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| 1 | Pt/WO_3/C nanocomposite with parallel WO_3 nanorods as cathode catalyst for proton exchange membrane fuel cells显示文摘Pt/WO3/C nanocomposites with parallel WO3 nanorods were synthesized and applied as the cathode catalyst for proton exchange membrane fuel cells(PEMFCs). Electrochemical results and single cell tests show that an enhanced activity for the oxygen reduction reaction(ORR) is obtained for the Pt/WO3/C catalyst compared with Pt/C. The higher catalytic activity might be ascribed to the improved Pt dispersion with smaller particle sizes. The Pt/WO3/C catalyst also exhibits a good electrochemical stability under potential cycling. Thus, the Pt/WO3/C catalyst can be used as a potential PEMFC cathode catalyst. | Meiling Dou Ming Hou Zhilin Li Feng Wang Dong Liang Zhigang Shao Baolian Yi | 2015 | Journal of Energy Chemistry2015，24，1： | 4 |
| 2 | Microstructure and heat treatment for Ni3Al-based single crystal alloy with different crystal orientations显示文摘Ni3Al-based single crystal alloy IC6SX with different crystal orientations were prepared by seed crystal method.The microstructure and heat treatment of the alloy were investigated.The results showed that the microstructure of the alloy was in dendrite structure,and the crystal orientation had significant effect on the dendrite morphology of this alloy.The precipitated phases of(MoNi)6C and NiMo appeared in the microstructure of the three alloys with different crystal orientations during solidification process.Compared with other two alloys,the volume fractions of precipitated phases of both(MoNi)6C and NiMo was the most in the alloy with[111]orientation and the least in the alloy with[001]orientation.The solidus and liquidus temperatures of the alloy IC6SX tested by differential scanning calorimetry(DSC)were 1356℃and 1387℃,respectively.Meanwhile,the effect of different solution temperatures on the microstructure of the alloy with different orientations was studied.The results showed that the precipitated phases of(MoNi)6C and NiMo were eliminated with the solid solution treatment under the condition of 1300℃/10h.However,the incipient melting of the alloys occurred due to the dissolution of low melting point phases.As the temperature dropped to 1280℃,the area of incipient melting in the alloy with different orientations decreased gradually.However,there was no incipient melting appearing in the three alloys with different orientations when the solution treatment temperature dropped to 1260℃. | Liwu Jiang Xuezheng Dou Meiling Wu Min Cai | 2020 | Progress in Natural Science:Materials International2020，30，4： | 2 |
| 3 | Behavior of a unit proton exchange membrane fuel cell in a stack under fuel starvation显示文摘 | Dong Liang Meiling Dou Ming Hou Qiang Shen Zhigang Shao Baolian Yi | 2011 | Journal of Power Sources2011，，13： | 1 |
| 4 | Behaviors of proton exchange membrane fuel cells under oxidant starvation显示文摘 | Meiling Dou Ming Hou Dong Liang Qiang Shen Huabing Zhang Wangting Lu Zhigang Shao Baolian Yi | 2010 | Journal of Power Sources2010，，5： | 1 |
| 5 | Effect of load-cycling amplitude on performance degradation for proton exchange membrane fuel cell显示文摘Durability is one of the critical issues to restrict the commercialization of proton exchange membrane fuel cells(PEMFCs) for the vehicle application.The practical dynamic operation significantly affects the PEMFCs durability by corroding its key components.In this work,the degradation behavior of a single PEMFC has been investigated under a simulated automotive load-cycling operation,with the aim of revealing the effect of load amplitude(0.8 and 0.2 A/cm2 amplitude for the current density range of0.1-0.9 and 0.1-0.3 A/cm^(2),respectively) on its performance degradation.A more severe degradation on the fuel cell performance is observed under a higher load amplitude of 0.8 A/cm^(2) cycling operation,with$10.5% decrease of cell voltage at a current density of 1.0 A/cm2.The larger loss of fuel cell performance under the higher load amplitude test is mainly due to the frequent fluctuation of a wider potential cycling.Physicochemical characterizations analyses indicate that the Pt nanoparticles in cathodic catalyst layer grow faster with a higher increase extent of particle size under this circumstance because of their repeated oxidation/reduction and subsequent dissolution/agglomeration process,resulting in the degradation of platinum catalyst and thus the cell performance.Additionally,the detected microstructure change of the cathodic catalyst layer also contributes to the performance failure that causes a distinct increase in mass transfer resistance. | Kun Wang Ning Li Yanan Yang Shaojie Ke Zhengping Zhang Meiling Dou Feng Wang | 2021 | Chinese Chemical Letters2021，32，10： | 0 |
| 6 | Effect of hydrogen impurities on hydrogen oxidation activity of Pt/C catalyst in proton exchange membrane fuel cells显示文摘High-purity of hydrogen is vital to the guarantee of end usage in proton exchange membrane fuel cell(PEMFC)electric vehicles(EVs)with superior durability and low expense.However,the currently employed hydrogen,primarily from fossil fuel,still contains some poisoning impurities that significantly affect the durability of PEMFCs.Here,we investigate the poisoning effect of several typical hydrogen impurities(S^(2-),Cl^(-),HCOO^(-)and CO_(3)^(2-))on the hydrogen oxidation reaction(HOR)of the state-of-the-art carbon-supported platinum(Pt/C)catalyst used in the PEMFC anode.Electrochemical results indicate that the electrochemically active surface area of Pt/C is hampered by these hydrogen impurities with reduced effective Pt reactive sites due to the competitive adsorption against hydrogen at Pt sites showing the extent of the poisoning on Pt sites in the order:S^(2-)>Cl^(-)>HCOO^(-)>CO_(3)^(2-).Density functional theory calculations reveal that the adsorption energy of S2-on Pt(111)is greater than that of Cl^(-),HCOO^(-)and CO_(2),and the electronic structure of Pt is found to be changed due to the adsorption of impurities showing the downshift of the d-band centre of Pt that weakens the adsorption of hydrogen on the Pt sites.This work provides valuable guidance for future optimization of hydrogen quality and also emphasizes the importance of anti-poisoning anode catalyst development,especially towards H_(2)S impurities that seriously affect the durability of PEMFCs. | Yufeng Qin Chaoyong Sun Shaojie Ke Rou Wen Yifan Wang Jing Ji Meiling Dou | 2023 | Clean Energy2023，7，1： | 0 |
| 7 | Porous microtubes of nickel-cobalt double oxides as non-enzymatic hydrogen peroxide sensors显示文摘Non-enzymatic electrochemical sensors for the determination of hydrogen peroxide(H_(2)O_(2))have attracted more and more concerns.A series of nickel and cobalt double oxides(Ni_(x)Co_(y)-DO)with the different ratios of Ni/Co have been prepared by a polyol-mediated solvothermal method for H_(2)O_(2)detection.The obtained products exhibit honeycomb-like open porous microtubes constituted with the low-dimensional nanostructured Ni_(x)Co_(y)-DO blocks after the calcination treatment.Compared with nickel oxides,the introduced Co ions in Ni_(x)Co_(y)-DO can induce the production of surficial oxygen vacancies,and further enhance the electrode surface activity.In particular,the NiCo-DO sample(with an atomic ratio of Ni/Co=4:3)shows the richest surficial oxygen vacancies and presents the highest H_(2)O_(2)detection activity among all the as-prepared samples,demonstrating an excellent sensitivity of698.60μAL mmol^(-1)cm^(-2)(0~0.4 mmol/L),low detection limit(0.28μmol/L,S/N=3),as well as long stability,high selectivity and good reproducibility.This work lends a new impetus to the potential application of double metal oxides for the next generation of non-enzymatic sensors. | Qin Li Jin Niu Meiling Dou Zhengping Zhang Feng Wang | 2021 | Chinese Chemical Letters2021，32，3： | 0 |
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