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Low Temperature H_(2) Production from Formic Acid Aqueous Solution Catalyzed on Metal Doped Mo_(2)C

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Journal of Renewable materials 2020年第8期8卷 939-946页

作者： Shuaishuai Zhu Zhigang Pan Yaqiu Tao Yue Chen College of materials Science and Engineering Nanjing Tech UniversityNanjingChina State Key Laboratory of materials-Oriented Chemical Engineering Nanjing21009China

Hydrogen is recognized as a promising energy scours in the close future.Online hydrogen preparation from formic acid under mild reaction conditions causes extensive interests.Mo_(2)C and metal(Fe,Ni,Co,K)doped Mo_(2)C on granular activated carbon(GAC)were prepared and used as heterogeneous catalysts for H2 generation from formic acid on a fixed bed reactor at 100–250°C.The formic acid conversions on doped Mo_(2)C-Me/GAC are clearly improved,especially at lower reaction temperatures.Co doping presents outstanding effect on H2 selectivity and conversion rate compared to Ni and Fe.A 56.3%formic acid conversion was reached on Mo_(2)C-Co/GAC at 100°C,which triples that on Mo_(2)C/GAC at the same temperature.At 150°C,a high formic acid conversion over 90%was reached on Mo_(2)C-Co/GAC.These long lifetime catalysts with no precious metal provide a low cost route to hydrogen production from formic acid.

关键词： Hydrogen production energy storage and conversion Mo_(2)C/GAC metal doping formic acid decomposition carbon materials

Wetting Behavior of Graphite and CFC Composites by Cu-Ti Compacts

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Journal of Wuhan University of Technology(materials Science) 2018年第1期33卷 35-42页

作者：王珂毛样武 DENG Quanrong NIE Dunwei MOMBELLO Domenico Hubei Key Laboratory of Plasma Chemistry and Advanced materials Wuhan Institute of Technology Department of Applied Science and Technology Politecnico di Torino

The wetting behavior of Cu-Ti powder compacts with 22 wt %Ti and 50 wt %Ti on carbon materials, including graphite and carbon fiber reinforced carbon composites（CFC）, has been investigated in a vacuum using the sessile drop method. The equilibrium contact angles of Cu-22Ti（containing 22 wt%Ti） on the graphite and the CFC substrates at 1 253 K are 32 o and 26 o, respectively, whereas the equilibrium contact angle of 9° is obtained for Cu-50Ti（containing 50 wt%Ti） on both the graphite and the CFC substrates at 1 303 K.Microstructural analysis of the wetting samples shows that a thin TiC reaction layer is developed at the interfacial area and Ti-Cu intermetallic compounds are formed over the reaction layer. The investigation on the spreading kinetics of Cu-Ti compacts on carbon materials substrates at fixed temperatures reveals that the spreading is controlled by the interfacial reactions in the first stage and then by the diffusion of the active Ti from the drop bulk to the triple line in the later stage. The spreading is promoted by the intense reaction at higher Ti concentrations.

关键词： joining, wetting, interfaces, wetting carbon materials

Ultrafast room-temperature reduction of graphene oxide by sodium borohydride,sodium molybdate and hydrochloric acid

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Chinese Chemical Letters 2021年第1期32卷 543-547页

作者： Jun Hu Gang Kong Yanbin Zhu Chunshan Che School of materials Science and Engineering South China University of TechnologyGuangzhou 510641China

Since graphene-based materials have shown great potential in many fields,it is important to explore ultrafast and high-efficient methods to synthesize reduced graphene oxide(rGO) using inexpensive reducing agents under mild conditions.Here,we reported a novel method for the ultrafast chemical reduction of graphene oxide(GO) at room temperature using sodium borohydride(NaBH_(4)),sodium molybdate(Na_(2)MoO_(4)) and hydrochloric acid(HCl).The reduction was carried out within 2 min.A series of characterization results revealed that the obtained reduced graphene oxide has higher reduction degree than that synthesized by NaBH_(4) alone at high temperature.Moreover,rGO electrode based on the present reducing method exhibited a superior specific capacitance of 139.8 F/g at a current density of1 A/g,indicating that it can be used as electrode materials for supercapacitors.

关键词： carbon materials Reduced graphene oxide Sodium borohydride Sodium molybdate Hydrochloric acid Supercapacitors

Facile preparation of hydrogenated graphene by hydrothermal methods and the investigation of its ferromagnetism

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Chinese Chemical Letters 2021年第11期32卷 3596-3600页

作者： Yunpeng Wu Yi Feng Zhongyu He Deyang Yu Ying Xue Xilong Liu Leiyun Han Xudong Zhao Xiaoyang Liu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China

In this paper,a hydrothermal approach is utilized for the first time in integrating graphene oxide(GO),acetic acid(HAc)and nickel foam to prepare hydrogenated graphene(HG).There are two primary aims of this study:one is to ascertain the structure of the as-prepared HG,and the other one is to investigate the ferromagnetism of the HG.Under hydrothermal conditions,GO was reduced and hydrogenated by HAc,while the nickel foam served as a catalyst.This work provides a novel and facile route for the synthesis of hydrogenated graphene,which may lead to the application of hydrogenated graphene in spin electronic devices.

关键词： Graphene Hydrogenation Hydrothermal method Ferromagnetism carbon materials

Synergistic effect of T80/B30 vesicles and T80/PN320 mixed micelles with Se/C on nasal mucosal immunity

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Chinese Chemical Letters 2021年第9期32卷 2761-2764页

作者： Hongen Cao Ruonan Ma Sainan Chu Juqun Xi Lei Yu Rong Guo School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China Medical College Yangzhou UniversityYangzhou 225001China

Selenium doped carbon(Se/C),an easily fabricated material,was found to be bio-active and it can serve as an adjuvant to enhance the immune effect of Tween 80/Brij 30(T80/B30)vesicles and Tween 80/polymer cationic surfactant PN320(T80/PN320)mixed micelles.The synergistic effect of the combination of T80/B30 vesicles and T80/PN320 mixed micelles with Se/C on nasal mucosal immunity was studied in this work,which might provide theoretical basis for developing the related new adjuvant for nasal immunization of recombinant protein,peptide and split protein vaccine.Since both selenium and carbon were bio-compatible elements,Se/C might be safe for practical applications,and this was also reflected by the low hemolytic activity of the materials.This work not only reports an efficient protocol for adjuvant development,but also significantly expands the application scope of selenium chemistry.

关键词： carbon materials Biomaterials Selenium Bioactivity Immunity Nasal vaccination

Sodiophilicity/potassiophilicity chemistry in sodium/potassium metal anodes

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Journal of Energy Chemistry 2020年第12期29卷 1-6页

作者： Xiang Chen Yun-Ke Bai Xin Shen Hong-Jie Peng Qiang Zhang Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Department of Chemical Engineering Stanford UniversityStanfordCA 94305USA

Heteroatom-doped carbon materials have been widely used as sodium(Na) and potassium(K) metal anode frameworks to achieve uniform Na and K depositions. If the origin of the Sodiophilicity and potassiophilicity of doping sites in heteroatom-doped carbon host are clearly understood, the nucleation and growth behavior of Na and K can be precisely regulated in working batteries. Herein the Sodiophilicity and potassiophilicity chemistries of carbon materials are probed through first-principles calculations. The local dipole of doping functional groups and charge transfer during Na/K deposition are regarded as key principles to reveal the sodiophilic and potassiophilic nature of doping sites. Especially, O–B, O–S, and O–P co-doping strategy are predicted to be effective methods to improve the Sodiophilicity and potassiophilicity of carbon hosts and thus render safe and dendrite-free Na and K metal anodes. This work affords a deep and insightful understanding of Sodiophilicity and potassiophilicity chemistry of Na and K anodes and establishes general principles of designing highly sodiophilic and potassiophilic carbon frameworks.

关键词： Sodium and potassium metal anodes Sodiophilicity and potassiophilicity carbon materials First-principles calculations Dendrite-free electrode

Heteroatom Doped Multi-Layered Graphene Material for Hydrogen Storage Application

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Graphene 2016年第2期5卷 39-50页

作者： Arjunan Ariharan Balasubramanian Viswanathan Vaiyapuri Nandhakumar National Centre for Catalysis Research Indian Institute of Technology Madras Chennai India PG & Research Department of Chemistry AVVM Sri Pushpam College Poondi Bharathidasan University Trichy India

A variety of distinctive techniques have been developed to produce graphene sheets and their functionalized subsidiaries or composites. The production of graphene sheets by oxidative exfoliation of graphite can be a suitable route for the preparation of high volumes of graphene derivatives. P-substituted graphene material is developed for its application in hydrogen sorption in room temperature. Phosphorous doped graphene material with multi-layers of graphene shows a nearly ~2.2 wt% hydrogen sorption capacity at 298 K and 100 bar. This value is higher than that for reduced graphene oxide (RGO without phosphorous).

关键词： Hydrogen Storage carbon materials Graphene materials Heteroatom Doped Graphene Phosphorous Doped Graphene Hydrogen Storage Capacity

Single-atom catalyst of transition metals(Mo,Nb,W,Ta/Co) composite with nitrogen-doped carbon for dye-sensitized solar cells

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Single-atom catalyst of transition metals(Mo,Nb,W,Ta/Co) com...

carbon and rich carbon-based Low Dimension Nanostructures

第五届新型太阳能电池学术研讨会

作者：张婷婷云斯宁西安建筑科技大学材料与矿资学院功能材料研究所

Typical dye-sensitized solar cells(DSSCs) are composed of a fluorine-doped tin oxide(FTO) glass,a dyed coated TiO anode,an electrolyte,and a counter electrode(CE).The CE in DSSC systems played the roles of reducing Iand collecting electrons.Preferred CE material platinum(Pt) electrode is expensive and can be decomposed to PtI or H Pt I by I/Iredox couple in the electrolyte,thus limited its large-scale commercial application in DSSCs due to the critical issues on the cell performance and long-term stability.Therefore,it is urgent to explore Pt-free CEs to facilitate the industrial development of DSSCs.Low-cost carbon materials and transition metals compound are widely utilized as CEs in DSSCs.Composite transition metals with carbon materials(e.g.,nitrogen-doped carbon) is expected to have both the advantage of the two materials.Single-atom dispersed metal and nitrogen bi-modified carbon material(Co-N-C) catalyst is already proved to be a promising candidate for substituting Pt in electrocatalysis.The present work is to synthesis single-atom dispersed transition metals(e.g.,Mo,Nb,W,Ta/Co) into nitrogen-doped carbon to instead of costly Pt electrode.

关键词： dye-sensitized solar cells transition metal single-atom counter electrode carbon materials

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Carbon and rich carbon-based Low Dimension Nanostructures