Asset Details
Do you wish to reserve the book?
Structure evolution at the gate-tunable suspended graphene–water interface
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Structure evolution at the gate-tunable suspended graphene–water interface
Do you wish to request the book?
Structure evolution at the gate-tunable suspended graphene–water interface
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Structure evolution at the gate-tunable suspended graphene–water interface
2023
Overview
Graphitic electrode is commonly used in electrochemical reactions owing to its excellent in-plane conductivity, structural robustness and cost efficiency
1
,
2
. It serves as prime electrocatalyst support as well as a layered intercalation matrix
2
,
3
, with wide applications in energy conversion and storage
1
,
4
. Being the two-dimensional building block of graphite, graphene shares similar chemical properties with graphite
1
,
2
, and its unique physical and chemical properties offer more varieties and tunability for developing state-of-the-art graphitic devices
5
–
7
. Hence it serves as an ideal platform to investigate the microscopic structure and reaction kinetics at the graphitic-electrode interfaces. Unfortunately, graphene is susceptible to various extrinsic factors, such as substrate effect
8
–
10
, causing much confusion and controversy
7
,
8
,
10
,
11
. Hereby we have obtained centimetre-sized substrate-free monolayer graphene suspended on aqueous electrolyte surface with gate tunability. Using sum-frequency spectroscopy, here we show the structural evolution versus the gate voltage at the graphene–water interface. The hydrogen-bond network of water in the Stern layer is barely changed within the water-electrolysis window but undergoes notable change when switching on the electrochemical reactions. The dangling O–H bond protruding at the graphene–water interface disappears at the onset of the hydrogen evolution reaction, signifying a marked structural change on the topmost layer owing to excess intermediate species next to the electrode. The large-size suspended pristine graphene offers a new platform to unravel the microscopic processes at the graphitic-electrode interfaces.
Using centimetre-sized substrate-free monolayer graphene suspended on aqueous electrolyte surface, the structural evolution versus gate voltage at the graphene–water interface is shown, demonstrating minimal influence of extrinsic factors.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
