INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
·
IF 4.2
Tao Shen,Jiawen Wu,Qingya Liu,Zhenyu Liu
Conversion of calcium carbonate (CaCO3) to calcium oxide and methane (CH4) by renewable hydrogen is promising to retrofit the current CaCO3 decomposition processes in many industries and, at the same time, to replace their carbon dioxide emission by CH4 generation. This work studies CaCO3 hydrogenation by a liquid organic hydrogen carrier, 9,10-dihydrophenanthrene (DHP), and the catalytic effect of nickel carbonate (NiCO3) at 400 °C. It is found that NiCO3 in situ forms Ni particles of 200–900 nm in size that promote CH4 formation from CaCO3. At the NiCO3:CaCO3:DHP molar ratios of 1:10:55 and 400 °C, the total CO32– conversion, CH4 selectivity, and CH4 formation from CaCO3 are 89.5, 40, and 80.3%, respectively, in 40 min.
研究领域:
化学工程
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science-Nano
·
2019
·Vol. 6
·期 6
·1866-1875
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IF 7.704
Qianwei Li,Daoqing Liu,Chunmao Chen,Zhiguo Shao,Huazhen Wang,Jicheng Liu,Qiangbin Zhang,Geoffrey Michael Gadd
Ureolytic microorganisms have attracted much interest for the bioprecipitation, removal and biorecovery of toxic metals from aqueous solution but little is known about the distribution of cationic/anionic components or quantification of metal species in a fungal system, or the contribution of extracellular protein structure and adsorption during precipitation. In this research, carbonate-rich fungal growth supernatants were applied for bioprecipitation of Ni-containing minerals. The solubility and stability of relevant nickel species was calculated and simulated using Geochemists' Workbench (GWB) and the structure and adsorption of extracellular protein were determined using attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR). The results showed that hydrated nickel carbonate and trace nickel phosphate minerals, with a proportion being of nanoscale dimensions, were precipitated after mixing fungal growth supernatant and NiCl2. The solubility diagrams calculated by GWB showed that under the same condition nickel phosphates were the only precipitate in the simulated system. X-ray photoelectron spectroscopy (XPS) results showed the existence of protein N in the minerals and a protein–nanoparticle bond in C 1s spectra, which showed that extracellular protein might be an important factor in the difference between experimental results and the geochemical simulation. ATR-FTIR showed that during the biomineralization process, the conformation of extracellular proteins changed and β structures increased at the expense of highly ordered α-helixes and other disordered structures, which might provide more nucleation sites to promote the crystallization of nickel carbonate especially under saturated conditions of CO32−. These results demonstrate that the combination of geochemical modelling and experimental analysis provide more complete scientific data to the explain differences between experimental results and theoretical outcomes. This can therefore enable reasonable predictions as to the effect of metal-containing nanoparticles on protein structure, and vice versa, during the process of metal bioprecipitation mediated by a carbonate-rich fungal growth supernatant system.
研究领域:
环境生物学
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生物地球化学
✓ 已验证
DOI
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 24
·2201751
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IF 17.521
Binbin Guo,Jiahui Kang,Tianbiao Zeng,Hongqiao Qu,Shixiang Yu,Hui Deng,Jiaming Bai
Electrically assisted water splitting is an endurable strategy for hydrogen production, but the sluggish kinetics of oxygen evolution reaction (OER) extremely restrict the large-scale production of hydrogen. Developing highly efficient and non-precious catalytic materials is essential to accelerate the sluggish kinetics of OER. However, currently used catalyst supports, such as copper foam, suffer from inferior corrosion resistance and structural stability, resulting in the disabled functionality of 3D conductive networks. To this end, a novel 3D freestanding electrode with corrosion-resistant and robust Ti–6Al–4V titanium alloy lattice as the catalyst support is designed via a 3D printing technology of selective laser melting. After the coating of core–shell Cu(OH)2@CoNi carbonate hydroxides (CoNiCH) on the designed lattice, a unique micro/nano-sized hierarchical porous structure is formed, which endows the electrocatalyst with a promising electrocatalytic activity (a low overpotential of 355 mV at 30 mA cm −2 and Tafel slope of 125.3 mV dec −1 ). Computational results indicate that the CoNiCH exhibits optimized electron transfer and the catalytic activity of the Ni site is higher than that of the Co site in the CoNiCH. Therefore, the integration of robust catalyst supports and highly active materials opens up an avenue for reliable and high-performance OER electrocatalysts.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Xuping Jia,Yuying Zhao,Xinyuan Xu,Zhenyu Xiao,Shujuan Lv,Fengming Zhou,Qi Zhang,Chao Chen,Juan Liu,Lei Wang
Recently, the anion-functioned or anion-doped Co/Ni hydroxide materials have attracted widespread concern in the scientific field due to their dramatically enhanced performances in energy storage and conversion application. Herein, we reported effective metal–organic frameworks (MOFs) etching strategy to construct the MOFs derived cobalt–nickel hydroxide carbonate (CNHC) double-shell microspheres for boosted supercapacitor performance. The etching process is driven by the CO32– and OH– anions via the hydrolysis of urea, and the organic ligand in MOFs is gradually substituted by the CO32– and OH– anions to form the thermodynamically stable Co/Ni(CO3)x(OH)y phase. Then, the hierarchical double-shell structure constructed by a self-supported Co/Ni(CO3)x(OH)y nanosheet is accessed by the Ostwald ripening process, which provides abundant channels and abundant accessible active centers for enhanced electrochemical reaction kinetics. The optimized CNHC-12h electrode demonstrates a high specific capacitance of 1233.6 F g–1 at 1 A g–1 and outstanding rate performance of 80% when the current density is expanded ten times. In addition, the hybrid supercapacitor device assembled by CNHC-12h//AC achieves the high energy density of 41.8 Wh kg–1 at the power density of 0.8 kW kg–1 and can operate the thermometer normally for 20 min with 5 s charging time. The construction of MOFs derived basic carbonate materials will provide a possibility to synthesize high capacitance performance anions-functioned hydroxide electrode materials for energy storage devices and practical application.
研究领域:
材料科学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 21
·10064-10073
·
IF 9.931
Jiahui Kang,Jiali Sheng,Jinqi Xie,Huangqing Ye,Jiahui Chen,Xian-Zhu Fu,Guoping Du,Rong Sun,Ching-Ping Wong
Developing highly efficient and low-cost oxygen evolution reaction (OER) electrocatalysts is highly demanded, as the OER is recognized as a key half-reaction in water splitting for producing hydrogen; however, this still remains a great challenge. Herein, we design three-dimensional (3D) tubular hierarchical core–shell electrocatalysts for the OER using a simple and highly controllable two-step method. The large-scale tubular Cu(OH)2 arrays are directly grown on Cu foam (CF) at room temperature, followed by the growth of highly porous CoNi carbonate hydroxides (CH) via a low-temperature hydrothermal method on the walls of these Cu(OH)2 nanotubes (NTs). The hollow and open-structured core–shell hierarchical Cu(OH)2@CoNiCH NTs/CF electrode with a large surface area and numerous mesoporous and short diffusion paths can provide many active sites, fast electron transport and easy accessibility of water, leading to an excellent OER activity in an alkaline electrolyte with an overpotential of 288 mV and 326 mV at a current density of 30 mA cm−2 and 100 mA cm−2, respectively, also with robust durability. This new structure would open an avenue for the advancement of highly efficient OER electrocatalysts.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 29
·11430-11438
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IF 8.262
Hua Tian,Lin Wang,Yang Jiang,Lin Zhang,Yan Li,Li Hou,Cunqi Wu,Faming Gao
Graphene has great potential to significantly enhance the electrochemical activity of redox-active materials for supercapacitors. However, the agglomeration of graphene sheets remains a critical challenge to excellent energy storage performance of hybrid composites supported by graphene. Herein, a facile hydrothermal approach for the synthesis of porous Ni2CO3(OH)2/functionalized graphene (NCB/FGN) composites is developed. To improve the dispersion properties of graphene, sulfonated salicylic acid serving as a functionalized composition is covalently anchored to the surface of functionalized graphene. The systematic investigation indicates that the presence of functionalized graphene plays a crucial role in establishing the porous structure of hybrid composites. Compared to reduced graphene oxide (rGO), functionalized graphene is more beneficial to accommodate the expansion of the surface area and the reduction of the pore length in hybrid composites. The detailed electrochemical characterization demonstrates that the unique porous structure of NCB/FGN composites encompasses the great capability of rapid kinetic diffusion of active ions in electrolytes during the electrochemical reaction. The specific capacitance of NCB/FGN composites is 1508 F g−1 at a current density of 1 A g−1, higher than 1258 F g−1 for NCB/rGO composites and 1039 F g−1 for pristine NCB. After 3000 charge–discharge cycles at a current density of 10 A g−1, the specific capacitance of NCB/FGN composites still approaches their initial capacitance.
研究领域:
材料科学
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电化学
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纳米复合材料
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能源存储
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表面功能化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）