ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Liangbin Xia,Qing Wang,Fang Wang,Yaru Li,Yining Cao,Yongpeng Ren,Ihar Razanau,Kunming Pan
Nickel-based catalysts demonstrate considerable promise for the hydrogen evolution reaction (HER), yet attaining both exceptional activity and sustained durability under prolonged operation persists as a critical research challenge. Herein, a directed self-growth strategy is employed to synthesize Ni-MOF nanosheets with a well-ordered morphology on the nickel foam (NF) surface via strong acid etching followed by ligand introduction. The dense Ni2+ layer generated by acid etching, as a seed, promotes strong bonding between the Ni-MOF and the NF substrate, which accelerates electron transport to the active layer and prevents catalyst detachment during long-term operation. Additionally, the Ni/NiO heterostructure obtained via pyrolysis forms an electron transfer channel that optimizes *H and *H2O adsorption on the Ni side while facilitating *OH desorption through its migration to the NiO domain, collectively contributing to improved HER kinetics. In situ Raman spectra reveal the evolution of key intermediates during the HER, corroborating the DFT predictions and highlighting the critical role of interfacial H2O structures in catalytic performance. The obtained S-Ni-MOF/NF-400 catalyst exhibits an ultralow overpotential (20 mV–10 mA cm–2), surpassing commercial Pt/C catalysts. Moreover, long-term stability tests demonstrate significant improvements in durability. This work not only introduces an outstanding Ni-MOF-based catalyst but also presents a novel strategy for designing highly active and stable HER catalysts.
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DOI
PubMed
高影响因子
Materials Today Physics
·
2025
·
IF 9.7
Wenqi Guo,Guangping Yang,Tianxiang Yang,Yali Tuo,Zhiguo Wang,Xiaorong Xu,Chaowei Luo,Haoyi Chen,Tianyi Zhang,Changcheng Chen,Sining Yun
Due to the urgent demand for clean energy transitions, the development of bifunctional electrode materials with efficient energy storage and conversion capabilities has become a priority. This paper presents a novel nanohydrangea-like BNC@NiO/NiSe 2 composite with triple-phase heterointerfaces fabricated using boric acid-modified ZIF-8-derived B/N co-doped porous carbon (BNC) and a controlled selenization strategy. The heterogeneous structural design facilitated interfacial electron delocalization and constructed a three-phase built-in electric field, optimizing electron transport paths and active site distribution, and improving the charge transfer efficiency. The 3D porous BNC matrix effectively prevented NiO/NiSe 2 nanosheet aggregation, whereas interfacial charge redistribution significantly enhanced the conductivity and reaction kinetics. As a supercapacitor electrode, BNC@NiO/NiSe 2 delivered a high specific capacitance of 862 F g −1 at 1 A g −1 and maintained 416 F g −1 at 20 A g −1 (retaining 70.8 % capacity after 2000 cycles). For the hydrogen evolution reaction, BNC@NiO/NiSe 2 achieved a low overpotential ( η 10 ) of 126 mV with a Tafel slope of 74 mV dec −1 , demonstrating 100 h stability. Density functional theory (DFT) calculations revealed that heterogeneous interfaces promoted electron delocalization and facilitated the formation of directional built-in electric fields through electron density differences, synergistically optimizing the redox kinetics and charge transfer efficiency. This study provides new insights into the design and use of heterojunction materials as high-performance, stable bifunctional electrodes.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Ming Yang,Lihong Liu,Bo Li,Yannan Mu,Jiaming Chen,Shan Gao,Yingming Xu,Lihua Huo
At present, the effective detection of H 2 S is of indispensable significance for safeguarding human health and maintaining production safety. In this study, a simple ammonia volatile liquid phase deposition method was adopted to in-situ construct cross-linked porous NiO nanoflakes composites on the surface of graphene (Gr) layers under mild conditions from room temperature to calcination. Through regulating the deposition reaction time, the proportion of NiO to Gr components in the composite material can be flexibly controlled. Among them, the NiO nanoflakes/Gr-8 material prepared by deposition for 8 h shows the optimal H 2 S gas sensitivity performance. At the optimal operating temperature of 92℃, the detection limit of H 2 S of this sensor is as low as 10 ppb, and its performance is significantly better than that of most sensing materials. Its outstanding performance stems from multi-dimensional structural optimization: NiO serves as the gas-sensitive active center to dominate the sensing response. The introduction of Gr increases the specific surface area of the material and significantly enhances its electrical conductivity. Particularly crucial is that the p-p heterostructure formed at the NiO/Gr interface effectively promotes the ionization of adsorbed oxygen ions. This study provides a new idea for the development of high-performance H 2 S gas sensors through a collaborative optimization strategy of “active components-conductive substrates-heterostructure interfaces”.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Jiajia Wang,Yuanyuan Liu,Zeyan Wang,Peng Wang,Zhaoke Zheng,Xiaoyan Qin,Xiaoyang Zhang,Ying Dai,Baibiao Huang
Enhancing the photocatalytic activity of NiO towards hydrogen generation (6 times) is achieved by phenyl phosphoric acid (PPA) surface modification. The photocatalytic activity can be further improved by changing PPA to 4-aminophenyl phosphonic acid (PPA-NH 2 ), about 10 times, suggesting the functional group plays an important role in improving the activity. A chemical bond (Ni O P) between NiO and organic phosphoric acid was proved by FT-IR spectra. XPS and LSV analysis suggested organic phosphonic acid modification increased the electron density of Ni, which promoted the transformation from Ni 2+ to Ni 0 . Mott-Schottky (M − S) measurement revealed that PPA-NH 2 modified NiO processed a larger the space charge layer thickness (d sc ), which enhanced ability towards H 2 evolution from dynamical aspect.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Zhen Peng,Xiaojie Yin,Tianli Han,Jiawei Long,Jinpei Hei,Jinyun Liu
High energy-storage Li-ion battery needs a high-capacity anode. However, current graphite-based anode doesn’t meet this requirement, thus developing high performance anode materials is highly needed and significant. Here, we provide a rational engineering of a multi-layered hollow structure combining with surface coating of polyamine (PANI) layer, forming a Co 3 O 4 /NiO@PANI hybrid using for Li-ion battery anode. PANI is able to effectively improve the conductivity of active materials; besides, PANI is flexible, which can prevent the collapse of the structure caused by volume-expansion during charge and discharge. The multi-layered morphology improves the utilization ratio of voids inside the conventional hollow structured materials, which is significant to improve capacity in practical applications. The Co 3 O 4 /NiO@PANI hybrid-based anode shows a capacity of 1049 mAh g −1 along with a Coulombic efficiency of 99.3% after 100 cycles of 0.2 A g −1 . Rate-performance of Co 3 O 4 /NiO@PANI exceeds that of the bare Co 3 O 4 /NiO. It is believed that the hierarchical structure combining multi-layered hollow morphology with surface coating of conductive polymer presented here would find broad applications for developing high-performance energy-storage hybrids.
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高影响因子
Catalysts
·
2025
·Vol. 15
·期 11
·1016
·
IF 4
Yun Xu,Tianfa Tang,Pengyao Wang,Chunlei Zhang,Jianbo Zhao,Ke Zhuang,Changjin Tang
The fabrication of highly loaded and uniformly dispersed metal oxide nanoparticles (NPs) is much desired but still remains a great challenge. Herein, the NiO NPs exclusively confined in mesoporous silica SBA-15 were obtained by using nickel nitrate hydrate as a precursor through a facile solvent-free preparation method, which comprised manual grinding of Ni(NO3)2·6H2O with SBA-15 and subsequent air calcination. Characterization results from X-ray diffraction (XRD) and transmission electron microscope (TEM) revealed that aggregation-free NiO nanoparticles with sizes of 3–5 nm were obtained at loading as high as 20wt.% (weight%). Further increasing the NiO loading to 30wt.% led to partial agglomeration of discrete nanoparticles to rod-like particles, while no external particles were observed. By comparing the sample derived from nickel acetate with exclusively external NiO particles, it was established that the pore confinement provided NiO nanoparticles with high thermal stability. Lastly, the catalytic performance of the prepared sample was evaluated in the model reaction of ammonia decomposition to COx-free H2, and the stable NH3conversion of 93.7% was achieved at the weight hourly space velocity (WHSV) value of 30,000 mL·g−1·h−1and at high temperature of 650 °C for 60 h, demonstrating the great potential of the solvent-free method in preparing thermally stable and robust supported catalysts.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Hesham Y. Amin,Safia Abdullah R. Alharbi,Abd El-razek Mahmoud,Essam A. Elkelany
Herein, a nickel-doped borate glass system, with variable additions of lead oxide, was prepared by melting and air quenching method. The impact of heavy lead oxide on structure, optical, electronic transitions, ligand field and nonlinear optical features was investigated. The glass structure was scrutinized by XRD, indicating the amorphousness of the current glass. The measured and empirical densities increased with lead oxide additions, indicating the densification of the network, while comparing both densities confirms the randomness of the glass network. Infrared spectra confirmed the deteriorated existence of non-bridging oxygen (NBO) bonds and the high ability of lead oxide to modify the glass network and form different structural units such as Pb . The current optical studies revealed the existence of ions in octahedral coordination, with high optical activity within some of the optronic transitions that were observed in visible and infrared regions. Among these optronic transitions, the transitions at 429, 524, 805 and 1222 nm were exploited using a Gaussian deconvolution process to determine the splitting energy and Racah parameters. Bewitchingly, the splitting energy increased; meanwhile, the Racah B and C parameters decreased, indicating that the lead addition increased the ligand- ions interaction energy and decreased the internal electronic interactions inside d-orbitals of ions. As a result of these interactions, the covalent bonding nature increased. Furthermore, lead oxide additions push the glass edges toward low energy, mitigating the optical band gaps from 3.41 eV to 2.92 eV, while Urbach energy increased due to enhanced amorphousness. Due to the higher polarizability of lead ions, the linear and non-linear optical properties of current glasses are enhanced.
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高影响因子
CARBON
·
2026
·
IF 11.6
Lijuan Cai,Shengxiang Xiong,Jun Chen,Yu Su,Jiyuan Cong,Gang Chen,Chengjun Dong,Hongtao Guan
In response to the burgeoning challenge of electromagnetic wave pollution, the development of high-performance electromagnetic wave absorbing materials with strong attenuation capability is urgently needed. In this study, a MXene/NiO nanowire hybrid aerogel was constructed via electrostatic self-assembly, leveraging a multi-mechanism synergistic loss strategy to significantly enhance the electromagnetic absorbing performance. The three-dimensional conductive network of the material optimizes impedance matching, facilitating electromagnetic wave penetration into the interior for multiple reflections and scattering, thereby reducing surface reflection. Simultaneously, the highly conductive MXene contributes to substantial conduction loss, while abundant defects (graphitic defects, oxygen-containing groups) and heterogeneous interfaces (MXene-NiO) induce notable dipole and interfacial polarization losses. Furthermore, the nano-heterostructure formed between NiO nanowires and MXene enhances interfacial polarization through charge accumulation at the interfaces. Benefiting from these synergistic loss mechanisms, the optimized aerogel exhibits exceptional electromagnetic wave absorption performance, achieving a minimum reflection loss ( RL min ) of −53 dB at a thickness of 1.6 mm and an effective absorption bandwidth (EAB) of 4 GHz. Our findings propose an innovative materials design doctrine enabling precise multi-scale regulation of electromagnetic wave absorption in aerogels.
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高影响因子
RSC Advances
·
2015
·Vol. 5
·期 123
·101487-101493
·
IF 3.84
Xin Zhang,Yongzhe Zhang,Bowen Zhao,Shujuan Lu,Hao Wang,Jingbing Liu,Hui Yan
Among the explored materials for electrochromic devices (ECDs), nickel oxide thin films have been widely applied as an optical anodic layer due to its ability to adjust the optical properties by ion exchange. Generally, to realize the three important characters including color contrast, switch speed and cycling durability, it requires the electrochromic layer to possess different microstructures or crystalline properties. Thus there is still difficulty in designing a suitable structure for NiO film to have excellent electrochromic performance. Here, a nanocrystalline modified nanocomb novel NiO structure is prepared by a simple chemical process. This novel microstructure shows highly multiple channels, high surface areas and good crystallinity. All of these characters produce a good electrochromic performance including fast switch speed (around 2 s), high color contrast (69.4%) and in company with good cycling durability (more than 1000 cycles). This simple chemical process demonstrated here could be suitable for the large scale production of future electrochromic device applications.
研究领域:
材料科学
·
纳米科技
·
功能材料
·
电化学
·
表面科学
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Shuai-Yu Wu,Kai-Zhen Yuan,Xiao-Feng Xu,Zhao-Jian Li,Zhen Zhang,Peng Wang,Yun-Ze Long,Hong-Di Zhang
Vacancy engineering is a highly efficient approach to enhancing photocatalytic activity. This research presents an innovative development of ZnO/NiO coaxial heterojunction nanofibers (ZN 1/1 ) and ZnO/NiO coaxial heterojunction nanofibers with engineered oxygen vacancies (OVs-ZN 1/1 ) via electrospinning and annealing. Detailed characterization of the nanofiber microstructure was conducted using scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The OVs-ZN 1/1 nanofibers demonstrated outstanding and unprecedented photocatalytic performance, achieving a 99 % degradation rate of Congo red dye (CR) under simulated solar light in just 45 min, with a good degradation coefficient of 0.091 min −1 . Remarkably, the nanofibers’ photocatalytic activity remained a high level even after five cycles. Moreover, the photocatalytic H 2 O 2 yield of OVs-ZN 1/1 increased 20 times as much as that of ZN 1/1 . Experiments and mechanism analysis indicate that oxygen vacancy, as the electron trapping site of photoexcitation, accelerates the charge separation and transfer at the interface, thus promoting the adsorption and activation of target molecules. This study highlights the novel and superior performance of photochemical catalysts achieved through the strategic incorporation of oxygen vacancies and heterojunctions.
研究领域:
材料科学
·
环境科学
·
化学工程
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Yunxu Yang,Xiaoxi Huang,Yong Shen Chua,Hooi Ling Lee
Fe–SnO 2 @NiO–NF removed 96.85% CIP within 150 min under solar light. • S-scheme heterojunction promotes charge separation and photocatalytic activity. • 3D NiO–NF support enables easy recovery and abundant active sites. • Over 94% degradation activity was retained after four cycles. • DFT and HPLC–MS reveal charge transfer and CIP degradation pathways. Photocatalysis is effective for antibiotic degradation but limited by poor charge separation and difficult recovery of powder catalysts. In this work, a macroscopic p–n heterojunction photocatalyst (Fe–SnO 2 @NiO–NF) was prepared on pre-oxidized nickel foam through in situ growth and microwave-assisted synthesis. XRD confirmed the coexistence of SnO 2 and NiO phases, while HRTEM and XPS analyses verified the successful construction of the Fe–SnO 2 /NiO heterojunction with intimate interfacial contact and interfacial electronic interaction. UV–vis DRS, PL, TRPL, EIS, and photoelectrochemical measurements demonstrated markedly improved light absorption, charge separation and transfer behavior, with a narrowed band gap of 2.92 eV and a prolonged average carrier lifetime of 1.2226 ns. Owing to the enhanced charge separation and the conductive 3D NiO–NF framework, Fe–SnO 2 @NiO–NF exhibited significantly improved photocatalytic activity for ciprofloxacin degradation under solar irradiation, reaching 96.85% removal within 150 min, while the immobilized catalyst could be readily separated from the aqueous solution. ESR and scavenging test identified •O 2 – and h + as the main reactive species, with •O 2 – playing the dominant role, while HPLC–MS revealed the degradation intermediates and pathways. Band structure analysis and DFT calculations demonstrated that the p–n heterojunction follows an S-scheme charge transfer mechanism, promoting efficient charge separation while preserving strong redox capability. The composite retained over 94% of its initial activity after four cycles, showing excellent stability and recyclability. This study provides a practical way to develop efficient and reusable photocatalysts for antibiotic wastewater treatment. Download: Download high-res image (182KB) Download: Download full-size image
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JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Jiongyue Hao,Chun Huang,Hangyu Liu,Wen Niu,Xuefeng Chen,Kazuki Nagashima,Zetao Zhu,Mati Horprathum,Fuguo Wang,Gang Meng,Di Peng,Maozhu Zhang,Rui Yang,Wei Hu,Xiangshu Miao,Yongcai Guo,Yong He
Artificial olfaction systems face a fundamental trade-off between device simplicity and discriminative capacity, particularly in detecting target gases within complex mixtures. While biological olfaction leverages dynamic sniffing strategies to enhance selectivity with limited receptors, conventional electronic noses rely on sensor arrays, increasing system complexity and power consumption. Here, we report a bio-inspired pseudo-breathing strategy coupled with a single SnSe/NiO heterojunction sensor to achieve highly selective H 2 S detection in mixed volatile sulfur compounds (VSCs) backgrounds. The heterojunction design creates enhanced surface activity and facilitates rapid charge carrier exchange, enabling fast and sensitive operation at room temperature. By implementing rhythmic adsorption-desorption cycles, we generate time-resolved spectral fingerprints that encode analyte-specific information. Combined with pattern recognition algorithms, this approach allows a single sensor to distinguish H 2 S from interfering VSCs in binary/ternary mixtures. This work demonstrates a paradigm for the classification of H 2 S-containing volatile sulfur compound (VSC) mixtures using an actively modulated single sensor, bridging materials innovation and dynamic sensing mechanisms to overcome the limitations of array-based systems.
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