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学者姓名：陈崇启
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Abstract ：
Water gas shift reaction is an important process in hydrogen production from carbon-based materials. Cu-based catalysts are widely used in low-temperature water gas shift reactions. The problem is that Cu species are prone to sintering and deactivation, as well as the controversial reaction mechanism. Herein, CuFe2O4 modified with Al3+ is served as the Cu-based catalyst precursor, and the catalytic structure-activity relationship as well as reaction mechanism are carefully investigated. The modification of CuFe2O4 precursor by Al3+ enhances the Cu species dispersion, redox properties and electron transfer ability, leading to increasing the proportion of Cu+/ (Cu0+Cu+), which results in enhancing the ability of the catalyst to adsorb CO and dissociate H2O. The combination of temperature-programmed surface reaction (TPSR) and infrared spectroscopy shows that the catalyst with weak water dissociation ability and medium CO adsorption capacity are prone to obey the association mechanism.
Keyword ：
Association mechanism Association mechanism Copper ferrite Copper ferrite Cu plus site Cu plus site Metal-support interaction Metal-support interaction Spinel Spinel
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| GB/T 7714 | Zhi, Guo , Huang, Chunjin , Ren, Hongju et al. Ternary Cu-Fe-Al spinel catalyst for hydrogen production via water gas shift reaction: Electron transfer enhancement and reaction mechanism [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2025 , 102 : 1093-1102 . |
| MLA | Zhi, Guo et al. "Ternary Cu-Fe-Al spinel catalyst for hydrogen production via water gas shift reaction: Electron transfer enhancement and reaction mechanism" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 102 (2025) : 1093-1102 . |
| APA | Zhi, Guo , Huang, Chunjin , Ren, Hongju , Fang, Huihuang , Chen, Chongqi , Luo, Yu et al. Ternary Cu-Fe-Al spinel catalyst for hydrogen production via water gas shift reaction: Electron transfer enhancement and reaction mechanism . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2025 , 102 , 1093-1102 . |
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Ammonia is a carbon-free hydrogen carrier, and development of non-noble metal catalyst to decompose ammonia into hydrogen is desirable for practical applications. However, the metal catalyst is challenged by the sintering of metal particles under high-temperature reaction conditions. In this study, a series of Li-, Al-, and Co-containing hydrotalcite-like compounds (HTlc) were synthesized by co-precipitation and used as precursors to prepare well-dispersed and thermally stable Co nanoparticle catalysts for ammonia decomposition. The obtained precursors and catalysts were characterized by means of X-ray powder diffraction (XRD), temperature-programmed reduction (H-2-TPR), X-ray photoelectron spectroscopy (XPS), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), and so on. All of the precursors formed hydrotalcite-like phase, which consisted of Li-Al-(Co) HTlc and/or Co-Al HTlc dependent on the Co content. Upon calcination at 500 degrees C, HTlc decomposed into an Al-substituted Co3O4 spinel oxide, as confirmed by two distinctly separated reduction steps in H-2-TPR. Following reduction at 700 degrees C, well-dispersed Co metal nanoparticles with an average particle size of similar to 9.2-12.4 nm were obtained. It was suggested that the incorporation of Al3+ into Co3O4 led to a strong interaction between cobalt and aluminum, which suppressed the crystal growth of Co3O4 and the sintering of Co metal during the thermal treatments, resulting in good Co dispersion. The optimal LiAlCo(1.5) catalyst showed superior activity than that prepared by impregnation method, giving almost complete conversion of ammonia at 575 degrees C under a space velocity of 5,000 mL g(cat)(-1) h(-1). More importantly, this catalyst maintained stable activity at 625 degrees C for 100 h, exhibiting high stability and sintering resistance. The good catalytic performance was attributed to the high Co metal dispersion and strong metal-support interaction benefiting from the uniform distribution of cobalt in the HTlc precursor. These results demonstrate the applicability of HTlc to the preparation of metal catalysts with improved dispersion and thermal stability.
Keyword ：
Catalytic ammonia decomposition Catalytic ammonia decomposition Cobalt catalyst Cobalt catalyst Hydrogen production Hydrogen production Hydrotalcite-like compounds Hydrotalcite-like compounds
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| GB/T 7714 | Wei, Xiaofeng , Su, Jiaxin , Ji, Yuyin et al. Hydrotalcite-derived well-dispersed and thermally stable cobalt nanoparticle catalyst for ammonia decomposition [J]. | MOLECULAR CATALYSIS , 2025 , 572 . |
| MLA | Wei, Xiaofeng et al. "Hydrotalcite-derived well-dispersed and thermally stable cobalt nanoparticle catalyst for ammonia decomposition" . | MOLECULAR CATALYSIS 572 (2025) . |
| APA | Wei, Xiaofeng , Su, Jiaxin , Ji, Yuyin , Huang, Hongyang , Li, Dalin , Fang, Huihuang et al. Hydrotalcite-derived well-dispersed and thermally stable cobalt nanoparticle catalyst for ammonia decomposition . | MOLECULAR CATALYSIS , 2025 , 572 . |
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氨部分预分解是改善氨的燃烧性能的有效手段,但对于氨预分解条件的影响仍缺乏系统的研究.该文针对基于氨预分解策略的氨扩散燃烧装置开展数值模拟研究,以分析氨预分解比例、当量比和氨分解余热对燃烧及污染物排放特性的影响.结果表明,随着氨预分解比例提高,火焰温度提高,火焰高温区更靠近喷嘴,NOx排放量下降;NO排放在NOx中占主导,并随着当量比的提高先增大后减小;N2O排放主要发生在低氨预分解比例、低当量比条件下,在氨预分解比例达到50％后基本消失;利用氨分解余热预热燃料有助于稳定燃烧,并在氨预分解比例不超过30％时,明显减少氨泄漏而未增加NOx排放.研究表明,提高氨预分解比例和当量比能有效改善氨燃烧及污染物排放特性,而在小比例氨预分解条件下应充分利用氨分解的余热.
Keyword ：
NOx排放 NOx排放 当量比 当量比 数值模拟 数值模拟 氨分解 氨分解 氨氢燃烧 氨氢燃烧
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| GB/T 7714 | 黄文仕 , 王智雄 , 林立 et al. 基于氨预分解的氨扩散燃烧模拟研究 [J]. | 中国电机工程学报 , 2025 , 45 (2) : 479-488,中插7 . |
| MLA | 黄文仕 et al. "基于氨预分解的氨扩散燃烧模拟研究" . | 中国电机工程学报 45 . 2 (2025) : 479-488,中插7 . |
| APA | 黄文仕 , 王智雄 , 林立 , 伍泽赟 , 王大彪 , 罗宇 et al. 基于氨预分解的氨扩散燃烧模拟研究 . | 中国电机工程学报 , 2025 , 45 (2) , 479-488,中插7 . |
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Ammonia is a carbon-free energy carrier with 17.6 wt% hydrogen content. The design of an efficient and compact ammonia decomposition reactor based on low-temperature catalysts is the key to realizing industrial hydrogen production from ammonia. In this work, a multiscale model was developed by bridging the particle-scale characteristics of catalysts and reactor performances, to fully comprehend the ammonia decomposition process. The effects of catalyst porosity and pore diameters on the reactor size, precious metal loading, and the profile of temperature and heat flux were systematically evaluated. An improved reactor design was further proposed by applying the segmented reactor packed with two-stage egg-shell-type low-temperature catalysts, which decreased the precious metal usage by 61.6% and the temperature drop by 42.9 K. This segmentation strategy balanced the reaction rate and heat flux, indicating a significant potential in highly efficient, economical, and reliable hydrogen production from ammonia.
Keyword ：
ammonia decomposition ammonia decomposition catalyst micro-structure catalyst micro-structure hydrogen production hydrogen production multiscale model multiscale model precious metal reduction precious metal reduction
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| GB/T 7714 | Zhang, Lixuan , Wu, Yifan , Huang, Wenshi et al. Multiscale modeling of a low-temperature NH3 decomposition reactor for precious metal reduction and temperature control [J]. | AICHE JOURNAL , 2025 , 71 (6) . |
| MLA | Zhang, Lixuan et al. "Multiscale modeling of a low-temperature NH3 decomposition reactor for precious metal reduction and temperature control" . | AICHE JOURNAL 71 . 6 (2025) . |
| APA | Zhang, Lixuan , Wu, Yifan , Huang, Wenshi , Lin, Li , Wang, Luqiang , Wu, Zeyun et al. Multiscale modeling of a low-temperature NH3 decomposition reactor for precious metal reduction and temperature control . | AICHE JOURNAL , 2025 , 71 (6) . |
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氨分解作为一种很有前景的现场制氢技术,关键在于开发出廉价、高性能的催化剂.本研究通过共沉淀法合成系列NixMg75-xAl25类水滑石化合物(HTlc)作为前驱体,经过焙烧和还原处理制备负载型高分散Ni/Mg(AI)O催化剂并用于氨分解制氢,采用不同研究手段对样品进行了表征,考察了 Ni含量和氨还原对催化性能的影响.结果显示,HTlc前驱体经过焙烧分解形成Mg(Ni,Al)O固溶体,Ni物种与载体之间存在较强的相互作用,经750 ℃氨还原得到高分散Ni金属纳米颗粒,其平均晶粒尺寸为5.9～7.7 nm.质谱分析表明,氨还原过程中无氮氧化物(NOx)生成,同时750 ℃氨还原与氢还原催化剂的活性相当,说明氨是一种合适的还原气.催化剂活性随着Ni含量和还原温度升高而增加.其中,750 ℃氨还原Ni20Mg55Al25催化剂在30000 mL·gcat-1·h-1、600 ℃下的氨转化率为98％,且在100h反应过程中转化率保持不变,Ni金属无明显烧结现象,催化剂表现出良好的活性、稳定性和抗烧结性能.
Keyword ：
制氢 制氢 氨分解 氨分解 类水滑石化合物 类水滑石化合物 镍催化剂 镍催化剂
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| GB/T 7714 | 连敏丽 , 苏佳欣 , 黄鸿杨 et al. Ni-Mg-Al类水滑石衍生镍基催化剂的制备及其氨分解性能 [J]. | 无机材料学报 , 2025 , 40 (1) : 53-60 . |
| MLA | 连敏丽 et al. "Ni-Mg-Al类水滑石衍生镍基催化剂的制备及其氨分解性能" . | 无机材料学报 40 . 1 (2025) : 53-60 . |
| APA | 连敏丽 , 苏佳欣 , 黄鸿杨 , 嵇玉寅 , 邓海帆 , 张彤 et al. Ni-Mg-Al类水滑石衍生镍基催化剂的制备及其氨分解性能 . | 无机材料学报 , 2025 , 40 (1) , 53-60 . |
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Ammonia decomposition is a promising approach for on-site hydrogen generation for fuel cells, and the development of a cost-effective and efficient catalyst is highly desired. In this study, a series of NixMg75-xAl25 hydrotalcite-like compounds (HTlc) with different Ni contents were synthesized by co-precipitation, followed by calcination and reduction treatments. Influences of Ni content and ammonia reduction on the catalytic performance for ammonia decomposition were investigated. The characterization results of the as-prepared samples showed that HTlc was decomposed into Mg(Ni, Al)O solid solution by calcination, which displayed a strong interaction between Ni species and support, while upon reduction with ammonia at 750 degrees C, well-dispersed Ni metal nanoparticles with an average crystallite size range of 5.9-7.7 nm were formed. No nitrogen oxides (NOx) were produced during the NH3 reduction process as indicated by mass spectrometry analysis, and the catalyst reduced with ammonia showed comparable activity with that reduced with hydrogen, suggesting that ammonia can be used as a reductant gas. The catalyst activity increased with the increase of Ni content and reduction temperature. Among the catalysts, the Ni20Mg55Al25 catalyst reduced with ammonia at 750 degrees C showed the best activity, which afforded 98% ammonia conversion at 600 degrees C at a space velocity of 30000 mLg(cat)(-1)h(-1), and no evident deactivation was observed during a 100 h test, demonstrating good activity, stability, and sintering resistance.
Keyword ：
ammonia decomposition ammonia decomposition hydrogen production hydrogen production hydrotalcite-like compound hydrotalcite-like compound nickel catalyst nickel catalyst
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| GB/T 7714 | Lian, Minli , Su, Jiaxin , Huang, Hongyang et al. Supported Ni Catalysts from Ni-Mg-Al Hydrotalcite-like Compounds: Preparation and Catalytic Performance for Ammonia Decomposition [J]. | JOURNAL OF INORGANIC MATERIALS , 2025 , 40 (1) : 53-60 . |
| MLA | Lian, Minli et al. "Supported Ni Catalysts from Ni-Mg-Al Hydrotalcite-like Compounds: Preparation and Catalytic Performance for Ammonia Decomposition" . | JOURNAL OF INORGANIC MATERIALS 40 . 1 (2025) : 53-60 . |
| APA | Lian, Minli , Su, Jiaxin , Huang, Hongyang , Ji, Yuyin , Deng, Haifan , Zhang, Tong et al. Supported Ni Catalysts from Ni-Mg-Al Hydrotalcite-like Compounds: Preparation and Catalytic Performance for Ammonia Decomposition . | JOURNAL OF INORGANIC MATERIALS , 2025 , 40 (1) , 53-60 . |
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Cu-based catalysts have been extensively researched for hydrogen production via water-gas shift (WGS, CO+H2O <-> CO2+H-2) reaction. Yet, the catalyst easily suffers from performance degradation due to Cu+/Cu-0 transformation and particle aggregation. Herein, copper phyllosilicate with different morphologies, i.e., tubular and lamellar, was fabricated by a modified hydrothermal method for the WGS reaction. Compared with the catalyst derived from lamellar copper phyllosilicate (30Cu/SiO2-L), the one derived from the tubular phyllosilicate (30Cu/SiO2-T) demonstrates better performance due to the high Cu+/(Cu-0+Cu+) ratio. In situ characterizations were conducted to unveil the transformation between Cu+ and Cu-0, which is highly correlated to the CO and H2O activation. Cu+ is primarily responsible for the activation of CO, while Cu-0 mainly facilitates the dissociation of H2O. The results show that 30Cu/SiO2-T follows the redox mechanism, where CO reduces Cu+ to Cu-0 and H2O oxidizes Cu-0 to Cu+, maintaining the reaction cycle.
Keyword ：
copper phyllosilicate copper phyllosilicate Cu+-Cu-0 Cu+-Cu-0 morphology morphology redox mechanism redox mechanism water-gas shift water-gas shift
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| GB/T 7714 | Huang, Chunjin , Chen, Yue , Fang, Huihuang et al. Copper Phyllosilicate-Derived Cu Catalyst for the Water-Gas Shift Reaction: Insight into the Role of Cu+-Cu0 and Reaction Mechanism [J]. | ACS CATALYSIS , 2025 , 15 (7) : 5546-5556 . |
| MLA | Huang, Chunjin et al. "Copper Phyllosilicate-Derived Cu Catalyst for the Water-Gas Shift Reaction: Insight into the Role of Cu+-Cu0 and Reaction Mechanism" . | ACS CATALYSIS 15 . 7 (2025) : 5546-5556 . |
| APA | Huang, Chunjin , Chen, Yue , Fang, Huihuang , Zhi, Guo , Chen, Chongqi , Luo, Yu et al. Copper Phyllosilicate-Derived Cu Catalyst for the Water-Gas Shift Reaction: Insight into the Role of Cu+-Cu0 and Reaction Mechanism . | ACS CATALYSIS , 2025 , 15 (7) , 5546-5556 . |
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As a carbon-free hydrogen (H2) carrier with the advantage of liquefaction storage and transportation, ammonia (NH3) is regarded as a competitive clean energy carrier for H2 production and power generation. This work designs a novel NH3-fueled hybrid power generation system, which combines ammonia decomposition reactor (ADR), proton exchange membrane fuel cell (PEMFC) and micro gas turbine (MGT) together with thermochemical recuperation for ADR. A system-level thermodynamic model has been developed to evaluate system performance with different optimization strategies. The model calculation reveals that the NH3 decomposition temperature drop from 500 degrees C to 350 degrees C can increase the energy efficiency from 33.5 % to 43.2 %, and two improved integration strategies have therefore been proposed. Mixing a part of NH3 with the exhaust gas from PEMFC anode to fuel MGT can reduce the NH3 decomposition demand and makes better use of waste heat from MGT. Integrating ADR with MGT combustor can lower the exhaust gas temperature and the efficiency loss when using high temperature NH3 decomposition catalyst. Both strategies can improve the system energy efficiency, to about 40% and 44% when NH3 decomposition temperature is 500 degrees C and 350 degrees C, respectively, and demonstrate better flexibility in adapting to changes in NH3 decomposition temperature.
Keyword ：
Ammonia decomposition Ammonia decomposition Ammonia energy Ammonia energy Power generation system Power generation system Proton exchange membrane fuel cell Proton exchange membrane fuel cell Thermochemical recuperation Thermochemical recuperation
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| GB/T 7714 | Lin, Li , Sun, Mingwei , Wu, Yifan et al. High-efficiency ammonia-fueled hybrid power generation system combining ammonia decomposition, proton exchange membrane fuel cell and micro gas turbine: A thermodynamic model and performance optimization [J]. | ENERGY CONVERSION AND MANAGEMENT , 2025 , 325 . |
| MLA | Lin, Li et al. "High-efficiency ammonia-fueled hybrid power generation system combining ammonia decomposition, proton exchange membrane fuel cell and micro gas turbine: A thermodynamic model and performance optimization" . | ENERGY CONVERSION AND MANAGEMENT 325 (2025) . |
| APA | Lin, Li , Sun, Mingwei , Wu, Yifan , Huang, Wenshi , Wu, Zeyun , Wang, Dabiao et al. High-efficiency ammonia-fueled hybrid power generation system combining ammonia decomposition, proton exchange membrane fuel cell and micro gas turbine: A thermodynamic model and performance optimization . | ENERGY CONVERSION AND MANAGEMENT , 2025 , 325 . |
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Ammonia decomposition for onsite hydrogen production has been regarded as an important reaction which links to efficient hydrogen storage, transport and utilization. However, it still remains challenging to develop efficient catalysts with robust stability for ammonia decomposition. Herein, an integrated strategy was employed to synthesize Ru/SiO2@N-CS via wrapping a thin layer of N-doped carbon onto the SiO2 sphere, following the anchor of Ru nanoparticles (NPs) onto the support. The obtained Ru/SiO2@N-CS (Ru loading: 1 wt%) shows a promising performance for ammonia decomposition, reaching 94.5 % at 550 degrees C with a gas hourly space velocity (GHSV) of 30 000 mL gcat-1 h- 1. The combination of the SiO2 as the core prevents the degradation of N-doped carbon layers and then enhance the durability of the catalysts, remaining stable after 50 h at evaluated temperatures. Adequate characterizations were used to illustrate the effect of microchemical environment on ammonia decomposition activity of Ru/SiO2@N-CS catalyst under different calcination atmosphere and the correlation between structure and performance.
Keyword ：
Ammonia decomposition Ammonia decomposition N-doped carbon N-doped carbon Ruthenium Ruthenium Stability Stability
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| GB/T 7714 | Huang, Yunyun , Ren, Hongju , Fang, Huihuang et al. Ru nanoparticles embedded in Ru/SiO2@N-CS for boosting hydrogen production via ammonia decomposition with robust lifespan [J]. | APPLIED SURFACE SCIENCE , 2024 , 669 . |
| MLA | Huang, Yunyun et al. "Ru nanoparticles embedded in Ru/SiO2@N-CS for boosting hydrogen production via ammonia decomposition with robust lifespan" . | APPLIED SURFACE SCIENCE 669 (2024) . |
| APA | Huang, Yunyun , Ren, Hongju , Fang, Huihuang , Ouyang, Dong , Chen, Chongqi , Luo, Yu et al. Ru nanoparticles embedded in Ru/SiO2@N-CS for boosting hydrogen production via ammonia decomposition with robust lifespan . | APPLIED SURFACE SCIENCE , 2024 , 669 . |
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Ammonia is an exceptional fuel for solid oxide fuel cells (SOFCs), because of the high content of hydrogen and the advantages of carbon neutrality. However, the challenge lies in its unsatisfactory performance at intermediate temperatures (500-600 degrees C), impeding its advancement. An electrolyte-supported proton-ceramic fuel cell (PCFC) was fabricated employing BaZr0.1Ce0.7Y0.2O3-delta (BZCY) as the electrolyte and Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) as the cathode. In this study, the performance of PCFC using NH3 as fuel within an operating temperature range of 500-700 degrees C was improved by adding an M(Ni,Ru)/CeO(2 )catalyst layer to reconstruct the anode surface. The electrochemical performance of direct ammonia PCFC (DA-PCFC) were improved to different extents. Compared to H-2 as fuel, the degradation ratio of peak power densities (PPDs) of Ni/CeO2-loaded PCFC fueled with NH3 decreased at 700-500 degrees C, with a decrease to 13.3% at 700 degrees C and 30.7% at 500 degrees C. The findings indicate that Ru-based catalysts have a greater promise for direct ammonia SOFCs (DA-SOFCs) at operating temperatures below 600 degrees C. However, the enhancement effect becomes less significant above 600 degrees C when compared to Ni-based catalysts.
Keyword ：
ammonia ammonia anode anode M/CeO2 catalyst layer M/CeO2 catalyst layer proton-ceramic fuel cell (PCFC) proton-ceramic fuel cell (PCFC)
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| GB/T 7714 | Li, Xiaoxiao , Chen, Jiangping , Huang, Yunyun et al. Performance-enhanced direct ammonia protonic ceramic fuel cells using CeO2-supported Ni and Ru catalyst layer [J]. | FRONTIERS IN ENERGY , 2024 , 18 (6) : 875-884 . |
| MLA | Li, Xiaoxiao et al. "Performance-enhanced direct ammonia protonic ceramic fuel cells using CeO2-supported Ni and Ru catalyst layer" . | FRONTIERS IN ENERGY 18 . 6 (2024) : 875-884 . |
| APA | Li, Xiaoxiao , Chen, Jiangping , Huang, Yunyun , Fang, Huihuang , Chen, Chongqi , Zhong, Fulan et al. Performance-enhanced direct ammonia protonic ceramic fuel cells using CeO2-supported Ni and Ru catalyst layer . | FRONTIERS IN ENERGY , 2024 , 18 (6) , 875-884 . |
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