JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Shuang Wu,Zheni Wang,Lei Wan,Chenghui Luo,Shams Ali Baig,Xinhua Xu
In the present study, Pd/Ni foam electrode was prepared by improved impregnation method for electrocatalytic hydrodechlorination (ECH) of clofibric acid (CA). The effects of complexing agent addition into the impregnation solution for the formation of Ni(OH) 2 and the ECH activity of Pd/Ni foam electrode were investigated. Results revealed that the introduction of sodium acetate (the complexing agent) greatly enhanced the ECH activity as compared to common impregnation liquid. Characterizations analyses demonstrated that the addition of sodium acetate did not change the phase of the electrode’s surface, but effectively reduced the deposition of Ni(OH) 2 . The surface morphology of the electrode was changed simultaneously by the addition of sodium acetate and the interlacing structure of Ni(OH) 2 and Pd catalyst was formed. NaAc before -Pd/Ni and NaAc after -Pd/Ni foam electrodes were used to perform ECH experiments on CA, and the combined Pd/Ni foam 15 min electrode was compared with the Pd/Ni foam 6 h electrode. After 2 h of electrolysis, the NaAc after -Pd/Ni foam electrode was found to remove the CA (∼100%) in the solution, which was 1.3 times the removal rate of the Pd/Ni foam 6 h electrode to CA and exceeded the Pd/Ni foam 15 min electrode. Findings from the present study demonstrated that adding the complexing agent into the impregnation solution can improve the ECH activity of Pd/Ni foam electrode and achieve a faster and more efficient dechlorination effect of CA.
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高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 25
·13308-13316
·
IF 7.443
Bin Yang,Lei Yu,Huijun Yan,Yanbo Sun,Qi Liu,Jingyuan Liu,Dalei Song,Songxia Hu,Yi Yuan,Lianhe Liu,Jun Wang
Pseudocapacitor electrode materials, such as transition metal oxides/sulfides, have been extensively investigated and shown to have fast energy storage properties, but their low rate performance and poor cycle stability are serious problems in practical applications. We present here a design for the architecture of these electrode materials with the aim of improving the rate performance and cycle stability of pseudocapacitors by using an interface ion-exchange method. Precursor materials obtained by a hydrothermal reaction were soaked in aqueous NaHS solution to synthesize the urchin-like core–shell structure of NiCo2(CO3)1.5(OH)3@NiCo2S4. Such core–shell nanostructure electrode materials can make full use of both components with synergistic effects. Excellent results were obtained with a capacitance of 956.4 F g−1 at a current density of 4 A g−1 in the three-electrode system and an actual energy density of 32.3 W h kg−1 and power density of 1835 W kg−1 in the asymmetrical supercapacitor.
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.9
Mingao Li,Qianqian Zhang,Wenqing Xue,Fen Guo,Yongsheng Tian,Lan Yuan,Jikun Xu,Li Guo,Daniel John Blackwood,Xiaolei Huang,Yang Gui,Baoan Fan
Developing cost-effective, robust oxygen evolution reaction (OER) catalysts for water electrolysis under harsh conditions remains challenging. Here, we report a one-step scalable synthesis of monolithic hierarchical FeCoNi (oxy)hydroxide nanotubes on Ni foam (H-FCNO(OH)@NF). This integrated electrode achieves exceptional OER robustness across a wide-temperature range (25-90 °C) and concentrated alkaline electrolytes (5–30 wt% KOH), delivering a low overpotential of 310 mV at 100 mA cm −2 and maintaining > 12 h stability at 100 mA cm −2 . Mechanistic studies reveal that Fe 3+ /thiourea co-mediates nanotube formation, while Co dopant-driven crystallization directs vertical nanosheet assembly. A full characterization on the catalyst after activation confirms preserved nanotube morphology, directly correlating structural integrity with catalytic durability. This work provides a facile, scalable route toward industrial-compatible OER electrodes for sustainable hydrogen production.
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高影响因子
Journal of Environmental Chemical Engineering
·
2023
·Vol. 11
·期 6
·111477
·
IF 7.7
Siyi Zhou,Fang Zhu,Hao Cheng,Sridhar Komarneni,Jianfeng Ma
In this study, Ni 3 S 2 @Mo 2 S 3 composites were grown on the surface of molybdenum-nickel (Mo-Ni) foam in situ by a one-step hydrothermal method . With p-nitrophenol (PNP) as the target pollutant, the catalyst can produce a good synergistic effect with ozone, and the degradation rate of PNP is more than 96%. Even after five cycles, Ni 3 S 2 @Mo 2 S 3 -NF/O 3 was able to degrade PNP efficiently and stably. In addition, the unique three-dimensional structure of Ni 3 S 2 @Mo 2 S 3 -NF solves the separation and recycling problem of traditional powder catalysts by maintaining the structural stability during the use process and thus, may reduce the cost of water treatment. The degradation process is mainly dominated by non-radical pathways, and the radical pathway, which work synergistically. This work reveals the influencing factors and degradation mechanism of Ni 3 S 2 @Mo 2 S 3 -NF/O 3 system for PNP degradation, which provides a new idea for water treatment and broadens its potential application.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Jin Kong,Shenyang Jiang,Chunde Bian,Honglei Chen,Zhe Lv,Shuo Wang,Zhihong Wang
Nickel‑iron layered double hydroxides (NiFe-LDH) have been recognized as a promising oxygen evolution reaction (OER) electrode, but their practical fabrication is bottlenecked by harsh synthesis conditions and the poor scalability of existing strategies. Herein, we address these challenges via a room-temperature and scalable route to fabricate self-supported NiFe-LDH on nanoporous Ni foam (NPNF) by utilizing the intrinsic self-activation effect of NPNF in the hydrolysis reaction of NaBH 4 . The NPNF is prepared through a gaseous oxidation-reduction approach for commercial Ni foam, serving as a highly active and scalable substrate for NiFe-LDH growth. The nanopores within the NPNF significantly increase the nucleation sites for NiFe-LDH. Furthermore, experimental characterizations combined with density functional theory calculations demonstrate that the high concentration of Ni vacancies of NPNF enhances the adsorption of H 2 O and *BH 4 , thereby accelerating the hydrolysis of NaBH 4 . The localized microenvironment established by the rapid hydrolysis favors the in-situ nucleation and growth of NiFe-LDH. Consequently, the designed NiFe-LDH/NPNF electrode demonstrates exceptional OER performance, exhibiting a low overpotential of 270 mV at 100 mA cm −2 and excellent durability of over 2200 h. Combined with its feasibility for large-area fabrication (>1000 cm 2 ), this electrode holds practical potential for application as an industrial electrode in alkaline water electrolysis. This work reports a scalable and industrially compatible strategy for in situ self-activation growth of self-supported NiFe-LDH on nanoporous Ni foam under ambient conditions, which delivers outstanding long-term durability exceeding 2200 h for the oxygen evolution reaction. Download: Download high-res image (104KB) Download: Download full-size image
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Fuguang Liu,Zhonghan Feng,Xinyue Zhang,Liang Cui,Jingquan Liu
The creation of inexpensive, high-performance catalysts to reduce the overpotential of the oxygen evolution reaction (OER) process is critical for the electrolysis of water for hydrogen production. Therefore, we applied a one-step hydrothermal method using cation exchange reaction (CER) to prepare Fe-doped and interfacial Ru nanoclusters co-engineered Ni(OH) 2 nanosheets directly grafted on Ni foam (Ru@Fe-Ni(OH) 2 /NF) for OER process. Results of electrochemical tests reveal that Ru@Fe-Ni(OH) 2 /NF has excellent OER activity, and its overpotential (η) is only 266.4 mV when the current density is 50 mA cm −2 in 1 M KOH solution, even lower than that of commercial OER catalyst RuO 2 (355 mV). The Tafel slope also decreases from 133.8 mV dec −1 for pristine Ni(OH) 2 /NF material to 24.1 mV dec −1 for Ru@Fe-Ni(OH) 2 /NF, indicating the higher charge transfer rates and fastest kinetics for water oxidation. At an overpotential of 300 mV the optimal turnover frequency (TOF) of 0.062 s −1 for Ru@Fe-Ni(OH) 2 /NF is achieved compared to that of Ni(OH) 2 /NF (0.014 s −1 , NN), demonstrating the fast reaction kinetics of the as-prepared electrocatcalyst. After 24 h stability test, the catalytic activity of Ru@Fe-Ni(OH) 2 /NF was only attenuated by 2 %, showing excellent OER stability and durability. Our results show that we have successfully developed an efficient OER catalyst for green and efficient electrocatalytic hydrolysis to produce H 2 and O 2 , providing a promising method for clean H 2 production.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Bowen Lu,Yanhui Wang,Wei Li,Shiwei Song,Pengfei Tian,Rushuo Li,Xueqing Tian,Xiangyu Liu,Jianbing Zang
The development of self-supporting electrodes that exhibited both high efficiency and good durability remained a challenge in the field of hydrogen energy utilisation. Here, we designed a self-supporting 3D hierarchical porous electrode by filling carbon nanotubes (CNTs) loaded with Ni–P alloy into the framework of nickel foam (NF). Firstly, CNTs were decorated with a catalytically active Ni–P alloy via electroless plating (Ni–P@CNTs). Then, the Ni–P@CNTs were filled and anchored onto the framework of NF via electroplating to synthesise a self-supporting electrode (Ni–P@CNTs/NF). The Ni–P@CNTs/NF exhibited an excellent catalytic performance toward the hydrogen evolution reaction (HER) in 1 M KOH electrolyte, with an overpotential of 53 mV at 10 mA cm −2 , a small Tafel slope of 101.56 mV dec −1 and excellent long-term durability. This facile and effective strategy might provide a new path to the design of self-supporting electrodes with enhanced HER catalytic.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2019
·
IF 3.355
Xiaofeng Hu,Jisong Hu,Qingqi Peng,Xinguo Ma,Shijie Dong,Huihu Wang
In this work, a special hybrid structure with 2D configuration comprising of g-C 3 N 4 , reduced graphene oxide (RGO), and BiOI (g-C 3 N 4 /BiOI/RGO) was rationally constructed and immobilized on Ni foam with RGO functioned as electron transfer mediator and binder. The immobilized 2D g-C 3 N 4 /BiOI/RGO hybrid structure exhibited the enhanced photocatalytic CO 2 reduction to CO and the methyl orange (MO) degradation efficiency under visible light irradiation. Particularly, the hybrid heterojunction with a mass ratio 6% of BiOI to g-C 3 N 4 displayed the highest CO yield and degradation rate constant for MO, which was 1.6 times and 3 times of g-C 3 N 4 /RGO binary heterojunction immobilized on Ni foam. The enhanced photocatalytic activity was ascribed to the rapid charge separation. More importantly, combined with the theoretical calculations on the work functions of g-C 3 N 4 , rGO and BiOI, the experimental results clarified the charges transfer route of g-C 3 N 4 /BiOI/RGO heterojunction conforming to the Z-scheme mechanism.
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高影响因子
Nanoscale
·
2023
·Vol. 15
·期 34
·14068-14080
·
IF 6.7
Yixiang Pan,Xiaoyan Wang,Hua Lin,Qinghua Xia,Maoxiang Jing,Weiyong Yuan,Chang Ming Li
Earth abundant transition metal oxide (EATMO)-based bifunctional catalysts for overall water splitting are highly desirable, but their performance is far from satisfactory due to low intrinsic activities of EATMOs toward electrocatalysis of both oxygen and hydrogen evolution reactions and poor electron transfer and transport capabilities. A three-dimensional (3-D) Ni-foam-supported NiCoO2@Co3O4 nanowire-on-nanosheet heterostructured array with rich oxygen vacancies has been synthesized, showing OER activity superior to most reported catalysts and even much higher than Ru and Ir-based ones and HER activity among the highest reported for non-noble-metal-based catalysts. The excellent activities are ascribed to the highly dense, ultrathin nanowire arrays epitaxially grown on an interconnected layered nanosheet array greatly facilitating electron transfer and providing numerous electrochemically accessible active sites and the high content of oxygen vacancies on nanowires greatly promoting OER and HER. When adopted as bifunctional electrodes for overall water splitting, this heterostructure shows an overvoltage (at 10 mA cm−2) lower than most reported electrolyzers and high stability. This work not only creates a 3-D EATMO-based integrated heterostructure as a low-cost, highly efficient bifunctional catalytic electrode for water splitting, but also provides a novel strategy to use unique heteronanostructures with rich surface defects for synergistically enhancing electrocatalytic activities.
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Kanagaraj Rajalakshmi,Johnbosco Yesuraj,Selvaraj Muthusamy,N. Clament Sagaya Selvam,Yun Sik Nam,Kibum Kim,Yuanguo Xu
In recent times, transition-metal oxides have been recognized as highly promising candidates for supercapacitor applications. Nevertheless, their progress in diverse fields has been hindered by challenges such as poor electrical conductivity and a shortage of active reaction centers. Doping heteroatoms would overcome these drawbacks and enhance the supercapacitor properties in transition metal oxides. Herein, the phosphorous-doped 2D nanosheet assembled 3D Mn 2 V 2 O 7 micro flowers were grown on the Nickel foam using the hydrothermal method and successively phosphatized in a tube furnace, which was utilized as a binder-free supercapacitor electrode. The synthesis process involved varying the concentration of phosphorus (P), resulting in the successful formation of uniform P-decorated Mn 2 V 2 O 7 microflowers. The unique microflower structure and doping P into the Mn 2 V 2 O 7 material enhance the electrochemical properties with a specific capacity of 850C g −1 (1545 F g −1 ) at 1 A g −1 in a three-electrode cell. Moreover, the assembled Mn 2 V 2 O 7 –600/NF//AC device delivers a specific capacity of 258C g −1 (211 F g −1 ) at 1 A g −1 with a remarkable rate of 47 % at a high current density of 20 Ag −1 . The device achieved a maximum energy density of 43.2 Wh kg −1 at a power density of 604.7 W kg −1 , and it maintained 91 % of initial capacity after 10,000 charge/discharge cycles at 20 A g −1 . These results suggest that the P-doping 2D nanosheet assembled 3D Mn 2 V 2 O 7 could be promising electrode materials for supercapacitor applications.
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高影响因子
ANALYST
·
2024
·Vol. 149
·期 10
·2905-2914
·
IF 3.6
Hongming Hou,Yifan Liu,Xianglong Li,Wenbo Liu,Xiaoli Gong
High cost, inherent destabilization, and intricate fixing of enzyme molecules are the main drawbacks of enzyme-based creatinine sensors. The design of a low-cost, stabilizable, and enzyme-free creatinine sensing probe is essential to address these limitations. In this work, an integrated three-dimensional (3D) free-standing electrode was designed to serve as a non-enzymatic creatinine sensing platform and was fabricated by rapid electrodeposition of a dense copper nanoparticle film on nickel foam (Cu NP film/NF). This low-cost, stable, easy-to-fabricate, and binder-free Cu NP film/NF electrode has abundant active sites and excellent electrochemical performance. Cyclic voltammetry measurements show a wide linear range (0.25–24 mM), low detection limit (0.17 mM), and high sensitivity (306 μA mM−1 cm−2). The developed sensor shows high recovery of creatinine concentration in real urine. Besides, it has better specificity, reproducibility, and robustness in detecting creatinine. These excellent results suggest that a non-enzymatic creatinine sensor based on an integrated 3D free-standing Cu NP film/NF electrode has good potential for non-invasive detection of urinary creatinine.
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高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Daosong Zha,Yongsheng Fu,Lili Zhang,Junwu Zhu,Xin Wang
Nickel cobalt sulfides (NiCo-S) are promising electrode materials for high-performance supercapacitors but normally show poor rate capability and unsatisfactory long-term endurance. To overcome these disadvantages, a properly constructed electrode architecture with abundant electron transport channels, excellent electronic conductivity and robust structural stability is required. Herein, considering that in situ transformation can mostly retain the specific structural advantages of the precursors, a two-step strategy is purposefully developed to construct a binder-free electrode composed of interconnected NiCo-S nanosheets on Ni foam (NiCo-S/NF), in which NiCo-S/NF is synthesized via the in situ sulfuration of networked acetate anion-intercalated nickel cobalt layered double hydroxide nanosheets loaded on Ni foam (A-NiCo-LDH/NF). Noticeably, the optimized Ni 1 Co 1 -S/NF exhibits an ultrahigh specific capacitance of 2553.9 F g −1 at 0.5 A g −1 , excellent rate capability (1898.1 F g −1 at 50 A g −1 ) and superior cycling stability (nearly 90% capacitance retention after 10,000 cycles). Furthermore, the assembled asymmetric supercapacitor based on Ni 1 Co 1 -S/NF demonstrates a high energy density of 58.1 Wh kg −1 at a power density of 796 W kg −1 and impressive long-term durability even after a repeated charge/discharge process as long as 70,000 cycles (∼92% capacitance retention). The attractive properties endow the Ni 1 Co 1 -S/NF electrode with significant potential for high-performance energy storage devices.
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高影响因子
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