Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Zhaoying Li,Jinfu Lyu,Hao Qi,Daokuan Liang,Xiaofeng Li,Haoxi Ben,Lianghuan Wei,Qirong Yang
The large-scale blooming of Enteromorpha prolifera (EP) results in "green tide," triggering significant environmental issues . However, EP as algal biomass can be converted to syngas through fast pyrolysis . This research investigates the fast pyrolysis of modeled compounds of EP for syngas production . Rhamnose (Rha), glucuronic acid (GlcA), aspartic acid (Asp), glutamic acid (Glu), and alanine (Ala) are used as the model compounds. This study employs experiments and simulations on fast pyrolysis processes . The results reveal that polysaccharide sulfate (PS) undergoes various reactions, including glycosidic bond cleavage, pyran ring opening, dehydration, and C-C bond cleavage. Simultaneously, amino acids experience dehydration, deamination, decarboxylation , and decarboxylation reactions. Fast co-pyrolysis of modeled compounds of EP, the monosaccharides and uronic acid molecules produced by PS pyrolysis also attack each other with amino acid molecules to produce other substances. The pyrolysis gas obtained from the model compounds of PS exhibits the highest CO content. Notably, amino acids possess a superior capability to produce H 2 compared with PS. With the fast co-pyrolysis of EP model compounds, the CO 2 content increases while the CO content decreases. This study provides a theoretical basis for the fast pyrolysis of EP to produce syngas.
研究领域:
环境科学
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能源科学
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生物化学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Yannan Sun,Jiafeng Yu,Xingtao Sun,Yu Han,Qingjie Ge,Jian Sun
Molybdenum carbide has shown great potential in various hydrogenation reactions, and serves as a primary active species for synthesis of ethanol from dimethyl oxalate hydrogenation process which is a crucial step in the efficient utilization of coal resources. In this study, a molybdenum carbide catalyst with a three-dimensional mesh-like hollow structure and lattice defects was carefully designed. The MoO 3 precursor with abundant oxygen vacancies and defects was prepared by flame spray pyrolysis, and a structural modifier, Cu, was introduced by sputtering. The Cu deposited by sputtering affected the carburization and phase evolution processes. A three-dimensional mesh-like hollow structure composed of defective molybdenum carbide is formed, with the β -Mo 2 C exhibiting lattice distortions and defects. This defective β -Mo 2 C exhibits high reactivity, and facilitates the C=O hydrogenation process, showing a high reactivity of 83.1% yield in the hydrogenation of dimethyl oxalate. This work provides a new approach to the design and application of molybdenum carbide catalysts.
研究领域:
能源化学
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催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Xia Bai,Jingmin Ge,Huanhuan Yang,Huiwen Tian,Xueqi Liu,Shiying Li,Zhikun Peng,Yaxi Li,Jiahao Wang,Hongpo Liu,Qun Xu
Building of grain boundary (GB) in Cu-based catalysts has been demonstrated to be an efficient strategy to control the product selectivity of electrochemical CO 2 reduction reaction (eCO 2 RR). However, the fabrication and modulation of GBs in Cu are still challenging. In this study, a series of bare Cu catalysts with controllable density of Cu(111) GBs were investigated systematically for eCO 2 RR. These catalysts exhibit superior eCO 2 RR performance for syngas production with a high FE of ∼80 % and tunable H 2 /CO ratio of 0.46–2.78. Three-dimensional wormlike Cu with abundant (111) GBs displays a stable H 2 /CO ratio of ∼0.5 over a wide potential range from −0.9 to −1.2 V ( vs. RHE). In situ Raman and ATR-SEIRAS spectroscopy combined with DFT calculations reveal that Cu(111) GBs enhance the adsorption of CO 2 , lower the energy barriers of CO 2 to *COOH and *CO, further highlighting the potential to control syngas production with desirable proportion over Cu-based catalysts.
研究领域:
材料科学
·
电化学
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催化
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能源转化
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Yi-Hong Yu,Xin Cui,Yi-Meng Hong,Gao-Wu Qin,Song Li
Incorporating electrochemical CO 2 reduction (ECR) that produces CO-rich syngas into the workflow of steelmaking presents a promising strategy to neutralize the steelmaking industry. Herein, we develop a highly efficient and stable Ag nanowires with surface CeO 2 armors (CeO 2 /AgNWs) as ECR electrocatalyst for syngas production. The engineered CeO 2 -Ag interface facilitates CO 2 -to-CO conversion by lowering the energy barrier for *COOH intermediate formation through synergistic electronic effects. At an industrially relevant current density of −251.3 mA cm −2 , the CeO 2 /AgNWs generate CO-rich syngas by co-electrolysis of CO 2 and H 2 O, with a high Faradaic efficiency (FE) of 92.1 % for CO. Techno-economic analysis (TEA) reveals that integrating the CeO 2 /AgNWs-driven ECR into existing steelmaking workflows can potentially reduce CO 2 emissions by 83 % and elevate the renewable energy utilization to ∼91.4 %, unlocking new possibilities for achieving carbon neutrality in the steel industry.
研究领域:
材料科学
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能源工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Jiliang Ma,Aohua Li,Qiong Liu,Lei Chen,Min Hong,Runcang Sun
The photocatalytic conversion of biomass utilizing two-dimensional (2D) MBene as co-catalyst represents an exemplary approach for the sustainable production of syngas and lactic acid, capitalizing on the renewable resources of biomass carbon and solar energy. In this study, CrB MBene was synthesized via in-situ exfoliation in an HCl aqueous solution and subsequently integrated with Cd 0.8 Zn 0.2 S through an in-situ growth strategy, aiming to facilitate the photocatalytic co-production of lactic acid and syngas. Notably, the CZS/CrB-10 variant demonstrated a remarkable 12.3-fold enhancement in the hydrogen evolution rate (1746.6 μmol g −1 h −1 ) compared to standalone Cd 0.8 Zn 0.2 S, highlighting the exceptional co-catalytic efficiency and air stability of CrB MBene. Under optimal experimental conditions, the lactic acid yield and CO evolution rate attained 75.4 % and 917.8 μmol g −1 h −1 , respectively. The incorporation of CrB MBene as a co-catalyst was found to significantly improve sunlight utilization, enhance the separation and transfer of photogenerated charge carriers, and mitigate the recombination of electrons and holes. This research underscores the potential of CrB MBene as a promising and cost-effective co-catalyst, with implications for advancing artificial photosynthetic systems and the integration of photocatalytic biomass refining with water splitting technologies.
研究领域:
材料科学
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可再生能源
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2024
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IF 4.4
Shan Hu,Yunfei Gao,Lu Ding,Xueli Chen,Weitong Pan,Fuchen Wang
Hydroformylation is an important reaction for aldehyde synthesis and requires ethylene and syngas (CO + H2) with the feedstocks. While these feedstocks are typically synthesized separately, it would be highly desirable to directly convert abundant ethane into ethylene and syngas in a single step. In this work, we loaded B2O3 onto perovskite La0.8Sr0.2FeO3 (LSF) and formed a core–shell structured catalyst, with B2O3 and Sr3B2O6 being the shell and LSF being the core. The shell structure can substantially inhibit deep oxidation of ethane into CO2 and the optimized La0.8Sr0.2FeO3@20B2O3 can achieve 69.2% ethane conversion and 88.8% ethylene + syngas selectivity at 700 °C with good stability, with a ratio of CO/H2 close to 1 : 1. The effects of reaction temperature, space velocity, B2O3 loading, and La/Sr were also investigated. This catalyst marks a promising progress for the direct oxidation of ethane and has good potential for industrial applications.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Processes
·
2024
·Vol. 13
·期 1
·15
·
IF 2.8
Bo Zhang,Peiyu Yao,Fei Li,Li Pan,Wuwan Xiong,Yang Zhang,Xiang Li
Hydrogen production through the catalytic pyrolysis of low-value organic solid waste offers a promising low-carbon and environmentally friendly pathway. However, the design of efficient hydrogen-producing catalysts remains a significant challenge. Herein, NiO/Al2O3as a catalyst precursor was utilized to investigate the effects of reduction temperature gradients (300–800 °C) on the distribution of three-phase products and the composition of gaseous products during the pyrolysis of waste textiles. Compared to unreduced NiO/Al2O3, increasing the reduction temperature (300–700 °C) led to a gradual decrease in liquid-phase products and a notable increase in gas-phase products, with the latter rising by 10.59% at 700 °C. Most strikingly, hydrogen gas production increased by 6.42% under the same conditions. Multi-characterization analyses, including XRD, TEM, and H2-TPR, revealed significant aggregation of highly dispersed Ni species in NiO/Al2O3at higher reduction temperatures. The emergence of XRD characteristic peaks and the (111) crystal face of metallic Ni (Ni0) became apparent at 700 °C. More importantly, the XPS test inferred that the increasement of hydrogen-rich gas production was ascribed to the appropriate Ni0/Ni2+ratio, and the highest hydrogen yield of 41.50% was achieved as the Ni0/Ni2+ratio reached about 1.57. This work not only provides an effective solution for the consumption of waste textiles, but also converts it into high value-added hydrogen-rich gas.
研究领域:
能源科学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2026
·
IF 4.8
Jiantao Liu,Lingling Yin,Pengfei Lv,Hui Bai,Zhihua Gao,Wei Huang
Against the backdrop of mounting concerns regarding global energy scarcity and environmental degradation, the design of efficient and stable catalysts for the sustainable conversion of syngas (CO/H 2 ) to dimethyl ether (DME) is of critical importance. While copper-based catalysts demonstrate high selectivity, they are prone to deactivation via sintering and often promote the water-gas shift (WGS) reaction, resulting in undesirable CO 2 byproduct formation. In this work, the surface of CuAl 2 O 4 spinel catalysts was hydrophobically tailored using saturated fatty acids with different carbon chain lengths—stearic acid (C=18), arachidic acid (C=20), and behenic acid (C=22)—to investigate their effects on catalyst structure and catalytic performance. The findings reveal that hydrophobic modification substantially increased the water contact angle (from 18.19° to over 125°), effectively inhibited the WGS side reaction, and lowered CO 2 selectivity to a minimum of 36.87%. Comprehensive characterization verified that fatty acid molecules grafted onto the catalyst surface, forming a stable -COOCu interface structure. This modification enhanced surface roughness and oxygen vacancy concentration while facilitating the generation of finely dispersed, nano-sized Cu species during the reaction. Notably, the CuAl 2 O 4 catalyst modified with arachidic acid (C=20) delivered the optimal balance of high DME selectivity and minimal CO 2 emissions while maintaining robust CO conversion. This study presents a rational and effective strategy for engineering metal oxide catalyst surfaces to selectively suppress competing side reactions in syngas conversion processes.
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2026
·
IF 29.1
Wang Si-ma,Jiaming Ma,Zhengwu Yang,Kun Chen,Juncheng Hong,Haoyu Yan,Chaoping Xu,Yuming Gao,Dawei Tang,Bo Jiang
Solar-driven dry reforming of methane (DRM) offers an energy-saving and environmentally sustainable route for syngas production. Nevertheless, this technology still suffers from insufficient production rates, especially under high gas hourly space velocity (GHSV). In this work, we design an electron pump catalyst with an asymmetric light-responsive architecture, comprising Ru nanoclusters and Ni single atoms, to boost syngas production rates. Under illumination without external heating, Ru ac -Ni sa /NC achieves a remarkable syngas production of 4.70 mol·g cat −1 ·h −1 at 500°C and a GHSV of 288 000 h − 1 , outperforming state-of-the-art benchmarks by five times, and maintained excellent stability over 1500 min. Experimental and computational studies disclose that the asymmetric architecture enables directional electron transfer and suppresses electron-hole recombination, as an electron pump, creating electron-enriched Ru sites and electron-deficient Ni sites. This interfacial electron configuration furnishes favorable active sites for reactant activation and * CH 3 O formation, thereby improving DRM kinetics. This work unlocks a design strategy for catalysts in solar-driven reactions and provides a mechanistic lever for enhancing electron-transfer efficiency and reactant activation.
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Bin Han,Xinwen Ou,Zuqi Zhong,Shujie Liang,Xu Yan,Hong Deng,Zhang Lin
Industrial wastes such as electroplating sludges and anthropogenic CO 2 , are misplaced resources whose utilization is severely hampered by their complex compositions or low concentration. Herein, on the basis of the specific binding characteristic of metal ions with small molecules, we demonstrate gradient-upcycling of solid wastes into different metal-organic frameworks (MOFs) for anthropogenic CO 2 -to-syngas photoconversion. In low-concentration CO 2 (10%), the as-prepared Ni MOFs exhibits record-high performance for CO 2 -to-CO photoconversion, while Fe MOFs favors for H 2 production. By taking Fe/Ni MOFs as the modular catalysts and adjusting their ratio, syngas with a widely tunable CO/H 2 ratio (1:15-14:1) was produced from CO 2 photoreduction. The diverse catalytic performance of Fe/Ni MOFs originates from the different affinities towards CO 2 /H 2 O, which relates to the 3d electron numbers of metal ions. We further confirm the universality of the gradient recovery approach to upcycle metal resources from solid wastes and the modular catalysts design approach for CO 2 -to-syngas photoconversion.
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Jiaming Wang,Huixian Zhong,Kang An,Qiang Liu,Wu Jin,Yuan Liu
In this work, Ni–Co alloy nanoparticles (NPs) on La-doped SiO2 showed excellent selectivity toward ethanol for direct ethanol synthesis via CO hydrogenation. Over the catalyst with an optimal ratio of Ni/Co, the total alcohol selectivity reached 33.5%, of which ethanol occupied 47.0 wt %. The results demonstrated that the interaction between Co and Ni improved the ability to activate H2 and CO and adjusted the amount of the dissociatively and associatively adsorbed CO. Besides, the mutual dilution of nickel and cobalt in Ni–Co alloy NPs effectively reduced the isolated Co or Ni-clusters; thus, the formation of heavy hydrocarbons was suppressed. In the reaction process, Ni@Co–Co2C, a core–shell composite with a nickel core and Co–Co2C shell, was formed, which suppressed the loss of nickel species. Moreover, with the reaction going on, a small amount of poorly alloyed Co-clusters would be covered gradually by the formed coke, resulting in an increase in alcohol selectivity.
研究领域:
催化化学
·
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2021
·Vol. 13
·期 13
·3184-3197
·
IF 5.686
Chao Huang,Can Zhu,Mingwei Zhang,Yongwu Lu,Qianhao Wang,Heming Qian,Jiangang Chen,Kegong Fang
Graphical Synergetic effect : The physically mixed CuCoAl|t-ZrO 2 multifunctional catalyst could achieve superior selectivity towards alcohols while simultaneously inhibiting the generation of hydrocarbons from CO hydrogenation. Selective synthesis of higher alcohols from syngas is promising but remains challenging owing to the low stability and selectivity towards higher alcohols. Here we introduce a CuCoAl|t-ZrO 2 (t denotes tetragonal crystal phase) multifunctional catalyst that can achieve an alcohol selectivity of 64.8 % with 79.6 % C 2+ OH, and a total selectivity of alcohols and olefins to 81.7 %. The proper proximity was tuned to increase selectivity towards alcohols and decrease the selectivity towards hydrocarbons. The lower surface [H*]/[C*] ratio due to the stronger basic sites of the CuCoAl|t-ZrO 2 limited alkyl (CH x ) species hydrogenation, and promoted CO insertion and carbon chain growth, resulting in improving the alcohols selectivity. Meanwhile, the weaker adsorption of bridge-type adsorbed CO and the lower decomposition rate of multi-bonded adsorbed CO over CuCoAl|t-ZrO 2 inhibited hydrocarbon generation. The selective promotion of the reaction route via the synergetic effect between CuCoAl and t-ZrO 2 was proposed to boost higher alcohols selectivity. This work may aid the rational design of effective multifunctional catalyst with synergistic effects for tuning selectivity.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）