JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2025
·
IF 6
Guo-Cui Mao,Jin-Peng Wang,Hui-Lin Jiang,Bao-Xia Dong,Yun-Lei Teng
We found that the activated LiBH 4 or Ni/LiBH 4 can effectively assist CO 2 hydrogenation into C1 and C2 products at low temperature (100–300 ℃). After CO 2 hydrogenation over the activated LiBH 4 or Ni/LiBH 4 , CH 4 with approximately 100 % selectivity was formed in the gas phase products. CH 3 OH, HCOO − , and high-value CH 3 CH 2 OH were observed in aqueous solution of spent LiBH 4 or Ni/LiBH 4 after CO 2 hydrogenation. CO 2 conversion and CH 4 production are able to be further improved by doping 5–20 wt% Ni into the activated LiBH 4 . The LiBH 4 sample shows a 61.34 % CO 2 conversion at 200 ℃, while the 20 %Ni/LiBH 4 composite displays an 80.14 % CO 2 conversion under the same conditions. The experimental and theoretical results suggest that the synergistic effect from Ni and LiBH 4 results in high CO 2 conversion at low temperature. This new method for CO 2 conversion to C1, C2 products using the activated Ni/LiBH 4 composite may enlighten the materials design for CO 2 utilization.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Zhihua Tian,Fushuo Wu,Peiying Hu,Jianxiang Ding,Yan Zhang,Peigen Zhang,ZhengMing Sun
The properties of MAX phases can be fine-tuned to meet some particular applications via solid solution route, and the feasible preparation of the MAX solid solutions is a prerequisite for their applications. Ti 3 (Sn x Al 1−x )C 2 solid solutions over the whole composition range (x = 0–1) are synthesized by pressureless sintering, and characterized by XRD and SEM. The composition and crystal structure of representative Ti 3 Sn 0.8 Al 0.2 C 2 are examined by HRTEM, HAADF and EDS associated with STEM, and thus the Sn-rich Ti 3 (Sn x Al 1−x )C 2 solid solution is confirmed. Combined with means of thermal analysis, the reaction path for the formation of the Sn-rich Ti 3 (Sn x Al 1−x )C 2 solid solution is explored. Solid solutions are found to form with TiC as the nucleus and grow by reacting with Ti–Sn/Ti–Al intermetallic compounds . This work proves that the Ti 3 (Sn x Al 1−x )C 2 over the whole composition range, in particular, the Sn-rich end of this series of solid solutions can be obtained by the simple pressureless sintering, and would enable the fine manipulation of the composition of these typical MAX solid solutions for technologically important applications.
研究领域:
材料科学
·
固体物理
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Wei Jia,Wengang Liu,Yuandong Cui,Hang Song,Chengfeng Zhou,Wei Jiang,Haoxi Ben,Xiaoli Yang,De Chen
Converting cellulose into C 2 alcohols presents a sustainable alternative to fossil fuels, contributing to the development of eco-friendly and economically viable biofuels and chemicals. Tungsten oxide (WO 3 ) is a key solid acid catalyst for this process, yet limited research explores its diverse morphologies and unique catalytic effects. This study investigates diverse WO 3 morphologies (nanosheets, nanoflowers, nanoblocks, and tetrahedral octahedra) in combination with Pd for converting cellulose to C 2 alcohols. Optimized conditions with Pd/o-WO 3 catalyst resulted in the highest C 2 alcohols (ethylene glycol and ethanol, 80.9 %), notably yielding 64.8 % ethylene glycol. Extensive characterizations and DFT calculations reveal the smaller element occupancy rates and a longer W-O bond length led to a large number of crystal defects over Pd/o-WO 3 . It facilitated the formation of W 5+ –OH sites and Pd-O(H)-W interactions, further synergistically enhancing hydrogenation ability and acidity. Designed experiments to elucidate cellulose conversion pathways, including hydrolysis, retro -aldol condensation, and hydrogenation. This study emphasizes the unique impact of WO 3 morphologies and underscores the importance of supporting crystal defects for catalytic performance in eco-friendly biofuel and chemical production.
研究领域:
催化化学
·
可再生资源与环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Sensen Zhou,Yueli Wen,Bin Wang,Maohong Fan,Lu Ren,Zheng Cui,Wei Huang,Jing Li,Jianping Guo
CO 2 hydrogenation to C 2+ OH is an effective way to diminish CO 2 emissions. Although challenges still exist in large-scale applications, CuFeZn catalysts attract extensive attention due to their low-cost. Herein, CuFeZn catalysts are modified by different amounts of K 3 PO 4 , (KP) 0.1 CuFeZn exhibits an excellent catalytic performance (total alcohols selectivity of 15.76 % at CO 2 conversion of 38.10 %, C 2+ OH/ROH fraction of 94.23 %, and C 2+ alcohols space–time-yield (STY) of 53.81 mg·mL −1 ·h −1 ). Combined with a series of characterization results, it is found that the effect of K 3 PO 4 is complex, and the proportion of Fe 2+ , Cu 0 and medium base shows perfect linear relation to STY of C 2+ OH. The significance level of the above three factors is in the following sequence: Cu 0 ＞Fe 2+ ＞medium base. The introduction of K 3 PO 4 decreases the proportion of Fe 2+ (active site for RWGS, the competitive reaction for C–C coupling) and increases the proportion of Cu + /(Cu + +Cu 0 ) (Cu + is the active site for C–C coupling) due to the synergistic effect of Cu 0 and Cu + , thereby improving the synthesis of C 2+ OH. Moreover, conversion of Fe 0 to Fe 3 C or Fe 3 O 4 plays negative roles in the stability of the catalysts.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2012
·
IF 1.58
Yi-Tian Tang,Xiao-Qiu Dou,Zhi-Ang Ji,Ping Li,Shen-Min Zhu,Jia-Jun Gu,Chuan-Liang Feng,Di Zhang
Dye/water separation is a worldwide challenge because of the increasing industrial dye wastewater. In this paper, a novel pH-responsive C 2 -symmetric cyclohexane based hydrogel was developed and was capable of rapidly adsorbing dye molecules in minutes. This hydrogel dye adsorbent was characterized by Fourier transform infrared (FT-IR) spectroscopy, Ultraviolet–visible (UV–vis) spectroscopy, Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). The adsorption equilibrium of the dyes is in good agreement with Langmuir adsorption isotherm model. Moreover, the hydrogel adsorbent can be recovered easily just by changing the pH of the medium, which is promising to be used an efficient dye adsorbent in water purification .
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2021
·
IF 9.676
Rui Yang,Zipeng Zeng,Zhen Peng,Jiafang Xie,Yiyin Huang,Yaobing Wang
Currently most of research efforts for selective electrocatalysis CO 2 reduction to C2+ products have relied on crystalline Cu-based catalysts; amorphous Cu with abundant low-coordinated atoms holds greater promise for this conversion yet remains relatively underexplored. Here we report an amorphous urchin-like Cu@nanosilica hybrid synthesized by electrostatic coupling Si polyanions with Cu salt in hydrothermal processes. The Cu@nanosilica electrocatalyst displays excellent CO 2 electroreduction activity and selectivity with a Faradic efficiency of 70.5% for C2+ product production, and higher stability compared to the crystalline Cu counterpart. The solar-driven CO 2 electrolysis yields an energy efficiency of 20% for C2+ product production. Mechanism study reveals that the urchin-like Cu@nanosilica catalyst with amorphous Cu/Cu + dispersion enhances CO 2 adsorption and activation to facilitate generation of CO 2 − * and possible CO* intermediates, and suppresses hydrogen evolution concurrently. The combined effects of both aspects promote efficient C2+ product production from CO 2 electroreduction.
研究领域:
材料科学
·
电化学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Auphedeous Y. Dang-i,Ayesha Kousar,Jinying Liu,Vincent Mukwaya,Changli Zhao,Fang Wang,Lei Hou,Chuan-Liang Feng
Tuning of the viscoelastic properties of supramolecular hydrogels to be used as biological material substrates in tissue engineering has become significantly relevant in recent years due to their ability to influence cell fate. In the quest to enhance the stability and mechanical properties of a derived C2-phenylalanine gelator (LPF), derivatives of the polysaccharide dextran were incorporated as additives to promote hydrogen bonding and π–π stacking with the gelator. Dextran was esterified to yield carboxymethyl dextran (CMDH), which was subsequently amidated to furnish amino dextran (AD), the resulting hybrid hydrogels were denoted as LPF-ADx and LPF-CMDHx, where x represents the amount of AD and CMDH (mg). The LPF gelator interacted with the carboxyl and amino functional groups of the CMDH and AD, respectively, through hydrogen bonding and π–π stacking, resulting in mechanically stable hydrogels. Morphological studies revealed that the hybrid hydrogels were formed as a result of dense highly branched thin and broad fibers for LPF-AD and LPF-CMDH, respectively. Rheological studies confirmed the superiority of the hybrid hydrogels over the neat hydrogel, where LPF-CMDH3 exhibited the best mechanical properties with an improved elastic modulus of 11 654 Pa over 1518 and 140 Pa for LPF-AD4.5 and LPF, respectively. The adhesion and spreading behavior of NIH 3T3 fibroblast cells were significantly improved on the LPF-CMDH3 substrate owing to their enhanced mechanical properties. The tuning of the mechanical properties of the therein hydrogels via the facile incorporation of biodegradable and biocompatible functionalized additives opens up avenues for strengthening the supposed weak supramolecular gelators and hence increasing their potential of being employed largely in the field of tissue engineering.
研究领域:
材料科学
·
生物医学工程
·
细胞生物学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Xiang Li,Zhitao Liu,Liyuan Zeng,Wanyi Ye,Guangxing Yang,Qiao Zhang,Shengjun Du,Zhiting Liu,Feng Peng
The CO2 electrochemical reduction (CO2ER) to produce valuable multicarbon products represents a promising approach for enhancing CO2 conversion. While previous research has investigated the impact of Cu electrode surface topography on C2 production, it is important to note that other parameters were also altered concurrently with changes in roughness. To isolate the specific effect of surface texture on CO2 electroreduction, this study prepared Cu layers with varying textures using the sputtering method with a varied sputtering time. To characterize the surface features of the sputtered Cu layers, the developed interfacial area ratio (Sdr), known as areal parameter, was introduced, with the aim of correlating it with C2 product selectivity. The results of this study indicate that the improved selectivity of C2 products can be attributed to higher Sdr values, primarily due to a rougher and finer surface texture that increases the local concentration of CO and OH–. This research underscores the significance of surface topography and offers perspectives for designing efficient Cu electrodes for the CO2ER.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Taotao Zhao,Yuchi Liu,Chenyang Shen,Gui Liu,Jun Yao,Xiaofeng Qian,Qiang He,Feifei Mei,Deming Meng,Xuefeng Guo,Luming Peng,Nianhua Xue,Yan Zhu,Yuming Zhou,Weiping Ding
Here, we report a high-performance catalyst MoS x @HSSZ-39 for conversion of CO x to C 2–4 hydrocarbons, in which MoS x clusters for CO x hydrogenation at the first to intermediate methanol and then the zeolitic acid sites surrounding for further conversion of methanol to hydrocarbons. For CO 2 hydrogenation, C 2–4 hydrocarbons of ∼90% selectivity in organic products at 32.7% of CO 2 conversion and excellent stability of 1000 h on stream are obtained. For CO hydrogenation, 95% of C 2–4 hydrocarbons, 83% of LPG or 74% of propane selectivities at > 22% CO conversion and stable more than 200 h on stream are obtained. The cooperation among the MoS x clusters and the zeolitic acid sites constitutes the catalyst of intimate bifunction, which is the key to the high catalytic performance for CO x hydrogenation.
研究领域:
催化化学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Lei Xiong,Xianbiao Fu,Jun Zhang,Shuang Liu,Shanshan Li,Shaojie Lu,Dong Wang,Qin Yue
Cu shows unique characteristics for electrochemical CO 2 reduction reaction (CO 2 RR) to hydrocarbons and oxygenates due to the moderate adsorption energy of the key intermediate *CO. However, it remains a challenge to selectively control CO 2 RR towards C 1 (e.g., CH 4 ) or C 2+ (e.g., C 2 H 4 and C 2 H 5 OH) through simple interface engineering. Herein, a series of inverse catalysts, composed of CeO 2 nanoparticles over Cu substrate (Cu-CeO 2 -x), are subtly designed to tackle the issues. It is verified CeO 2 decoration induces highly active Cu/CeO 2 interfacial sites that enhance the adsorption and conversion of CO 2 and *CO intermediates into C 2+ or CH 4 , while the Cu sites are conducive to *CO generation. With the increase of CeO 2 deposition, the C 2+ and CH 4 selectivity present a volcano-type and increasing tendency with maximum faradic efficiency of 62.6% and 51.3%, respectively. In-situ infrared spectroscopy and theoretical calculations reveal that moderate CeO 2 loading allows the Cu/CeO 2 interfacial sites to cooperate efficiently with the Cu sites to promote the coupling of *CO/*CHO intermediates, thus enhancing the C 2+ selectivity. In contrast, excessive CeO 2 loading suppresses the C─C coupling but boosts unilaterally the hydrogenation, thus promoting the CH 4 production. This work provides effective strategies to regulate the CO 2 RR selectivity by modulating metal/oxide interfaces.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 16
·2105292
·
IF 17.521
Yawen Jiang,Xinyu Wang,Delong Duan,Chaohua He,Jun Ma,Wenqing Zhang,Hengjie Liu,Ran Long,Zibiao Li,Tingting Kong,Xian Jun Loh,Li Song,Enyi Ye,Yujie Xiong
Structural reconstruction is a process commonly observed for Cu-based catalysts in electrochemical CO 2 reduction. The Cu-based precatalysts with structural complexity often undergo sophisticated structural reconstruction processes, which may offer opportunities for enhancing the electrosynthesis of multicarbon products (C 2+ products) but remain largely uncertain due to various new structural features possibly arising during the processes. In this work, the Cu 2 O superparticles with an assembly structure are demonstrated to undergo complicated structure evolution under electrochemical reduction condition, enabling highly selective CO 2 -to-C 2+ products conversion in electrocatalysis. As revealed by electron microscopic characterization together with in situ X-ray absorption spectroscopy and Raman spectroscopy, the building blocks inside the superparticle fuse to generate numerous grain boundaries while those in the outer shell detach to form nanogap structures that can efficiently confine OH − to induce high local pH. Such a combination of unique structural features with local reaction environment offers two important factors for facilitating C−C coupling. Consequently, the Cu 2 O superparticle-derived catalyst achieves high faradaic efficiencies of 53.2% for C 2 H 4 and 74.2% for C 2+ products, surpassing the performance of geometrically simpler Cu 2 O cube-derived catalyst and most reported Cu electrocatalysts under comparable conditions. This work provides insights for rationally designing highly selective CO 2 reduction electrocatalysts by controlling structural reconstruction.
研究领域:
材料科学
·
电化学
·
环境科学
✓ 已验证
DOI
高影响因子
Science Bulletin
·
2022
·
IF 20.577
Kunhao Liu,Chao Yang,Ruilin Wei,Xingyu Ma,Chen Peng,Zhengzheng Liu,Yangshen Chen,Yaqin Yan,Miao Kan,Yaoyue Yang,Gengfeng Zheng
Although many catalysts have been reported for the CO 2 electroreduction to C 1 or C 2 chemicals, the insufficient understanding of fundamental correlations among different products still hinders the development of universal catalyst design strategies. Herein, we first discover that the surface *CO coverage is stable over a wide potential range and reveal a linear correlation between the partial current densities of CH 4 and C 2 products in this potential range, also supported by the theoretical kinetic analysis. Based on the mechanism that *CHO is the common intermediate in the formation of both CH 4 (*CHO → CH 4 ) and C 2 (*CHO + *CO → C 2 ), we then unravel that this linear correlation is universal and the slope can be varied by tuning the surface *H or *CO coverage to promote the selectivity of CH 4 or C 2 products, respectively. As proofs-of-concept, using carbon-coated Cu particles, the surface *H coverage can be increased to enhance CH 4 production, presenting a high CO 2 -to-CH 4 Faradaic efficiency ( FE CH 4 ∼52%) and an outstanding CH 4 partial current density of –337 mA cm −2 . On the other hand, using an Ag-doped Cu catalyst, the CO 2 RR selectivity is switched to the C 2 pathway, with a substantially promoted FE C 2 of 79% and a high partial current density of –421 mA cm −2 . Our discovery of tuning intermediate coverages suggests a powerful catalyst design strategy for different CO 2 electroreduction pathways.
研究领域:
化学
·
材料科学
·
催化反应
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）