photoreduction

Metal–Organic Framework–Derived Mesoporous B‐Doped CoO/Co@N‐Doped Carbon Hybrid 3D Heterostructured Interfaces with Modulated Cobalt Oxidation States for Alkaline Water Splitting

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Tuning the band (p and d) center and enhancing the active sites by nitrogen(N) doping on iridium diphosphide (IrP2) for accelerating pH-universal water electrolysis

Cited by 30 publications

References 54 publications

Rational Design of Flexible Zn-Based Batteries for Wearable Electronic Devices

Rational Design of Flexible Zn-Based Batteries for Wearable Electronic Devices

Strain‐Engineering of Mesoporous Cs3Bi2Br9/BiVO4 S‐Scheme Heterojunction for Efficient CO2 Photoreduction

Metal–Organic Framework–Derived Mesoporous B‐Doped CoO/Co@N‐Doped Carbon Hybrid 3D Heterostructured Interfaces with Modulated Cobalt Oxidation States for Alkaline Water Splitting

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Strain‐Engineering of Mesoporous Cs₃Bi₂Br₉/BiVO₄ S‐Scheme Heterojunction for Efficient CO₂ Photoreduction