Surface-Reconstructed CdNNi3 Antiperovskite Electrocatalyst: Unlocking Ampere-Level Current Density for Hydrogen Evolution.

IF 15.8 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY ACS Nano Pub Date : 2024-11-19 Epub Date: 2024-11-07 DOI:10.1021/acsnano.4c10486
Jiaxi Zhang, Yuanhua Tu, Longhai Zhang, Shunyi He, Chengzhi Zhong, Jun Ke, Liming Wang, Ce Cui, Huiyu Song, Li Du, Zhiming Cui
{"title":"Surface-Reconstructed CdNNi<sub>3</sub> Antiperovskite Electrocatalyst: Unlocking Ampere-Level Current Density for Hydrogen Evolution.","authors":"Jiaxi Zhang, Yuanhua Tu, Longhai Zhang, Shunyi He, Chengzhi Zhong, Jun Ke, Liming Wang, Ce Cui, Huiyu Song, Li Du, Zhiming Cui","doi":"10.1021/acsnano.4c10486","DOIUrl":null,"url":null,"abstract":"<p><p>Developing conductive electrocatalysts is crucial for decreasing the ohmic loss induced by electric resistance of the catalyst layer in the large-current-density hydrogen evolution reaction (HER), which has been overlooked previously. In this study, we screen a highly conductive antiperovskite CdNNi<sub>3</sub> with negligible ohmic loss, as a highly active and durable HER electrocatalyst capable of unlocking ampere-scale current densities. CdNNi<sub>3</sub> exhibits an impressive activity (an overpotential of 235 mV) at 1 A cm<sup>-2</sup> and maintains its performance steadily at an ampere-scale current density (at 1 A cm<sup>-2</sup> over 400 h). Besides, the CdNNi<sub>3</sub>-enabled anion-exchange membrane water electrolyzer outperforms that of the benchmark Pt/C, evidenced by a reduced cell voltage of 160 mV at 1 A cm<sup>-2</sup>, and presents a favorable stability at 1 A cm<sup>-2</sup>. Importantly, this study experimentally discovers the dynamic surface reconstruction phenomena of antiperovskite nitrides during alkaline HER. Theoretical analysis suggests that the presence of Cd in the reconstructed surface effectively adjusts the local electronic configuration of active sites, which promotes the adsorption of OH and reduces the binding strength to H, thereby facilitating the water dissociation step and reducing the energy barrier of the potential-determining step in the HER process.</p>","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":" ","pages":"32077-32087"},"PeriodicalIF":15.8000,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Nano","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1021/acsnano.4c10486","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/11/7 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

Abstract

Developing conductive electrocatalysts is crucial for decreasing the ohmic loss induced by electric resistance of the catalyst layer in the large-current-density hydrogen evolution reaction (HER), which has been overlooked previously. In this study, we screen a highly conductive antiperovskite CdNNi3 with negligible ohmic loss, as a highly active and durable HER electrocatalyst capable of unlocking ampere-scale current densities. CdNNi3 exhibits an impressive activity (an overpotential of 235 mV) at 1 A cm-2 and maintains its performance steadily at an ampere-scale current density (at 1 A cm-2 over 400 h). Besides, the CdNNi3-enabled anion-exchange membrane water electrolyzer outperforms that of the benchmark Pt/C, evidenced by a reduced cell voltage of 160 mV at 1 A cm-2, and presents a favorable stability at 1 A cm-2. Importantly, this study experimentally discovers the dynamic surface reconstruction phenomena of antiperovskite nitrides during alkaline HER. Theoretical analysis suggests that the presence of Cd in the reconstructed surface effectively adjusts the local electronic configuration of active sites, which promotes the adsorption of OH and reduces the binding strength to H, thereby facilitating the water dissociation step and reducing the energy barrier of the potential-determining step in the HER process.

Abstract Image

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
表面重构的 CdNNi3 反iperovskite 电催化剂:释放氢气进化的安培级电流密度。
开发导电电催化剂对于降低大电流密度氢气进化(HER)反应中催化剂层电阻引起的欧姆损耗至关重要,而这一点之前一直被忽视。在本研究中,我们筛选出了一种可忽略欧姆损耗的高导电性反钝角石 CdNNi3,将其作为一种高活性、高持久性的 HER 电催化剂,能够释放出安培级的电流密度。CdNNi3 在 1 A cm-2 时表现出惊人的活性(过电位为 235 mV),并在安培级电流密度下(1 A cm-2 时超过 400 小时)保持稳定的性能。此外,CdNNi3 阴离子交换膜水电解槽的性能优于基准的 Pt/C 电解槽,在 1 A cm-2 时电池电压降低了 160 mV,并在 1 A cm-2 时表现出良好的稳定性。重要的是,这项研究通过实验发现了反沸石氮化物在碱性 HER 过程中的动态表面重构现象。理论分析表明,重构表面中镉的存在有效地调整了活性位点的局部电子构型,促进了 OH 的吸附,降低了与 H 的结合强度,从而促进了水的解离步骤,降低了 HER 过程中电位决定步骤的能量势垒。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
ACS Nano
ACS Nano 工程技术-材料科学:综合
CiteScore
26.00
自引率
4.10%
发文量
1627
审稿时长
1.7 months
期刊介绍: ACS Nano, published monthly, serves as an international forum for comprehensive articles on nanoscience and nanotechnology research at the intersections of chemistry, biology, materials science, physics, and engineering. The journal fosters communication among scientists in these communities, facilitating collaboration, new research opportunities, and advancements through discoveries. ACS Nano covers synthesis, assembly, characterization, theory, and simulation of nanostructures, nanobiotechnology, nanofabrication, methods and tools for nanoscience and nanotechnology, and self- and directed-assembly. Alongside original research articles, it offers thorough reviews, perspectives on cutting-edge research, and discussions envisioning the future of nanoscience and nanotechnology.
期刊最新文献
Distinct Inflammatory Programs Underlie the Intramuscular Lipid Nanoparticle Response Spontaneous Lifting and Self-Cleaning of Gas Hydrate Crystals Design Considerations and Fabrication Protocols of High-Performance Intrinsically Stretchable Transistors and Integrated Circuits Issue Editorial Masthead Issue Publication Information
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1