第五周碩博專討演講公告(03/17)
2022.03.14
碩博專討演講公告
題目:
Atomic-design and Surface-probing of Selective Two-dimensional Nanomaterials as Artificial Leaves
主講人:林麗瓊 教授
現職:國立臺灣大學 凝態科學研究中心 特聘研究員
內容摘要:
Photocatalytic CO2 reduction reaction (CO2RR) has been hampered by the low photon-to-fuel conversion efficiency and lack of the product selectivity. Atomically thin transition-metal dichalcogenides (TMDCs) have emerged as a new class of non-precious photo-/electro-catalysts with high activity. Usually, a perfect planar layer of TMDC is inactive to catalysis, whereas the artificially generated sulfur vacancy clusters on the basal plane or edges have enhanced CO2 activation with multi-fold or even order-of-magnitude increase in CO2 photoreduction efficiency. Here, four cases in TMDCs and related nanomaterials will be illustrated: (i) single-layer [Nature Comm. 11, 3682 (2020)] to few-layer MoS2 with vacancies controlled by plasma; (ii) reconstructed edge atoms of monolayer WSe2 [Nature Comm. just accepted (2022)]; (iii) the carbon-doped [Nature Comm. 9, 169 (2018)] or carbon-implanted SnS2 nanosheets [Nano Energy 72, 104717 (2020)]; and (iv) direct Z-scheme of ZnS/ZIS heterojunctions [Nano Energy 93, 106809 (2022)].
What are the determining steps for CO2RR? In-situ and operando synchrotron radiation-based spectroscopies, including X-ray absorption [Nature Comm. 11, 4233 (2020)] and X-ray photoelectron spectroscopy, along with nanoscale redox mapping using scanning tunnelling microscope [Nature Comm. 12, 1321 (2021)], Raman and Fourier transform infrared spectroscopies, have enabled scientists to obtain atomic insights into the catalytic reaction mechanisms.
時間:民國111年03月17日 星期四
地點:moodle上觀看線上影片及成功大學成功校區三系館鋼構區(3F)共同教室 A1302演講廳
題目:
Atomic-design and Surface-probing of Selective Two-dimensional Nanomaterials as Artificial Leaves
主講人:林麗瓊 教授
現職:國立臺灣大學 凝態科學研究中心 特聘研究員
內容摘要:
Photocatalytic CO2 reduction reaction (CO2RR) has been hampered by the low photon-to-fuel conversion efficiency and lack of the product selectivity. Atomically thin transition-metal dichalcogenides (TMDCs) have emerged as a new class of non-precious photo-/electro-catalysts with high activity. Usually, a perfect planar layer of TMDC is inactive to catalysis, whereas the artificially generated sulfur vacancy clusters on the basal plane or edges have enhanced CO2 activation with multi-fold or even order-of-magnitude increase in CO2 photoreduction efficiency. Here, four cases in TMDCs and related nanomaterials will be illustrated: (i) single-layer [Nature Comm. 11, 3682 (2020)] to few-layer MoS2 with vacancies controlled by plasma; (ii) reconstructed edge atoms of monolayer WSe2 [Nature Comm. just accepted (2022)]; (iii) the carbon-doped [Nature Comm. 9, 169 (2018)] or carbon-implanted SnS2 nanosheets [Nano Energy 72, 104717 (2020)]; and (iv) direct Z-scheme of ZnS/ZIS heterojunctions [Nano Energy 93, 106809 (2022)].
What are the determining steps for CO2RR? In-situ and operando synchrotron radiation-based spectroscopies, including X-ray absorption [Nature Comm. 11, 4233 (2020)] and X-ray photoelectron spectroscopy, along with nanoscale redox mapping using scanning tunnelling microscope [Nature Comm. 12, 1321 (2021)], Raman and Fourier transform infrared spectroscopies, have enabled scientists to obtain atomic insights into the catalytic reaction mechanisms.
時間:民國111年03月17日 星期四
地點:moodle上觀看線上影片及成功大學成功校區三系館鋼構區(3F)共同教室 A1302演講廳