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543 results on '"Wang, Hsing-Lin"'

19. Tailoring Zirconia Supported Intermetallic Platinum Alloy via Reactive Metal‐Support Interactions for High‐Performing Fuel Cells.

Author

Lin, Zijie, Sathishkumar, Nadaraj, Xia, Yu, Li, Shenzhou, Liu, Xuan, Mao, Jialun, Shi, Hao, Lu, Gang, Wang, Tanyuan, Wang, Hsing‐Lin, Huang, Yunhui, Elbaz, Lior, and Li, Qing

Subjects
PLATINUM alloys, PLATINUM, PROTON exchange membrane fuel cells, PLATINUM nanoparticles, FUEL cells, METALLIC oxides, ZIRCONIUM oxide, OXYGEN reduction, DENSITY functional theory
Abstract

Developing efficient and anti‐corrosive oxygen reduction reaction (ORR) catalysts is of great importance for the applications of proton exchange membrane fuel cells (PEMFCs). Herein, we report a novel approach to prepare metal oxides supported intermetallic Pt alloy nanoparticles (NPs) via the reactive metal‐support interaction (RMSI) as ORR catalysts, using Ni‐doped cubic ZrO2 (Ni/ZrO2) supported L10−PtNi NPs as a proof of concept. Benefiting from the Ni migration during RMSI, the oxygen vacancy concentrations in the support are increased, leading to an electron enrichment of Pt. The optimal L10−PtNi−Ni/ZrO2−RMSI catalyst achieves remarkably low mass activity (MA) loss (17.8 %) after 400,000 accelerated durability test cycles in a half‐cell and exceptional PEMFC performance (MA=0.76 A mgPt−1 at 0.9 V, peak power density=1.52/0.92 W cm−2 in H2−O2/−air, and 18.4 % MA decay after 30,000 cycles), representing the best reported Pt‐based ORR catalysts without carbon supports. Density functional theory (DFT) calculations reveal that L10−PtNi−Ni/ZrO2−RMSI requires a lower energetic barrier for ORR than L10−PtNi−Ni/ZrO2 (direct loading), which is ascribed to a decreased Bader charge transfer between Pt and *OH, and the improved stability of L10−PtNi−Ni/ZrO2−RMSI compared to L10−PtNi−C can be contributed to the increased adhesion energy and Ni vacancy formation energy within the PtNi alloy. [ABSTRACT FROM AUTHOR]

Published
2024
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31. Recent Progress of Low‐Toxicity Poor‐Lead All‐Inorganic Perovskite Solar Cells.

Author

Zhang, Weihai, Liu, Heng, Yan, Furi, Dong, Baichuan, and Wang, Hsing‐Lin

Subjects
PHOTOVOLTAIC power systems, SOLAR cells, HYBRID solar cells, SILICON solar cells, LEAD, PEROVSKITE
Abstract

Organic–inorganic hybrid perovskite solar cells (PSCs) have achieved an impressive certified efficiency of 25.7%, which is comparatively higher than that of commercial silicon solar cells (23.3%), showing great potential toward commercialization. However, the low stability and high toxicity due to the presence of volatile organic components and toxic metal lead in the perovskites pose significant challenges. To obtain robust and low‐toxicity PSCs, substituting organic cations with pure inorganic cations, and partially or fully replacing the toxic Pb with environmentally benign metals, is one of the promising methods. To date, continuous efforts have been made toward the construction of highly performed low‐toxicity inorganic PSCs with astonishing breakthroughs. This review article provides an overview of recent progress in inorganic PSCs in terms of lead‐reduced and lead‐free compositions. The physical properties of poor‐lead all‐inorganic perovskites are discussed to unveil the major challenges in this field. Then, it reports notable achievements for the experimental studies to date to figure out feasible methods for efficient and stable poor‐lead all‐inorganic PSCs. Finally, a discussion of the challenges and prospects for poor‐lead all‐inorganic PSCs in the future is presented. [ABSTRACT FROM AUTHOR]

Published
2024
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32. In‐situ electrochemical reconstruction of CoCO3@FeOOH for boosting high‐current‐density oxygen evolution reaction and freestanding Zn‐air battery.

Author

Jiao, Chuanlai, Xu, Zian, Xia, Yu, Chen, Shaoqing, and Wang, Hsing‐Lin

Subjects
OXYGEN evolution reactions, CARBON fibers, WATER electrolysis, IRON, RAMAN spectroscopy
Abstract

The activity of electrocatalysts in the oxygen evolution reaction (OER) is crucial for the widespread applications of water electrolysis and zinc‐air batteries. Iron‐cobalt‐based catalysts attract considerably interests due to their high intrinsic activity and stability. However, it is still challenging in further promoting the OER efficiency at the high current density (500 mA cm−2) and understanding the real active sites during the OER process. In this work, the composite catalyst, cobalt carbonate (CoCO3) and iron oxyhydroxide (FeOOH), were successfully synthesized on the carbon cloth (CoCO3@FeOOH/CC) by a facile hydrothermal method. Through in‐situ electrochemical activation, the CoFe2O4/CoFeOOH catalyst (R−CoCO3@FeOOH/CC) exhibits significantly improved OER overpotential, 190 and 238 mV at the current density of 50 and 500 mA cm−2. By the in‐situ Raman spectroscopy analysis and microscopy observations, the reconstructed structure CoFe2O4/CoFeOOH was identified. Based on the highly active OER performance of R−CoCO3@FeOOH/CC, it enables the continuous operation of freestanding ZABs at the ultralow charge voltage of 1.74 V in 5 mA cm−2. These findings offer valuable insights for the design and application of high‐performance iron‐cobalt‐based OER catalysts. [ABSTRACT FROM AUTHOR]

Published
2024
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41. High‐Density Atomic Fe–N 4 /C in Tubular, Biomass‐Derived, Nitrogen‐Rich Porous Carbon as Air‐Electrodes for Flexible Zn–Air Batteries

Author

Jiao, Chuanlai, primary, Xu, Zian, additional, Shao, Jingze, additional, Xia, Yu, additional, Tseng, Jochi, additional, Ren, Guangyuan, additional, Zhang, Nianji, additional, Liu, Pengfei, additional, Liu, Chongxuan, additional, Li, Guangshe, additional, Chen, Shi, additional, Chen, Shaoqing, additional, and Wang, Hsing‐Lin, additional

Published
2023
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