You are cordially invited to attend the Lecture of
Sustainability and Energy Technologies. We are pleased to have Ph.D. Yi-Hsuan Wu from Department of Mechanical and Process Engineering at ETH Zürich (Switzerland) as our speaker. The topic of the
lecture is " Probing Materials
Transformation During Reaction via X-ray Spectroscopy: Importance of Evaluating
Intrinsic Activity of Oxygen
Electrocatalysts ". Further details are as follows:
1.Topic: Probing
Materials Transformation During Reaction via X-ray Spectroscopy: Importance of
Evaluating Intrinsic Activity of
Oxygen Electrocatalysts
2.Speaker: Dr. Yi-Hsuan Wu
3.
Abstract:
Oxygen electrocatalysis sets a cornerstone for electrocatalytic energy conversion techniques such as fuel cells, electrolyzers and metal-air batteries. The oxygen evolution reaction (OER) is the limiting factor in cell efficiency for conventional water electrolyzer and a sustainable corresponding reaction for emerging CO2 electrolysis. Despite enormous number of publications each year, evaluation of intrinsic activity of metal-oxide OER electrocatalysts is relatively rare. Most of reports aim to highlight the claimed “high activity” without deciphering bulk/surface transformation of materials under reaction conditions and understanding the real active sites of studied catalysts. In contrast to heterogeneous thermal catalysis, charge transfer at solid-electrolyte interface and stability of pristine or evolved crystal structure in aqueous environment determine the electrocatalysis itself. Here two showcases will be shared to emphasize the importance of the aforementioned factors: (1) ex-situ X-ray photoelectron spectroscopy and soft X-ray absorption spectroscopy at O K-edge for qualitative analyse the structure-related surface reconstruction in Ruddlesden-Popper lanthanum nickelates and (2) in-situ hard X-ray spectroscopy at Ir LIII-edge to quantify the interatomic structure of hydrous iridium oxide evolved from bimetallic Ir-based nanocrystals. The talk will finish with a brief view of the experience to properly perform lab-scale electrocatalytic studies using conventional three-electrode system and analyze data from-ray spectroscopies.
4.Date: 2024/12/12 (Thu.) 12:00~13:30
5.Venue: Meeting Room of Center for Sustainability and Energy
Technologies. (Engineering Building 10F. If the number of participants is
large, the venue will be shifted to another conference room.)
6.Registration Deadline: 2024/12/11 (Wed.)
Campus Information System iCGU URL: https://www4.is.cgu.edu.tw/act/
Important Notes:
This lecture qualifies for 1.5 hours of training for the teaching quality
seminar. All faculty and staff in attendance are required to be present for the
entire session to honor the speaker. Please ensure to sign in and out
personally. Attendees arriving more than 20 minutes after the start will not be
allowed to sign in. Additionally, failing to sign out will result in the
training hours not being counted.