Correction to “Pt-like Hydrogen Evolution Electrocatalysis on PANI/CoP Hybrid Nanowires by Weakening the Shackles of Hydrogen Ions on the Surfaces of Catalysts”

Feng, Jin‐Xian; Tong, Si-Yao; Tong, Yexiang; Li, Gao‐Ren

doi:10.1021/jacs.9b06907

Cited by 4 publications

(2 citation statements)

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“…Meanwhile, H + captured by the -N + -groups has stronger electron affinity that can receive electrons more easily, compared with H + coordinated with water molecules in the hydronium ions [35]. Benefiting from such advantageous features, the single-atom Pt supported on the protonated polyaniline would obtain a decreased energy barrier required for HER through bypassing the process of capturing H + from hydronium ions that usually involves breaking the strong interactions between H + and water molecules.…”

Section: Possible Catalytic Mechanismmentioning

confidence: 99%

“…Previous studies showed that polyaniline with abundant amine groups can efficiently capture H + from hydronium ions through the formation of protonated amine species, which can significantly improve the local concentration of H + [32][33][34]. Furthermore, compared with H + coordinated with water molecules in the hydronium ions, H + captured by the protonated amine groups of polyaniline has stronger electron affinity that can receive electrons more easily and thus promote the electroreduction of H + [35]. Furthermore, it was found that, constructing needle-shaped nanostructures of catalysts can induce a localized electrostatic field that can lead to the accumulation of electrons and increase the surface-adsorbed cation concentration [36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

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Atomically dispersed platinum supported onto nanoneedle-shaped protonated polyaniline for efficient hydrogen production in acidic water electrolysis

Bai

Lai

et al. 2023

Sci. China Mater.

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Developing high-performance single-atom platinum (Pt) catalysts for acidic hydrogen evolution reaction (HER) is of significance. However, their HER kinetics are limited due to the low concentration of hydrogen ions (H + ) near the Pt sites in acidic electrolytes, where hydronium ions are undesirably formed with H + surrounded by water molecules. Here, we seek to improve the HER kinetics by anchoring single-atom Pt catalyst on nanoneedle-shaped protonated polyaniline supports, which can not only capture H + from the hydronium ions but also facilitate the electroreduction of H + by promoting the electron accumulation. As a result, the turnover frequency of single-atom Pt supported on the nanoneedle-shaped protonated polyaniline is appreciably enhanced, compared with that of the single-atom Pt supported on the flat-shaped protonated polyaniline. By combining the X-ray photoelectron spectroscopy, finite-element simulation and electrochemical studies, we find that the enhanced HER activity of single-atom Pt on nanoneedle-shaped protonated polyaniline support may arise from a hydrogen spillover pathway induced by the increased local concentration of H + near the Pt sites.

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Section: Possible Catalytic Mechanismmentioning

confidence: 99%