アイオー

About Overview Organization & Management Strategy Open Positions Movie Library Access Research Structure Researchers & Laboratories Research Areas Three Advanced Target Projects Collaboration Achievements Press Releases Media & Award AIMResearch Publications Topics News Seminars & Symposium International Satellites International Partner Institutions Inter-Faculty Exchange Agreements Researcher Exchange Programs Support Support Systems For International Researchers (IAC) For Visitors Researchers for Visitors for Researchers for Enterprise Access AIMR Fund Japanese Press Releases New Strategy Improves Perovskites’ Oxygen Reduction Performance in Hydrogen Fuel Cell 12/15/2023 A research group has reported on a new method to enhance the electrochemical surface area (ECSA) in a calcium-doped perovskite, La0.6Ca0.4MnO3 (LCMO64), thereby overcoming a common bottleneck in the application of perovskite oxides as electrocatalysts in hydrogen fuel cells. Details of the findings were reported in the journal Advanced Materials on November 29, 2023. Perovskite oxides exhibit interesting and diverse properties, making them valuable in various technological applications. Their high intrinsic activities also position them as a promising alternative to noble metal catalysts for efficiently catalyzing the oxygen reduction reaction (ORR). However, their application is still hampered by their poor electrical conductivity and low specific surface area. “Our electrochemically induced calcium-leaching process greatly increased ECSA in LCMO64,” points out Hao Li, Associate Professor at Tohoku University's Advanced Institute for Materials Research (WPI-AIMR) and corresponding author of the paper. “The activated, calcium-deficient LCMO64 demonstrated an ECSA approximately 33.84% higher than that of unactivated materials, showcasing superior electrocatalytic ORR performance—surpassing the benchmark commercial Pt/C catalyst in an alkaline solution.” Evidence of calcium leaching during ORR, leading to the high surface area of the LCMO64. ©Hao Li et al. To test the benchmarks of the material, Li and his colleagues conducted theoretical analysis along with electrochemical surface state probing and pH-dependent microkinetic modeling. The results suggested that this catalyst reaches the Sabatier optimum of alkaline ORR. The electrochemical performance. ©Hao Li et al. This research marks the first time a strategy involving calcium (Ca) doping has been employed to overcome challenges associated with low conductivity and surface area in perovskite oxides. The unique phenomenon of Ca leaching observed under ORR conditions results in a higher surface roughness, significantly expanding the available surface area for ORR and thereby boosting the catalyst's performance. “Finding low-cost and effective electrocatalysts for the ORR in hydrogen fuel cells has been a significant challenge,” adds Li. “Our work not only addresses this challenge but also offers a novel strategy for enhancing the electrocatalytic performance of perovskite oxides. This breakthrough has far-reaching implications for the widespread adoption of hydrogen fuel cell technology.” State-of-the-art theoretical analyses of ORR activities on the materials. ©Hao Li et al. Publication Details Title: Cation-Deficient Perovskites Greatly Enhance the Electrocatalytic Activity for Oxygen Reduction Reaction Authors: Qun Li, Di Zhang, Jiabin Wu*, Simin Dai, Heng Liu, Min Lu, Renwen Cui, Wenxi Liang, Dingsheng Wang, Pinxian Xi*, Meilin Liu, Hao Li*, Liang Huang* Journal: Advanced Materials DOI: 10.1002/adma.202309266 Contact Hao LiAdvanced Institute for Materials Research (WPI-AIMR), Tohoku University E-mail: li.hao.b8&＃64;tohoku.ac.jp Webstie: Hao Li Laboratory Tweet Achievements Press Releases 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 Media & Award 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 AIMResearch About AIMResearch Research Highlights 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 In the Spotlight 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 Email Alert Sign up Publications Headlines 05/22/2024 Machine Learning Accelerates Discovery o... 05/16/2024 New Data-Driven Model Rapidly Predicts D... 05/15/2024 Researchers Unlock Vital Insights into M... Home Achievements Press Releases 2023 New Strategy Improves Perovskites’ Oxygen Reduction Performance in Hydrogen Fuel Cell TOHOKU UNIVERSITY World Premier International Research Center Initiative For AIMR Members Link Site map Copyright © 2020 Tohoku University. All Rights Reserved.