Nanocrystalline Fe60Co20Si10B10 as a cathode catalyst for alkaline water electrolysis: Impact of surface activation
Nanocrystalline Fe60Co20Si10B10 as a cathode catalyst for alkaline water electrolysis: Impact of surface activation
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DOI：
10.1016/j.electacta.2019.03.107
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发表时间：
2019-05
影响因子：
6.6
通讯作者：
Martin Ďurovič;Jaromír Hnát;C. I. Bernäcker;T. Rauscher;L. Röntzsch;M. Paidar;K. Bouzek
中科院分区：
文献类型：
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作者：
Martin Ďurovič;Jaromír Hnát;C. I. Bernäcker;T. Rauscher;L. Röntzsch;M. Paidar;K. Bouzek
采用球磨雾化法制备了纳米晶Fe_（60）Co_（20）Si_（10）B_（10），并将其用作碱性水电解的析氢催化剂。研究了该材料的两个面向应用的方面：（i）催化剂的表面活化（循环伏安法和在1 mol dm-3氢氧化钾中的浸出）和（ii）催化剂层的组成（催化剂与聚合物粘合剂的量的比率）。聚苯乙烯-嵌段-聚（乙烯-丁二烯）-嵌段-聚苯乙烯与DABCO功能基团（PSEBS-CM-DABCO）被用作阴离子选择性粘合剂。通过塔菲尔分析和通过记录碱性水电解条件下的负载曲线来评价材料的催化活性。结果表明，两种活化程序使Fe 60 Co 20 Si 10 B 10催化剂的活性与原样材料相比提高了近50%。确定了催化剂与粘结剂的最佳配比为70：30。催化剂在进行的稳定性测试中保持稳定和活性。
Nanocrystalline Fe60Co20Si10B10, prepared by ball milling atomised powder, was studied as a hydrogen evolution reaction catalyst for alkaline water electrolysis. Two application-oriented aspects of this material were studied: (i) Surface activation of the catalyst (cyclic voltammetry and leaching in 1 mol dm−3potassium hydroxide) and (ii) the composition of a catalyst layer (ratio of the amount of catalyst to the polymer binder). Polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene with DABCO functional groups (PSEBS-CM-DABCO) was used as an anion-selective binder. The catalytic activity of the material was evaluated by means of Tafel analysis and by recording load curves under alkaline water electrolysis conditions. The results revealed that both activation procedures increase the activity of the Fe60Co20Si10B10catalyst by almost 50% compared to as-received material. The most suitable ratio of catalyst to binder was determined as 70:30. The catalyst remained stable and active in the stability test performed.