BROWSE

Related Scientist

CINAP's photo.

CINAP
나노구조물리 연구단
more info

ITEM VIEW & DOWNLOAD

Boosting Electrocatalytic HER Activity of 3D Interconnected CoSP via Metal Doping: Active and Stable Electrocatalysts for pH-Universal Hydrogen Generation

Cited 0 time in webofscience Cited 0 time in scopus
12 Viewed 0 Downloaded
Title
Boosting Electrocatalytic HER Activity of 3D Interconnected CoSP via Metal Doping: Active and Stable Electrocatalysts for pH-Universal Hydrogen Generation
Author(s)
Viet Q. Bui; Ashwani Kumar; Huong T. D. Bui; Jinsun Lee; Yosep Hwang; Hung M. Le; Yoshiyuki Kawazoe; Hyoyoung Lee
Publication Date
2020-11
Journal
CHEMISTRY OF MATERIALS, v.32, no.22, pp.9591 - 9601
Publisher
AMER CHEMICAL SOC
Abstract
© 2020 American Chemical Society. All rights reserved.Recently, many research studies have been focused on anion or cation substitution into the lattice of pyrite-type cobalt disulfide (CoS2) for enhancing the hydrogen evolution reaction (HER) performance. Nonetheless, finding the correct pair of anion-cation dual substitution with added synergistic effect for boosting pH-universal HER activity remains an ongoing challenge. Additionally, a generalized activity descriptor and the HER mechanism in alkaline media remain elusive. Herein, to elucidate the HER mechanism and obtain the suitable anion-cation pair, we investigated the codoping of metal cations (Ti/V/Cr/Mn/Fe) and phosphorus anions into the CoS2 moiety. Our theoretical prediction revealed that Ti and P codoping into CoS2 exhibits superior HER performance at both pH 0 and 14, which is ascribed to the weak hydrogen binding energy in acid and fast water dissociation kinetics in alkaline media, thereby promoting HER. Remarkably, a follow-up experiment confirmed that Ti-CoSP showed astonishing HER activity inducing low overpotentials of 44 and 132 mV at -10 mA cm-2 in acidic and alkaline media, respectively, with superior stability for 40 h
URI
https://pr.ibs.re.kr/handle/8788114/7545
DOI
10.1021/acs.chemmater.0c03052
ISSN
0897-4756
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
There are no files associated with this item.

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse