文献类型：期刊文献

中文题名：富含氧空位的NiFe氢氧化物衍生的具有超疏气纳米阵列形貌的磷化物及其全解水性能

英文题名：Oxygen vacancy-rich nickel-iron hydroxides-derived phosphide with superaerophobic nanoarray morphology for robust overall water splitting

作者：王珂宇[1];梁晨[1];李诗谊[1];李嘉煜[1];易致远[1];徐放[1];王一兴[1];雷林峰[1];朱明辉[1];李思瑶[1];庄林洲[1];徐至[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：66

期号：7

起止页码：2662

中文期刊名：Science China Materials

外文期刊名：中国科学（材料科学（英文版）

收录：CSTPCD;;EI(收录号：20231814028718);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000979140300001)】；CSCD:【CSCD2023_2024】；PubMed;

基金：AcknowledgementsThis work was supported by the National Key R&D Program of China (2021YFB3801301), the National Natural Science Foundation of China (22075076 and 22005098), and the Central Government Funds for Guiding Local Science and Technology Development (2021Szvup040).

语种：中文

中文关键词：oxygen vacancies;kirkendall voids;superhydrophilic/superaerophobic surface;nickel(iron)oxyhydroxides;water splitting

外文关键词：oxygen vacancies; kirkendall voids; superhydrophilic; superaerophobic surface; nickel (iron) oxyhydroxides; water splitting

摘要：对高效催化剂进行多尺度调控可优化中间体的吸附能量(原子层面),并实现快速传质(三维宏观层面),这对于提升整体水分解性能至关重要.在本工作中,我们首先在镍铁氢氧化物中引入氧空位,然后通过磷化反应将其转化为具有纳米阵列形态的NiFe-Vo-P催化剂.在析氧反应催化过程中,NiFe-Vo-P表面会原位形成磷酸盐阴离子及具有催化活性的Ni(Fe)OOH,能显著优化反应中间体的吸附强度.结果表明,NiFeVo-P在过电位为289 mV时电流密度可达1.5 A cm^(-2).同时,其超亲水/超疏气纳米阵列形貌可有效促进传质,在25和70℃的条件下,可在~2.0V的电池电压下分别获得580 mA cm^(-2)和1.0 A cm^(-2)的电流密度,是未进行超疏气形貌工程催化剂的电流密度的2倍以上.
Multiscale engineering of efficient catalysts to optimize the adsorption energy of intermediates(atomic level)and achieve rapid mass transfer(three-dimensional(3D)bulk level)is crucial for boosting overall water splitting.In this work,we first create oxygen vacancies in nickel-iron hydroxide and then transform the hydroxide into NiFe-Vo-P having a nanoarray morphology via phosphorization.During the oxygen evolution reaction,Ni(Fe)OOH and phosphate anions can be in situ formed on the NiFe-Vo-P surface and optimize the adsorption strength of the intermediates.Consequently,NiFe-Vo-P could achieve a high current density of 1.5 A cm^(?2) at an overpotential of 289 mV.Moreover,the superhydrophilic/superaerophobic nanoarray morphology of NiFe phosphide effectively facilitates the mass transfer,and NiFe-Vo-P achieves current densities of 580 mA cm^(?2) and 1.0 A cm^(?2) at a cell voltage of~2.0 V at 25 and 70℃,respectively,over twice those of its counterpart without the superaerophobic morphology.