JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2026
·
IF 4.6
Jinling Wu,Runmiao Chen,Pengjing Yin,Yuanzhen Zhou,Jieli Tang,Chengbin Du,Qi Xue
S-modified MnO 2 /Ni(OH) 2 hollow nanosheets were constructed for enhanced UOR. • Requires 1.30 V at 10 mA cm −2 and remains stable for 48 h. • MnO 2 phase transformation promotes the generation of Ni 3+ active species. • S-modification enhances urea adsorption while suppressing competitive OH − adsorption. The urea oxidation reaction (UOR) provides an alternative anodic process for electrochemical hydrogen generation, but developing catalysts with high activity and sustained performance remains challenging. In this study, we report an S-modified nickel-based catalyst with a hollow nanosheet architecture (α/γ-MnO 2 /Ni(OH) 2 -S), demonstrating enhanced UOR performance in alkaline media. α/γ-MnO 2 /Ni(OH) 2 -S attains a current density of 10 mA cm −2 at a potential of 1.30 V and maintains reliable durability for 48 h without significant degradation. The improved activity and durability are associated with the hollow nanosheet structure, the phase transformation of MnO 2 , and S-modification, which facilitate mass transport and charge transfer, modulate the electronic structure of Ni(OH) 2 to promote the formation of Ni 3+ active species, and enhance the electrochemical response to urea at different concentrations. This research establishes a practical avenue for constructing advanced nickel-based UOR catalysts through rational structural optimization, phase regulation, and surface modification. Download: Download high-res image (125KB) Download: Download full-size image
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CHINESE JOURNAL OF CATALYSIS
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2026
·
IF 17.2
Haifeng Fan,Di Xu,Ting Zeng,Guoqiang Hou,Yangyang Li,Siyi Huang,Yanfei Xu,Zheng Wang,Xinhua Gao,Xiang-Kui Gu,Mingyue Ding
CO 2 methanation technology has shown great application prospects in carbon neutrality and hydrogen storage due to its extremely high energy efficiency and potential economic benefits. It is highly desirable but challenging to design novel catalyst and achieve efficient and stable CO 2 methanation under mild conditions. Herein, we developed a highly active electron-enriched Y 2 O 3 /Ni catalyst, achieving a stable operation with ~80.1% CO 2 conversion and ~100% CH 4 selectivity for 400 h at 0.1 MPa and 220 °C, which was a 100 °C lower than the conventional supported Ni-based catalysts. Structural characterizations confirmed that the Y 2 O 3 /Ni catalyst maintained dynamic redox changes and formed electron-enriched Y 2 O 3– x -Ni interfaces under reaction conditions. Mechanism studies proved that the Y 2 O 3– x -Ni interfaces obviously lowered the energy barrier of *HCO dissociation, and shifted the rate-determining step from *HCO dissociation to *CO hydrogenation. Furthermore, profited by the moderate CO x adsorption ability and higher H 2 coverage at the Y 2 O 3– x -Ni interfaces, the *CO hydrogenation reaction was kinetically promoted. The above factors accounted for the excellent low-temperature CO 2 methanation activity of the Y 2 O 3 /Ni catalyst.
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Journal of Materials Chemistry A
·
2026
·
IF 9.2
Zhendian Li,Yuan Ha,Ziqi An,Xian Cao,Linzhuang Xing,Zhimin Li
Achieving exceptional electrocatalytic activity in conventional low-cost materials is of great significance but remains highly challenging. BaWO4 is recognized for its favorable stability and corrosion resistance in acidic/alkaline media, while intrinsically exhibiting limited activity for the electrocatalytic hydrogen evolution reaction (HER) due to its low electrical conductivity and insufficient active sites for optimal hydrogen adsorption/desorption kinetics. Herein, we report the successful activation of a BaWO4 ceramic as a binder-free HER self-catalytic electrode via atomic-level Ni doping. The incorporation of trace amounts of Ni effectively modulates the electronic structure and surface morphology of the BaWO4 self-catalytic ceramic, significantly enhancing charge transfer capability and exposing more catalytically active sites, thereby endowing it with improved intrinsic catalytic properties. As a result, the Ni-doped BaWO4 (Ni0.01-BaWO4) ceramic electrode delivers an outstanding HER performance with a low overpotential of 122 mV at 10 mA cm−2 in alkaline media, outperforming the undoped BaWO4 (287 mV), and retains good durability with negligible degradation over 500 hours of continuous operation. Combined experimental analyses and density functional theory (DFT) calculations reveal that Ni doping lowers the energy barrier for H2O dissociation by weakening H–OH adsorption and facilitating hydroxyl desorption, thereby improving overall HER kinetics. Notably, the catalyst exhibits superior structural integrity and long-term operational stability under harsh electrochemical and ultrasonic conditions. This work presents an effective approach to activate inert ceramic electrodes, achieving improved electrocatalytic activity and durability for practical HER applications.
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高影响因子
Materials
·
2026
·Vol. 19
·期 12
·2566
·
IF 3.7
Hongjie Li,Shaomu Wen,Yunqing Xia,Jizhong Yang,Chunyong Gu,Honglin Yang
HighlightsFabricate Ni-B/La2O3composite coatings by co-depositing nano-La2O3particles into an electroless Ni-B alloy matrix.The optimal concentration was determined to be 8 g·L−1, evidenced by the best anti-corrosion property.The results conclusively show that nano-La2O3reinforcement effectively enhances the corrosion resistance of electroless Ni-B alloy coatings.This study was conducted to explore how varying the concentration of nano-La2O3particles in the plating bath influences the morphology, constitution, and corrosion resistance of Ni-B composite coatings deposited on N80 carbon steel via electroless plating. The novelty of this work lies in the systematic investigation on the co-deposition behavior and grain refinement mechanism of nano-La2O3in electroless Ni-B system, which has been rarely reported in previous studies. The microstructure and chemical composition of the coatings were characterized through a combination of SEM, EDS, XPS and XRD analyses. SEM confirmed that a dense Ni-B/La2O3composite coating was formed, with a uniform thickness of approximately 10 μm, and the nano-La2O3particles were evenly distributed. XPS analysis verified the presence of B, C, O, Ni and La, while XRD analysis revealed a refinement in crystalline size due to the addition of the nanoparticles. The corrosion resistance enhancement mechanism is attributed to the triple synergistic effect: nano-La2O3pins grain boundaries and refines Ni-B grains to the minimum average size of 12.943 nm at the optimal concentration of 8 g·L−1; the refined grain structure promotes the formation of a continuous and dense Ni(OH)2passive film; the uniformly dispersed nanoparticles act as physical barriers to block the penetration of corrosive media. Electrochemical measurements demonstrated that this coating exhibited outstanding anti-corrosion performance, as confirmed by a remarkably positive corrosion potential (Ecorr= −0.37189 V) and a minimal corrosion current density (Icorr= 3.7524 μA/cm2). The results conclusively show that nano-La2O3reinforcement effectively enhances the corrosion protection performance of electroless Ni-B alloy coatings.
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PubMed
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2026
·Vol. 33
·期 5
·1461-1471
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IF 8.8
Wang Fan,Geng Mingxiang,Bao Anyang,Lü Yujie,Huang Pengru,Liu Dongming
LiBH 4 , a solid-state hydrogen storage material with ultra-high theoretical hydrogen capacity, is seriously hindered for the practical applications by its high thermodynamic stability and slow hydrogen desorption kinetics. Herein, the dehydrogenation properties of LiBH 4 are remarkably improved by confinement in the porous (Cu,Ni)/Cu 2 O heterostructure (np-(Cu,Ni)/Cu 2 O), which was achieved using a novel two-step method containing dealloying of Mg–Cu–Ni precursor alloy to form the porous (Cu,Ni) solid solution, followed by micro-oxidation under air conditions. Hydrogen release from the constructed LiBH 4 @np-(Cu,Ni)/Cu 2 O (1:2, mass ratio) system begins at approximately 80°C and ends before 380°C, with 12.5wt% of hydrogen desorbed. Moreover, the apparent dehydrogenation activation energy has been reduced to 44.2 kJ/mol. After rehydrogenation at 400°C under 8 MPa hydrogen pressure, the LiBH 4 @np-(Cu,Ni)/Cu 2 O (1:2, mass ratio) system can release 3.6wt% of hydrogen during the second dehydrogenation process. These findings show that the synergistic effect of confinement and heterostructure catalysis provided by the porous metal derivatives can greatly enhance the hydrogen storage properties of LiBH 4 .
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高影响因子
ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Honglin Yan,Yuan Ha,Yuan Wang,Lu Li,Chaoyi Zhou,Qianxin Xiang,Zhimin Li
Ni-rich LiNi1–xMnxO2 (NM, x ≤ 0.4) cathodes with high Mn levels have garnered particular attention due to their cost-effectiveness and enhanced safety for lithium-ion batteries, yet their cycling performance remains unsatisfactory. Herein, we investigate the relationship among structure characteristics, cycling performance, and Mn content, revealing that the cycling performance of NM cathodes is associated with Mn-level controlled cation ordering within their structures. Specifically, except for the inherent Li+/Ni2+ disorder, higher Mn levels in NM cathodes tend to disrupt the Ni2+/Mn4+ ordering, resulting in phase segregation and the formation of Mn-enriched regions with Mn3+/Mn3+ pairs. Distorted [Mn3+O6] octahedra, weak interactions between Mn3+ ions, and Mn3+ dissolution in the Mn-enriched regions are detrimental to the structural stability of NM cathodes, thus leading to inferior cycling performance. This study provides a profound understanding of Mn roles in Co-free Ni-rich cathodes and highlights the significance of maintaining cation ordering to achieve high-performance NM cathodes.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Xia Wei,Pengcheng Huan,Xiaming Chen,Guang Ji,Song Li
The interfacial electron interactions in heterogeneous catalysts are critical determinants of their catalytic efficiency. In this study, a Ni-Co alloy coating with a precisely controlled Ni/Co of 6:4 was synthesized on nickel foam (denoted as Ni-Co-6–4/NF) using NaH 2 PO 2 as a reducing agent. The resulting surface exhibited negligible phosphorus incorporation. The Ni-Co-6–4 coating featured a unique crystalline-amorphous interfacial structure. As expected, Ni-Co-6–4/NF demonstrated outstanding catalytic activity toward hydrazine oxidation, achieving a current density of 169.1 mA·cm −2 at 0.3 V versus the reversible hydrogen electrode (RHE) without i R compensation. Moreover, it maintained 100 % of its catalytic performance over 24 h of continuous electrolysis, placing it among the most durable non-noble Ni-based electrocatalysts reported for hydrazine oxidation. Density functional theory (DFT) calculations revealed that this improved performance stems from electron redistribution at the crystalline-amorphous interface, which enhances N 2 H 4 adsorption. These findings highlight the effectiveness of crystalline-amorphous interface engineering as a powerful strategy for the rational design and optimization of high-performance electrocatalysts.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Bao Liu,Yi Li,Pengcheng Ding,Dan Li,Jiwei Li,Xuanwei Zhao,Jia Zu,Maoyu Wang,Ye Sun,Miao Yu
Developing efficient bifunctional electrocatalysts for water splitting remains challenging due to the antagonistic demands of oxygen and hydrogen evolution reactions (OER/HER). Herein, we present a ternary heterointerface non-precious catalyst, Ni/WC-Mo 2 C, for bidirectional HER and OER optimization. Combining in situ characterization and theoretical calculations, we demonstrate how this design overcomes conventional Schottky junction limitations: (i) The band gradient of the WC-Mo 2 C semiconductor heterojunction synergizes with metallic Ni's electron-donating properties to construct an "electron staircase" channel to enhance charge transfer while increasing active electron density and lowering the d -band center; and (ii) ternary interface-induced lattice strain buffering and localized electron redistribution stabilize high-valent Ni species and optimize intermediate adsorption/desorption energetics. This synergy resolves the OER-HER electronic conflict, endowing the catalyst with ultralow overpotentials of merely 26 mV for HER and 153 mV for OER at a current density of 10 mA cm −2 in 1.0 M KOH electrolyte. The assembled electrolyzer delivers a high current density of 1000 mA cm −2 at a low cell voltage of 1.73 V and sustains stable overall water splitting operation for an extended duration of 1200 h, outperforming noble-metal benchmarks (Pt/C||RuO 2 ). This work establishes a new paradigm for non-precious bifunctional electrocatalyst design through multicomponent heterointerface engineering.
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高影响因子
AICHE JOURNAL
·
2026
·
IF 4
Xiaohu Ge,Ping Hu,Yueqiang Cao,Hao Jiang,Jing Zhang,Gang Qian,Xinggui Zhou,De Chen,Xuezhi Duan
Selective hydrogenation of propyne is essential for producing polymer-grade propylene, yet achieving high selectivity with non-precious metal catalysts remains challenging. Here, we report a structurally ordered Ni 3 Sn 2 intermetallic catalyst synthesized via topological transformation of NiSn(OH) 6 @Ni/Mg/Al layered double hydroxides. Structural characterization using X-ray diffraction, high-resolution transmission electron microscopy, and X-ray absorption spectroscopy confirms the formation of the hexagonal Ni 3 Sn 2 intermetallic phase, featuring atomically ordered and electronically modulated Ni 1 Sn 2 ensemble sites. The catalyst delivers 98.50% propylene selectivity at near-complete propyne conversion, markedly outperforming the Ni, Ni 3 Sn, and Ni 3 Sn 4 reference catalysts. Mechanistic insights from temperature-programmed surface reactions and density functional theory calculations elucidate that the superior performance arises from moderate σ-type propyne adsorption and kinetically favored propylene desorption on Ni 1 Sn 2 ensemble sites. This work demonstrates a rational intermetallic design strategy for developing high-performance, non-noble metal catalysts through precise control of active site geometry and electronic structure.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 5.6
Wenhao Li,Zhigao Ma,Liping Pan,Jianfei Xu,Cuiliu Han,Shifeng Luo,Jiuxing Zhang,Jingwen Zhang,Yan Wang
The effect of Ni addition on the spark plasma sintering (SPS) densification and properties of LaB 6 is investigated in this study. The results show that the Ni addition not only facilitates the SPS densification of LaB 6 but also enhances its mechanical and thermionic emission properties. Under the conditions of 1800 °C sintering temperature, 50 MPa applied pressure, and 5 min holding time, the LaB 6 -2wt%Ni sample achieves a relative density of 97.5 %, while the pure LaB 6 bulk only reaches 83.4 %. Microstructural analysis reveals that the LaB 6 -2wt%Ni sample has a two-phase microstructure, with the NiB secondary phase mainly distributed along the grain boundaries of the LaB 6 matrix, and the average grain size of LaB 6 grains is 10.11 ± 6.30 μm. The effects of crack deflection and bridge induced by Ni addition enable the LaB 6 -2wt%Ni sample to exhibit an indentation fracture toughness of 1.14 ± 0.04 MPa m 1/2 , nearly twice that of 0.59 ± 0.05 MPa m 1/2 for the SPSed LaB 6 bulk with the same density. At the operating temperature of 1600 °C, the LaB 6 -2wt%Ni sample exhibits a slightly higher thermionic emission current density and lower effective work function compared to the dense LaB 6 bulk. This study provides a novel strategy for the fabrication of dense LaB 6 , and the LaB 6 -Ni composite shows great potential as a thermionic cathode material.
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高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2016
·Vol. 74
·期 3
·639-646
·
IF 1.064
Zhang Zhen,Zhang Junya,Ye Xiaokun,Hu Yongyou,Chen Yuancai
Ethylenediaminetetraacetic acid (EDTA) forms stable complexes with toxic metals such as nickel due to its strong chelation. The electro-Fenton (EF) process using a cathode made from palladium (Pd), reduced graphene oxide (RGO) and carbon felt, fed with air, exhibited high activities and stability for the removal of 10 mg L −1 EDTA-Ni solution. Pd/RGO catalyst was prepared by one-pot synthesis; the scanning electron microscopy and X-ray diffraction analysis indicated nanoparticles and RGO were well distributed on carbon felt, forming three dimensional architecture with both large macropores and a mesoporous structure. The cyclic voltammetric results showed that the presence of RGO in Pd/RGO/carbon felt significantly increased the current response of two-electron reduction of O 2 (0.45 V). The key factors influencing the removal efficiency of EDTA-Ni, such as pH, current and Fe 2+ concentration, were investigated. Under the optimum conditions, the removal efficiency of EDTA-Ni reached 83.8% after 100 min EF treatment. Mechanism analysis indicated that the introduction of RGO in Pd/RGO/carbon felt significantly enhanced the electrocatalytic activities by inducing •OH in the EF process; direct H 2 O 2 oxidation still accounted for a large amount of EDTA-Ni removal efficiency.
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高影响因子
Materials
·
2018
·Vol. 11
·期 8
·1323
·
IF 2.467
Yanlin Pan,Daoping Xiang,Ning Wang,Hui Li,Zhishuai Fan
Fine-grained W-6Ni-4Mn alloys were fabricated by spark plasma sintering (SPS) using mechanical milling W, Ni and Mn composite powders. The relative density of W-6Ni-4Mn alloy increases from 71.56% to 99.60% when it is sintered at a low temperature range of 1000–1200 °C for 3 min. The spark plasma sintering process of the alloy can be divided into three stages, which clarify the densification process of powder compacts. As the sintering temperature increases, the average W grain size increases but remains at less than 7 µm and the distribution of the binding phase is uniform. Transmission electron microscopy (TEM) observation reveals that the W-6Ni-4Mn alloy consists of the tungsten phase and the γ-(Ni, Mn, W) binding phase. As the sintering temperature increases, the Rockwell hardness and bending strength of alloys initially increases and then decreases. The optimum comprehensive hardness and bending strength of the alloy are obtained at 1150 °C. The main fracture mode of the alloys is W/W interface fracture.
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高影响因子
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