CaltechAUTHORS
  A Caltech Library Service

Photochemically deposited Ir-doped NiCo oxyhydroxide nanosheets provide highly efficient stable electrocatalysts for the oxygen evolution reaction

Huang, Liang-ai and Shin, Hyeyoung and Goddard, William A., III and Wang, Jianming (2020) Photochemically deposited Ir-doped NiCo oxyhydroxide nanosheets provide highly efficient stable electrocatalysts for the oxygen evolution reaction. Nano Energy, 75 . Art. No. 104885. ISSN 2211-2855. https://resolver.caltech.edu/CaltechAUTHORS:20200518-090000262

[img] PDF - Accepted Version
See Usage Policy.

5Mb
[img] MS Word - Supplemental Material
See Usage Policy.

5Mb

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20200518-090000262

Abstract

To achieve practical production of fuel from water, it is essential to develop efficient and durable electrocatalysts for the oxygen evolution reaction (OER). We report here that doping NiCoOOH nanosheets with 8% Ir leads to a low overpotential of only 260 mV for 50 mA/cm², far better than previous OER catalysts. We synthesized this catalyst using a novel photochemical deposition method that leads to a uniform distribution of dopant, large catalytic active area, high interfacial charge transfer efficiency, good adhesion between catalyst and matrix, and long lifetime. Moreover, these nanosheets show significant stable performance for 70 h in alkaline media. Our density functional theory calculations show that Ir and Co both play essential bifunctional roles in stabilizing the key O radical intermediate on Ir and promoting the O–O bond coupling on Co, which are optimum for the 8% Ir.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.nanoen.2020.104885DOIArticle
ORCID:
AuthorORCID
Shin, Hyeyoung0000-0001-6694-7895
Goddard, William A., III0000-0003-0097-5716
Additional Information:© 2020 Published by Elsevier Ltd. Received 16 February 2020, Revised 25 March 2020, Accepted 23 April 2020, Available online 16 May 2020. The Zhejiang University part of this research was supported by the National Natural Science Foundation of China (No. 21373182) and the Zhejiang Provincial Natural Science Foundation of China (LY17B030004). The research in Korea was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1C1C1008458). The Caltech portion of the work was supported by the the US National Science Founation (CBET-1805022, Bob McCabe program manager). The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Funders:
Funding AgencyGrant Number
National Natural Science Foundation of China21373182
Natural Science Foundation of Zhejiang ProvinceLY17B030004
National Research Foundation of KoreaUNSPECIFIED
Ministry of Science, ICT and Future Planning (Korea)2020R1C1C1008458
NSFCBET-1805022
Subject Keywords:Oxygen evolution reaction; NiOOH Oxyhydroxide; Density functional theory; Photodeposition; Reaction mechanism
Other Numbering System:
Other Numbering System NameOther Numbering System ID
WAG1385
Record Number:CaltechAUTHORS:20200518-090000262
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200518-090000262
Official Citation:Liang-ai Huang, Hyeyoung Shin, William A. Goddard, Jianming Wang, Photochemically deposited Ir-doped NiCo oxyhydroxide nanosheets provide highly efficient and stable electrocatalysts for the oxygen evolution reaction, Nano Energy, Volume 75, 2020, 104885, ISSN 2211-2855, https://doi.org/10.1016/j.nanoen.2020.104885. (http://www.sciencedirect.com/science/article/pii/S2211285520304420)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103264
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:18 May 2020 16:15
Last Modified:11 Jul 2020 10:36

Repository Staff Only: item control page