Etching to unveil active sites of nanocatalysts for electrocatalysis

Choi, Songa; Park, Yeji; Kim, Hee Jin; Choi, Sang Il; Lee, Kwangyeol

doi:10.1039/d1qm00233c

Cited by 9 publications

(3 citation statements)

References 174 publications

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“…The formation of a single cavity is because the Au atoms exposed at the freshly etched site are unstable and prefer to be oxidized. [38,39] The plasmonic properties of the bitten Au NPs are expected to be dependent on their opening and overall sizes. The opening size of the bitten NPs can be adjusted while the overall size is maintained unchanged (Figure 2; Figures S12 and S15, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

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Synthesis of Bitten Gold Nanoparticles with Single‐Particle Chiroptical Responses

Zhang

Chen

Chui

et al. 2023

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The introduction of structural complexity to nanoparticles brings them interesting properties. Regularity breaking has been challenging in the chemical synthesis of nanoparticles. Most reported chemical methods for synthesizing irregular nanoparticles are complicated and laborious, largely hindering the exploration of structural irregularity in nanoscience. In this study, the authors have combined seed‐mediated growth and Pt(IV)‐induced etching to synthesize two types of unprecedented Au nanoparticles, bitten nanospheres and nanodecahedrons, with size control. Each nanoparticle has an irregular cavity on it. They exhibit distinct single‐particle chiroptical responses. Perfect Au nanospheres and nanorods without any cavity do not show optical chirality, which demonstrates that the geometrical structure of the bitten opening plays a decisive role in the generation of chiroptical responses.

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Section: Resultsmentioning

confidence: 99%

“…The formation of a single cavity is because the Au atoms exposed at the freshly etched site are unstable and prefer to be oxidized. [ 38,39 ]…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Bitten Gold Nanoparticles with Single‐Particle Chiroptical Responses

Zhang

Chen

Chui

et al. 2023

Small

View full text Add to dashboard Cite

show abstract

“…28–32 Recently, surface vacancies have been considered to further promote the catalyst efficiency. 19,33,34 Since catalytic reactions properly occur at the lower coordination atomic sites, such as edges, corners, and kinky sites, the formation of surface vacancies would inevitably present such active sites. 35–42 For instance, Yu and co-workers reported that the strain- and defect-engineered Ni-MoS 2 monolayer exhibits a superior HER performance by promoting the rate-determining water dissociation step.…”

Section: Introductionmentioning

confidence: 99%