INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Chen Chen,Xu Guan,Hongbo Wang,Shijie Dong,Ping Luo
In this paper, a novel Al–Bi(OH) 3 system hydrogen-generating material is investigated. Hydrolysis experiments show that the hydrolysis properties of the Al–10 wt% Bi(OH) 3 composite are significantly improved by doping with sodium chloride, and the Al–10 wt% Bi(OH) 3 –5 wt% NaCl composite has a low activation energy (10.4 kJ mol −1 ). With the further optimization of milling time, the hydrogen yield of Al–10 wt% Bi(OH) 3 –5 wt% NaCl composite reaches 1000 mL g −1 in 1 min. X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, energy-dispersive spectroscopy and thermogravimetric analysis are applied to characterize the composite and explore the hydrolysis mechanism. The characterization results show that the activation of aluminum mainly comes from three factors: (1) The formation of alumina during ball milling plays an important role in preventing the agglomeration between Al–Bi, Al–Al and Bi–Bi; (2) Bismuth generated during ball milling can form micro-galvanic cell with aluminum to promote the corrosion of aluminum; (3) Sodium chloride as a grinding aid contributes to crush aluminum powder , and chloride ions facilitate the corrosion of aluminum in the hydrolysis process . In addition, the drying method and initial water temperature have a great influence on by-products. The composite is expected to be used in mobile emergency fuel cell due to its rapid hydrogen production capacity.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2014
·Vol. 17
·期 1
·335-342
·
IF 6.852
Muge Niu,Yucui Hou,Shuhang Ren,Wenhua Wang,Qitian Zheng,Weize Wu
Conversion of cellulose, the most abundant biomass, shows a high selectivity to yield formic acid (FA), when oxidized by O2 in NaVO3–H2SO4 aqueous solution. This conversion involves various reactions including hydrolysis and oxidation. In this work, the relationships between these reactions were studied. There are mainly two hydrolyses and two oxidations occurring in the conversion: initial hydrolysis (from cellulose to monosaccharides) and deep hydrolysis (from monosaccharides to levulinic acid); catalytic oxidation (from monosaccharides to FA) and ordinary oxidation (from levulinic acid to acetic acid). Among these four reactions, catalytic oxidation to FA and deep hydrolysis to byproducts are competitive. The increasing rate of deep hydrolysis is faster than that of catalytic oxidation, when temperature is increased. Catalytic oxidation is promoted and deep hydrolysis is suppressed, when the O2 pressure is increased. Moreover, deep hydrolysis is promoted and catalytic oxidation is suppressed, when H2SO4 concentration is increased. The hydrolysis–oxidation pathway of this conversion was proposed. Thus, the byproducts could be inhibited, and FA-oriented transformation could be realized.
研究领域:
生物化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Wenbin Tang,Jin Shen,Zhongjie Shen,Jiawei Wang,Zizheng Dong,Jianliang Xu,Haifeng Liu
By-products of the hydrolysis reaction in the copper-chlorine thermochemical cycle for hydrogen production are key to the final thermal and hydrogen efficiency. The current study focuses on the influences of reaction time, temperature, and steam partial pressure on the hydrolysis reaction and by-product formation mechanism via experimental and multiple analytical methods. The result demonstrates that the hydrolysis reaction of CuCl 2 and steam converts to CuCl and Cu 2 OCl 2 , with a high conversion of 97%, while the Cu 2 OCl 2 and CuCl 2 -CuO product mixtures exhibit interconversion capabilities. The increase of temperature increases the CuCl product content, while the decrease of steam partial pressure increases the by-product CuCl 2 . Particle morphology and reaction thermodynamics are analyzed for main and by-products formation. Finally, the homogeneous reaction model and shrinking core model are used and compared for the activation energy of the formation of Cu 2 OCl 2 for the hydrolysis reaction and the effect of by-products.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
INORGANICA CHIMICA ACTA
·
2018
·
IF 2.264
Aishan Ren,Dongjian Zhu,Wei Xie,Xingcun He,Zhenhua Duan,Yanghe Luo,Xing Zhong,Mubo Song,Xiaowei Yan
A novel reaction-based fluorescent probe ( 2 ) for Cu 2+ was designed and synthesized. 2 exhibited remarkable fluorescence enhancement (65-fold) after the addition of Cu 2+ . Base on the absorption spectra, fluorescence spectra, ESI-MS and 1 H NMR spectra analysis, the fluorescence response was attributed to Cu 2+ -promoted hydrolysis of the picolinate moiety to yield a highly fluorescent product, 6-acetyl-2-hydroxynaphthalene ( 1 ). Moreover, 2 not only displayed a rapid response time (within 6 min), high sensitivity (detection limit of 8.5 nM), and high selectivity for Cu 2+ over other metal ions, but also could detect Cu 2+ by absorption spectra, fluorescence spectra, even an obvious fluorescence color change at room temperature.
研究领域:
分析化学
·
生物分析
·
环境科学
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2024
·
IF 4.1
Chenghu Dai,Zihua Ren,Wei Hu,Qiang Liu,Zhiyong Pang
Organic cocrystals with charge-transfer (CT) properties are more competitive to tune the physicochemical properties. Mechanochemical preparation is the easiest way to prepare clean and green cocrystals among most common crystal engineer field. A new CT complex of trans- N-benzylideneaniline (NBA)-1,2,4,5-tetracyanobenzene (TCNB) cocrystal (NTC) is prepared by grinding the mixed powders. The NTC enhances the photoluminescence quantum yield (PLQY) from non-fluorescent NBA and intermolecular CT interactions between NBA and TCNB facilitate the two-photon excited fluorescence. Furthermore, the hydrolysis reaction of NBA and cocrystal-to-cocrystal transformation of TCNB-aniline complex realize large-range fluorescence color adjustment.
研究领域:
有机化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
·
2020
·
IF 6.082
Ming Su,Haiping Hu,Jianchang Gan,Wenhua Ye,Wenhua Zhang,Huihu Wang
Real-time hydrogen production at low temperature can effectively solve the problem of hydrogen storage and transportation in cold area and plateau region . In this study, a novel Al alloy/NaCl/g-C 3 N 4 composite with enhanced low temperature reactivity for hydrogen production has been synthesized by mechanical ball milling method. The feasibility of Al-water reaction at the temperature of 253.15–373.15 K was firstly proved by thermodynamic calculation . The hydrogen generation performance was studied in tap water at 298.15 K and 23 wt% NaCl aqueous solution at low temperature of 253.15–273.15 K. The results indicated that the addition of g-C 3 N 4 can effectively promoted the hydrolysis of activated Al composites. Hydrogen yield of Al alloy/NaCl/g-C 3 N 4 composite with 1 g of g-C 3 N 4 addition reached 1006 mL·gAl −1 and the induction time of reaction was 90 s at 253.15 K, while that of Al alloy was only 230 mL·gAl −1 and 1120s respectively. It was supposed that the addition of g-C 3 N 4 effectively reduced the size of NaCl particles and promoted their uniform distribution in Al matrix and more cracks were generated. The kinetics and reaction mechanism using Al alloy/NaCl/g-C 3 N 4 composite were discussed. This study provides a new idea for the synthesis of Al composites with high reactivity at low temperature.
研究领域:
化学工程
·
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Ali Hammad,Siyi Zou,Fandi Ning,Bin Tian,Wei Li,Xiong Dan,Xi Cheng,Xiaochun Zhou
Hydrogen production from silicon (Si) hydrolysis is environmentally friendly, safe, portable, and promising. However, the self-protected oxide layer around Si and a sluggish hydrolysis rate impede its practical utilization. To address this problem, we introduced sodium hydride (NaH) to form the core–shell structure of NaH/Si composites via a straightforward one-step, hand-mixing method in an ambient environment. NaH-based Si-M composites exhibit 83% hydrogen yield and a 52.7 mL/min hydrogen generation rate at 1–0.7 molar ratios. The hydrolytic activity includes the breakdown of NaH and the continuous hydrolysis of Si. X-ray diffraction, scanning electron microscopy, nanoindentation, and reaction observation studies have verified that NaH is pivotal in promoting thorough Si hydrolysis and attaining the maximum achievable yield compared to calcium hydride (CaH2). NaH/Si composites showed excellent hydrogen generation performance compared to CaH2/Si composites with microstructure silicon Si-S ≈ 1–3 μm, Si-M ≈ 75 μm, and Si-L ≈ 75–425 μm. Our study provided an innovative design and idea for utilizing cost-effective and easily transportable hydrogen production materials for practical applications, which has the potential for further advancement.
研究领域:
材料科学
·
能源化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY
·
2025
·
IF 9.4
Fei Xiao,Chong Chen,Yongli Zhang,Xiaomu Wen,Jiangbo Zhang,Wei Liu,Zhongliang Ma
In this study, four chlorinated salts were incorporated as catalysts into aluminum composites through ball milling, resulting in the preparation of four activated aluminum composites (Al/Bi/M x Cl y ). The microstructure of these composites was thoroughly examined using Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), X-ray Diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy, and Thermogravimetric Analysis (TGA). Additionally, the hydrogen production characteristics of Al/Bi/M x Cl y during hydrolysis reactions were investigated. The findings indicate that various chloride salts (M x Cl y ) can be uniformly distributed on the surface of the activated aluminum composites. Among the four composites, Al/Bi/NH 4 Cl demonstrated the highest hydrogen production efficiency and volume at temperatures ranging from 10 to 40 °C. Specifically, at 40 °C, Al/Bi/NH 4 Cl achieved a maximum hydrogen generation rate of 82.2 mL‧g −1 ‧s −1 and a total hydrogen volume of 977 mL‧g −1 . Notably, even at 0 °C, Al/Bi/NH 4 Cl maintained a rapid hydrolysis reaction, with a hydrogen production rate of 19.8 mL‧g −1 ‧s −1 and a total hydrogen volume of 908 mL‧g −1 . To elucidate the hydrolysis reaction mechanism, the intermediate products, corrosion potentials, temperature variations, and pH changes within the reaction system were also analyzed in detail. The results confirmed that different M x Cl y catalysts exhibit distinct catalytic mechanisms for the reactive aluminum composites. Particularly, the addition of NH 4 Cl during the preparation process facilitated the formation of a multilayer structure in Al/Bi/NH 4 Cl, which effectively accelerated particle fragmentation during the hydrolysis. Furthermore, the acidic nature of NH 4 Cl efficiently suppressed the increase in solution pH, thereby reducing the deposition of aluminum hydroxide on the particle surfaces and enhancing the overall hydrolysis reaction of aluminum.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2013
·
IF 4.387
Hongbo Li,Jing Li,Qin Xu,Zhanjun Yang,Xiaoya Hu
A novel visible light sensitized photoelectrochemical sensing platform was constructed based on the perylene-3,4,9,10-tetracarboxylic acid/titanium dioxide (PTCA/TiO 2 ) heterojunction as the photoelectric beacon. PTCA was synthesized via facile steps of hydrolysis and neutralization reaction, and then the PTCA/TiO 2 heterojunction was easily prepared by coating PTCA on nano-TiO 2 surface. The resulting photoelectric beacon was characterized by transmission electron microscope, scanning electron microscopy, X-ray diffractometry, FTIR spectroscopy, and ultraviolet and visible spectrophotometer. Using parathion-methyl as a model, after a simple hydrolyzation process, p-nitrophenol as the hydrolysate of parathion-methyl could be obtained, the fabricated derivative photoelectrochemical sensor showed good performances with a rapid response, instrument simple and portable, low detection limit (0.08 nmol L −1 ) at a signal-to-noise ratio of 3, and good selectivity against other pesticides and possible interferences. It had been successfully applied to the detection of parathion-methyl in green vegetables and the results agreed well with that by GC–MS. This strategy not only extends the application of PTCA, but also presents a simple, economic and novel methodology for photoelectrochemical sensing.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Weihao Wang,Qin Liu,Hong Zhang,Lianmeng Cui,Bomian Zhang,Baokang Niu,Ahmed Eissa Abdelmaoula,Chunhua Han,Lin Xu
The concentrated hydroxide ions (OH–) resulting from the hydrogen evolution reaction gives rise to substantial challenges for the Zn anode/electrolyte interface, including proliferating byproducts and severe dendrite growth. Herein, methyl acetate (MA) additive is proposed to eliminate the crippling OH–, hence manipulating interfacial pH and alleviating accumulation of byproducts. Raman spectra and FTIR analysis elucidate the underlying mechanism of the hydrolysis reaction, which means attacked carbonyl corresponding to the elimination of OH–. In situ pH monitoring verifies availably inhibited OH– concentration with MA additive. From multidimension analysis, the base-catalyzed hydrolysis strategy can significantly protect Zn anode from deterioration during “shelf life” contributing to following superior Zn plating/stripping. Consequently, with MA additive, the pH is stabilized at a lower level of 5.11. Zn plating/stripping achieves a conspicuous cycle life of 2000 h (2.0 mA cm–2 with 2.0 mA h cm–2). Even after “shelf life”, Zn||Zn symmetric cells deliver an impressive cycling stability of 700 h compared to the counterpart of 22 h in ZnSO4. Zn||MnO2/CNT pouch cells with a high mass loading cathode of ∼8 mg cm–2 exhibit a stable lifespan of 100 cycles at 1 C. This work demonstrates a hydrolysis strategy to manipulate interfacial pH and stabilize the interface for the reversible Zn anode.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2016
·
IF 1.78
Xue-Jie Tan,Shuang-Shuang Cheng,Yan Shi,Dian-Xiang Xing,Yun Liu,Hui Li,Wen-Quan Feng,Jian-Bo Yang
Maleimide groups are used extensively in bioconjugation reactions, but limited mechanistic studies are available regarding their hydrolysis reactions . In this paper, five single-crystal structures related with the reaction of four-step hydrolytic degradation of N,N ′-ethylenedimaleimide have been investigated. On the basis of experimental results, the reaction mechanisms without or with water catalysis are proposed, which could provide some enlightenment into the study of similar hydrolytic degradations.
研究领域:
化学
·
生物学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 17
·12872-12878
·
IF 3.84
Guannan Tang,Wenxiu Li,Xiaodong Cao,Hua Dong
In this study, multiple shapes like spherical, ellipsoidal, disk-like, and rod-like inorganic/organic hybrid particles are fabricated using droplet-based microfluidics. Instead of photo-polymerization, which is commonly used in previously reported studies, the diversity in particle configuration is realized via the fast hydrolysis of an organometallic compound. In comparison to inorganic/organic hybrid particles fabricated by directly incorporating inorganic components in the dispersed phase before droplet formation, our hybrid particles are synthesized in situ because the inorganic component is one of the hydrolysis products, which avoids the agglomeration or precipitation of inorganic components and thus ensures particle homogeneity. In this study, we demonstrate a new strategy by using hybrid particle containing poly (lactide-co-glycolide) (PLGA) and TiO2 as a model material, among which TiO2 is obtained from the hydrolysis of n-butyl titanate (TBT). The convoluted surface texture of PLGA/TiO2 particles can be attributed to either the interfacial instabilities of droplets induced by n-butanol as the other hydrolysis product, or the elastic-driven wrinkling of the solid film generated on PLGA/TBT droplet surfaces through TBT hydrolysis. Moreover, due to the presence of hyper-dispersed n-butanol caused by localized TBT hydrolysis in the PLGA matrix, a porous internal structure can be formed in the PLGA/TiO2 particle. We believe this strategy is versatile to fabricate numerous types of inorganic/organic hybrid particles, among which partial or all components can be synthesized through the quick hydrolysis of organometallic compounds.
研究领域:
材料科学
·
化学工程
·
生物医学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）