{"title":"Yttrium- and nitrogen-doped NiCo phosphide nanosheets for high-efficiency water electrolysis","authors":"Guangliang Chen, Huiyang Xiang, Yingchun Guo, Jun Huang, Wei Chen, Zhuoyi Chen, Tongtong Li, Kostya (Ken) Ostrikov","doi":"10.1002/cey2.522","DOIUrl":null,"url":null,"abstract":"<p>Engineering high-performance and low-cost bifunctional catalysts for H<sub>2</sub> (hydrogen evolution reaction [HER]) and O<sub>2</sub> (oxygen evolution reaction [OER]) evolution under industrial electrocatalytic conditions remains challenging. Here, for the first time, we use the stronger electronegativity of a rare-Earth yttrium ion (Y<sup>3+</sup>) to induce in situ NiCo-layered double-hydroxide nanosheets from NiCo foam (NCF) treated by a dielectric barrier discharge plasma NCF (PNCF), and then obtain nitrogen-doped YNiCo phosphide (N-YNiCoP/PNCF) after the phosphating process using radiofrequency plasma in nitrogen. The obtained N-YNiCoP/PNCF has a large specific surface area, rich heterointerfaces, and an optimized electronic structure, inducing high electrocatalytic activity in HER (331 mV vs. 2000 mA cm<sup>−2</sup>) and OER (464 mV vs. 2000 mA cm<sup>−2</sup>) reactions in 1 M KOH electrolyte. X-ray absorption spectroscopy and density functional theory quantum chemistry calculations reveal that the coordination number of CoNi decreased with the incorporation of Y atoms, which induce much shorter bonds of Ni and Co ions and promote long-term stability of N-YNiCoP in HER and OER under the simulated industrial conditions. Meanwhile, the CoN-YP<sub>5</sub> heterointerface formed by plasma N-doping is the active center for overall water splitting. This work expands the applications of rare-Earth elements in engineering bifunctional electrocatalysts and provides a new avenue for designing high-performance transition-metal-based catalysts in the renewable energy field.</p>","PeriodicalId":33706,"journal":{"name":"Carbon Energy","volume":null,"pages":null},"PeriodicalIF":19.5000,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cey2.522","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Carbon Energy","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/cey2.522","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: 0
Abstract
Engineering high-performance and low-cost bifunctional catalysts for H2 (hydrogen evolution reaction [HER]) and O2 (oxygen evolution reaction [OER]) evolution under industrial electrocatalytic conditions remains challenging. Here, for the first time, we use the stronger electronegativity of a rare-Earth yttrium ion (Y3+) to induce in situ NiCo-layered double-hydroxide nanosheets from NiCo foam (NCF) treated by a dielectric barrier discharge plasma NCF (PNCF), and then obtain nitrogen-doped YNiCo phosphide (N-YNiCoP/PNCF) after the phosphating process using radiofrequency plasma in nitrogen. The obtained N-YNiCoP/PNCF has a large specific surface area, rich heterointerfaces, and an optimized electronic structure, inducing high electrocatalytic activity in HER (331 mV vs. 2000 mA cm−2) and OER (464 mV vs. 2000 mA cm−2) reactions in 1 M KOH electrolyte. X-ray absorption spectroscopy and density functional theory quantum chemistry calculations reveal that the coordination number of CoNi decreased with the incorporation of Y atoms, which induce much shorter bonds of Ni and Co ions and promote long-term stability of N-YNiCoP in HER and OER under the simulated industrial conditions. Meanwhile, the CoN-YP5 heterointerface formed by plasma N-doping is the active center for overall water splitting. This work expands the applications of rare-Earth elements in engineering bifunctional electrocatalysts and provides a new avenue for designing high-performance transition-metal-based catalysts in the renewable energy field.
在工业电催化条件下设计高性能、低成本的双功能催化剂用于 H2(氢进化反应 [HER])和 O2(氧进化反应 [OER])的进化仍然具有挑战性。在此,我们首次利用稀土钇离子(Y3+)较强的电负性,从经过介质阻挡放电等离子体镍钴泡沫(NCF)处理的镍钴层状双氢氧化物纳米片中原位诱导出镍钴层状双氢氧化物纳米片,然后在氮气中利用射频等离子体进行磷化处理,得到掺氮的镍钴磷化物(N-YNiCoP/PNCF)。得到的 N-YNiCoP/PNCF 具有较大的比表面积、丰富的异质界面和优化的电子结构,在 1 M KOH 电解液中的 HER(331 mV vs. 2000 mA cm-2)和 OER(464 mV vs. 2000 mA cm-2)反应中具有较高的电催化活性。X 射线吸收光谱和密度泛函理论量子化学计算显示,CoNi 的配位数随着 Y 原子的加入而减少,这使得 Ni 和 Co 离子的键更短,促进了 N-YNiCoP 在模拟工业条件下的 HER 和 OER 中的长期稳定性。同时,等离子体 N 掺杂形成的 CoN-YP5 异质面是整个水分裂的活性中心。这项研究拓展了稀土元素在双功能电催化剂工程中的应用,为在可再生能源领域设计高性能过渡金属催化剂提供了一条新途径。
期刊介绍:
Carbon Energy is an international journal that focuses on cutting-edge energy technology involving carbon utilization and carbon emission control. It provides a platform for researchers to communicate their findings and critical opinions and aims to bring together the communities of advanced material and energy. The journal covers a broad range of energy technologies, including energy storage, photocatalysis, electrocatalysis, photoelectrocatalysis, and thermocatalysis. It covers all forms of energy, from conventional electric and thermal energy to those that catalyze chemical and biological transformations. Additionally, Carbon Energy promotes new technologies for controlling carbon emissions and the green production of carbon materials. The journal welcomes innovative interdisciplinary research with wide impact. It is indexed in various databases, including Advanced Technologies & Aerospace Collection/Database, Biological Science Collection/Database, CAS, DOAJ, Environmental Science Collection/Database, Web of Science and Technology Collection.