On-Chip Investigation of Electrocatalytic Oxygen Reduction Reaction of 2D Materials

Junlei Qi; Wenbin Wang; Yihan Li; Yamei Sun; Zongxiao Wu; Kai Bao; Lingzhi Wang; Ruquan Ye; Mengning Ding; Qiyuan He

doi:10.1002/smll.202204010

On-Chip Investigation of Electrocatalytic Oxygen Reduction Reaction of 2D Materials

Junlei Qi (Co-first Author)
, Wenbin Wang (Co-first Author)
, Yihan Li
, Yamei Sun
, Zongxiao Wu
, Kai Bao
, Lingzhi Wang
, Ruquan Ye
, Mengning Ding^*
, Qiyuan He^*

^*Corresponding author for this work

Department of Materials Science and Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

16 Citations (Scopus)

77 Downloads (CityUHK Scholars)

Abstract

The on-chip electrocatalytic microdevice (OCEM) is an emerging platform specialized in the electrochemical investigation of single-entity nanomaterials, which is ideal for probing the intrinsic catalytic properties, optimizing performance, and exploring exotic mechanisms. However, the current catalytic applications of OCEMs are almost exclusively in electrocatalytic hydrogen/oxygen evolution reactions with minimized influence from the mass transfer. Here, an OCEM platform specially tailored to investigate the electrocatalytic oxygen reduction reaction (ORR) at a microscopic level by introducing electrolyte convection through a microfluidic flow cell is reported. The setup is established on gold microelectrodes and later successfully applied to investigate how Ar-plasma treatment affects the ORR activities of 2H MoS₂. This study finds that Ar-plasma treatment significantly enhances the ORR performance of MoS₂ nanosheets owing to the introduction of surface defects. This study paves the way for highly efficient microscopic investigation of diffusion-controlled electrocatalytic reactions.

Original language	English
Article number	2204010
Journal	Small
Volume	18
Issue number	47
Online published	17 Oct 2022
DOIs	https://doi.org/10.1002/smll.202204010
Publication status	Published - 24 Nov 2022

Funding

J.Q. and W.W. contributed equally to this work. Q.H. thanks the support from the Grants (Project Nos. 9229079, 9610482, 7005468) from City University of Hong Kong and Early Career Scheme Project 21302821 from Research Grants Council. M. D. acknowledged the support by the Natural Science Foundation of China (22172075 and 92156024), the Fundamental Research Funds for the Central Universities in China (0210/14380174 and 14380273), and Beijing National Laboratory for Molecular Sciences (BNLMS202107). R.Y. acknowledges the funding support from Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 21905240).

Research Keywords

2D materials
microelectrodes
microfluidics
on-chip electrochemistry
oxygen reduction reaction

Publisher's Copyright Statement

COPYRIGHT TERMS OF DEPOSITED POSTPRINT FILE: This is the peer reviewed version of the following article: Qi, J., Wang, W., Li, Y., Sun, Y., Wu, Z., Bao, K., Wang, L., Ye, R., Ding, M., & He, Q. (2022). On-Chip Investigation of Electrocatalytic Oxygen Reduction Reaction of 2D Materials. Small, 18(47), [2204010], which has been published in final form at https://doi.org/10.1002/smll.202204010.
This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

RGC Funding Information

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title = "On-Chip Investigation of Electrocatalytic Oxygen Reduction Reaction of 2D Materials",

abstract = "The on-chip electrocatalytic microdevice (OCEM) is an emerging platform specialized in the electrochemical investigation of single-entity nanomaterials, which is ideal for probing the intrinsic catalytic properties, optimizing performance, and exploring exotic mechanisms. However, the current catalytic applications of OCEMs are almost exclusively in electrocatalytic hydrogen/oxygen evolution reactions with minimized influence from the mass transfer. Here, an OCEM platform specially tailored to investigate the electrocatalytic oxygen reduction reaction (ORR) at a microscopic level by introducing electrolyte convection through a microfluidic flow cell is reported. The setup is established on gold microelectrodes and later successfully applied to investigate how Ar-plasma treatment affects the ORR activities of 2H MoS2. This study finds that Ar-plasma treatment significantly enhances the ORR performance of MoS2 nanosheets owing to the introduction of surface defects. This study paves the way for highly efficient microscopic investigation of diffusion-controlled electrocatalytic reactions.",

keywords = "2D materials, microelectrodes, microfluidics, on-chip electrochemistry, oxygen reduction reaction",

author = "Junlei Qi and Wenbin Wang and Yihan Li and Yamei Sun and Zongxiao Wu and Kai Bao and Lingzhi Wang and Ruquan Ye and Mengning Ding and Qiyuan He",

year = "2022",

month = nov,

day = "24",

doi = "10.1002/smll.202204010",

language = "English",

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AU - Qi, Junlei

AU - Wang, Wenbin

AU - Li, Yihan

AU - Sun, Yamei

AU - Wu, Zongxiao

AU - Bao, Kai

AU - Wang, Lingzhi

AU - Ye, Ruquan

AU - Ding, Mengning

AU - He, Qiyuan

PY - 2022/11/24

Y1 - 2022/11/24

N2 - The on-chip electrocatalytic microdevice (OCEM) is an emerging platform specialized in the electrochemical investigation of single-entity nanomaterials, which is ideal for probing the intrinsic catalytic properties, optimizing performance, and exploring exotic mechanisms. However, the current catalytic applications of OCEMs are almost exclusively in electrocatalytic hydrogen/oxygen evolution reactions with minimized influence from the mass transfer. Here, an OCEM platform specially tailored to investigate the electrocatalytic oxygen reduction reaction (ORR) at a microscopic level by introducing electrolyte convection through a microfluidic flow cell is reported. The setup is established on gold microelectrodes and later successfully applied to investigate how Ar-plasma treatment affects the ORR activities of 2H MoS2. This study finds that Ar-plasma treatment significantly enhances the ORR performance of MoS2 nanosheets owing to the introduction of surface defects. This study paves the way for highly efficient microscopic investigation of diffusion-controlled electrocatalytic reactions.

AB - The on-chip electrocatalytic microdevice (OCEM) is an emerging platform specialized in the electrochemical investigation of single-entity nanomaterials, which is ideal for probing the intrinsic catalytic properties, optimizing performance, and exploring exotic mechanisms. However, the current catalytic applications of OCEMs are almost exclusively in electrocatalytic hydrogen/oxygen evolution reactions with minimized influence from the mass transfer. Here, an OCEM platform specially tailored to investigate the electrocatalytic oxygen reduction reaction (ORR) at a microscopic level by introducing electrolyte convection through a microfluidic flow cell is reported. The setup is established on gold microelectrodes and later successfully applied to investigate how Ar-plasma treatment affects the ORR activities of 2H MoS2. This study finds that Ar-plasma treatment significantly enhances the ORR performance of MoS2 nanosheets owing to the introduction of surface defects. This study paves the way for highly efficient microscopic investigation of diffusion-controlled electrocatalytic reactions.

KW - 2D materials

KW - microelectrodes

KW - microfluidics

KW - on-chip electrochemistry

KW - oxygen reduction reaction

UR - https://www.scopus.com/pages/publications/85139955967

UR - https://www.scopus.com/pages/publications/85139955967#tab=impact

U2 - 10.1002/smll.202204010

DO - 10.1002/smll.202204010

M3 - RGC 21 - Publication in refereed journal

SN - 1613-6810

VL - 18

JO - Small

JF - Small

IS - 47

M1 - 2204010

ER -

On-Chip Investigation of Electrocatalytic Oxygen Reduction Reaction of 2D Materials

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DON_RMG: On-chip Electrochemical Approach towards CO2 Reduction Reaction - RMGS

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On-Chip Investigation of Electrocatalytic Oxygen Reduction Reaction of 2D Materials

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Research Keywords

Publisher's Copyright Statement

RGC Funding Information

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DON_RMG: On-chip Electrochemical Approach towards CO2 Reduction Reaction - RMGS

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