Nature Communications
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2025
·Vol. 16
·期 1
·1-11
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IF 15.7
Wang Zhouzhou,Ye Haotian,Li Yixin,Sheng Bowen,Wang Ping,Ou Pengfei,Li Xiao-Yan,Yu Tianqi,Huang Zijian,Li Jinglin,Yu Ying,Wang Xinqiang,Huang Zhen,Zhou Baowen
Light-driven bioethanol dehydration offers attractive outlooks for the sustainable production of ethylene. Herein, a surface-hydrogenated CrMnO x is coupled with GaN nanowires (GaN@CMO-H) for light-driven ethanol dehydration to ethylene. Through combined experimental and computational investigations, a surface hydrogen-replenishment mechanism is proposed to disclose the ethanol dehydration pathway over GaN@CMO-H. Moreover, the surface-hydrogenated GaN@CMO-H can significantly lower the reaction energy barrier of the C 2 H 5 OH-to-C 2 H 4 conversion by switching the rate-determining reaction step compared to both GaN and GaN@CMO. Consequently, the surface-hydrogenated GaN@CMO-H illustrates a considerable ethylene production activity of 1.78 mol·g cat −1 ·h −1 with a high turnover number of 94,769 mole ethylene per mole CrMnO x . This work illustrates a new route for sustainable ethylene production with the only use of bioethanol and sunlight beyond fossil fuels.
研究领域:
材料科学
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催化化学
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可持续能源
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产品关联
DOI
PubMed
高影响因子
Nature Communications
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2025
·Vol. 16
·期 1
·1-14
·
IF 15.7
Chen Wei,Wang Danhao,Wang Weiyi,Liu Xin,Liu Yuying,Wang Chao,Kang Yang,Fang Shi,Yang Xudong,Gu Wengang,Luo Dongyang,Luo Yuanmin,Qu Zongtao,Zuo Chengjie,Kang Yi,Cheng Lin,Yan Wensheng,Hu Wei,Long Ran,He Jr-Hau,Liang Kang,Liu Sheng,Xiong Yujie,Sun Haiding
The development of an efficient and durable photoelectrode is critical for achieving large-scale applications in photoelectrochemical water splitting. Here, we report a unique photoelectrode composed of reconfigured gallium nitride nanowire-on-silicon wafer loaded with Au nanoparticles as cocatalyst that achieved an impressive applied bias photon-to-current efficiency of 10.36% under AM 1.5G one sun illumination while exhibiting stable PEC hydrogen evolution over 800 h at a high current density. Specifically, by tailoring the GaN nanowires via a simple alkaline-etching step to expose the inner (10 \(\bar{1}\bar{1}\) ) facets, we achieve a highly coupled semiconductor nanowire-cocatalyst heterointerface with strong electron interaction. The strongly coupled reconfigured GaN nanowire/Au heterointerface not only optimizes the electronic structure of Au nanoparticles to form abundant highly active interfacial regions, eventually realizing superior hydrogen evolution activity but also enables GaN nanowires to provide a stronger anchoring effect for Au nanoparticles, preventing the detachment of Au nanoparticles during the intense hydrogen evolution process. The proposed photoelectrode offers a feasible structure for overcoming the efficiency-reliability bottleneck of PEC devices for producing clean hydrogen fuel.
研究领域:
材料科学
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能源转换
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光催化
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Yixin Li,Lin Yao,Jinglin Li,Tianqi Yu,Liang Qiu,Muhammad Salman Nasir,Tao Wang,Md Afjalur Rahman,Nirmal Anand,Sharif Md. Sadaf,Baowen Zhou
Dry reforming of methane toward syngas (CH 4 + CO 2 = 2CO + 2H 2 ) presents a proper solution for depleting petroleum and climate change yet remains not industrialized. Herein, NiO x nanoparticles are coupled with GaN nanowires for this target. The as-designed hybrid of NiO x /GaN NWs demonstrates a low onset temperature of 280 o C for dry reforming of methane with a syngas activity of 121.7 mmol·g cat -1 ·h -1 and nearly 100% selectivity. Together with the outstanding stability, a turnover number of 40372 mole syngas per mole Ni species is achieved over 160 cycles without noticeable activity degradation. The correlative kinetic experiments, isotope experiments, in-situ spectroscopic characterizations, as well as density functional theory calculations reveal that the oxidized nickel species with O vacancies and its unique electronic interaction with GaN significantly reduce the apparent activation energy of the reaction, primarily contributing to the superior activity at low temperature. What is more, the evolution track of CH 4 and CO 2 to syngas was comprehensively studied at atomic level, disclosing an obvious anti-coking chemical loop with excellent stability. This work presents a strategy for efficient and stable dry reforming of methane toward syngas under mild conditions.
研究领域:
催化化学
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材料科学
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能源化学
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产品关联
DOI
高影响因子
Journal of Materiomics
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2022
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IF 8.589
Tao Han,Zexin Wu,Zhilong Deng,Xiaofeng Zhang,Sidi Yang,Cuicui Chen,Jiajia Zhu,Shufang Ding,Chunzhi Jiang
The narrow bandgap of the low-energy near-infrared (NIR) polymer would lead to overlap between adjacent energy levels, which is a major barrier to the preparation of Vis-NIR polymer bulk heterojunction (BHJ) photodetectors with small responsivity and photocurrent. In this study, a high-performance lateral inorganic-organic hybrid photodetector was constructed to eliminate this barrier by combining GaN nanowires (GaN-NWs) with PDPP3T:PC 61 BM-based BHJ. In stage one, high-quality GaN-NWs were synthesized by the catalyst-free CVD method. The mechanism for controlling GaN-NWs morphology by adjusting the NH 3 flow rate was revealed. In stage two, the GaN-NWs with large electron mobility were used to accelerate the transfer of photogenerated carriers in the BHJ layer. Finally, compared with the BHJ device, the BHJ/GaN device demonstrated obvious improvements in responsivity and photocurrent at the wavelength between 400 and 1000 nm. The responsivity and photocurrent increased over 20-fold at the NIR band of 800–900 nm. Besides, owing to the energy level gradient effect, the BHJ/GaN device has a response speed of 7.8/<5.0 ms, which increases over three orders of magnitude than that of the GaN-NWs-based device ( tr / tf : 7.1/10.9 s). Therefore, the novel device structure proposed in this work holds great potential for preparing high-performance Vis-NIR photodetectors.
研究领域:
材料科学
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光电子学
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DOI
高影响因子
CRYSTAL GROWTH & DESIGN
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2022
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IF 4.01
Baodan Liu,Qingyun Liu,Wenjin Yang,Jing Li,Xinglai Zhang,Shavkat Yuldashev,Jinlei Yao
Compared with polar c-axis GaN, nonpolar GaN crystals with different orientations show distinct optical and electrical properties and thus some promising and functional applications can be expected. In this work, we report the self-assembled nucleation and synthesis of nonpolar GaN nanowires through a conventional chemical vapor deposition approach and systematic investigation of their microstructures and crystallography using a high-resolution transmission electron microscope. Comparative optical studies on polar and nonpolar GaN nanowires using monochromic and spatially resolved cathodoluminescence spectroscopy demonstrate that nonpolar GaN nanowires show strong UV luminescence, and an obvious blue shift of the peak wavelength along the nanowire from the bottom to the top is observed, while the yellow band emission observed in polar GaN nanowires is not detected. The feasible synthetic strategy and the peculiar luminescence property of nonpolar GaN nanowires will provide predominant advantages and sufficient space for the fabrication of high-performance and high-efficiency optoelectronic nanodevices for functional applications.
研究领域:
材料科学
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光学工程
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纳米技术
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产品关联
DOI
高影响因子
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