Gnanaprakasam Janani, Subramani Surendran, Dae Jun Moon, Poonchi Sivasankaran Ramesh, Joon Young Kim, Yoongu Lim, Krishnan Veeramani, Shivraj Mahadik, Sebastian Cyril Jesudass, Jinuk Choi, Il Goo Kim, Pildo Jung, Heechae Choi, Gibum Kwon, Kyoungsuk Jin, Jung kyu Kim, Yong Il Park, Jaeyeong Heo, Kootak Hong, Young Soo Kang, Uk Sim
{"title":"Ambipolar Nature Accelerates Dual-Functionality on Ni/Ni3N@NC for Simultaneous Hydrogen and Oxygen Evolution in Electrochemical Water Splitting System","authors":"Gnanaprakasam Janani, Subramani Surendran, Dae Jun Moon, Poonchi Sivasankaran Ramesh, Joon Young Kim, Yoongu Lim, Krishnan Veeramani, Shivraj Mahadik, Sebastian Cyril Jesudass, Jinuk Choi, Il Goo Kim, Pildo Jung, Heechae Choi, Gibum Kwon, Kyoungsuk Jin, Jung kyu Kim, Yong Il Park, Jaeyeong Heo, Kootak Hong, Young Soo Kang, Uk Sim","doi":"10.1002/adsu.202400059","DOIUrl":null,"url":null,"abstract":"<p>Metal nitrides with extraordinary electrochemical characteristics established widespread applications in energy devices. Inspired by the recent research on promising heterostructured catalysts, the preparation of a nitride-based heterostructure via a facile approach involving a one-step nitridation process is revisited. An innovative Ni/Ni<sub>3</sub>N is decorated on nitrogen-doped carbon (NC) and evaluated for its dual-functionality as a catalyst in the electrochemical hydrogen evolution reaction (EHER) and the electrochemical oxygen evolution reaction (EOER). In contrast to Ni@NC and pristine NC, Ni/Ni<sub>3</sub>N@NC with the well-constructed NC significantly enhanced its catalytic performance toward EHER and EOER in a water electrolyzer. The water electrolyzer consists of Ni/Ni<sub>3</sub>N@NC as both the anode and cathode achieve a current density of 10 mA cm<sup>−2</sup> with a remarkably low voltage of 1.52 V. The designed catalyst takes full advantage of its heterostructure and ambipolar behavior leading to the presence of active sites for EOER and EHER, as confirmed by in-situ Raman analysis. These results provide important guidance on designing an efficient and cost-effective heterostructured dual-functional catalyst as well as revealing the mechanism at the interface between the surface of an ambipolar catalyst and electrolyte.</p>","PeriodicalId":7294,"journal":{"name":"Advanced Sustainable Systems","volume":"8 11","pages":""},"PeriodicalIF":6.5000,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Sustainable Systems","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/adsu.202400059","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Metal nitrides with extraordinary electrochemical characteristics established widespread applications in energy devices. Inspired by the recent research on promising heterostructured catalysts, the preparation of a nitride-based heterostructure via a facile approach involving a one-step nitridation process is revisited. An innovative Ni/Ni3N is decorated on nitrogen-doped carbon (NC) and evaluated for its dual-functionality as a catalyst in the electrochemical hydrogen evolution reaction (EHER) and the electrochemical oxygen evolution reaction (EOER). In contrast to Ni@NC and pristine NC, Ni/Ni3N@NC with the well-constructed NC significantly enhanced its catalytic performance toward EHER and EOER in a water electrolyzer. The water electrolyzer consists of Ni/Ni3N@NC as both the anode and cathode achieve a current density of 10 mA cm−2 with a remarkably low voltage of 1.52 V. The designed catalyst takes full advantage of its heterostructure and ambipolar behavior leading to the presence of active sites for EOER and EHER, as confirmed by in-situ Raman analysis. These results provide important guidance on designing an efficient and cost-effective heterostructured dual-functional catalyst as well as revealing the mechanism at the interface between the surface of an ambipolar catalyst and electrolyte.
期刊介绍:
Advanced Sustainable Systems, a part of the esteemed Advanced portfolio, serves as an interdisciplinary sustainability science journal. It focuses on impactful research in the advancement of sustainable, efficient, and less wasteful systems and technologies. Aligned with the UN's Sustainable Development Goals, the journal bridges knowledge gaps between fundamental research, implementation, and policy-making. Covering diverse topics such as climate change, food sustainability, environmental science, renewable energy, water, urban development, and socio-economic challenges, it contributes to the understanding and promotion of sustainable systems.