CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xue Zhao,Zhu Zhu,Yingnan He,Haibo Zhang,Xiaohai Zhou,Wanbiao Hu,Meng Li,Shusheng Zhang,Yemin Dong,Xun Hu,Artem V. Kuklin,Glib V. Baryshnikov,Hans Ågren,Thomas Wågberg,Guangzhi Hu
Electrochemical synthesis of ammonia driven by clean energy is expected to realize the supply of ammonia for distributed production of industry and agriculture. Here, nickel nanoparticles and nickel in the form of single atoms were simultaneously anchored on the electrochemically active carrier BCN matrix through a structured domain strategy, which realized a high-efficiency, high-value-added, conversion of nitrate in sewage. Specifically, the electrochemical nitrate reduction reaction (NIRR) driven by BCN@Ni in alkaline media achieves an ammonia yield rate as high as 2320.2 μg h −1 cm −2 (at −0.5 V vs RHE), and Faraday efficiency as high as 91.15% (at −0.3 V vs RHE). Even in neutral and acidic media, the ammonia yield rates of NIRR driven by BCN@Ni are as high as 1904.2 μg h −1 cm −2 and 2057.4 μg h −1 cm −2 , respectively (at −0.4 V vs RHE). The 15 NO 3 - isotope labeling experiment verified that the recorded ammonia all came from the electrochemical reduction of NO 3 – on BCN@Ni. Density functional theory (DFT) calculations show that both nano-Ni and single-atom Ni in BCN@Ni have the ability to electrochemically convert NO 3 – into NH 3 , and that the addition of BCN can further promote the NIRR on Ni.
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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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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
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IF 9.9
Zhi-Qiang Hou,Wen-Ping Hu,Guo-Hua Yang,Zi-Xuan Zhang,Tian-Yi Cheng,Ke-Jing Huang
The production of high-purity hydrogen using surplus electrical energy and abundant water resources has immense potential in mitigating the fossil energy crisis, as hydrogen fuel holds clean, pollution-free, and high-energy characteristics. However, the practical application of large-scale hydrogen production from water faces challenges such as high overpotentials, sluggish dynamics, and limited electrocatalytic lifetime associated with the hydrogen evolution reaction (HER). Here, we fabricated the sandwich structure of a Ni/Fe 3 O 4 @poly(3,4-ethylene-dioxythiophene)/Ni (Ni/Fe 3 O 4 @PEDOT/Ni) electrode and employed a strong magnet to obtain a magnetic electrode capable of achieving high-activity and durability for HER. Electrochemical analysis reveals that the activated magnetic electrode displays a significantly reduced overpotential and an extended electrocatalytic lifetime of 10 days. Notably, its stability is higher than that of non-magnetic Ni/Fe 3 O 4 /Ni and Ni/Fe 3 O 4 @PEDOT/Ni electrodes, primarily due to the support from magnetic force and the protective PEDOT layer. Moreover, the minute atomized droplets can form the H 2 O 2 species in a moist environment, facilitating the formation of the NiO layer on the Ni surface, which plays a vital role in boosting catalytic activity. In conclusion, our magnetic electrode strategy, combined with the emergence of the NiO layer, offers valuable insights for the development of advanced HER electrodes.
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高影响因子
JOURNAL OF CATALYSIS
·
2023
·
IF 7.3
Dongdong Yan,Junbo Feng,Shuo Li,Yufei Yang,Xi Yang,Xiaofei Shi,Meng LI,Yadong Zhang
A bimetallic Ni-Pt catalyst (6Ni-Pt-HMS) was designed for the dehydrogenation of 1,2-cyclohexanediol (CHD) to catechol. The hexagonal mesoporous silica (HMS) as support, loaded with platinum and nickel by one-pot and incipient-wetness impregnation method, respectively. [Ni(en) 3 ](NO 3 ) 2 is used as the precursor of nickel. The physi-cochemical properties of the catalysts were examined by XRD, BET, SEM and TEM techniques. The effect of ethylenediamine on nickel dispersion during impregnation was studied by comparing with the traditional precursor (nickel nitrate). FTIR and TGA results showed that the presence of ethylenediamine modifies the behavior of nickel during impregnation and calcination . The activity and stability of the catalysts were evaluated on a fixed-bed, revealing the influence of mesoporous structure, ethylenediamine, and platinum on reaction. The 6Ni-Pt-HMS catalyst, with the conversion of CHD is 100 %, the selectivity of catechol as high as 99.7 % with the liquid hourly space velocity (LHSV) is 9 h −1 , and a long-term stability. The deactivation mechanism of the spent catalyst was analyzed by BET, TGA, SEM, TEM-EDX and ICP-OES.
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ACS Catalysis
·
2025
·
IF 13.1
Shengpeng Mo,Shuangde Li,Jiangjing Zhou,Xin Zhao,Huimin Zhao,Xiaobin Zhou,Yinming Fan,Zongqiang Zhu,Bing Li,Qinglin Xie,Wenzhe Si,Yunfa Chen,Daiqi Ye,Junhua Li
A concentrated solar reaction device has been designed for the solar-driven photothermal CO2 reverse water–gas shift reaction, in which solar-to-chemical conversion efficiency would be up to 26% via a concentrated solar panel. Meanwhile, a special photothermal Ni–C–In catalyst (Ni/C–In2O3) with interstitial C, the In3Ni2 intermetallic compound, and disordered Ni clusters has been synthesized. As a result, the SO2-tolerant Ni/C–In2O3 catalyst exhibits an outstanding solar-driven photothermal catalytic performance (near thermodynamic limitation) with 100% CO selectivity and a 20.96 mmol gcat–1 h–1 CO production rate for solar-driven CO2 hydrogenation under concentrated solar irradiation (around 1521.9 mW/cm2) even sunlight without external heating. The incorporation of interstitial C and exposed Ni clusters in the Ni–C–In intermetallic catalyst could strengthen intensive solar light absorption. Moreover, quasi in situ XPS and DFT theoretical calculation results validate that asymmetric interaction between interstitial C and the Ni-cluster not only effectually regulates the electronic structure of the Ni–C–In intermetallic catalyst but also greatly optimizes the activation of H2 and CO2 molecules and the energy barriers of key reaction dynamics (HCOO* formation and dehydrogenation) in the RWGS reaction. Accordingly, this study provides a promising strategy for the electronic structure modification of photothermal functional catalysts with C modification to boost CO2 hydrogenation, putting forward an important step toward practical solar-to-fuel production with concentrated natural sunlight.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xiaoshuang Zhou,Bing Chen,Wei Wang,Liang Liu,Xiankai Li,Long Chen,Yanhui Li,Yanzhi Xia,Lijie Ci
The increasing requirements for wearable and portable electronics are driving the interests of high performance fiber supercapacitor. Layered double hydroxide (LDH) is broadly used in electrode materials, owing to the adjustability of components and the unique lamellar structure. However, limited active sites and poor electrical conductivity hinder its applications. Herein, the core–shell heterostructured Ni(OH) 2 @activation Zn-Co-Ni layered double hydroxides (Ni(OH) 2 @A-ZnCoNi-LDH) electrode was fabricated by loading pseudocapacitance material on the A-ZnCoNi-LDH to improve the electrochemical performance. Significantly, benefits from the synergistic effect of the multi-metal ions and the core–shell heterostructure, the electrodes demonstrated a capacitance of 2405 mF·cm −2 at 1 mA·cm −2 . Furthermore, Ni(OH) 2 @A-ZnCoNi-LDH was used as the core electrode and carbon nanotube (CNT) film coated with Fe 2 O 3 @reduced graphene oxide (rGO) was wrapped around the core electrode to assemble coaxial fiber asymmetric supercapacitor, which illustrated an ultrahigh energy density of 177.7 µWh·cm −2 at 0.75 mW·cm −2 . In particular, after consecutive charging and discharging 7000 cycles, the capacitance retention of the device was 95 %, indicating the excellent cycling stability. Furthermore, the device with high flexibility can be woven into textiles in different shapes. The fabricated device has an excellent development prospect as an energy source in wearable electronic devices.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhuwei Yang,Linsen Li,Xiao Yang,Hui Xiong,Riguang Zhang,Zhao Jiang
In this study, a series of Ni-CeO 2 /TS-1 (Titanium Silicalite-1) catalysts were synthesized for dry reforming of methane (DRM). Among them, 5Ni-10CeO 2 /TS-1 exhibited the highest catalytic performance with 89 % CH 4 and 93 % CO 2 conversions, 4.81 mol CH4 ·g Ni -1 ·h −1 and 4.99 mol CO2 ·g Ni -1 ·h −1 specific activities, 95.5 % H 2 /CO ratio after 50 h, accompanied by the good stability with 2.9 % CH 4 and 2.3 % CO 2 activity loss within 100 h. Combined with various characterizations, the structure–function relationship was also investigated. For the physical and morphological analysis, it was indicated that the appropriate CeO 2 content could effectively diminish, disperse the Ni nanoparticles, and maintain MFI backbone structure. For the electronic structure, the introduced CeO 2 could improve the amount and strength of the surface Ni-O-X (Ti or Ce) species by changing the interaction among Ni nanoparticles, TS-1 and CeO 2 . It led to more Ni nanoparticles in stronger electron-deficient state, as well as more medium-strength basic sites, favoring for the activation of CH 4 and CO 2 . However, Ni nanoparticles would be covered when excessive CeO 2 was introduced, preventing the exposure of the active sites. Therefore, only the suitable CeO 2 in the catalysts could significantly improve catalytic performance for DRM with long-term stability. Furthermore, the good anti-sintering and anti-coking properties of 5Ni-10CeO 2 /TS-1 were mainly dependent on the optimal amount of surface Ni-O-X species with high strength. In-situ DRIFTS (diffuse reflectance infrared spectroscopy) analysis demonstrated that the introduced CeO 2 could help catalyst favor for activating CH 4 and CO 2 molecules, and inhibiting the CH 4 overcracking and carbon accumulation, confirmed by the long-term measurement and structure analysis of spent catalysts.
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NANOTECHNOLOGY
·
2021
·Vol. 32
·期 34
·345702
·
IF 3.874
Yuqiang Zhang,Yan Wang,Jiahui Zhu,Xubin Zhang,Wangfeng Cai
A flower-like structured electrode material of Co3O4@Ni–Co layered double hydroxide (LDH) grown on Ni foam (Co3O4@Ni–Co LDH/NF) was prepared via an in situ growth, annealing and electrodeposition process. The Co3O4@Ni–Co LDH/NF electrode was prepared with the optimized conditions of annealing temperature 300 °C, deposition time 20 min and Ni/Co ratio 1:1. The results showed that the as-prepared electrode material exhibited an excellent specific capacitance and great cycling stability. Furthermore, an quasi-solid-state supercapacitor was assembled using the prepared Co3O4@Ni–Co LDH/NF as the positive electrode and activated carbon on Ni foam (AC/NF) as the negative electrode. The as-assembled device presented a high energy density and power density.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2019
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IF 2.291
Hongjie Li,Yi He,Qiangbing Yang,Jizhuang Wang,Siming Yan,Chunlin Chen,Jingyu Chen
Electrospinning and carbonization have been combined to fabricate urchin-like nickel nanoparticle@ nitrogen doped carbon composites electrocatalysts for efficient oxygen evolution reaction (OER), in which bamboo-like and graphic N-doped carbon nanotubes encapsulated nickel nanoparticles can be detected on the substrates’ surface. The catalyst has superior performance in OER shows a low overpotentials of 305 mV at 10 mA cm −2 , small Tafel slope of 62 mV·dec −1 and outstanding durability. In addition, the research opens a simple route to develop high-efficient OER electrocatalyst from earth-abundant materials.
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Green Energy & Environment
·
2025
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IF 14.6
Conghao Ku,Lihua Du,Huidu Xu,Xucheng Li,Siyuan Long,Zhengli Liu,Ik Seon Kwon,Jeunghee Park,Weiran Yang
Selective total hydrogenation of biomass-derived 5-hydroxymethylfurfural (HMF) to 2,5-bis(hydroxymethyl)tetrahydrofuran (BHMTHF) under mild condition is crucial in biomass refining, yet dauntingly challenging with non-precious metal catalysts. Herein, the hexagonal-close-packed (hcp) Ni dominated carbon-encapsulated Ni-based catalyst (Ni@C-3) was fabricated via a facile citric acid induced carbonization strategy, which exhibited an outstanding catalytic performance toward the hydrogenation of HMF, achieving a high BHMTHF yield of 95.4% under 70 °C and 2 MPa H 2 . Additionally, even at high HMF concentrations (2500 mM), it maintained an high BHMTHF yield of 89.7%. The carbon layer, derived from the thermal decomposition of citric acid, effectively prevents the agglomeration of Ni nanoparticles and suppresses the phase transition of hcp-Ni to fcc-Ni. The carbon-encapsulated structure ensures the excellent storage stability and reusability of catalysts. Structure-activity relationship studies demonstrated that the hcp-Ni (101) crystal facets effectively reduce the reaction energy barrier of the rate-determining step (furan ring hydrogenation) during the reaction process, thereby promoting the hydrogenation of HMF to BHMTHF. Furthermore, the Ni@C-3 exhibited excellent catalytic activity in the hydrogenation of compounds containing various functional groups. Notably, furfural can also be hydrogenated to tetrahydrofurfuryl alcohol (THFA) under solvent-free conditions, and the yield of THFA can reach 91.2%. This study provides a facile strategy for designing and developing advanced hydrogenation catalysts based on crystal phase engineering, which makes it a promising alternative to noble metal catalysts in biorefineries.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Haibin Wang,Xiaoqiang Du,Xiaoshuang Zhang,Lu Li
Electrocatalytic water splitting has become one of the most promising and effective ways to solve energy crises and environmental pollution. In this work, a series of M-doped Co 3 O 4 materials with foreign ions (M = Ce, Ni and Fe) were grown on a Ni foam substrate through classical hydrothermal and calcination methods. It is worth noting that not all doping of foreign ions can promote the electrocatalytic performance of intrinsic materials. The Ce-doped Co 3 O 4 material shows excellent oxidation properties of water (overpotential of 320 mV at 50 mA cm −2 ) and urea (potential of 1.39 V at 50 mA cm −2 ). However, the doping of Ni reduces the water oxidation performance of the intrinsic material (overpotential of 410 mV@ 50 mA cm −2 ), and the doping of Fe reduces the urea oxidation performance of the inherent material (potential of 1.45 V@ 50 mA cm −2 ). A series of experimental results indicate that the improved activity of the Ce-Co 3 O 4 electrode is attributed to faster electron transport capacity, higher exposure to active sites, and improved conductivity due to doping of Ce. It is noteworthy that the doping of these ions does alter the rate-determination step for the water oxidation reaction. The stability test demonstrated that the current density of water oxidation and urea oxidation of the catalyst had no significant attenuation after a long electrocatalytic activity test. This work provides a new idea for improving the electrocatalytic activity of catalysts by a doping strategy.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zekai Mu,Xianglei Liu,Hang Shi,Chao Song,Chunzhuo Dang,Ke Gao,Nan Sun,Cheng Tian,Hangbin Zheng,Xinrui Wang,Yimin Xuan
By converting two greenhouse gases into fuels, CO 2 reforming of CH 4 via free and clean solar energy is a promising solution to the energy shortage and global warming problems simultaneously. However, serious challenges such as limited light-to-fuel efficiency, severe catalyst aggregation, and deactivation still exist for reactors employing traditional catalyst powders. Here, Ni/MgAlO x -LDH catalysts loaded Ni foam reactor with heat recovery is proposed for highly efficient and stable CO 2 reforming under direct concentrated solar irradiation. The temperature nonuniformity is reduced by 84.3% compared to powdered systems, which benefits from the high thermal conductivity of nickel foams. Overheating is also prevented, which leads to much less carbon deposition and relieved active sites aggregation. Ultrahigh light-to-fuel efficiency of 36.51% is achieved, which is much higher than that of traditional powdered systems (23.87%). Numerical simulation results have an excellent agreement with experiments and demonstrate that heat recovery can greatly improve CRM rates by 23.8%. This work opens new routes to achieve highly efficient, stable, and scalable solar-driven CO 2 reforming via Ni/MgAlO x -LDH catalysts loaded Ni foam reactors with heat recovery.
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