Electronic structure regulation and polysulfide bonding of Co-doped (Ni, Fe)1+xS enable highly efficient and stable electrocatalytic overall water splitting

Huang, Yuan; Jiang, Li‐Wen; Liu, Hong; Wang, Jianjun

doi:10.1016/j.cej.2022.136121

Cited by 64 publications

(28 citation statements)

References 55 publications

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“…The peaks located at 31.9°, 34.6°, 36.4°, 47.6°, 56.7°, 63.0 and 68.0° can be well-indexed to the (100), (002), (101), (102), (110), (103) and (112) planes of the zincite (ZnO 2 , JCPDS 36–1451), respectively. 37–39 Besides the ZnO peaks, the emerging peaks of ZnO@ZIF-8 can be ascribed to the crystal of ZIF-8. 40,41 For the CNTs-based CNTs@Ni(OH) 2 and CNTs@CoO–Ni(OH) 2 composites, no peak associated with nickel hydroxide can be observed (Fig.…”

Section: Resultsmentioning

confidence: 99%

Synergism of CoO–Ni(OH)₂ nanosheets and MOF-derived CNTs array for methanol electrolysis

Deng,

Liu,

Liu

et al. 2023

Green Chem.

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Section: Resultsmentioning

confidence: 99%

Synergism of CoO–Ni(OH)₂ nanosheets and MOF-derived CNTs array for methanol electrolysis

Deng,

Liu,

Liu

et al. 2023

Green Chem.

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“…The peak at 530.8 eV of O 1s corresponds to the formation of metal oxide, shown in Figure 2f. [61,62] The XPS result indicates the nanoparticles' successful formation without impurities. [63] FESEM and HRTEM were carried out to investigate the morphology and microstructure of synthesized nanoparticles.…”

Section: Chemcatchemmentioning

confidence: 98%

Alkaline Water Splitting Using Hafnium‐Based Stable and Efficient Bifunctional Electrocatalyst

2023

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The desire to achieve sustainable development goals inspired exploring green energy as a favorable alternative to hazardous fossil fuel‐based energy. Alkaline water electrolysis is a promising candidate for producing low‐cost pure green hydrogen; however, the efficiency of non‐precious transitional metal‐based catalysts is still behind noble electrocatalysts (like Pt and IrO2). To make hydrogen a next‐generation fuel, the replacement of high‐cost scarce noble metal is required. An attempt has been made to use a non‐precious transitional bimetallic combination of hafnium nickel diselenide/ reduced graphene oxide (HfNiSe2/rGO) for HER, OER, and overall water splitting. HfNiSe2/rGO demonstrated good electrocatalytic performance; for achieving 10 mA/cm2 of current density, the overpotential requirement is 162 mV for hydrogen evolution reaction (HER) and 320 mV for oxygen evolution reaction (OER) at 20 mA/cm2 of current density. Similarly, a low Tafel slope is required, 49 mV dec−1 for HER and 66 mV dec−1 for OER in 1 M KOH with high stability. HfNiSe2/rGO also showed highly stable activity for overall water splitting, requiring only 1.56 V to attain 10 mA/cm2 of current density. The result indicates HfNiSe2/rGO is a suitable electrocatalyst for green hydrogen generation because of its ease of production, economical, good activity, and stability towards water splitting.

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“…[26,51] The enhanced photocurrent density highlights the role of the Ti dopant in tuning the electronic structure of hematite for enhanced conductivity. [52,53] However, the moderate peak presentation observed for all the NRs samples in the (110) plane might have hindered the charge mobility resulting into high electron-hole pair recombination and subsequently the low photocurrent density values realized. [54] 2.6.…”

Section: Photocurrent Density Measurementsmentioning

confidence: 99%

Erbium and Titanium Co‐Doped Hematite Nanorods: Structural, Optical, and Catalytic Properties for Enhanced Water Splitting

Talibawo

Kyesmen

Cyulinyana

et al. 2023

Physica Status Solidi (a)

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Herein, hydrothermally synthesized hematite nanorods (NRs) co‐doped with erbium and titanium, using titanium tetrachloride and erbium(III) nitrate pentahydrate as the dopant sources, are presented. The effect of varied volumes of the erbium/titanium surface co‐dopants on the morphology, structural, optical, and photoelectrochemical (PEC) properties of hematite NRs is investigated. The pristine hematite, 40 μL‐Er, and 40 μL‐Er/20 μL‐Ti‐doped NRs samples present a similar surface morphology of vertically aligned NRs. The NRs are randomly oriented with an increase in titanium dopant for the 40 μL‐Er/30 μL‐Ti‐doped NRs and later coalesced for the 40 μL‐Er/40 μL‐Ti‐doped NRs. The structural analysis based on X‐ray diffraction and Raman analysis present a uniform, pure hematite phase for all the prepared NRs. The samples exhibit high photon absorbance with peaks in the 400–450 nm wavelength range of the visible spectrum. The 40 μL‐Er/40 μL‐Ti‐doped NRs sample present the highest photocurrent density of 83.9 μA cm−2 at 1.4 V vs reversible hydrogen electrode (RHE) and is attributed to the lowest flat band potential (−0.76 V vs RHE) that enhances charge mobility at the electrode–electrolyte interface. These results reveal the facile erbium/titanium doping of hematite NRs as a viable strategy for enhancing their PEC water‐splitting performance.

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Electronic structure regulation and polysulfide bonding of Co-doped (Ni, Fe)1+xS enable highly efficient and stable electrocatalytic overall water splitting

Cited by 64 publications

References 55 publications

Synergism of CoO–Ni(OH)₂ nanosheets and MOF-derived CNTs array for methanol electrolysis

Synergism of CoO–Ni(OH)₂ nanosheets and MOF-derived CNTs array for methanol electrolysis

Alkaline Water Splitting Using Hafnium‐Based Stable and Efficient Bifunctional Electrocatalyst

Erbium and Titanium Co‐Doped Hematite Nanorods: Structural, Optical, and Catalytic Properties for Enhanced Water Splitting

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Electronic structure regulation and polysulfide bonding of Co-doped (Ni, Fe)1+xS enable highly efficient and stable electrocatalytic overall water splitting

Cited by 64 publications

References 55 publications

Synergism of CoO–Ni(OH)2 nanosheets and MOF-derived CNTs array for methanol electrolysis

Synergism of CoO–Ni(OH)2 nanosheets and MOF-derived CNTs array for methanol electrolysis

Alkaline Water Splitting Using Hafnium‐Based Stable and Efficient Bifunctional Electrocatalyst

Erbium and Titanium Co‐Doped Hematite Nanorods: Structural, Optical, and Catalytic Properties for Enhanced Water Splitting

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Product

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Synergism of CoO–Ni(OH)₂ nanosheets and MOF-derived CNTs array for methanol electrolysis

Synergism of CoO–Ni(OH)₂ nanosheets and MOF-derived CNTs array for methanol electrolysis