ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Yu-Jun Xu,Shuo Zhang,Meng-Ke Zhang,Ting-Ting Mao,Jun Cai,Yan-Xia Chen
Potential of zero free charge (PZFCs) of Pt(111)/0.1 M HClO 4 interface with adsorbed P-block elements X ad ( X = I, Br, Te, Se and S) of various coverages are investigated using electrochemical reduction of peroxodisulfate (PDS) as the probe reaction, aiming at understanding the mechanism of adatom in regulating the PZFCs of Pt(111)@X ad /0.1 M HClO 4 interface. Experimental observations reveal that increase adatom coverage on Pt(111) results in a monotonic positive shift in the PZFCs with S, Se and Br adatoms. The maximum PZFCs with saturated S ad , Se ad and Br ad are in the range of ca. 0.5–0.53 V RHE , which is positively shifted by ca. 0.14–0.17 V comparing to the PZFC of unmodified Pt(111)/0.1 M HClO 4 interface. In contrast, whereas I and Te adatoms lead to a nonmonotonic change of PZFCs with coverage, characterized by an initial positive shift up to ca. 0.51/0.48 V RHE followed by a sharp drop down to ca. 0.17/0.14 V RHE at higher coverages. The origin for such phenomenon can be well rationalized by the displacement of adsorbed water on Pt(111) by X ad , such displacement induced change of electron spillover from the Pt surface as well as the electronic effect of X ad and Pt.
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PHYSICA B-CONDENSED MATTER
·
2024
·
IF 2.8
Yongyi Li,Huixing Yang,Wei Li,Zhigang Shao,Yongzhuo Yu,Huixiang Yan,Shichao Jiao,Di Lin,Wenxu Zhang,Chaoyu Lv,Yuxin Huang
In this work, ultrathin lamellar g-C 3 N 4 /In 2 S 3 S-scheme heterojunctions doped with P were synthesized by urea recrystallization and investigated to see which ratio was more favorable for photocatalysis. The P doping formed a new Fermi energy level and reduced the forbidden bandwidth. The ultrathin lamellar structure facilitated rapid charge transfer, and the formation of S-scheme heterojunction, the presence of the interfacial electric field, and band bending effectively separated strong redox-capable electron-hole pairs, thus significantly improving the photocatalytic performance. Among the prepared materials, the 50UP-C 3 N 4 /In 2 S 3 photocatalyst with 50 % UP-C 3 N 4 mass fraction showed optimal photocatalytic H 2 production performance, with a hydrogen production rate of 12,387 μmol h −1 g −1 . Moreover, it showed good performance in photocatalytic degradation, with a degradation efficiency of up to 90.2 % of ofloxacin after 120 min of light exposure. This article provided a new perspective on the synthesis of other photocatalysts with carbazide-based S-scheme heterojunction structures.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Huanhuan Wu,Huihui Ding,Jun Ma,Xiang Li,Shuangshuang Huai,Chengming Zhang,Ping Li,Jingjing Xia,Xiaolong Fang,Xiufang Wang
Limited charge transfer and slow oxygen evolution (OER) kinetics significantly impede the practical realization of photoanodes for photoelectrochemical (PEC) water splitting. Here, pn-type-Fe 2 O 3 homojunction photoanode catalysts with P active sites are designed by doping phosphorus (P) into outer lattice of n-type Fe 2 O 3 nanorods (pn-P-Fe 2 O 3 ). The optimized pn-P-Fe 2 O 3 photoanode shows the maximum photocurrent density of 2.61 mA/cm 2 at 1.23 V RHE , and the value is 6.4 times greater than that of pristine Fe 2 O 3 . Experimental and theoretical results clearly show that the P–N homogeneous junctions constructed in Fe 2 O 3 through P-doping increase active sites for H 2 O adsorption and activation, reduce OER reaction energy barrier, and promote effective separation of photogenerated electron-hole pairs and water splitting kinetics. This not only makes the photoelectric water decomposition performance outstanding, but also produces excellent durability. This work provides a novel simple and environmentally friendly strategy for designing effective photoanodes for PEC water splitting.
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ChemSusChem
·
2024
·
IF 7.5
Lina Jia,Gaohui Du,Di Han,Yunting Wang,Youqing Wang,Huayu Li,Wenqi Zhao,Shixian Chen,Miao Zhang,Qingmei Su,Bingshe Xu
Graphical P-doped NiFe 2 O 4 nanoparticles/N-doped carbon nanotubes are prepared via a hydrothermal method followed by phosphorization. The CNTs greatly enhance the electron transfer rate and the P-doping effectively modulates the charge distribution around Ni and Fe atoms, optimizes the energy barriers of adsorption of intermediates, urea and water dissociation, thereby accelerating the kinetics of water splitting and urea electrolysis. The design and construction of highly efficient electrocatalysts for overall water splitting and urea electrolysis are significantly important for promoting energy conversion and realizing green hydrogen production. In this work, we constructed a multi-phase heterojunction through a simple hydrothermal and phosphorization process. The P-doped NiFe 2 O 4 (P-NiFe 2 O 4 ) nanoparticles were uniformly anchored on the bamboo-like N-doped carbon nanotubes (NCNTs) grown via a NiFe-alloy autocatalysis. The electronic structure and coordination environment of active species were optimized by the synergistic action of P doping, well-dispersed ultrafine NiFe 2 O 4 , and NCNTs matrix with good conductivity, enhancing their quantity and activity for electrocatalysis. Consequently, the P-NiFe 2 O 4 /NCNTs/NiFe exhibits excellent HER and OER activities with an overpotential of 111 and 266 mV at 10 mA cm −2 in 1 M KOH, respectively. The symmetrical overall water-splitting cell using P-NiFe 2 O 4 /NCNTs/NiFe as both anode and cathode delivers 10 mA cm −2 at a voltage of 1.604 V in 1 M KOH. Notably, the two-electrode cell requires a low voltage of 1.467 V to achieve a current density of 10 mA cm − 2 in 1 M KOH solution with 0.6 M urea. This designed catalysts display outstanding reaction kinetics and catalytic stability. This work provides useful guidance for applying transition metal-based catalysts for hydrogen production.
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PROGRESS IN ORGANIC COATINGS
·
2024
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IF 6.5
Tao Li,Zhiping Zhu,ShangMing Zhou,Huo Yang
2D nanofillers can effectively improve coatings' barrier and anti-corrosion properties but are less compatible with coatings and prone to agglomeration. In this paper, glucose-derived phosphorus-doped carbon dots (P-CDs) were prepared as dispersants, and functionalized α-zirconium phosphate (α-ZrP) was prepared by combining with α-ZrP through π-π interactions, which showed good dispersion and compatibility in waterborne epoxy (WEP). The corresponding modified WEP coating is prepared on Q235 substrates through the scrape coating method. The effect of fillers on the physical and chemical properties of the coating was studied by electrochemical impedance spectroscopy (EIS), neutral salt spray test, and immersion test. The results of the electrochemical test show that the |Z| 0.01 Hz value of the coating prepared by P-CDs@ZrP as the filler after soaking in 3.5 wt% NaCl solution for 30 d is three orders of magnitude higher than that of the WEP coating, and the corrosion resistance is greatly improved. The salt spray and soaking tests prove that the prepared P-CDs@ZrP coating has excellent barrier properties and corrosion resistance. Besides, P-CDs can also act as an effective passivation agent, which could adsorb on the surface of the Q235 substrate and form a passivation film, preventing further corrosion of the substrate. This study provides a new way to enhance the corrosion resistance of the coating.
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RSC Advances
·
2024
·Vol. 14
·期 5
·2993-2999
·
IF 3.9
Bin Li,Haiying Liu,Mengjing Zhou,Aolin Wu,Wenrui Hao,YaJun Jiang,Zhigang Hu
Deep eutectic solvents (DES) were prepared using urea (U) and acrylamide (AM) as hydrogen bond donors (HBD) and choline chloride (ChCl) as hydrogen bond acceptor (HBA), and polyethylene glycol (PEG) was selected as a filler and uniformly dispersed in DES to prepare PEG/P(U-AM-ChCl) composite hydrogels by light polymerization. The composite hydrogels were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The effects of the content of PEG on the swelling properties, mechanical properties and fatigue resistance of the composite hydrogels were investigated. The results showed that the compressive strength and fatigue strength of the composite hydrogels were gradually enhanced with the increase of the PEG content in the composite hydrogels, in which the maximum compressive strength of the hydrogels with 1 wt% PEG added was increased by 1.86 times. The composite hydrogel had excellent swelling properties, and the equilibrium swelling degree of the hydrogel with 1 wt% PEG added reached 10.15. Meanwhile, the PEG/P(U-AM-ChCl) composite hydrogel had excellent self-healing properties, and the self-healing rate of the composite hydrogel with a PFG content of 1 wt% could reach 91.93% after 48 hours of healing. This study provides a convenient and efficient method to prepare composite hydrogels with superior swelling properties and self-healing properties.
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Carbon Energy
·
2024
·Vol. 6
·期 8
·e541
·
IF 19.5
Zhuang-Hao Zheng,Yi-Ming Zhong,Yi-Liu Li,Mohammad Nisar,Adil Mansoor,Fu Li,Shuo Chen,Guang-Xing Liang,Ping Fan,Dongyan Xu,Meng Wei,Yue-Xing Chen
Use of a flexible thermoelectric source is a feasible approach to realizing self-powered wearable electronics and the Internet of Things. Inorganic thin films are promising candidates for fabricating flexible power supply, but obtaining high-thermoelectric-performance thin films remains a big challenge. In the present work, a p -type Bi x Sb 2− x Te 3 thin film is designed with a high figure of merit of 1.11 at 393 K and exceptional flexibility (less than 5% increase in resistance after 1000 cycles of bending at a radius of ∼5 mm). The favorable comprehensive performance of the Bi x Sb 2− x Te 3 flexible thin film is due to its excellent crystallinity, optimized carrier concentration, and low elastic modulus, which have been verified by experiments and theoretical calculations. Further, a flexible device is fabricated using the prepared p -type Bi x Sb 2− x Te 3 and n -type Ag 2 Se thin films. Consequently, an outstanding power density of ∼1028 μW cm −2 is achieved at a temperature difference of 25 K. This work extends a novel concept to the fabrication of high-performance flexible thin films and devices for wearable energy harvesting.
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Advanced Industrial and Engineering Polymer Research
·
2025
·
IF 12
Change Wu,Yu Ding,Min Xiao,Dongmei Han,Sheng Huang,Shuanjin Wang,Yuezhong Meng
Poly(propylene carbonate-co-phthalate) (PPC-P), limited by inferior melt strength and heat resistance, exhibits poor foamability and thermal stability. This study enhances PPC-P through biodegradable PLA incorporation and HDI-induced dynamic vulcanization of terminal hydroxyl groups, improving the interfacial compatibility. The gel contents, rheological properties, crystallization behaviours, mechanical properties, compatibility and microstructures of the PPC-P/PLA blends are investigated in detail. By adjusting the compatibilizer-NCO dosage and PLA contents, the melt strength and viscoelasticity of the blends are effectively enhanced and regulated. Enhanced interfacial compatibility among PPC-P and PLA phases, improves the tensile strength and elongation at break of PPC-P/PLA composites, with values of 48.2 MPa and 12.9%, respectively. By using the sub-critical CO 2 as blowing agent, light weight and low-shrinkage PPC-P/PLA foams with well refined cell structures are successfully obtained, which can be attributed to the improved melt strength and the induced thermal stability. The relationship between the crosslinked-crystalline network and the foam quality are established, including CO 2 solubility, cell microstructure, and dimensional stability. PPC-P/PLA foams show refined microstructures (cell size < 50 μm, cell density > 1.5×10 9 cells/cm 3 , VER > 20), and low shrinkage (< 25%). Here, the crosslinks and crystals play multiple essential roles in increasing the melt strength and foamability of PPC-P, providing a widely applicable low-shrinkage strategy, which is crucial for the biodegradable foams.
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Energy Storage Materials
·
2024
·
IF 18.9
Mingli Xu,Chen Wu,Fengxue Zhang,Yanhui Zhang,Jiaxin Ren,Chengyi Zhang,Xuanze Wang,Li Xiao,Olivier Fontaine,Jiangfeng Qian
Conventional metallurgical technologies for recycling cathode materials from retired Li-ion batteries go against carbon neutrality owing to massive material input and energy consumption. Although featuring with simplified process, direct regeneration technology still fails to bypass high-temperature driving forces for Li + compensation of degraded cathodes. Herein, chemical re-lithiation strategy mediated by ferrocene is proposed to directly regenerate the Li-deficient spent cathodes. Ferrocene and its derivatives, the so-called p-type redox mediators, can be oxidized spontaneously from neutral molecules to stable cations under ambient conditions, allowing them to function as electron donors . Meanwhile, lithium salts serve as Li + donors to ensure charge neutrality of the cathode lattice. The effects of solvation and substituent are thoroughly investigated to precisely regulate the potential of a series of ferrocene-based reductants. Chemical re-lithiation is driven thermodynamically by the intrinsic potential gap between ferrocene and degraded cathodes, thus fundamentally realizing a rapid lithiation reaction (taking less than 20 min at 25 °C), while avoiding the involvement of high-temperature operation. Diverse characterizations have been performed to explore the Li + -electron concerted re-lithiation mechanism. The regenerated LiFePO 4 cathode demonstrated comparable Li + storage capability to commercial cathode. Life-cycle analysis verifies the economical and environmental superiority of our chemical re-lithiation strategy to metallurgy in practical industry. The thermodynamically spontaneous chemical re-lithiation provides competitive options for greener recycling of retired batteries in the future.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Sike Xie,Yujie Huang,Yanjian Xie,Wei Zhang,Yijian Zhong,Zhihao Liu,Zhixin Liang,Jintao Qi,Yangyang Huang,Jian Peng,Shaoming Huang
Sodium metal anodes (SMAs) are pivotal for high-energy-density batteries but suffer from uncontrolled dendrite growth and interfacial instability caused by infinite volume expansion and a fragile solid electrolyte interphase (SEI). Herein, an innovative strategy is proposed, in which a p-block matrix is in-situ formed from NiTe 2 nanocrystals onto N-doped carbon hollow microspheres (NiTe 2 @NC) during electrochemical activation to overcome these challenges. The p-block matrix with sodiophilic Na 2 Te and conductive metallic nickel effectively reduces the nucleation barrier and establishes bi-continuous ion/electron conduction networks, guiding uniform Na plating. Critically, Na 2 Te dominates the formation of a gradient inorganic-rich SEI with high Young's modulus and low Na⁺ diffusion barrier, significantly enhancing mechanical resilience and ion transport kinetics. Consequently, the NiTe 2 @NC electrode achieves exceptional cyclability (1,000 cycles at 1.0 mA cm − 2 /1.0 mAh cm − 2 with an average Coulombic efficiency of 99.79%). When configured in full-cells with a Na 4 Fe 3 (PO 4 ) 2 P 2 O 7 cathode, it maintains the capacity retention of over 96.1% (103.9 mAh g − 1 ) after 1,200 cycles at 10.0 C. Critically, the full-cell maintains superior electrochemical resilience with high discharge-capacity and >90% retention at low-temperatures (−20 and −40 °C), demonstrating exceptional practicality for sodium metal batteries. This work establishes a new paradigm for stabilizing reactive metal anodes via in-situ-constructed multifunctional interfaces.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2025
·
IF 2.6
Bi Mengqi,Liu Wei,Yang Menghui,Huang Naibao
To enhance the corrosion resistance of 316L stainless steel, which is a potential alternative bipolar plate material for PEMWE or PEMFC, Ni–P amorphous coating was prepared by DC electrodeposition method. The results indicated that the coating’s structure strongly related to the phosphorus (P) content. Under specific phosphorus content conditions, a dense coating (Ni–P-30) with typical amorphous characteristics can be obtained, with a uniform surface morphology and no obvious structural defects. In simulated PEMWE environment, Ni–P-30’s corrosion current density decreased by one order of magnitude and the corrosion potential shifted positively by 0.29 V comparing with untreated steel. The excellent corrosion resistance of the amorphous Ni–P coating is attributed by its continuous and dense microstructure, functioning as an effective physical barrier. Meanwhile, during corrosion process, the P will enrich on the surface from the preferential dissolution of nickel in amorphous Ni–P coatings, improving the corrosion potential, reducing the corrosion current and inhibiting the hydration of Ni. Preliminary studies have shown that Ni–P-coated 316L stainless steel can be used as a replacement for graphite as a bipolar plate for PEMWE and PEMFC.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Songlei Mo,Xiaohui Liu,Yanqin Wang
The upcycling of polyethylene terephthalate (PET) waste into value-added chemicals is of great interest. However, the diversity of currently accessible PET-derived high-value products remains limited, posing a significant challenge to expanding their scope. Herein, we report a three-step catalytic process for converting PET waste into p-xylylenediamine (PXDA)—an essential monomer for producing high-market-value polyamides, polyimides, and nonisocyanate polyurethanes. Specifically, PET is first transformed into terephthalamide (TP) via ammonolysis, and subsequently dehydrated to terephthalonitrile (TPN), the key intermediate for PXDA synthesis. Successful separation of each intermediate ensures efficient hydrogenation of TPN to PXDA, achieving an overall PXDA yield of 54.5 % from PET. Furthermore, the transformation of common real plastic waste and scale-up experiments demonstrate the robustness and substantial industrial potential of this catalytic route. This study establishes a viable and promising strategy for upcycling PET waste into high value-added product PXDA, significantly broadening the scope of PET-derived chemicals and stimulating further exploration of other valuable derivatives.
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