利用偏钨酸铵前驱体静电纺丝-焙烧法设计制备了具有一维多孔纳米纤维形貌的非贵金属WO₃氢氧化催化剂,考察了焙烧温度对催化剂形貌和电化学性能的影响。一维多孔WO₃纤维催化剂显示出较高的氢氧化活性和电化学活性面积,其电化学活性面积达到商业化Pt/C催化剂的77.3%。使用非贵金属WO₃催化剂的电化学氢泵表现出较好的氢气分离性能,在模拟天然气制氢的H₂/CO₂混气中氢体积分数为75%、混气流量为20 sccm时,与Pt/C催化剂电化学氢泵的电流-电压曲线几乎重合。结果表明,非贵金属WO₃氢氧化催化剂用于电驱动氢分离具有可行性,极大地拓展了电化学氢泵在氢分离领域的规模化应用。

WO₃,a non-noble metal catalyst with one-dimensional porous nanofiber morphology,is designed and prepared from ammonium metatungstate precursor through electrospinning-calcination method,and proposed for the separation of hydrogen-containing gases in electrochemical hydrogen pump.The effect of calcination temperature on the morphology and electrochemical performance of the catalyst is investigated.This one-dimensional porous WO₃ nanofiber catalyst shows a high hydrogen oxidation activity,and its electrochemical active area is equivalent to about 77.3% of that of commercial Pt/C catalyst.The electrochemical hydrogen pump with WO₃ catalyst shows a good hydrogen separation performance,and its current-voltage behavior is comparable to that of the hydrogen pump with Pt/C catalyst when the hydrogen content of H₂/CO₂ is 75 vol.% and the gas flow rate is 20 sccm.It is indicated that it is feasible to use WO₃ hydrogen oxidation catalyst for electrically driven hydrogen separation,which expands greatly the large-scale application of electrochemical hydrogen pump in the field of hydrogen separation.

潘东伟(1995-),男,硕士研究生,研究方向为化学工程,19pandongwei@mail.dlut.edu.cn