Prof. Hung's corresponding paper in ACS Catal.
2 Jan 2025
Thu
Prof. Hung published "Poly(triazine imide) Crystals for Efficient CO2 Photoreduction: Surface Pyridine Nitrogen Dominates the Performance" as the corresponding author in Nature Energy
The following is the publication information:
Liu, F.; Deng, J. Su, B.; Peng, K.-S.; Liu, K.;* Lin, X.; Hung, S.-F.,* Chen, X.; Lu, X. F.; Fang, Y.; Zhang, G.; Wang, S.* Poly(triazine imide) Crystals for Efficient CO2 Photoreduction: Surface Pyridine Nitrogen Dominates the Performance. ACS Catal. 2025, 15, 1018-1026.
https://pubs.acs.org/doi/10.1021/acscatal.4c06685?articleRef=test
Abstract:
Polymeric carbon nitrides (PCNs), usually the melon phase, have been extensively applied as photocatalysts for CO2 reduction; however, their performance is still unsatisfactory. The condensed allotrope, namely, poly(triazine imide) (PTI) with extended conjugation and a crystallized structure, indeed holds more favorable compositional and
structural advantages for photocatalytic CO2 reduction but remains to be fully exploited. Herein, hexagonal prism-shaped PTI crystals were synthesized and developed as a high- performance photocatalyst for CO2 reduction. With Co(bpy)32+ as a cocatalyst, the PTI crystals exhibit a CO evolution rate of 44 μmol h−1 (i.e., 1467 μmol g−1 h−1) with 93% selectivity, markedly superior to that of the melon counterpart. Moreover, PTI crystals manifest an apparent quantum efficiency of 12.9% at 365nm, representing the state-of-the-art value by PCN photocatalysts for CO2-to-CO reduction without using noble metals. The surface pyridine N species of PTI are exposed as active sites to dominate CO2 activation and conversion, which, together with the high crystallinity to facilitate charge separation and transport, endows high CO2 reduction efficiency. In situ diffuse reflectance infrared Fourier transform spectroscopy determines the key intermediates during the CO2 reduction reaction and, consequently, constructs the possible reaction mechanism.
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2025 Year-end party
21 Jan 2025
Tue
At the end of the year of Dragon, we went to a Caiyuan Shanghai Restaurant. The advisor prepared a sticking game. Each student strived their own Year-end-bonuses by sticking more points and the luck for the year of Snake. Happy Lunar New Year!!!
Prof. Hung's corresponding paper in ACS Appl. Mater. Interface
4 Feb 2025
Tue
Prof. Hung published "Microenvironment Matters: Copper-Carbon Composites Enable Highly Efficient Carbon Dioxide Reduction Reaction to C2 Products" as the corresponding author in ACS Applied Materials & Interface.
The following is the publication information:
Shen, Y.-J.; Hsu, Y.-H.; Chang, Y.-C.; Ma, J.-J.; Peng, K.-S.; Lu, Y.-R.; Hsu, S.-H.; Hung, S.-F.* Microenvironment Matters: Copper-Carbon Composites Enable Highly Efficient Carbon Dioxide Reduction Reaction to C2 Products. ACS Appl. Mater. Interface 2025, 17, 9378-9390.
https://pubs.acs.org/doi/10.1021/acsami.4c20586
Abstract:
Copper is the catalyst widely used to produce multicarbon products for the carbon dioxide reduction reaction
(CO2RR). The surrounding microenvironment of copper plays a crucial role in determining its catalytic activity and selectivity. In this study, we compare three copper electrocatalysts with different microenvironments: pure metallic copper, a copper metal−organic framework (MOF), and a MOF-derived copper−carbon composite. OperandoX-ray absorption spectroscopy, transmission electron microscopy, and Raman spectroscopy reveal that copper in the
copper−carbon composite remains in a metallic state, encapsulated by a carbon matrix. The composite catalyst achieves a Faradaic efficiency of 75.6% for C2 products, including ethylene and ethanol, at a current density of 500 mA cm−2, with a C2 current density of 377.9 mA cm−2. This performance suppresses pure metallic copper, which reaches an optimal Faradaic efficiency of 64.5% for C2 products at a current density of 300 mA cm−2, with a C2 current density of 193.5 mA cm−2. The copper−carbon composite also significantly overperforms the copper-MOF catalyst, which shows an optimal Faradaic efficiency of 52.0% for C2 products at a current density of 400 mA cm−2, with a C2 current density of 208.0 mA cm−2. These findings highlight the importance of the microenvironment near active copper sites in determining CO2RR efficiency. We hope that our results provide valuable insights for advancing catalyst design in carbon dioxide reduction, contributing to reduced carbon emissions and improved environmental sustainability.
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Congratulate Yung-Hsi, Kang Chi and Jian-Jie on winning the Awards
9 Mar 2025
Fri
We congratulate Yung-Hsi and Kang Chi on winning Excellent Poster Prizes for poster competition in 2025 Chemistry National Meeting. We also congratulate Jian-Jie on winning Honorable Mention in Chao-Ting Chang Inorganic Chemistry.
Additionally, Ming-Hsuan, Ching-Husan, and Yu-Chia won gift vouchers in a drawing. We hope that good fortune continues throughout the entire year.
