Free-standing trimodal porous NiZn intermetallic and Ni heterojunction as highly efficient hydrogen evolution electrocatalyst in the alkaline electrolyte

IF 16.8 1区 材料科学 Q1 CHEMISTRY, PHYSICAL
Qiuxia Zhou , Qin Hao , Yaxin Li , Jinghua Yu , Caixia Xu , Hong Liu , Shishen Yan
{"title":"Free-standing trimodal porous NiZn intermetallic and Ni heterojunction as highly efficient hydrogen evolution electrocatalyst in the alkaline electrolyte","authors":"Qiuxia Zhou ,&nbsp;Qin Hao ,&nbsp;Yaxin Li ,&nbsp;Jinghua Yu ,&nbsp;Caixia Xu ,&nbsp;Hong Liu ,&nbsp;Shishen Yan","doi":"10.1016/j.nanoen.2021.106402","DOIUrl":null,"url":null,"abstract":"<div><p><span>Intermetallics<span> have attracted considerable research interests in a variety of electrocatalysis reactions due to their specific activity, selectivity, and stability arising from more severe alternation of electronic structure than substitutional alloys. Herein, we report one free-standing trimodal porous β</span></span><sub>1</sub><span>-NiZn intermetallic and Ni heterostructure<span> on Ni foam (TMP NiZn-Ni/NF) for hydrogen evolution reaction<span> (HER) via electrochemical water-alkali splitting through one convenient and scalable dealloying strategy. Benefitting from high density reactive sites and fluent mass transfer as a result of trimodal porous architecture and strong electronic modulation from NiZn intermetallic, TMP NiZn-Ni/NF primely overcomes the sluggish hydrogen evolving kinetics with superior catalytic performances comparable to Pt/C and many other reported similar electrocatalysts. TMP NiZn-Ni/NF only required the low overpotential of 233 mV at high rate of 600 mA cm</span></span></span><sup>−2</sup> with the small Tafel slope at 47.3 mV dec<sup>−1</sup> in 1.0 M KOH solution. TMP NiZn-Ni/NF also exhibits exceptional catalytic durability toward HER with almost no current loss under the overpotential of 100 mV for 50 h. Theoretical calculations reveal that β<sub>1</sub><span>-NiZn intermetallic itself has low Gibbs free energy for H adsorption (ΔG</span><sub>H*</sub>), while it can also greatly decrease the ΔG<sub>H*</sub> of heterojuncted Ni. This work presents one powerful and scalable protocol to screen self-supporting nonprecious intermetallic nanocatalysts with high density active sites and outstanding catalytic efficiency.</p></div>","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":null,"pages":null},"PeriodicalIF":16.8000,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.nanoen.2021.106402","citationCount":"37","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano Energy","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2211285521006571","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 37

Abstract

Intermetallics have attracted considerable research interests in a variety of electrocatalysis reactions due to their specific activity, selectivity, and stability arising from more severe alternation of electronic structure than substitutional alloys. Herein, we report one free-standing trimodal porous β1-NiZn intermetallic and Ni heterostructure on Ni foam (TMP NiZn-Ni/NF) for hydrogen evolution reaction (HER) via electrochemical water-alkali splitting through one convenient and scalable dealloying strategy. Benefitting from high density reactive sites and fluent mass transfer as a result of trimodal porous architecture and strong electronic modulation from NiZn intermetallic, TMP NiZn-Ni/NF primely overcomes the sluggish hydrogen evolving kinetics with superior catalytic performances comparable to Pt/C and many other reported similar electrocatalysts. TMP NiZn-Ni/NF only required the low overpotential of 233 mV at high rate of 600 mA cm−2 with the small Tafel slope at 47.3 mV dec−1 in 1.0 M KOH solution. TMP NiZn-Ni/NF also exhibits exceptional catalytic durability toward HER with almost no current loss under the overpotential of 100 mV for 50 h. Theoretical calculations reveal that β1-NiZn intermetallic itself has low Gibbs free energy for H adsorption (ΔGH*), while it can also greatly decrease the ΔGH* of heterojuncted Ni. This work presents one powerful and scalable protocol to screen self-supporting nonprecious intermetallic nanocatalysts with high density active sites and outstanding catalytic efficiency.

独立三模态多孔NiZn金属间和Ni异质结在碱性电解液中作为高效析氢电催化剂
金属间化合物由于其比取代合金更剧烈的电子结构变化所产生的特定活性、选择性和稳定性,在各种电催化反应中引起了相当大的研究兴趣。在此,我们报道了一个独立的三模态多孔β1-NiZn金属间和Ni异质结构在Ni泡沫上(TMP NiZn-Ni/NF),通过一种方便和可扩展的合金化策略,通过电化学水碱分裂进行析氢反应(HER)。由于三模态多孔结构和NiZn金属间化合物的强电子调制,TMP NiZn- ni /NF具有高密度的反应位点和流畅的传质,克服了缓慢的析氢动力学,具有与Pt/C和许多其他类似电催化剂相当的优越催化性能。在1.0 M KOH溶液中,在600 mA cm−2的高速率下,TMP NiZn-Ni/NF只需要233 mV的低过电位,在47.3 mV dec−1时,Tafel斜率很小。TMP NiZn-Ni/NF对HER的催化耐久性也非常好,在100 mV过电位作用50 h时几乎没有电流损失。理论计算表明,β1-NiZn金属间化合物本身对h的吸附具有较低的吉布斯自由能(ΔGH*),同时也可以大大降低异质结Ni的ΔGH*。这项工作提出了一种强大的、可扩展的方案来筛选具有高密度活性位点和卓越催化效率的自支撑非贵重金属间纳米催化剂。
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 求助全文
来源期刊
Nano Energy
Nano Energy CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
30.30
自引率
7.40%
发文量
1207
审稿时长
23 days
期刊介绍: Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem. Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.
×
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
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
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 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信