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hydrogen pumping
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     Hydrogen in the Future
     氢能在可持续发展战略中的应用前景展望
     . H-O hydrogen bonding.
     X -射线单晶结构分析表明 ,该化合物的羧基O和配位水分子O通过O…H—O氢键在链方向上和链之间形成网状结构 .
短句来源
     MEASUREMENT OF THE NUMBER DENSITY OF HYDROGEN ATOMS WITH THE PUMPING MAGNETIC RESONANCE CURVE
     利用光泵磁共振曲线测量氢原子密度(英文)
短句来源
     The pumping speeds of 24000 L/s for nitrogen and 26000 L/s for hydrogen have been obtained.
     泵对氮和氢的抽速分别为24000和26000 L/s。
短句来源
     Intelligent Pumping System
     智能化抽油系统
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  hydrogen pumping
It was found that this phenomenon plays a significant role in a normal fuel cell operation (fuel mixture - air) but not in a hydrogen pumping operation (fuel mixture - H2).
      
The electrochemical hydrogen pumping rates coincided with the theoretical ones calculated from Faraday's law, confirming that La0.9Sr0.1Ga0.9Zn0.1O3-α is a proton conductor under hydrogen atmosphere.
      
Protonic conduction in these oxides under hydrogen containing atmospheres was confirmed by emf measurements of hydrogen concentration cells and by electrochemical hydrogen pumping using these oxides as a diaphragm.
      
The induced change in the reaction rate at anodic polarization of a Pt electrode-catalyst was over two orders of magnitude higher than the rate of hydrogen pumping from the reaction zone through the electrolyte.
      
The non-Faradaic effect of electrochemical hydrogen pumping on the rate of methane oxidation has been demonstrated.
      
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Ba_(1.03)Ce_(0.8)Dy_(0.2)O_(3-α) solid electrolyte with nonstoichio metric composition has been synthesized for the first time by high temperature solid-state reaction.The crystal structure was determined by X-ray diffraction.The sa mple was a single-phase structure of perovsk ite-type orthorhombic system.Its c onduction properties of proton and o xide-ion were investigated in the temperatur e range of 600~1000℃by means of gas concentration cells and hydrogen pumping(electrochemical hydrogen permeati...

Ba_(1.03)Ce_(0.8)Dy_(0.2)O_(3-α) solid electrolyte with nonstoichio metric composition has been synthesized for the first time by high temperature solid-state reaction.The crystal structure was determined by X-ray diffraction.The sa mple was a single-phase structure of perovsk ite-type orthorhombic system.Its c onduction properties of proton and o xide-ion were investigated in the temperatur e range of 600~1000℃by means of gas concentration cells and hydrogen pumping(electrochemical hydrogen permeati on),respectively,and compared them wi th those of the stoichiometric composition of BaCe 0.8 Dy 0.2 O 3-α solid electrolyte.The experimenta l results indicate that Ba 1.03 Ce 0.8 Dy 0.2 O 3-α is superior to BaCe 0.8 Dy 0.2 O 3-α in the protonic conduction.Ba 1.03 Ce 0.8 Dy 0.2 O 3-α is almost a pure proton conductor(proton transport number is about equ al 1)over the temperature range of 600~1000℃,whereas BaCe 0.8 Dy 0.2 O 3-α is a pure proton conductor at 600~800℃,however,it becomes a mixed conductor of proton and electron above800℃under hydrogen atmosphere.Both the samples are all a mixed conducto r of oxide-ion and electron hole with an almost same oxide-ionic transport number under oxygen atmosphere.

用高温固相反应法首次合成了非化学计量组成的Ba1.03Ce0.8Dy0.2O3-α固体电解质样品,对其进行了X-射线衍射晶体结构测定,该样品为钙钛矿型斜方晶单相结构。分别用气体浓差电池方法和氢泵(氢的电化学透过)方法研究了它在600~1000℃下的质子和氧离子导电特性,并与化学计量组成的BaCe0.8Dy0.2O3-α固体电解质样品进行了比较。实验结果表明,Ba1.03Ce0.8Dy0.2O3-α的质子导电性优于BaCe0.8Dy0.2O3-α。Ba1.03Ce0.8Dy0.2O3-α在600~1000℃下氢气氛中的质子迁移数约为1,几乎是一个纯质子导体,而BaCe0.8Dy0.2O3-α在氢气氛中600~800℃下是一个纯质子导体,在高于800℃时是一个质子与电子的混合导体。这两个样品在氧气氛中均是氧离子与电子空穴的混合导体,具有几乎相同的氧离子迁移数。

Ba 0.98Ce 0.8Eu 0.2O 3-α solid electrolyte with nonstoichiometric composition has been synthesized by high temperature solid-state reaction. The crystal structure was determined by X-ray diffractometry. Its proton and oxide-ion conduction were investigated in the temperature range of 600~1 000 ℃ by means of gas concentration cells and electrochemical hydrogen permeation(hydrogen pumping), respectively. Its fuel cell performances were investigated and compared with those of BaCe 0.8Eu ...

Ba 0.98Ce 0.8Eu 0.2O 3-α solid electrolyte with nonstoichiometric composition has been synthesized by high temperature solid-state reaction. The crystal structure was determined by X-ray diffractometry. Its proton and oxide-ion conduction were investigated in the temperature range of 600~1 000 ℃ by means of gas concentration cells and electrochemical hydrogen permeation(hydrogen pumping), respectively. Its fuel cell performances were investigated and compared with those of BaCe 0.8Eu 0.2O 3-α solid electrolyte with stoichiometric composition. The experimental results indicate that the sample was a single-phase structure of perovskite-type orthorhombic system. They both have good proton conductivity, and Ba 0.98Ce 0.8Eu 0.2O 3-α has higher proton transport numbers in the temperature range of 600~1 000 ℃ under hydrogen atmosphere. Both of the samples are a mixed conductor of oxide-ion and electron hole with an almost the same oxide-ion transport number under oxygen atmosphere; Ba 0.98Ce 0.8Eu 0.2O 3-α has higher mixed ionic transport numbers under fuel cell condition.

用高温固相反应法合成了非化学计量组成的Ba0 .98Ce0 .8Eu0 .2 O3 -α固体电解质。用粉末XRD技术鉴定了其晶体结构 ;用气体浓差电池和氢的电化学透过 (氢泵 )法研究了在 6 0 0~ 10 0 0℃下的质子和氧离子导电特性 ;研究了样品的H2 空气燃料电池性能 ,并与化学计量组成的BaCe0 .8Eu0 .2 O3 -α固体电解质进行了比较。实验结果表明 ,这 2个样品均为钙钛矿型斜方晶单相结构 ;在H2 气气氛和 6 0 0~ 10 0 0℃温度下 ,皆为良好的质子导体 ,且Ba0 .98Ce0 .8Eu0 .2 O3 -α具有较高的质子迁移数 ;在O2 气气氛中 ,这 2个样品均是氧离子与电子空穴的混合导体 ,具有几乎相同的氧离子迁移数 ;在燃料电池条件下 ,Ba0 .98Ce0 .8Eu0 .2 O3 -α具有较高的混合离子 (质子 +氧离子 )迁移数。

 
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