Amorphous/2H-MoS2 nanoflowers with P doping and S vacancies to achieve efficient pH-universal hydrogen evolution at high current density

Shi, Yue; Zhang, Dan; Miao, Hongfu; Wu, Xueke; Wang, Zuochao; Zhan, Tianrong; Lai, Jianping; Wang, Lei

doi:10.1007/s11426-022-1287-4

Cited by 14 publications

(17 citation statements)

References 49 publications

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“…The lattice distance of 0.246 and 0.213 nm was found to correspond to the (111) and (200) planes of Cu 2 O, and the lattice distance of 0.208 nm was attributed to the (111) plane of metallic Cu. HAADF‐STEM image and corresponding elemental mappings (Figure 2f) of Ru/Cu−Cu 2 O@C affirmed the homogeneous distribution of Cu, Ru, C, and O elements throughout the entire architecture [24] …”

Section: Resultsmentioning

confidence: 67%

“…HAADF-STEM image and corresponding elemental mappings (Figure 2f) of Ru/ CuÀ Cu 2 O@C affirmed the homogeneous distribution of Cu, Ru, C, and O elements throughout the entire architecture. [24] X-ray photoelectron spectroscopy analysis Further insights into the unique electron structure after Ru doping were obtained from X-ray photoelectron spectroscopy (XPS). The fundamental elements of Cu, Ru, O, and C were detected in the survey spectrum of Ru/CuÀ Cu 2 O@C (Figure 3a), further affirming its elemental composition.…”

Section: Synthetic Strategy and Structural Analysismentioning

confidence: 99%

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Electronic Modulation and Mechanistic Study of Ru‐Decorated Porous Cu‐Rich Cuprous Oxide for Robust Alkaline Hydrogen Oxidation and Evolution Reactions

et al. 2023

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Rational design of high‐efficiency and viable electrocatalysts is essential in overcoming the bottleneck of sluggish alkaline hydrogen oxidation/evolution reaction (HOR/HER) kinetics. In this study, a metal‐organic framework‐derived strategy for constructing a Pt‐free catalyst with Ru clusters anchored on porous Cu−Cu2O@C is proposed. The designed Ru/Cu−Cu2O@C exhibits superior HOR performance, with a mass activity of 2.7 mA μgRu-1 ${{{\rm \mu }{\rm g}}_{{\rm R}{\rm u}}^{-1}}$ at 50 mV, which is about 24 times higher than that of state‐of‐the‐art Pt/C (0.11 mA μgPt-1 ${{{\rm \mu }{\rm g}}_{{\rm P}{\rm t}}^{-1}}$ ). Significantly, Ru/Cu−Cu2O@C also displays impressive HER performance by generating 26 mV at 10 mA cm−2, which exceeds the majority of documented Ru‐based electrocatalysts. Systematic characterization and density functional theory (DFT) calculations reveal that efficient electron transfer between Ru and Cu species results in an attenuated hydrogen binding energy (HBE) of Ru and an enhanced hydroxy binding energy (OHBE) of Cu2O, together with an optimized H2O adsorption energy with Cu2O as the H2O*‐capturing site, which jointly facilitates HOR and HER kinetics.

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Section: Resultsmentioning

confidence: 67%

Section: Synthetic Strategy and Structural Analysismentioning

confidence: 99%

Electronic Modulation and Mechanistic Study of Ru‐Decorated Porous Cu‐Rich Cuprous Oxide for Robust Alkaline Hydrogen Oxidation and Evolution Reactions

et al. 2023

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“…It might be attributed to the lack of calcination, which is a critical step in changing the physical makeup of nanomaterials from amorphous to crystalline structure. 43 Notably, an amorphous structure means more uncoordinated atoms would be exposed for sorption, hence having a better sorption performance for Au(III) compared to that with a crystalline structure. 44 Both Mo and S as characteristic elements were detected from the fully scanned survey XPS spectrum of MoCOM (Fig.…”

Section: Characterization Of Mocommentioning

confidence: 99%

Importance of a nano-sized molybdenum composite synthesized using a microwave oven in the sorption enhancement of Au(iii) from the aqueous phase

Yan,

Yu,

Zhang

et al. 2024

Environ. Sci.: Nano

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“…Notably, Co 0.59 Ni 0.41 C 2 O 4 @PANI/ NF also has advanced catalytic activity at high-current-density of −1000 mA cm −2 (Figure 3g; Tables S5, and S6, Supporting Information). [43,[45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60]…”

Section: Electrochemical Activity Characterizationmentioning

confidence: 99%

Inheritable Organic‐Inorganic Hybrid Interfaces with π–d Electron Coupling for Robust Electrocatalytic Hydrogen Evolution at High‐Current‐Densities

Zhao

Yin

Deng

et al. 2022

Adv Funct Materials

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Rational heterointerface engineering is crucial for superior and robust hydrogen evolution reaction (HER). Herein, a delicate organic-inorganic hybrid heterojunction based on the assembly of oxalate with polyaniline (PANI) for HER at high-current-densities is envisioned. Strong π-d electron coupling is achieved between the delocalized π electrons of PANI and the localized d electrons of oxalate metal sites. The CoC 2 O 4 nanosheets are grown on nickel foam (NF) with Ni 2+ ions substitution by the precursor etching. By virtue of the synergy of hetero ions and π-d electron coupling, metal sites obtain sufficient exposure and electronic structure optimization. Surprisingly, the phase transition of oxalate during HER in the alkaline environment does not weaken the π-d electronic coupling of the organicinorganic hybrid interfaces. Inheritable interfacial electron interaction provides a reliable guarantee for robust stability at high-current-densities while endowing the hybrid materials with extremely low overpotentials. As expected, post-phase reconstructed Co 0.59 Ni 0.41 (OH) 2 @PANI/NF displays impressive HER activity, with a low overpotential of 43 mV@−10 mA cm −2 and robust stability at −1000 mA cm −2 for 30 h in the alkaline environment. This study sheds light on the rational heterostructure interface design and promotes the architecture of an impressive electrocatalysts system.

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Amorphous/2H-MoS2 nanoflowers with P doping and S vacancies to achieve efficient pH-universal hydrogen evolution at high current density

Cited by 14 publications

References 49 publications

Electronic Modulation and Mechanistic Study of Ru‐Decorated Porous Cu‐Rich Cuprous Oxide for Robust Alkaline Hydrogen Oxidation and Evolution Reactions

Electronic Modulation and Mechanistic Study of Ru‐Decorated Porous Cu‐Rich Cuprous Oxide for Robust Alkaline Hydrogen Oxidation and Evolution Reactions

Importance of a nano-sized molybdenum composite synthesized using a microwave oven in the sorption enhancement of Au(iii) from the aqueous phase

Inheritable Organic‐Inorganic Hybrid Interfaces with π–d Electron Coupling for Robust Electrocatalytic Hydrogen Evolution at High‐Current‐Densities

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