2024
DOI: 10.1002/anie.202315633
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Grain Boundary Tailors the Local Chemical Environment on Iridium Surface for Alkaline Electrocatalytic Hydrogen Evolution

Liqiang Hou,
Zijian Li,
Haeseong Jang
et al.

Abstract: Even though grain boundaries (GBs) have been previously employed to increase the number of active catalytic sites or tune the binding energies of reaction intermediates for promoting electrocatalytic reactions, the effect of GBs on the tailoring of the local chemical environment on the catalyst surface has not been clarified thus far. In this study, a GBs‐enriched iridium (GB‐Ir) was synthesized and examined for the alkaline hydrogen evolution reaction (HER). Operando Raman spectroscopy and density functional … Show more

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Cited by 11 publications
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“…33 Such a type of interlayer confinement was reported for designing and preparing other nanostructures, such as carbon nanorings, 24 Ir nanodots, 25 and Pt single atoms. 26 The LDH precursor-involved interlayer confinement could thus be universal for developing electrocatalytic water splitting, and also as effective as other types of synthesis strategies, such as metal–organic-framework encapsulation, 34 the grain boundary effect, 35 hierarchical pore confinement, 36 metal–support interaction, 37,38 and lattice strain. 39 In addition, pores were observed on the rGO support (Fig.…”
Section: Resultsmentioning
confidence: 99%
“…33 Such a type of interlayer confinement was reported for designing and preparing other nanostructures, such as carbon nanorings, 24 Ir nanodots, 25 and Pt single atoms. 26 The LDH precursor-involved interlayer confinement could thus be universal for developing electrocatalytic water splitting, and also as effective as other types of synthesis strategies, such as metal–organic-framework encapsulation, 34 the grain boundary effect, 35 hierarchical pore confinement, 36 metal–support interaction, 37,38 and lattice strain. 39 In addition, pores were observed on the rGO support (Fig.…”
Section: Resultsmentioning
confidence: 99%