Promotion of the halide effect in the formation of shaped metal nanocrystals via a hybrid cationic, polymeric stabilizer: Octahedra, cubes, and anisotropic growth

Sneed, Brian T.; Golden, M.; Liu, Yejing; Lee, Hiang Kwee; Andoni, Ilektra; Young, Allison P.; McMahon, Greg; Erdman, Natasha; Shibata, Masateru; Ling, Xing Yi; Tsung, Chia Kuang

doi:10.1016/j.susc.2015.12.012

Cited by 15 publications

(18 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Selfassembly is a promising strategy for generating highly ordered nano-and microstructured homo(hetero)structures, which can provide more interfacial contact among components. 12,13 In this study, for the first time the originally inert PANI is converted into a highly active electrocatalyst with good stability for hydrogen evolution by interfacial electronic coupling with properly engineered metal oxides with highly ordered assembly architecture. For example, the as-synthesized WO 3 assemblies@PANI exhibits the lowest overpotential (74 mV) at 10 mA•cm −2 in 0.5M H 2 SO 4 electrolyte.…”

Section: Introductionmentioning

confidence: 99%

“…Many nanowires were bundled together to allow minimization of the total surface energy ( Figure 1I). 13 The rough surface coating on the nanowires is believed to be from PANI. In highresolution transmission electron microscopy images (inset of Figure 1I), the interface between WO 3 and PANI is very distinct: the fringe spacing (0.37 nm) in the core region matches well with WO 3 {100} facets, whereas the outer region corresponds to amorphous PANI.…”

Section: Introductionmentioning

confidence: 99%

“…However, other controllable interfacial electronic coupling to activate the nonmetal atoms between the support and active component remains a great challenge. Self‐assembly is a promising strategy for generating highly ordered nano‐ and microstructured homo(hetero)structures, which can provide more interfacial contact among components …”

Section: Introductionmentioning

confidence: 99%

“…Transmission electron microscopy (TEM) images shows the formation of core/shell structure of the WO 3 assemblies@PANI (Figure I‐K). Many nanowires were bundled together to allow minimization of the total surface energy (Figure I) . The rough surface coating on the nanowires is believed to be from PANI.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Optimizing interfacial electronic coupling with metal oxide to activate inert polyaniline for superior electrocatalytic hydrogen generation

Huang

Song

et al. 2019

Carbon Energy

View full text Add to dashboard Cite

Tuning and optimization of electronic structures and related reaction energetics are critical toward the rational design of efficient electrocatalysts. Herein, experimental and theoretical calculation demonstrate the originally inert N site within polyaniline (PANI) can be activated for hydrogen evolution by proper d-π interfacial electronic coupling with metal oxide. As a result, the assynthesized WO 3 assemblies@PANI via a facile redox-induced assembly and in situ polymerization, exhibits the electrocatalytic production of hydrogen better than other control samples including W 18 O 49 @PANI and most of the reported nobel-metal-free electrocatalysts, with low overpotential of 74 mV at 10 mA·cm −2 and small Tafel slope of 46 mV·dec −1 in 0.5M H 2 SO 4 (comparable to commercial Pt/C). The general efficacy of this methodology is also validated by extension to other metal oxides such as MoO 3 with similar improvements.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimizing interfacial electronic coupling with metal oxide to activate inert polyaniline for superior electrocatalytic hydrogen generation

Huang

Song

et al. 2019

Carbon Energy

View full text Add to dashboard Cite

show abstract

“…The presence of different high index facets can facilitate or, in contrast, decrease the adsorption or the surface reactions that can occur on one surface, but are not possible on the other [42]. However, it is still difficult to decouple fully the functions of halides from stabilizers in the generation of NPs and an exact operation mechanism remains unclear [39,47]. Therefore, the precise selection of perfect conditions and reagents, such as metal precursors, solvents, reducing agents, stabilizes, halides, and other additives, is essential, since they determine the properties of NPs.…”

Section: Introductionmentioning

confidence: 99%

Investigation of electro-oxidation of glucose at gold nanoparticles/carbon composites prepared in the presence of halide ions

Upskuvienė¹,

Šimkūnaitė²,

Vaičiūnienė³

et al. 2020

chemija

View full text Add to dashboard Cite

In this study, the carbon powder supported gold nanoparticles composites (AuNPs/C) were prepared via the chemical reduction method by employing sodium citrate or a complex mixture of glucose and ascorbic acid as reducing agents in the presence of small amounts of different halide ions (Cl–, Br–, I–). The electrocatalytic activity of the synthesized composites was evaluated for the electro-oxidation of glucose in an alkaline medium using cyclic voltammetry, whereas the morphology and composition of composites were characterized using field emission scanning electron microscopy and inductively coupled plasma optical emission spectroscopy. The electrochemical measurements demonstrate the enhanced electrocatalytic performance of the AuNPs/C composites prepared by the help of different reducing agents coupled with halide ions for the electro-oxidation of glucose as compared to that of composites that were synthesized by the use only of the reducing agents barely. The AuNPs/C composites synthesized with the presence of KCl, KBr or KI additive in the reaction mixture generate the increased glucose electro-oxidation current density values; furthermore, the glucose electro-oxidation potential is shifted to more negative values as compared to those obtained on the synthesized composites without halide additive.

show abstract

An Ion‐Engineering Strategy to Design Hollow FeCo/CoFe₂O₄ Microspheres for High‐Performance Microwave Absorption

Liu

Zhao

Pei

et al. 2023

Small

View full text Add to dashboard Cite

Recently, tremendous efforts have been devoted to fabricating hollow micro-/nanostructures with tunable sizes, shapes, and Although assembled hollow architectures have received considerable attention as lightweight functional materials, their uncontrollable self-aggregation and tedious synthetic methods hinder precise construction and modulation. Therefore, this study proposes a bi-ion synergistic regulation strategy to design assembled hollow-shaped cobalt spinel oxide microspheres. Dominated by the coordinationetching effects of F − and the hydrolysis-complex contributions of NH 4 + , the unique construction is formed attributed to the dynamic cycles between metal complexes and precipitates. Meanwhile, their basic structures are perfectly retained after reduction treatment, enabling FeCo/CoFe 2 O 4 bimagnetic system to be obtained. Subsequently, in-depth analyses are conducted. Investigations reveal that multiscale magnetic coupling networks and enriched air-material heterointerfaces contribute to the remarkable magnetic-dielectric behavior, supported by the advanced off-axis electron holography technique. Consequently, the obtained FeCo/CoFe 2 O 4 composites exhibit excellent microwave absorption performances with minimal reflection losses (RL min ) as high as −51.6 dB, an effective absorption bandwidth (EAB) of 4.7 GHz, and a matched thickness of 1.4 mm. Thus, this work provides an informative guide for rationally assembling building blocks into hollow architectures as advanced microwave absorbers through bi-ion and even multi-ion synergistic engineering mechanisms.

show abstract

Promotion of the halide effect in the formation of shaped metal nanocrystals via a hybrid cationic, polymeric stabilizer: Octahedra, cubes, and anisotropic growth

Cited by 15 publications

References 49 publications

Optimizing interfacial electronic coupling with metal oxide to activate inert polyaniline for superior electrocatalytic hydrogen generation

Optimizing interfacial electronic coupling with metal oxide to activate inert polyaniline for superior electrocatalytic hydrogen generation

Investigation of electro-oxidation of glucose at gold nanoparticles/carbon composites prepared in the presence of halide ions

An Ion‐Engineering Strategy to Design Hollow FeCo/CoFe₂O₄ Microspheres for High‐Performance Microwave Absorption

Contact Info

Product

Resources

About

Promotion of the halide effect in the formation of shaped metal nanocrystals via a hybrid cationic, polymeric stabilizer: Octahedra, cubes, and anisotropic growth

Cited by 15 publications

References 49 publications

Optimizing interfacial electronic coupling with metal oxide to activate inert polyaniline for superior electrocatalytic hydrogen generation

Optimizing interfacial electronic coupling with metal oxide to activate inert polyaniline for superior electrocatalytic hydrogen generation

Investigation of electro-oxidation of glucose at gold nanoparticles/carbon composites prepared in the presence of halide ions

An Ion‐Engineering Strategy to Design Hollow FeCo/CoFe2O4 Microspheres for High‐Performance Microwave Absorption

Contact Info

Product

Resources

About

An Ion‐Engineering Strategy to Design Hollow FeCo/CoFe₂O₄ Microspheres for High‐Performance Microwave Absorption