Surface active-site engineering in hierarchical PtNi nanocatalysts for efficient triiodide reduction reaction

Cui, Jiabin; Ma, P.; Li, Weidan; Jiang, Rui; Zheng, Lirong; Lin, Yuan; Guo, Chang; Yin, Xiuli; Wang, Leyu

doi:10.1007/s12274-021-3410-y

Cited by 11 publications

(11 citation statements)

References 35 publications

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“…Spectroscopy analysis mainly includes infrared spectroscopy (FTIR), Raman spectroscopy (Ram), ultraviolet-visible absorption spectroscopy, fluorescence spectroscopy, nuclear magnetic resonance spectroscopy, X-ray photoelectron spectroscopy X-ray diffraction [57], Fourier transform infrared spectroscopy (FTIR) [58], diffuse reflection infrared Fourier transform spectroscopy (FLEDS), electrochemical impedance spectroscopy (EIS) [59], X-ray absorption near-edge structure (XANES) spectrum, energy dispersive X-spectrum [60], etc. Characterization of the catalyst by spectroscopy technology can explore the physical and chemical properties of single-atom catalysts, also reveal the significant differences between single-atom catalysts and traditional nano-metal catalysts, and further clarify the catalytic reaction mechanism.…”

Section: Spectroscopy Analysismentioning

confidence: 99%

Research Progress and Application of Single-Atom Catalysts: A Review

Wang²,

Liu

et al. 2021

Molecules

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Due to excellent performance properties such as strong activity and high selectivity, single-atom catalysts have been widely used in various catalytic reactions. Exploring the application of single-atom catalysts and elucidating their reaction mechanism has become a hot area of research. This article first introduces the structure and characteristics of single-atom catalysts, and then reviews recent preparation methods, characterization techniques, and applications of single-atom catalysts, including their application potential in electrochemistry and photocatalytic reactions. Finally, application prospects and future development directions of single-atom catalysts are outlined.

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Section: Spectroscopy Analysismentioning

confidence: 99%

Research Progress and Application of Single-Atom Catalysts: A Review

Wang²,

Liu

et al. 2021

Molecules

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“…Electrocatalytic activity of the Mo–N–C SAC, N–C, and Pt toward the Co 3+/2+ (bpy) 3 redox reaction was evaluated using cyclic voltammetry measurement accordingly. ,, One pair of peaks was observed for all three catalysts (Figure a). As for CV measurement, two parameters are often used to evaluate the catalytic activity: peak-to-peak separation ( E pp ) and peak current density ( I pa ), as shown in Figure S7 .…”

Section: Results and Discussionmentioning

confidence: 99%

“…Moreover, density functional theory calculations are further performed to identify the active sites and elucidate the electrocatalytic mechanism. , Generally, the Co(bpy) 3 3+ reduction reaction in hybrid photovoltaics could be described as follows: where * denotes the active sites on the catalyst, and (sol) represents the solvent . During the process of a regenerative cycle in the device, Co 3+ (bpy) 3 ions are first absorbed on the active sites of the catalyst eq .…”

Section: Results and Discussionmentioning

confidence: 99%

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Molybdenum-Single Atom Catalyst for High-Efficiency Cobalt(III)/(II)-Mediated Hybrid Photovoltaics

Wang

et al. 2022

ACS Appl. Energy Mater.

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The exploration of catalysts with remarkable activity and good stability toward the Co2+/3+(bpy)3 redox reaction is highly desirable for hybrid photovoltaics. In this study, Mo-single-atom catalysts have been successfully synthesized through a facile “embedding–sintering–etching” approach. The as-obtained Mo- single-atom catalysts (SACs) featured the coordination of each Mo-single atom with four nitrogen atoms (Mo1–N4) within the nitrogen-doped carbon (N–C) support, which was verified by X-ray absorption fine structure analysis and high-angle annular dark-field scanning transmission electron microscopy. The electrocatalytic performance of the Mo–N–C SACs outperformed the activity of the reference N–C and Pt counterpart toward the Co2+/3+(bpy)3 redox reaction. Moreover, compared with the Pt counterpart, the Mo–N–C SACs presented good stability toward the Co2+/3+(bpy)3 redox reaction during the durability test. The power conversion efficiency of hybrid photovoltaics employing the Mo–N–C SAC-based cathode was up to 10.71%, which could be comparable to the device with the Pt counterpart (10.43%), exceeding that with reference N–C (7.17%). The Kelvin probe force microscopy measurement revealed that a moderate energy-level matching with the Co2+/3+(bpy)3 redox couple was achieved after the formation of Mo1–N4 moieties within the N–C support, which contributed to the enhanced catalytic activity. The superior catalytic activity correlated with favorable adsorption of Co2+/3+(bpy)3 redox and electron transferring from Mo1–N4 moieties to Co2+/3+(bpy)3 redox, which was confirmed by density functional theory calculations.

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“…However, due to the poor electrical and ionic conductivity, the overall performance is rather low. To alleviate this problem, NiO nanoparticles have been combined with several conductive materials. − Carbon materials demonstrated a potential ability to enhance the conductivity of NiO and hence the overall performance of DSSC via the synergistic effect . Recently, a NiO-multiwalled carbon nanotubes (MWCNTs) composite was prepared and utilized as CE for DSSCs, the assembled device exhibited a PCE of 3.80% .…”

Section: Introductionmentioning

confidence: 99%

Efficient NiO Impregnated Walnut Shell-Derived Carbon for Dye-Sensitized Solar Cells

Ahmed

Xiang

Abdelmotalleib

et al. 2022

ACS Appl. Electron. Mater.

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The conversion of biowaste into useful materials for technological uses has received a lot of interest in recent years. Here, a NiO@walnut shell (WS)-derived carbon composite (NiO@WS-derived carbon) was synthesized to be employed as an alternate counter electrode (CE) in dye-sensitized solar cells (DSSCs). The morphological studies demonstrated that NiO nanoparticles were uniformly impregnated into the WS-derived carbon frameworks. The electrochemical investigations showed that the NiO@WS-derived carbon composite CE displayed high catalytic activity and significant stability toward the I 3 − /I − redox couple after 100 CV cycles. The charge-transfer resistance of the NiO@WS-derived carbon composite CE (2.21 Ω) was also lower than that of the Pt-CE (3.04 Ω).

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Surface active-site engineering in hierarchical PtNi nanocatalysts for efficient triiodide reduction reaction

Cited by 11 publications

References 35 publications

Research Progress and Application of Single-Atom Catalysts: A Review

Research Progress and Application of Single-Atom Catalysts: A Review

Molybdenum-Single Atom Catalyst for High-Efficiency Cobalt(III)/(II)-Mediated Hybrid Photovoltaics

Efficient NiO Impregnated Walnut Shell-Derived Carbon for Dye-Sensitized Solar Cells

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