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Nano Research 2022年第1期15卷 528-534页

作者： Chenqi Shen Pengtang Wang leigang li Xiaoqing Huang Qi Shao College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Syngas(CO+H_(2))is the incredibly important feedstock for producing synthetic fuels and various value-added ***_(2) electrochemical reduction to syngas is an environmental-friendly and sustainable approach,but still challenging to produce tunable syngas with a wide ratio of CO+H_(2).Herein,by modulating the structure and phase,we have successfully obtained a series of copper-indium(Cu-ln)catalysts,which are efficient for producing syngas with tunable CO+H_(2) ratios.A series of Culn bimetallic catalysts with different structures from hollow sphere to two-layer hollow sphere and different phases from CuO to CU_(2)O are *** find that the CO and H2 are the only gaseous products,in which the CCD/H_(2) ratios can be readily tuned from 1.2±0.1 to 9.0±1.5 by simply controlling the thermal annealing *** also exhibits high durability during a 10-h *** unique performance is attributed to the modulated In enrichment on the Cu surfaces during the CO_(2) reduction reaction,which causes the differences in binding energies for key reaction intermediates,thus resulting in the tunable composition of *** present work emphasizes a simple yet efficient phase and structure modulating strategy for designing potential electrocatalysts for producing syngas with widely tunable CO+H_(2) ratios.

关键词： copper indium phase-engineering CO_(2)reduction syngas

One-dimensional iridium-based nanowires for efficient water electrooxidation and beyond

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Nano Research 2022年第2期15卷 1087-1093页

作者： leigang li Pengtang Wang Zifang Cheng Qi Shao Xiaoqing Huang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

The sluggish reaction kinetics of oxygen evolution reaction(OER)has largely lowered the efficiency of electrochemical water *** represents one of the state-of-the-art electrocatalysts for promoting OER especially in acidic ***,it remains a formidable challenge to synthesize high-quality one-dimensional(1D)Ir-based nanostructures for improved electrocatalytic ***,a template-assisted synthesis method is reported wherein 1D porous Ir-Te nanowires(Ir-Te NWs)are synthesized with Te NWs serving as the *** Ir-Te NWs exhibit highly enhanced OER performance compared to commercial IrO_(2) and Ir/*** detail,the overpotentials to reach 10 mA cm^(-2) are 248 and 284 mV in 1 M KOH and 0.5 M H2S04,respectively,much lower than those of commercial *** Ir-Te NWs also show smaller Tafel slopes than commercial IrO_(2) and Ir/C,signifying faster reaction ***,much more durable OER activity can be maintained for Ir-Te NWs with negligible decay during 25 and 20 h stability tests in 1 M KOH and 0.5 M H_(2)SO_(4),*** analysis indicates that the significantly improved OER performance of Ir-Te NWs could be ascribed to the larger electrochemical surface area and smaller electrical *** significantly,the templated synthesis of Ir-Te NWs can be facilely extended to the fabrication of other metal-Te NWs including Ru-Te,Rh-Te and Pt-Te *** design and synthesis of 1D metal-based NWs in this work provide important inspiration for the synthesis of diversified 1D metallic nanostructures with distinctly enhanced catalytic performance and beyond.

关键词： Ir template nanowire water splitting oxygen evolution reaction

Partially hydroxylated ultrathin iridium nanosheets as efficient electrocatalysts for water splitting

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National Science Review 2020年第8期7卷 1340-1348页

作者： Zifang Cheng Bolong Huang Yecan Pi leigang li Qi Shao Xiaoqing Huang College of Chemistry Chemical Engineering and Materials Science Soochow University Department of Applied Biology and Chemical Technology Hong Kong Polytechnic University

Ultrathin two-dimensional（2D） materials have attracted considerable attention for their unique physicochemical properties and promising applications; however, preparation of freestanding ultrathin 2D noble metal remains a significant challenge. Here, for the first time, we report use of a wet-chemical method to synthesize partially hydroxylated ultrathin Ir nanosheets（Ir-NSs） of only five to six atomic layers’ thickness. Detailed analysis indicates that the growth confinement effect of carbon monoxide and the partially hydroxylated surface play a critical role in formation of the ultrathin structure. The ultrathin Ir-NSs exhibit excellent performance for both the hydrogen evolution reaction and oxygen evolution reaction in a wide p H range, outperforming the state-of-the-art Pt/C and IrO;, respectively. Density-functional theory calculations reveal that the partial hydroxylation not only enhances the surface electron transfer between Ir-sites and intermediate O-species, but also guarantees efficient initial activation of bond cleavage of H-O-H for first-step H;O splitting. This, ultimately, breaks through barriers to full water splitting, with efficient electron transfer essentially maintained.

关键词： iridium nanosheet 2D material hydroxylation overall water splitting

Modulate the electronic structure of Cu_(7)S_(4)nanosheet on TiO_(2)for enhanced photocatalytic hydrogen evolution

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Nano Research 2023年第4期16卷 4488-4493页

作者： Wenqiang liu Huiping Peng leigang li Mingmin Wang Hongbo Geng Xiaoqing Huang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China School of Materials Engineering Changshu Institute of TechnologyChangshu 215500China

TiO_(2)is a promising photocatalyst due to its high thermodynamic stability and ***,its applications have been still limited because of the high recombination rate of electron-hole ***,we show that by combining heterojunction construction and electronic structure regulation,the electron-hole pairs in TiO_(2)can be effectively separated for enhanced photocatalytic hydrogen *** optimized Cu_(7)S_(4)nanosheet decorated TiO_(2)achieves much enhanced H_(2)evolution rate(11.5 mmol·g−1·h−1),which is 13.8 and 4.2 times of that of TiO_(2)and Cu_(7)S_(4)/TiO_(2),*** results of photoluminescence spectroscopy,transient photocurrent spectra,ultraviolet-visible diffuse reflectance spectra,and electrochemical impedance spectroscopy collectively demonstrate that the enhanced photocatalytic performance of Air-Cu_(7)S_(4)/TiO_(2)is attributed to the effective separation of charge carriers and widened photoresponse *** electron paramagnetic resonance and X-ray photoelectron spectroscopy results indicate that the increase of Cu2+in the Cu_(7)S_(4)nanosheet after calcination can promote the charge *** work provides an effective method to improve the electron migration rate and charge separation of TiO_(2),which holds great significance for being extended to other material systems and beyond.

关键词： Cu_(7)S_(4)nanosheet Cu^(2+) electronic structure regulation heterojunction photocactalytic hydrogen evolution

Selective electrocatalytic CO2 reduction enabled by SnO2 nanoclusters

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Journal of Energy Chemistry 2019年第10期28卷 93-96页

作者： Hui Yang Yang Huang Jun Deng Yunling Wu Na Han Chenyang Zha leigang li Yanguang li Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University

The development of high-performance electrocatalysts holds the decisive key to the electrochemical CO2 reduction toward value-added products. Formic acid or formate is a desirable reduction product, but its selective production is often challenging. Tin based-materials have attracted great attention for formate production, and yet their performances are far from satisfactory. In this study, we reported the preparation of SnO2 nanoclusters from the controlled self-polymerization of dopamine together with SnO32-, followed by the mild-temperature calcination. The final product consisted of large primary particles that were further made of small secondary SnO2 nanocrystals. When evaluated as the electrocatalyst for CO2 reduction in 0.5 M NaHCO3, our material exhibited impressive activity, selectivity and stability for the selective CO2 reduction to formate. A peak formate Faradaic efficiency of^73% and large partial current density of 16.3 mA/cm2 was achieved at -0.92 V versus reversible hydrogen electrode.

关键词： CO2 reduction reaction Electrocatalysts Formate Tin oxide Selectivity

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Face-centered cubic structured RuCu hollow urchin-like nanospheres enable remarkable hydrogen evolution catalysis

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Science China Chemistry 2022年第1期65卷 87-95页

作者： Juntao Zhang Jiabo Le Yuanting Dong lingzheng Bu Ying Zhang Jun Cheng leigang li Xiaoqing Huang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China

Ruthenium(Ru)is one of the most promising metals for its versatility in driving a wide range of catalytic ***,owing to the intrinsic preference of hexagonal close-packed(hcp)phase for bulk Ru,currently,it is still challenging to construct Ru-based nanomaterials with face-centered-cubic(fcc)phase for optimizing their performance towards potential ***,we report a facile wet-chemical method to directly create unconventional fcc-structured Ru-copper hollow urchin-like nanospheres(fcc-RuCu HUNSs)as a class of efficient pH-universal hydrogen evolution reaction(HER)***,this synthetic strategy can be expanded to prepare other fcc-Ru-based alloy ***,the novel fcc-RuCu HUNSs exhibit superior HER performance with the overpotential of only 25,34,40,and 26 m V to reach the current density of 10 mA cm^(-2)in 0.5 M H_(2)SO_(4),0.05 M H_(2)SO_(4),0.1 M KOH,and 1 M KOH,respectively,much lower than those of hcpRuCu HUNSs and commercial Pt/*** functional theory(DFT)calculations further indicate that their excellent pH-universal HER performance results from the optimized adsorption free energy of H and work *** work highlights the importance of phase control to design high-efficiency nanocatalysts for relevant catalytic reactions in energy conversion.

关键词： ruthenium phase control face-centered cubic hydrogen evolution catalysis pH-universal

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Novel vertically aligned nanocomposite of Bi_(2)WO_(6)-Co_(3)O_(4) with room-temperature multiferroic and anisotropic optical response

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Nano Research 2021年第12期14卷 4789-4794页

作者： leigang li Shikhar Misra Xingyao Gao Juncheng liu Han Wang Jijie Huang Bruce Zhang Ping Lu Haiyan Wang School of Materials Engineering Purdue UniversityWest LafayetteIndiana47907USA School of Electrical and Computer Engineering Purdue UniversityWest LafayetteIndiana47907USA Sandia National Laboratory AlbuquerqueNew Mexico87185USA

A new vertically aligned nanocomposite(VAN)structure based on two-dimensional(2D)layered oxides has been designed and self-assembled on both LaAlO_(3)(001)and SrTiO3(001)*** new VAN structure consists of epitaxially grown Co_(3)O_(4) nanopillars embedded in the Bi_(2)WO_(6) matrix with a unique 2D layered structure,as evidenced by the microstructural *** property measurements show that the new Bi_(2)WO_(6)-Co_(3)O_(4) VAN structure exhibits strong ferromagnetic and piezoelectric response at room temperature as well as anisotropic permittivity *** work demonstrates a new approach in processing multifunctional VANs structure based on the layered oxide systems towards future nonlinear optics,ferromagnets,and multiferroics.

关键词： vertically aligned nanocomposite(VAN) multiferroics Aurivillius oxides layered oxides Co_(3)O_(4) Bi_(2)WO_(6)

Copper-Bismuth Bimetallic Microspheres for Selective Electrocatalytic Reduction of CO2 to Formate

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Chinese Journal of Chemistry 2019年第5期37卷 497-500页

作者： lin Jia Hui Yang Jun Deng Junmei Chen Yuan Zhou Pan Ding leigang li Na Han Yanguang li Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Soochow University Suzhou Jiangsu 215123 China

Summary of main observation and conclusion Electrocatalytic carbon dioxide reduction holds great promise for reducing the atmospheric CO2 level and alleviating the energy crisis. High-performance electrocatalysts are often required in order to lower the high overpotential and expedite the sluggish reaction kinetics of CO2 electroreduction. Copper is a promising candidate metal. However, it usually suffers from the issues of poor stability and low product selectivity. In this work, bimetallic Cu-Bi is obtained by reducing the microspherical copper bismuthate (CuBi2O4) for selectively catalyzing the CO2 reduction to formate (HCOO-). The bimetallic Cu-Bi electrocatalyst exhibits high activity and selectivity with the Faradic efficiency over 90% in a wide potential window. A maximum Faradaic efficiency of ~95% is obtained at -0.93 V versus reversible hydrogen electrode. Furthermore, the catalyst shows high stability over 6 h with Faradaic efficiency of -95%. This study provides an important clue in designing new functional materials for CO2 electroreduction with high activity and selectivity.

关键词： main carbon CO2

Atomically isolated Pd sites within Pd-S nanocrystals enable trifunctional catalysis for direct,electrocatalytic and photocatalytic syntheses of H_(2)O_(2)

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Nano Research 2022年第3期15卷 1861-1867页

作者： Tang Yang Chengyong Yang Jiabo Le Zhiyong Yu lingzheng Bu leigang li Shuxing Bai Qi Shao Zhiwei Hu Chih-Wen Pao Jun Cheng Yonggang Feng Xiaoqing Huang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Max-Planck-Institute for Chemical Physics of Solids Nöthnitzer Street 40Dresden 01187Germany “National Synchrotron Radiation Research Center” Hsinchu 30076TaiwanChina

Although high-efficiency production of hydrogen peroxide(H_(2)O_(2))can be realized separately by means of direct,electrochemical,and photocatalytic synthesis,developing versatile catalysts is particularly challenging yet ***,for the first time we reported that palladium-sulphur nanocrystals(Pd-S NCs)can be adopted as robust and universal catalysts,which can realize the efficient O_(2) conversion by three *** a result,Pd-S NCs exhibit an excellent selectivity(89.5%)to H_(2)O_(2)with high productivity(133.6 mol·kgcat^(−1)·h^(−1))in the direct synthesis,along with the significantly enhanced H_(2)O_(2)production activity and stability via electrocatalytic and photocatalytic *** is demonstrated that the isolated Pd sites can enhance the adsorption of O_(2) and inhibit its O–O bond dissociation,improving H_(2)O_(2)selectivity and reducing H_(2)O_(2)*** study confirms that the difference in surface atom composition and arrangement is the key factor for different ORR mechanisms on Pd NCs and Pd-S NCs.

关键词： Pd-S universality direct synthesis of H_(2)O_(2) oxygen reduction photocatalysis

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足踝部皮肤缺损的修复

中国修复重建外科杂志 2006年第12期20卷 1202-1204页

作者：宫旭路来金李雷刚吉林大学第一医院手足外科长春130021 吉林省武警医院骨科

目的探讨足踝部皮肤缺损的修复方法及疗效。方法2000年1月~2005年10月,对36例足踝部皮肤缺损分别采用同侧外踝上皮瓣或逆行腓肠神经营养皮瓣修复,其中男35例,女1例。年龄6~62岁,平均38岁。损伤原因:机器伤12例,车祸伤22例,感染1例,冻伤... 详细信息

目的探讨足踝部皮肤缺损的修复方法及疗效。方法2000年1月~2005年10月,对36例足踝部皮肤缺损分别采用同侧外踝上皮瓣或逆行腓肠神经营养皮瓣修复,其中男35例,女1例。年龄6~62岁,平均38岁。损伤原因:机器伤12例,车祸伤22例,感染1例,冻伤1例。其中急诊行皮瓣修复24例,12例于伤后7 d^1个月手术,修复部位包括足背、足跟、前足和内、外踝,皮肤缺损范围5 cm×4 cm^20 cm×10 cm。其中外踝上皮瓣15例15个皮瓣,切取皮瓣范围5 cm×4 cm^15 cm×8 cm;逆行腓肠神经营养皮瓣21例22个皮瓣,切取皮瓣范围6 cm×4 cm^20 cm×10 cm。就其术后疗效及两种皮瓣的成活率进行比较。结果术后外踝上皮瓣完全成活10个,完全坏死3个,尖端部分坏死2个。逆行腓肠神经营养皮瓣完全成活21个,其中3个尖端出现表皮坏死;1个在术中即出现动脉供血不足,改行其他方法修复。术后经3周~6个月随访,两种皮瓣修复后的疗效相似,皮肤质地、厚度与足踝部相接近,皮瓣的痛、触觉为S0~S1。修复足跟跖侧的两种皮瓣术后均较臃肿,皮瓣与跟骨之间存在滑动,皮瓣表面出现压迫性表皮坏死。结论外踝上皮瓣适用于内外踝部、足背近侧等距皮瓣供区较近的部位,皮肤缺损面积相对较小的创面;对于缺损较大或距离踝关节较远的足部创面,应采用逆行腓肠神经营养皮瓣,但有踝关节动脉网破坏严重时需谨慎应用。

关键词：足踝部逆行腓肠神经皮瓣外踝上皮瓣修复

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