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Indranil, Mondal
나노물질 및 화학반응 연구단
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A combined experimental and theoretical approach revealing a direct mechanism for bifunctional water splitting on doped copper phosphide

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Title
A combined experimental and theoretical approach revealing a direct mechanism for bifunctional water splitting on doped copper phosphide
Author(s)
Indranil Mondal; Arup Mahata; Heeyoung Kim; Ujjwal Pal; Filippo De Angelis; Jeong Young Park
Subject
OXYGEN EVOLUTION CATALYSTS, ; TRANSITION-METAL PHOSPHIDE, ; HYDROGEN EVOLUTION, ; NICKEL PHOSPHIDE, ; NANOWIRE ARRAYS, ; ELECTROCATALYSTS, ; EFFICIENT, ; NANOPARTICLES, ; DESIGN, ; CORE
Publication Date
2020-09
Journal
NANOSCALE, v.12, no.34, pp.17769 - 17779
Publisher
ROYAL SOC CHEMISTRY
Abstract
© The Royal Society of Chemistry. A cost-effective electrocatalyst should have a high dispersion of active atoms and a controllable surface structure to optimize activity. Additionally, bifunctional characteristics give an added benefit for the overall water splitting. Herein, we report the synthesis and fabrication of Fe-doped Cu/Cu3P supported on a flexible carbon cloth (CC) with a hydrophilic surface for efficient bifunctional water electrolysis under alkaline conditions. Surface doping of Fe in the hexagonal Cu3P does not alter the lattice parameters, but it promotes the surface metallicity by stimulating Cu delta+ and Cu-0 sites in Cu3P, resulting in an augmented electroactive surface area. Cu2.75Fe0.25P composition exhibits unprecedented OER activity with a low overpotential of 470 mV at 100 mA cm(-2). Under a two electrode electrolyzer system the oxygen and hydrogen gas was evolved with an unprecedented rate at their respective electrode made of same catalyst. Density functional theory further elucidates the role of the Fe center toward electronic state modulation, which eventually alters the entire adsorption behavior of the reaction intermediates and reduces the overpotential on Fe-doped system over pristine Cu3P
URI
https://pr.ibs.re.kr/handle/8788114/7655
DOI
10.1039/d0nr03414b
ISSN
2040-3364
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > 1. Journal Papers (저널논문)
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