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Heterostructured Pd/PdO nanowires for selective and efficient CO_(2) electroreduction to CO

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Journal of Energy Chemistry 2022年第7期31卷 407-413,I0011页

作者： tian-jiao wang Wen-Sheng Fang Yi-Ming Liu Fu-Min Li Pei Chen Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province Key Laboratory of Applied Surface and Colloid Chemistry(Ministry of Education)Shaanxi Key Laboratory for Advanced Energy DevicesSchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710062ShaanxiChina School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074HubeiChina

Palladium(Pd) nanostructures are highly promising electrocatalysts for the carbon dioxide electrochemical reduction(CO_(2) ER). At present, it is still challenge for the synthesis of Pd nanostructures with high activity, selectivity and stability. In this work, a facile PdII-complex pyrolysis method is applied to synthesize the high-quality one-dimensional heterostructured Pd/Pd O nanowires(Pd/Pd O H-NWs).The as-prepared Pd/Pd O H-NWs have a large electrochemically active surface area, abundant defects and Pd/Pd O heterostructure. Electrochemical measurement results reveal that Pd/Pd O H-NWs exhibit up to 94% CO Faraday efficiency with a current density of 11.6 m A cm^(-2) at an applied potential of -0.8 V. Meanwhile, Pd/Pd O H-NWs can achieve a stable catalytic process of 12 h for CO_(2) ER. Such outstanding CO_(2) ER performance of Pd/Pd O H-NWs has also been verified in the flow cell test. The density functional theory calculations indicate that Pd/Pd O heterostructure can significantly weaken the CO adsorption on Pd sites, which improves the CO tolerance and consequently enhances the catalytic performance of Pd/Pd O H-NWs for CO_(2) ER. This work highlights a facile complex pyrolysis strategy for the synthesis of Pd-based CO_(2) ER catalysts and provides a new application instance of metal/metal oxide heterostructure in electrocatalysis.

关键词： Pd/PdO nanowires Heterostructure Carbon dioxide electrochemical reduction Carbon monoxide Faraday efficiency

Interfacial engineering of holey platinum nanotubes for formic acid electrooxidation boosted water splitting

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Journal of Energy Chemistry 2023年第2期77卷 209-216,I0006页

作者： Zi-Xin Ge Yu Ding tian-jiao wang Feng Shi Pu-Jun Jin Pei Chen Bin He Shi-Bin Yin Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province Key Laboratory of Applied Surface and Colloid Chemistry(Ministry of Education)Shaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710062ShaanxiChina College of New Materials and New Energies Shenzhen Technology UniversityShenzhen 518118GuangdongChina MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004GuangxiChina

Both structure and interface engineering are highly effective strategies for enhancing the catalytic activity and selectivity of precious metal *** this work,we develop a facile pyrolysis strategy to synthesize the high-quality holey platinum nanotubes(Pt-H-NTs)using nanorods-like Pt^(Ⅱ)-phenanthroline(PT)coordination compound as self-template and self-reduction ***,an up-bottom strategy is used to further synthesize polyallylamine(PA)modified Pt-H-NTs(Pt-HNTs@PA).PA modification sharply promotes the catalytic activity of Pt-H-NTs for the formic acid electrooxidation reaction(FAEOR)by the direct reaction ***,PA modification also elevates the catalytic activity of Pt-H-NTs for the hydrogen evolution reaction(HER)by the proton enrichment at electrolyte/electrode *** from the high catalytic activity of Pt-H-NTs@PA for both FAEOR and HER,a two-electrode FAEOR boosted water electrolysis system is fabricated by using Pt-H-NTs@PA as bifunctio nal *** FAEOR boosted water electrolysis system only requires the operational voltage of 0.47 V to achieve the high-purity hydrogen production,showing an energy-saving hydrogen production strategy compared to traditional water electrolysis system.

关键词： Holey platinum nanotubes Chemical functionalization Formic acid oxidation reaction Hydrogen evolution reaction Water splitting

Establishing a model to measure and predict the quality of gastrointestinal endoscopy

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World Journal of Gastroenterology 2019年第8期25卷 1024-1030页

作者： Luo-Wei wang Han Lin Lei Xin Wei Qian tian-jiao wang Jian-Zhong Zhang Qian-Qian Meng Bo tian Xu-Dong Ma Zhao-Shen Li Digestive Endoscopy Center Department of GastroenterologyChanghai HospitalNaval Medical UniversityShanghai 200433China Unimed Scientific Inc. Wuxi 214000Jiangsu ProvinceChina Department of Intensive Care Unit Shanghai East HospitalTongji UniversityShanghai 200120China Department of Medical Quality Medical and Health AdministrationNational Health Commission of ChinaBeijing 100044China

BACKGROUND Tens of millions of gastrointestinal endoscopic procedures are performed every year in China,but the quality varies significantly and related factors are *** endoscopist-and endoscopy division-related factors may be useful to establish a model to measure and predict the quality of *** To establish a model to measure and predict the quality of gastrointestinal endoscopic procedures in China's *** Selected data on endoscopy experience,equipment,facility,qualification of endoscopists,and other relevant variables were collected from the National Database of Digestive Endoscopy of *** multivariable logistic regression analysis was used to identify the potential predictive variables for occurrence of medical malpractice and patient *** and nonlinear regressions were used to establish models to predict incidence of endoscopic *** In 2012,gastroscopy/colonoscopy-related complications in China's Mainland included bleeding in 4,359 cases(0.02%)and perforation in 914(0.003%).Endoscopic-retrograde-cholangiopancreatography-related complications included severe acute pancreatitis in 593 cases(0.3%),bleeding in 2,151(1.10%),perforation in 257(0.13%)and biliary infection in 4,125(2.11%).Moreover,1,313(5.0%)endoscopists encountered with medical malpractice,and 5,243(20.0%)encountered with the disturbance from *** length of endoscopy experience,weekly working hours,weekly night shifts,annual vacation days and job satisfaction were predictors for the occurrence of medical malpractice and patient ***,the length of endoscopy experience and the ratio of endoscopists to nurses were not adequate to establish an effective predictive model for endoscopy *** The workload and job satisfaction of endoscopists are valuable predictors for medical malpractice or patient *** comprehensive data are needed to establish quality-predictive models for endosco

关键词： Endoscopy Gastroscopy Colonoscopy Endoscopic retrograde cholangiopancreatography Quality control Predictive model Performance predictor

Porous palladium phosphide nanotubes for formic acid electrooxidation

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Carbon Energy 2022年第3期4卷 283-293页

作者： tian-jiao wang Yu-Chuan Jiang Jia-Wei He Fu-Min Li Yu Ding Pei Chen Yu Chen School of Materials Science and Engineering Key Laboratory of Macromolecular Science of Shaanxi ProvinceKey Laboratory of Applied Surface and Colloid Chemistry(Ministry of Education)Shaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologyShaanxi Normal UniversityXi'anChina

The development of an efficient catalyst for formic acid electrocatalytic oxidation reaction(FAEOR)is of great significance to accelerate the commercial application of direct formic acid fuel cells(DFAFC).Herein,palladium phosphide(PdxPy)porous nanotubes(PNTs)with different phosphide content(i.e.,Pd3P and Pd5P2)are prepared by combining the self-template reduction method of dimethylglyoxime-Pd(II)complex nanorods and succedent phosphating *** the reduction process,the self-removal of the template and the continual inside-outside Ostwald ripening phenomenon are responsible for the generation of the one-dimensional hollow and porous *** the basis of the unique synthetic procedure and structural advantages,Pd3P PNTs with optimized phos phide content show outstanding electroactivity and stability for *** portantly,the strong electronic effect between Pd and P promotes the direct pathway of FAEOR and inhibits the occurrence of the formic acid decomposition reaction,which effectively enhances the FAEOR electroactivity of Pd3P *** view of the facial synthesis,excellent electroactivity,high stability,and unordinary selectivity,Pd3P PNTs have the potential to be an efficient anode electrocatalyst for DFAFC.

关键词： electronic effect formic acid oxidation reaction palladium phosphide porous nanotubes self-template method

Single atomic cobalt electrocatalyst for efficient oxygen reduction reaction

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eScience 2022年第4期2卷 399-404页

作者： Peng Rao Daoxiong Wu tian-jiao wang Jing Li Peilin Deng Qi Chen Yijun Shen Yu Chen Xinlong tian State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Lab of Fine ChemistrySchool of Chemical Engineering and TechnologyHainan UniversityHaikou570228China School of Materials Science and Engineering Shaanxi Normal UniversityXi'an710062China

Robust oxygen reduction reaction(ORR)catalysts are essential for energy storage and conversion devices,but their development remains ***,we design a single-atom catalyst featuring isolated Co anchored on nitrogen-doped carbon(Co-SAC/NC)via a highly efficient“plasma-bombing”*** a high loading(up to 2.5wt%),the well-dispersed single Co atoms in Co-SAC/NC give it robust ORR performance in an alkaline *** also demonstrates excellent battery performance when implemented as the air-cathode catalyst in a zinc-air battery(ZAB).Theoretical calculations reveal that the Co-N_(4)moiety experiences an“extraction/recovery”structural evolution during the ORR process,and the reaction's rate-determining step is the formation of OOH∗(reaction intermediate).This work provides a new strategy for designing robust ORR catalysts for high-performance ZABs and other energy-conversion devices.

关键词： Plasma-bombing Zinc-air batteries Durability Theoretical calculations Single-atom catalysts

Application of an artificial intelligence system for endoscopic diagnosis of superficial esophageal squamous cell carcinoma

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World Journal of Gastroenterology 2022年第37期28卷 5483-5493页

作者： Qian-Qian Meng Ye Gao Han Lin tian-jiao wang Yan-Rong Zhang Jian Feng Zhao-Shen Li Lei Xin Luo-Wei wang Department of Gastroenterology Changhai HospitalShanghai 200433China Qingdao Medcare Digital Engineering Co.Ltd. Qingdao Medcare Digital Engineering Co.Ltd.Qingdao 26600Shandong ProvinceChina

BACKGROUND Upper gastrointestinal endoscopy is critical for esophageal squamous cell carcinoma(ESCC)detection;however,endoscopists require long-term training to avoid missing superficial *** To develop a deep learning computer-assisted diagnosis(CAD)system for endoscopic detection of superficial ESCC and investigate its application *** We configured the CAD system for white-light and narrow-band imaging modes based on the YOLO v5 algorithm.A total of 4447 images from 837 patients and 1695 images from 323 patients were included in the training and testing datasets,*** experts and two non-expert endoscopists reviewed the testing dataset independently and with computer *** diagnostic performance was evaluated in terms of the area under the receiver operating characteristic curve,accuracy,sensitivity,and *** The area under the receiver operating characteristics curve,accuracy,sensitivity,and specificity of the CAD system were 0.982[95%confidence interval(CI):0.969-0.994],92.9%(95%CI:89.5%-95.2%),91.9%(95%CI:87.4%-94.9%),and 94.7%(95%CI:89.0%-97.6%),*** accuracy of CAD was significantly higher than that of non-expert endoscopists(78.3%,P<0.001 compared with CAD)and comparable to that of expert endoscopists(91.0%,P=0.129 compared with CAD).After referring to the CAD results,the accuracy of the non-expert endoscopists significantly improved(88.2%vs 78.3%,P<0.001).Lesions with Paris classification type 0-IIb were more likely to be inaccurately identified by the CAD *** The diagnostic performance of the CAD system is promising and may assist in improving detectability,particularly for inexperienced endoscopists.

关键词： Computer-aided diagnosis Artificial intelligence Deep learning Esophageal squamous cell carcinoma Early detection of cancer Upper gastrointestinal endoscopy

Au core-PtAu alloy shell nanowires for formic acid electrolysis

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Journal of Energy Chemistry 2022年第2期31卷 94-102页

作者： Qi Xue Xin-Yu Bai Yue Zhao Ya-Nan Li tian-jiao wang Hui-Ying Sun Fu-Min Li Pei Chen Pujun Jin Shi-Bin Yin Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province Key Laboratory of Applied Surface and Colloid Chemistry(MOE)Shaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710062ShaanxiChina MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004GuangxiChina

Inefficient electrocatalysts and high-power consumption are two thorny problems for electrochemical hydrogen(H2)production from acidic water *** we report the one-pot precise synthesis of ultrafine Au core-Pt Au alloy shell nanowires(Au@PtxAu UFNWs).Among them,Au@Pt_(0.077) Au UFNWs exhibit the best performance for formic acid oxidation reaction(FAOR)and hydrogen evolution reaction(HER),which only require applied potentials of 0.29 V and-22.6 m V to achieve a current density of 10 m A cm^(-2),*** corresponding formic acid electrolyzer realizes the electrochemical H2 production at a voltage of only 0.51 V with 10 m A cm^(-2) current *** functional theory(DFT)calculations reveal that the Au-riched Pt Au alloy structure can facilitates the direct oxidation pathway of FAOR and consequently elevates the FAOR activity of Au@Pt_(0.077) Au *** work provides meaningful insights into the electrochemical H_(2) production from both the construction of advanced bifunctional electrocatalysts and the replacement of OER.

关键词： Au core-PtAu alloy shell nanowires Formic acid oxidation reaction Reaction pathway Hydrogen evolution reaction Acidic water electrolysis

A biomimetic gradient porous cage with a micro-structure for enhancing mechanical properties and accelerating osseointegration in spinal fusion

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Bioactive Materials 2023年第5期23卷 234-246页

作者： Cheng-Qi Jia Zhen Zhang Shi-Qi Cao tian-jiao wang Hai-Chao Yu Wen-Xiang wang Bo-Min Guo Xiong-Ying Qiu Yong-Gang You Fan-Qi Hu Jun Zhao Xue-Song Zhang Medical School of Chinese PLA Beijing100853China Department of Orthopedics Chinese PLA General HospitalBeijing100853China Department of Orthopedics of TCM Clinical Unit 6th Medical CenterChinese PLA General HospitalBeijing100853China Research Institute of Aerospace Special Materials and Processing Technology Beijing100074China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China Academy of Military Medical Sciences Academy of Military SciencesBeijing100080China University of Chinese Academy of Sciences Beijing100049China

Objectives:Spinal fusion is a widely employed treatment of patients with degenerative disc disease,in which a cage is used to replace the disc for spinal *** it often fails for insufficient mechanical strength and poor ***,we designed a polyether-ether-ketone(PEEK)/tantalum(Ta)composite cage with a biomimetic gradient porous micro-structure,simultaneously enhancing mechanical properties and accelerating osseointegration in spinal *** and methods:In the study,based on the mechanical performances of PEEK and osteogenic potential of Ta,and the three-dimensional(3D)structures of cuttlebone and vertebra,the cages were respectively 3D printed by pure PEEK,PEEK with 5 wt%Ta(PEEK/Ta-5),PEEK with 10 wt%Ta(PEEK/Ta-10)and PEEK with 15 wt%Ta(PEEK/Ta-15),then verifiedin vitroand in sheep cervical fusion model ***:Vertebral Gyroid structure PEEK/Ta-15 cage exhibited superior mechanical properties than Cuttlebone-like structure PEEK/Ta-15 cage,closer to the cervical ***,PEEK/Ta-15 cage with higher Ta microparticles in PEEK provided a biomimetic gradient porous micro-structure with higher surface energy,guiding cell biological behavior,promoting new bone penetration,and accelerating osseointegrationin vivo.Conclusion:In conclusion,the study designed a biomimetic gradient porous cage with a micro-structure for enhancing mechanical properties,accelerating osseointegration and forming an anatomical lock in the fusion segment through composites,mechanical efficiency,surface extension,and pores.

关键词： Biomimetic Porous Composite Osseointegration Spinal fusion

Platinum-Tellurium Alloy Metallene Toward Formic Acid Oxidation Reaction

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Renewables 2023年第1期1卷 90-99页

作者： Ya-Nan Li Qing-Ling Hong Bo-Qiang Miao tian-jiao wang Yu Ding Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province School of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710062

Engineering the composition and/or morphology of noble metal nanocrystals is a highly effective strategy for enhancing their electrocatalytic ***,metallenes with specific chemical and physical properties have increasingly attracted attention in the field of *** this work,two-dimensional ultrathin platinum-tellurium alloy metallene(PtTe A-ML)is synthesized using a conventional liquid-phase chemical reduction *** high atomic utilization as well as alloy effect endow PtTe A-ML with preeminent electrocatalytic activity for the formic acid oxidation reaction(FAOR).Specifically,the direct oxidation pathway of FAOR can be completely achieved using PtTe A-ML,which suppresses the production of toxic carbon monoxide(CO)intermediates and improves the reaction kinetics of ***,the FAOR activity of PtTe AML in acidic media is 43 and 5.6 times higher than that of commercial Pt and Pd nanocrystals,***,PtTe A-ML also exhibits excellent electrocatalytic activity for the CO oxidation reaction because of the introduction of oxygenophilic Te atoms and electron transfer between Pt and Te,which elevates the durability of PtTe A-ML for *** study provides a simple synthesis strategy for PtTe A-ML and demonstrates that PtTe A-ML has a promising practical prospect for direct formic acid fuel cells.

关键词： metallene PtTe alloy electrocatalysis formic acid electrooxidation fuel cells