CAJ | 학술논문

在碳纤维上采用三脉冲电沉积的方法制备出钯银合金纳米粒子链.把表面覆盖有Pd-Ag合金纳米粒子链的碳纤维组装成氢气传感器.采用扫描电子显微镜(SEM)和X射线能谱(EDX)表征了合金纳米粒子链的形貌和成分,应用CHI660B电化学工作站测试其氢传感性能.结果表明,在钯、银离子摩尔比为15:1的电解液中,在-1.0--1.5 V下,成核5-40 ms;在-0.25--0.35 V,生长200-300 s的条件下,即可获得银的质量分数为16.0%-25.0%的钯银合金纳米粒子链阵列.在室温下,传感器对在0.30%-5.00%(φ,体积分数,下同)范围内的氢气有响应,最快响应时间约为300 s,灵敏度最高可达31.0%;氢在0.30%-1.20%的范围内响应电流与氢气浓度成线性关系,超过4.00%时响应电流不再随浓度的增加而变化;在低于3.50%的浓度下氢传感器的重现性良好.
재탄섬유상채용삼맥충전침적적방법제비출파은합금납미입자련.파표면복개유Pd-Ag합금납미입자련적탄섬유조장성경기전감기.채용소묘전자현미경(SEM)화X사선능보(EDX)표정료합금납미입자련적형모화성분,응용CHI660B전화학공작참측시기경전감성능.결과표명,재파、은리자마이비위15:1적전해액중,재-1.0--1.5 V하,성핵5-40 ms;재-0.25--0.35 V,생장200-300 s적조건하,즉가획득은적질량분수위16.0%-25.0%적파은합금납미입자련진렬.재실온하,전감기대재0.30%-5.00%(φ,체적분수,하동)범위내적경기유향응,최쾌향응시간약위300 s,령민도최고가체31.0%;경재0.30%-1.20%적범위내향응전류여경기농도성선성관계,초과4.00%시향응전류불재수농도적증가이변화;재저우3.50%적농도하경전감기적중현성량호.
Pd-Ag allov nanopaaicle chains were fabricated on carbon fibers using three-pulse electrodeposition method.Pd-Ag alloy nanoparticle chains on carbon fiber surfaces can be used as hydrogen sensors.Scanning electron microscopy(SEM)and X-ray spectroscopy(EDX)were used to characterize the morphology and composition of the alloy nanoparticle chains.A CHI660B electrochemical workstation wag used to evaluate the hydrogen sensing ability.Results show that Pd-Ag alloy nanoparficle chain arrays with a silver content of 16.0%-25.0%(w)were obtained in the electrolyte with an ion concentration ratio(molar ratio)of palladium to silver of 15:1.At-1.0--1.5 V nucleation took place within 5-40 ms and at-0.25--0.35 V growth was allowed for 200-300 s.The sensors responded to hydrogen gas at concentrations of 0.30%-5.00%(φ,volume fraction)at room temperature.The fastest response time was about 300 s and 31.0%sensitivity was obtained.The response current was linearly proportional to the hydrogen concentrations from 0.30% to 1.20%(φ).The current signal did not change with the hydrogen concentration larger than 4.00%.These hydrogen sensors show good reproducibility at hydrogen concentrations lower than 3.50%.