Inorganic Chemistry Frontiers最新文献

{"title":"Tannic acid salt-modified CoFe-layered double hydroxide boosts stable seawater oxidation at an industrial-level current density†","authors":"Zhengwei Cai, Yaxin Guo, Chaoxin Yang, Zixiao Li, Shengjun Sun, Meng Yue, Xiaoyan Wang, Min Zhang, Hefeng Wang, Yongchao Yao, Dongdong Zheng, Asmaa Farouk, Fatma A. Ibrahim, Yanqin Lv, Xuping Sun and Bo Tang","doi":"10.1039/D4QI02404D","DOIUrl":"10.1039/D4QI02404D","url":null,"abstract":"<p >Seawater electrolysis for green hydrogen production is a promising approach toward achieving carbon neutrality. However, the abundance of Cl<small>⁻</small> in seawater can severely corrode catalytic sites, significantly reducing the lifespan of seawater electrolysis systems. Herein, we present metal ion-chelated tannic acid nanoparticles anchored on the CoFe layered double hydroxide nanosheet array on nickel foam (CoFe LDH@CoFe-TA/NF), synthesized <em>via</em> an interfacial coordination assembly method, serving as an efficient and stable electrocatalyst for alkaline seawater oxidation (ASO). The formed CoFe-TA nanoparticles promote the transformation of Co<small>³⁺</small> into the more robust acid Co<small>⁴⁺</small>, thereby favoring the adsorption of the hard base OH<small>⁻</small> rather than the soft base Cl<small>⁻</small>. In addition, the CoFe-TA ligand network effectively inhibits metal ion leaching and stabilizes active sites. As a result, the CoFe LDH@CoFe-TA/NF electrode requires a low overpotential of only 379 mV to obtain a current density of 1000 mA cm<small>⁻²</small> in 1 M KOH + seawater. Furthermore, the electrode also shows a stable operation for 450 h at an industrial-level current density, underscoring its potential for sustainable energy applications.</p>","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":" 1","pages":" 154-160"},"PeriodicalIF":6.1,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142671072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interface engineering of highly stable CeO2/CoFe@C electrocatalysts for synergistically boosting overall alkaline water splitting performance†","authors":"Waleed Yaseen, Karim Harrath, Guangya Li, Bashir Adegbemiga Yusuf, Suci Meng, Meng Xie, Iltaf Khan, Jimin Xie, Changkun Xia and Yuanguo Xu","doi":"10.1039/D4QI02487G","DOIUrl":"10.1039/D4QI02487G","url":null,"abstract":"<p >Electrochemical water splitting produces “green hydrogen,” a clean, sustainable fuel that can eventually contribute to carbon neutrality. However, the big challenge to the widespread adoption of water-splitting technology is the complex synthesis routes that involve harmful or expensive chemicals and sluggish reaction kinetics. This work presents a scalable and environmentally friendly solvent-free strategy for <em>in situ</em> synthesis of highly dispersed CeO<small>₂</small>/CoFe nanoparticles encapsulated within 3D hierarchically porous carbon heterostructures (CeO<small>₂</small>/CoFe@C) <em>via</em> a simple pyrolysis process. The optimized Ce<small>₂₀</small>/CoFe@C/750 catalyst shows low overpotentials of 114 and 191 mV at 10 mA cm<small>⁻²</small> toward the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER), respectively, in 1.0 M KOH. Two-electrode systems achieve a cell voltage of 1.508@10 mA cm<small>⁻²</small> with robust stability over 500 h in 1.0 M KOH. This notable performance is attributed to the hierarchically porous nanosheet architecture with a superhydrophilic surface that facilitates mass transport, and rapid H<small>₂</small>/O<small>₂</small> gas bubble escape, and the synergistically coupled CeO<small>₂</small>/CoFe heterointerface and abundant oxygen vacancies boost overall activity, particularly for the OER. Additionally, experimental results indicate that the optimum performance depends critically on the effect of changing Ce concentration. Density functional theory (DFT) calculations suggest that optimizing the CeO<small>₂</small>/CoFe interface triggered CeO<small>₂</small> reconstruction, where oxygen migration to CoFe created vacancies. Also, this reduction of the Ce site at the interface and the availability of d and f orbitals contribute to bonding and antibonding adsorbates, thereby moderating their adsorption energy and boosting OER activity. This study demonstrates the significance of rational design concepts in catalyst structure optimization, resulting in noticeably improved overall water-splitting performance.</p>","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":" 1","pages":" 273-290"},"PeriodicalIF":6.1,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Steric Effect Induced Modulation on Crystallographic Symmetry: Implementing Ferroelasticity in Molecular Ferroelectric","authors":"Jie Yao, Zi-Jie Feng, Jinqi Hu, Guowei Du, Yu-An Xiong, Haoran Ji, Tai-Ting Sha, Xiangzhi Zhang, Zheng-Yin Jing, Qiang Pan, Huihui Hu, Yu-Meng You","doi":"10.1039/d4qi02527j","DOIUrl":"https://doi.org/10.1039/d4qi02527j","url":null,"abstract":"Ferroelastic materials, as a significant category within the primary ferroic materials, have paved the way for the development of shape memory, superelasticity, tunable electronics, MEMS and actuators. The ferroic phase transition rules summarized by Aizu provides a theoretical guideline for material design. However, ferroelectrics and ferroelastics are to some extent intertwined with each other. Decoupling these properties is essential for optimizing material performance and developing better theoretical models. By modifying [(CH3)4N][FeCl4], a typical molecular ferroelectric that is not ferroelastic, we synthesized (Me2EtNCH3CH2Cl)FeCl4 (DMCE-FeCl4), an organic–inorganic hybrid compound that introduces ferroelasticity while maintaining ferroelectricity. DFT calculations reveal that the shape of the organic cations contributes to ferroelasticity, while their dipole moments contribute to ferroelectricity. This work advances the understanding of ferroic properties and their independent control, with implications for reconfigurable memory devices and intelligent actuators.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"109 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142637482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Water-stable perovskite nanotube array with enhanced transport of charge carriers induced by functionalized polyoxometalate for the highly efficient photoreduction of uranium(vi)†","authors":"Yanli Yang, Keke Guo, Xue Bai, Maochun Zhu, Siyue Wang and Shuxia Liu","doi":"10.1039/D4QI02393E","DOIUrl":"10.1039/D4QI02393E","url":null,"abstract":"<p >Since metal halide perovskites (MHPs) possess excellent optoelectronic performances, constructing MHP-based photocatalysts is a promising strategy to promote photocatalytic uranium(<small>VI</small>) reduction. However, the instability of MHPs in water limits their practical application, which is still a major issue and challenge. In this work, we constructed a perovskite nanotube array-based catalyst encapsulated by a functionalized POM, (HMTA)<small>₃</small>Pb<small>₂</small>Br<small>₇</small>@STA-PW<small>₁₂</small>, which can maintain stability in water for 10 hours under stirring conditions. It is noteworthy that considering the “electron-sponge” property of POMs, STA-PW<small>₁₂</small> acting as an electronic transfer medium not only increases the stability of the catalyst in water due to the hydrophobic long-chain STA but also contributes to the separation of photogenerated carriers and enhances charge transfer from (HMTA)<small>₃</small>Pb<small>₂</small>Br<small>₇</small> to PW<small>₁₂</small>, which significantly enhances the photocatalytic activity. The enhanced electron carrier mobility (<em>μ</em><small>_e</small>) (1.1 cm<small>²</small> V<small>⁻¹</small> s<small>⁻¹</small>) and carrier diffusion length (245 nm) of (HMTA)<small>₃</small>Pb<small>₂</small>Br<small>₇</small>@STA-PW<small>₁₂</small> further illustrate its effective charge carrier transfer. DFT calculations further indicate the transition of electrons from (HMTA)<small>₃</small>Pb<small>₂</small>Br<small>₇</small> to PW<small>₁₂</small>, which greatly inhibits the recombination of photogenerated carriers, thereby advancing electron transfer. Finally, the synthesized catalyst exhibits an excellent performance in the photocatalytic removal of U(<small>VI</small>) with a removal rate of 99.3% at a U(<small>VI</small>) concentration of 40 ppm after 40 min under simulated sunlight.</p>","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":" 1","pages":" 261-272"},"PeriodicalIF":6.1,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In situ construction of donor–acceptor structured g-C3N4 nanotubes incorporated with pyridine heterocyclic rings for efficient photocatalytic water splitting†","authors":"Bo Zhang, Wenjing Luo, Luye Pan, Chenhuan Tian, Peipei Sun, Pengcheng Yan, Xianglin Zhu, Haibo Wang, Zhao Mo and Hui Xu","doi":"10.1039/D4QI02452D","DOIUrl":"10.1039/D4QI02452D","url":null,"abstract":"<p >Polymeric carbon nitride (PCN) materials, as an emerging class of metal-free photocatalysts, have demonstrated significant potential in the field of solar energy conversion, particularly in areas of water splitting. But the utilization of PCN is restricted by its high carrier recombination rate and low charge transfer efficiency. In order to address these challenges, this work involves choosing pyridyl organic small molecules of nicotinic acid (NA) and melamine to construct donor–acceptor (D–A)-structured carbon nitride nanotubes. Pyridine heterocyclic rings are converged at the edge of the PCN structure <em>via</em> supramolecular self-assembly, facilitating the fabrication of donor–acceptor-structured carbon nitride nanotubes. The pyridine heterocyclic rings, with their strong electronic ability, create a preferred pathway for electronic transfer. This effectively mitigates carrier recombination within the molecular plane. In addition, the unique hollow tubular structure of carbon nitride nanotubes enhances their visible light absorption ability, expands the surface area of the catalyst, and then increases the number of catalytically active sites, which consequently enhances photocatalytic performance. The H<small>₂</small> production rates of one-dimensional tubular carbon nitride doped with 100 mg of NA (designated as NA<small>₁₀₀</small>-CN) is 2584.2 μmol g<small>⁻¹</small> h<small>⁻¹</small>, which is 4.7 times that of pristine PCN. This investigation elucidates the mechanism of charge transfer from D to A, describing the response mechanism of photocatalysis, with profound implications for advancing clean energy, environmental preservation and sustainable development.</p>","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":" 1","pages":" 161-170"},"PeriodicalIF":6.1,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142601373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancement of the dynamic luminescence and self-recovery performance of Zn2+ co-doped Sr3Ga4O9:Sm3+","authors":"Jingjing Li, Zhangwen Long, Xiaqing Jiang, Junyi Yang, Dacheng Zhou, Yong Yang, Qi Wang, Hao Wu and Jianbei Qiu","doi":"10.1039/D4QI02564D","DOIUrl":"10.1039/D4QI02564D","url":null,"abstract":"<p >Dynamic luminescence materials overcome the disadvantages of traditional static anti-counterfeiting materials that are easy to imitate, but the repeated display of dynamic luminescence is still a challenge. In this work, the dynamic luminescence material Sr<small>₃</small>Ga<small>₄</small>O<small>₉</small>:Sm<small>³⁺</small> was synthesized. It was found that under 254 nm irradiation, the color of PL gradually changed from purple to pink in tens of seconds. More importantly, the dynamic luminescence intensity and self-recovery performance of the phosphor were improved by doping with Zn<small>²⁺</small>. The experimental results show that this is achieved by Zn<small>²⁺</small> acting as a new dynamic luminescence center and enhancing the density of shallow traps. In addition, multi-color secondary dynamic luminescence, which is used in the field of anti-counterfeiting, was experimentally demonstrated. This study provides a new perspective on the synergistic enhancement of dynamic luminescence intensity and rapid self-recovery.</p>","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":" 24","pages":" 8762-8769"},"PeriodicalIF":6.1,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142601643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metal node exchange-driven ligand-strain modulation strategy for one-dimensional crystalline coordination polymers†","authors":"Gengxin Wu, Yong-Kang Zhu, Dongxia Li, Jia-Rui Wu, Yan Wang, Zhiquan Zhang and Ying-Wei Yang","doi":"10.1039/D4QI02422B","DOIUrl":"10.1039/D4QI02422B","url":null,"abstract":"<p >Engineering ideal functional coordination polymers (CPs) <em>via</em> post-synthetic modification has emerged as a powerful synthetic strategy to achieve desirable functionalities and superior properties. In this work, we report a versatile ligand-strain modulation strategy that harnesses ligand strain to modify the skeleton conformation of CPs by metal node exchange. A one-dimensional (1D) crystalline CP, <strong>Ag(<small>I</small>)-L</strong>, featuring a curved ligand geometry, is prepared through a direct synthesis route. Exploiting polarization differences between different metal ions, we successfully regulate the ligand strain, enabling a metal node exchange process that yields another crystalline CP, <strong>Cu(<small>I</small>)-L</strong>, exhibiting a distinct linear parallel ligand orientation. Significantly, the complete exchange of AgNO<small>₃</small> to CuI is achieved <em>via</em> solid–liquid contact, while only partial exchange occurs under grinding. This ligand-strain engineering strategy will open new avenues in constructing functional systems and supramolecular materials through dynamic metal exchange and ligand-strain control.</p>","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":" 24","pages":" 8916-8924"},"PeriodicalIF":6.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pentagonal-bipyramidal dysprosium(iii) complexes with two apical phosphine oxide ligands and equatorial pentadentate N3O2 Schiff-base ligands: breakdown of the apical magnetic axiality by a strong equatorial crystal field†","authors":"Tamara A. Bazhenova, Vyacheslav A. Kopotkov, Denis V. Korchagin, Elena A. Yureva, Mikhail V. Zhidkov, Alexei I. Dmitriev, Ilya A. Yakushev, Nikolay N. Efimov, Konstantin A. Babeshkin, Vladimir S. Mironov and Eduard B. Yagubskii","doi":"10.1039/D4QI02262A","DOIUrl":"10.1039/D4QI02262A","url":null,"abstract":"&lt;p &gt;A series of three new seven-coordinate pentagonal-bipyramidal (PBPY-7) Dy(&lt;small&gt;III&lt;/small&gt;) complexes, [Dy(L&lt;small&gt;&lt;sup&gt;CH&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;&lt;/sup&gt;&lt;/small&gt;)(Cy&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;PO)&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;]ClO&lt;small&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;/small&gt;·CH&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;CN (&lt;strong&gt;1&lt;/strong&gt;), [Dy(L&lt;small&gt;&lt;sup&gt;2(&lt;em&gt;t&lt;/em&gt;-Bu)&lt;/sup&gt;&lt;/small&gt;)(Ph&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;PO)&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;]ClO&lt;small&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;/small&gt;·0.63C&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;H&lt;small&gt;&lt;sub&gt;5&lt;/sub&gt;&lt;/small&gt;OH (&lt;strong&gt;2&lt;/strong&gt;), and [Dy(L&lt;small&gt;&lt;sup&gt;OCH&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;&lt;/sup&gt;&lt;/small&gt;)(Ph&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;PO)&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;]ClO&lt;small&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;/small&gt;·2H&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O (&lt;strong&gt;3&lt;/strong&gt;), including various chelating pentadentate ligands with [N&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;]&lt;small&gt;&lt;sup&gt;2−&lt;/sup&gt;&lt;/small&gt; binding node in the equatorial plane, L&lt;small&gt;&lt;sup&gt;CH&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;&lt;/sup&gt;&lt;/small&gt; = [2,6-diacetylpyridine bis(acetylhydrazone)]&lt;small&gt;&lt;sup&gt;2−&lt;/sup&gt;&lt;/small&gt;, L&lt;small&gt;&lt;sup&gt;2(&lt;em&gt;t&lt;/em&gt;-Bu)&lt;/sup&gt;&lt;/small&gt; = [2,6-diacetylpyridine bis(3,5di-&lt;em&gt;tert&lt;/em&gt;-butylbenzoylhydrazone)]&lt;small&gt;&lt;sup&gt;2−&lt;/sup&gt;&lt;/small&gt;, and L&lt;small&gt;&lt;sup&gt;CH&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;&lt;/sup&gt;&lt;/small&gt; = [2,6-diacetylpyridine bis(4-methoxybenzoylhydrazone)]&lt;small&gt;&lt;sup&gt;2−&lt;/sup&gt;&lt;/small&gt;, and two apical ligands Cy&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;PO and Ph&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;PO were synthesized and characterized structurally and magnetically. The ac magnetic measurements indicated the single-molecule-magnet (SMM) behavior of &lt;strong&gt;1–3&lt;/strong&gt; with energy barriers of &lt;em&gt;U&lt;/em&gt;&lt;small&gt;&lt;sub&gt;eff&lt;/sub&gt;&lt;/small&gt; ≈ 318–350 K. &lt;em&gt;Ab initio&lt;/em&gt; calculations and crystal-field (CF) analysis showed that the ground states of &lt;strong&gt;1–3&lt;/strong&gt; were a nearly pure Ising type Kramers doublet (KD&lt;small&gt;&lt;sub&gt;0&lt;/sub&gt;&lt;/small&gt;) |±15/2〉&lt;small&gt;&lt;sub&gt;eq&lt;/sub&gt;&lt;/small&gt; with the long magnetic axis lying in the equatorial plane of N&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;, which was the opposite of high-performance PBPY-7 Dy(&lt;small&gt;III&lt;/small&gt;) SMMs (&lt;em&gt;U&lt;/em&gt;&lt;small&gt;&lt;sub&gt;eff&lt;/sub&gt;&lt;/small&gt; &gt; 1000 K), where the long magnetic axis of KD&lt;small&gt;&lt;sub&gt;0&lt;/sub&gt;&lt;/small&gt; |±15/2〉 invariably pointed toward apical ligands. This difference is due to competition between the apical and equatorial CFs, which have been quantitatively examined with CF calculations. We show that the turning of the long magnetic axis (&lt;em&gt;g&lt;/em&gt;&lt;small&gt;&lt;sub&gt;&lt;em&gt;z&lt;/em&gt;&lt;/sub&gt;&lt;/small&gt; ∼ 19.6) from apical ligands (&lt;em&gt;z&lt;/em&gt;) to the equatorial plane (&lt;em&gt;xy&lt;/em&gt;) is due to crossover between the oblate |±15/2〉 and prolate |±1/2〉 ground states of the Dy(&lt;small&gt;III&lt;/small&gt;) ion, which occurs at the negative ratio of &lt;em&gt;B&lt;/em&gt;&lt;small&gt;&lt;sub&gt;20&lt;/sub&gt;&lt;/small&gt;/&lt;em&gt;B&lt;/em&gt;&lt;small&gt;&lt;sub&gt;40&lt;/sub&gt;&lt;/small&gt; &lt; −0.07 of the two axial CF parameters &lt;em&gt;B&lt;/em&gt;&lt;small&gt;&lt;sub&gt;20&lt;/sub&gt;&lt;/small&gt; and &lt;em&gt;B&lt;/em&gt;&lt;small&gt;&lt;sub&gt;40&lt;/sub&gt;&lt;/small&gt;. Complexes &lt;strong&gt;1–3&lt;/strong&gt; corresp","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":" 1","pages":" 231-252"},"PeriodicalIF":6.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dual-function applications of photochromic BiNbO4:Er3+ ceramics based on reversible upconversion luminescence modulation†","authors":"Asad Ullah, Imran Khan, Yangke Cun, Yue Liu, Zhiguo Song, Jianbei Qiu, Cherkasova Tatiana, Anjun Huang, Asif Ali Haider and Zhengwen Yang","doi":"10.1039/D4QI02440K","DOIUrl":"10.1039/D4QI02440K","url":null,"abstract":"<p >Photochromic luminescent phosphors have attracted considerable attention owing to their excellent optical properties, but they face the problem of limited application. Herein, the reversible photochromic and photo-/thermal bleaching phenomena of a BiNbO<small>₄</small> ceramic are reported, exhibiting a color change between ivory and grey upon alternating stimuli between 365/405 nm light illumination and 808 nm laser irradiation (or thermal treatment at 400 °C). Their potential coloration mechanisms are explained by the color center model, providing a comprehensive framework for understanding the original processes. Through Er<small>³⁺</small> ion doping, the maximum coloration contrast decreases from 24% to 20%, while simultaneously enabling the observation of bright green upconversion luminescence. Relying on the combination of re-absorption and energy transfer processes, the upconversion luminescence intensity of the Er<small>³⁺</small> ions can be effectively modulated, respectively, showing maximum regulation and recovery rates of 88.0% and 98.1%. The cycle measurements demonstrate the excellent anti-fatigue properties and reproducibility of BiNbO<small>₄</small>:Er<small>³⁺</small> ceramics, confirming their potential dual-functional applications in anti-counterfeiting and fingerprint acquisition.</p>","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":" 1","pages":" 144-153"},"PeriodicalIF":6.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The use of single-metal atom-based photocatalysts for the production of ammonia through photocatalytic nitrogen fixation","authors":"Ping Zhang, Yongchong Yu, Reyila Tuerhong, Xinyu Du, Keyi Chai, Xiaoping Su, Qing Su, Shujuan Meng and Lijuan Han","doi":"10.1039/D4QI02449D","DOIUrl":"10.1039/D4QI02449D","url":null,"abstract":"<p >The conventional synthetic ammonia industry is characterized by its high energy consumption, necessitating the exploration of a new environmentally sustainable method for NH<small>₃</small> synthesis. The photocatalytic nitrogen reduction reaction (pNRR) allows NH<small>₃</small> production under room conditions. The optimization of photocatalysts, particularly through the use of single-metal atom catalysts (SMACs), plays a significant role in enhancing the performance of pNRR. SMACs have garnered growing attention in photocatalysis for their exceptional catalytic activity, selectivity, stability, and complete atom utilization. These catalysts involve isolated atoms supported on substrates without aggregating into nanoparticles. In this review, we elucidate the mechanisms and pathways of pNRR, focusing on the latest advances in carbon-based and non-carbon-based SMACs, and conclude with an overview of the existing challenges and prospects of pNRR for sustainable ammonia production.</p>","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":" 1","pages":" 85-117"},"PeriodicalIF":6.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}