Defect-Induced Pt-Co-Se Coordinated Sites with Highly Asymmetrical Electronic Distribution for Boosting Oxygen-Involving Electrocatalysis

Defect-Induced Pt-Co-Se Coordinated Sites with Highly Asymmetrical Electronic Distribution for Boosting Oxygen-Involving Electrocatalysis

© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Détails bibliographiques
Publié dans:Advanced materials (Deerfield Beach, Fla.). - 1998. - 31(2019), 4 vom: 21. Jan., Seite e1805581
Auteur principal: Zhuang, Linzhou (Auteur)
Autres auteurs: Jia, Yi, Liu, Hongli, Wang, Xin, Hocking, Rosalie K, Liu, Hongwei, Chen, Jun, Ge, Lei, Zhang, Longzhou, Li, Mengran, Dong, Chung-Li, Huang, Yu-Cheng, Shen, Shaohua, Yang, Dongjiang, Zhu, Zhonghua, Yao, Xiangdong
Format: Article en ligne
Langue:English
Publié: 2019
Accès à la collection:Advanced materials (Deerfield Beach, Fla.)
Sujets:Journal Article asymmetrical electronic distribution atomic metal species oxygen evolution selenium vacancies synergetic interaction
Description
Résumé:© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Rational design and synthesis of hetero-coordinated moieties at the atomic scale can significantly raise the performance of the catalyst and obtain mechanistic insight into the oxygen-involving electrocatalysis. Here, a facile plasma-photochemical strategy is applied to construct atomically coordinated Pt-Co-Se moieties in defective CoSe2 (CoSe2- x ) through filling the plasma-created Se vacancies in CoSe2- x with single Pt atomic species (CoSe2- x -Pt) under ultraviolet irradiation. The filling of single Pt can remarkably enhance the oxygen evolution reaction (OER) activity of CoSe2 . Optimal OER specific activity is achieved with a Pt content of 2.25 wt% in CoSe2- x -Pt, exceeding that of CoSe2- x by a factor of 9. CoSe2- x -Pt shows much better OER performance than CoSe2- x filled with single Ni and even Ru atomic species (CoSe2- x -Ni and CoSe2- x -Ru). Noticeably, it is general that Pt is not a good OER catalyst but Ru is; thus the design of active sites for electrocatalysis at an atomic level should follow a different intrinsic mechanism. Mechanism studies unravel that the single Pt can induce much higher electronic distribution asymmetry degree than both single Ni and Ru, and benefit the interaction between the Co sites and adsorbates (OH*, O*, and OOH*) during the OER process, leading to a better OER activity
Description:Date Completed 30.01.2019
Date Revised 30.09.2020
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.201805581