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| 1 | High performance octahedral PtNi/C catalysts investigated from rotating disk electrode to membrane electrode assembly显示文摘Octahedral PtNi/C catalysts have demonstrated superior catalytic performance in oxyge n reduction reacti on (ORR) over commercial Pt/C with rotating disk electrode (RDE). However, it is not trivial to translate such promising results to real-world membrane-electrode assembly (MEA). In this work, we have synthesized octahedral PtNi/C catalysts using poly(diallyldimethylammonium chloride)(PDDA) as a capping age nt and in vestigated their performance from RDE to MEA. In RDE, mass activity and specific activity of the optimized octahedral PtNi/C catalyst for oxygen reduction reaction (ORR) are nearly 19 and 28 times high of the state-of-the-art commercial Pt/C, respectively. At MEA level, the octahedral PtNi/C catalyst exhibits excelle nt power generation performa nee and durability paired with commercial Pt/C ano de. Its cell voltage at 1,000mA·cm^-2 reaches 0.712 V, and maximum power density is 881.6 mW·cm^-2 and its performance attenuation is also less, around 11.8% and 7% under galvanostatic condition of 1,000 mA·cm^-2 for 100 h. Such results are investiaged by thermodynamic analysis and fundametal performance modeling, which indicate the single cell performance can be further improved by reducing the size of PtNi/C catalyst agglomerates. Such encouraging results have demonstrated the feasibility to convey the superior performance of octahedral PtNi/C from RDE to MEA. | Bing Li Jue Wang Xin Gao Congwei Qin Daijun Yang Hong Lv Qiangfeng Xiao Cunman Zhang | 2019 | Nano Research2019，12，2： | 3 |
| 2 | Influence of influent on anaerobic ammonium oxidation in an Expanded Granular Sludge Bed-Biological Aerated Filter integrated system显示文摘Shortcut nitrification-denitrification,anaerobic ammonium oxidation(ANAMMOX),and methanogenesis have been successfully coupled in an Expanded Granular Sludge Bed-Biological Aerated Filter(EGSB-BAF)integrated system.As fed different synthetic wastewater with chemical oxygen demand(COD)of 300-1200 mg·L^(-1)and NH_(4)^(+)-N of 30-120 mg·L^(-1)at the outer recycle ratio of 200%,the influence of influent on ANAMMOX in the integrated system was investigated in this paper.The experimental results showed that higher COD concentration caused an increase in denitrification and methanogenesis but a decrease in ANAMMOX;however,when an influent with the low concentration of COD was used,the opposite changes could be observed.Higher influent NH_(4)^(+)-N concentration favored ANAMMOX when the COD concentration of influent was fixed.Therefore,low COD=NH_(4)^(+)-N ratio would decrease competition for nitrite between ANAMMOX and denitrification,which was favorable for reducing the negative effect of organic COD on ANAMMOX.The good performance of the integrated system indicated that the bacterial community of denitrification,ANAMMOX,and methanogenesis could be dynamically maintained in the sludge of EGSB reactor for a certain range of influent. | Daijun ZHANG Cui BAI Ting TANG Qing YANG | 2011 | Frontiers of Environmental Science & Engineering2011，5，2： | 2 |
| 3 | Surface Modification of Bituminous Coal and Its Effects on Methane Adsorption显示文摘这份报纸在甲烷吸附在煤表面上学习了包含 O 组的角色。煤与 H2SO4 被修改,(NH4 ) 2S2O8 或 H2SO4/(NH4 ) 2S2O8 ) ,分别地介绍包含 O 功能的组,并且由贴近的分析,最终的分析, Boehm 滴定, X 光检查光电子光谱学(XPS ) 和氮吸附描绘了。最终的分析, Boehm 滴定和 XPS 的结果显示以两个有增加氧的内容和包含 O 的数量在修改的煤表面上组织,特别为 carboxyl。氮吸附证明修改的煤比 0-XQ 的拥有了更高的表面区域和毛孔体积。甲烷吸附数据被容量的方法在压力在 298 K 测量直到 4.0 MPa 并且由兰米尔模型适合很好。试验性的结果暗示包含 O 组和毛孔结构影响了甲烷吸附。吸附能力作为增加包含 O 组的数量减少了。 | Yanyan Feng Wen Yang Daijun Liu Wei Chu | 2013 | Chinese Journal of Chemistry2013，31，8： | 2 |
| 4 | The Controllable Design of Catalyst Inks to Enhance PEMFC Performance:A Review显示文摘Typical catalyst inks in proton exchange membrane fuel cells(PEMFCs)are composed of a catalyst,its support,an ionomer and a solvent and are used with solution processing approaches to manufacture conventional catalyst layers(CLs).Because of this,catalyst ink formulation and deposition processes are closely related to CL structure and performance.However,catalyst inks with ideal rheology and optimized electrochemical performances remain lacking in the large-scale application of PEMFCs.To address this,this review will summarize current progress in the formulation,characterization,modeling and deposition of catalyst inks.In addition,this review will highlight recent advancements in catalyst ink materials and discuss corresponding complex interactions.This review will also present various catalyst ink dispersion methods with insights into their stability and introduce the application of small-angle scattering and cryogenic transmission electron microscopy(cryo-TEM)technologies in the characterization of catalyst ink microstructures.Finally,recent studies in the kinetic modeling and deposition of catalyst inks will be analyzed. | Yuqing Guo Fengwen Pan Wenmiao Chen Zhiqiang Ding Daijun Yang Bing Li Pingwen Ming Cunman Zhang | 2021 | Electrochemical Energy Reviews2021，4，1： | 2 |
| 5 | A single-base deletion in soybean flavonoid 3'-hydroxylase gene is associated with gray pubescence color显示文摘 | Kyoko Toda Daijun Yang Naoki Yamanaka | 2002 | Plant Mol Biol2002，50，2： | 1 |
| 6 | Kinetics and electrocatalytic activity of IrCo/C catalysts for oxygen reduction reaction in PEMFC 显示文摘 | DAIJUN YANG BING LI HAO ZHANG | 2012 | International Journal of Hydrogen Energy2012，37，3： | 1 |
| 7 | A review on water balance in the membrane electrode assembly of proton exchange membrane fuel cells显示文摘 | Wei Dai Haijiang Wang Xiao-Zi Yuan Jonathan J. Martin Daijun Yang Jinli Qiao Jianxin Ma | 2009 | International Journal of Hydrogen Energy2009，，23： | 1 |
| 8 | Evaluation of activated carbon adsorbent for fuel cell cathode air flit ration显示文摘 | MA Xiaowei YANG Daijun ZHOU Wei | 2008 | J Power Sources2008，175，1： | 1 |
| 9 | A single-base deletion in soybean flavonoid 3′-hydroxylase gene is associated with gray pubescence color显示文摘 | Kyoko Toda Daijun Yang Naoki Yamanaka Satoshi Watanabe Kyuya Harada Ryoji Takahashi | 2002 | Plant Molecular Biology2002，，2： | 1 |
| 10 | The effect of nitrogen oxides in air on the performance of proton exchange membrane fuel cell显示文摘 | Yang Daijun Ma Jianxin Xu Lin | 2006 | ElectrochimicaActa2006，51，19： | 1 |
| 11 | Effect of driving cy- cle on the performance of PEM fuel cell and mierostructure of membrane electrode assembly显示文摘 | Li Bing Lin Rui Yang Daijun Ma Jianxin | 2010 | International Journal of Hydro- gen Energy 352010，，： | 1 |
| 12 | Accelerated Test of Silicone Rubbers Exposing to PEMFC environment显示文摘The durability of sealing material is one of the major challenges to the overall lifetime of proton exchange membrane fuel cell(PEMFC).In order to study the failure mode and aging mechanism of fuel cell seals,this paper focuses on the most widely used commercial silicone rubber,and an ex-situ accelerated aging method was employed by simulating the circumstance of PEMFC,including higher temperature and clamping force,lower p H value and F-with higher concentration.The main factors that affect the performance of the seal were obtained through the test of their morphologies and mechanical properties.The failure mode of the aging mechanism of the rubbers were analyzed through scanning electron microscopy(SEM),energy dispersive spectrometer(EDS),attenuated-total-reflection infrared spectroscopy(ATR-IR),mass loss,compression set(CS),etc.It was found that temperature played an important role in the deterioration of seal performance,and the change of the parameters of the compression set with time conformed the dynamic empirical formula,which provides the experimental basis for the lifetime prediction of the seals. | Daijun Yang Jingwen Ma Qing Zhang Bing Li Pingwen Ming Cunman Zhang | 2020 | Progress in Natural Science:Materials International2020，30，6： | 0 |
| 13 | Pt‑Based Intermetallic Compound Catalysts for the Oxygen Reduction Reaction:Structural Control at the Atomic Scale to Achieve a Win–Win Situation Between Catalytic Activity and Stability显示文摘The development of ordered Pt-based intermetallic compounds is an effective way to optimize the electronic characteristics of Pt and its disordered alloys,inhibit the loss of transition metal elements,and prepare fuel cell catalysts with high activity and long-term durability for the oxygen reduction reaction(ORR).This paper reviews the structure–activity characteristics,research advances,problems,and improvements in Pt-based intermetallic compound fuel cell catalysts for the ORR.First,the structural characteristics and performance advantages of Pt-based intermetallic compounds are analyzed and explained.Second,starting with 3d transition metals such as Fe,Co,and Ni,whose research achievements are common,the preparation process and properties of Pt-based intermetallic compound catalysts for the ORR are introduced in detail according to element types.Third,in view of preparation problems,improvements in the preparation processes of Pt-based intermetallic compounds are also summarized in regard to four aspects:coating to control the crystal size,doping to promote ordering transformation,constructing a“Pt skin”to improve performance,and anchoring and confinement to enhance the interaction between the crystal and support.Finally,by analyzing the research status of Pt-based intermetallic compound catalysts for the ORR,prospective research directions are suggested. | Jue Wang Fengwen Pan Wenmiao Chen Bing Li Daijun Yang Pingwen Ming Xuezhe Wei Cunman Zhang | 2023 | Electrochemical Energy Reviews2023，6，1： | 0 |
| 14 | Modifying Carbon Supports of Catalyst for the Oxygen Reduction Reaction in Vehicle PEMFCs显示文摘For current carbon-supported Pt catalysts in vehicle proton exchange membrane fuel cells(PEMFCs),the insufficient stability and durability of carbon supports are severe limitations under operating conditions.This paper adopts the accelerated stress test(AST)method to study the carbon corrosion of catalysts,which is significant to efficiently select the catalysts supports in fuel cells.Graphitized carbon blacks with various surface properties are heated under different conditions,followed by evaluation of their antioxidation capacity with the AST.It is shown that optimally graphitized carbon blacks demonstrate superior stability,retaining a constant quinone/hydroquinone(QH)transition peak potential for over 70,000 AST cycles.A Pt catalyst supported on the selected graphitized carbon exhibits excellent durability at both the rotating disk electrode(RDE)and membrane electrode assembly(MEA)levels.The final specific mass activity(MA)of the optimum catalyst is 47.87 mA/mgPt,which is 2.06 times that of commercial Pt/C(23.31 mA/mgPt)in the RDE tests.The final maximum power density of the optimum catalyst is 525.68 mW/cm^(2),which is 305.52 mW/cm^(2)higher than that of commercial Pt/C after undergoing the AST during the MEA measurements.These results prove that the rational surface features of carbon supports play a vital role in improving the overall fuel cell performance by realizing uniform dispersion of Pt nanoparticles,resisting corrosion,and reinforcing metal-support interactions. | Qiong Xue Daijun Yang Lei Jiang Bing Li Pingwen Ming | 2021 | Automotive Innovation2021，4，2： | 0 |
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