Accelerating water dissociation in bipolar membranes and for electrocatalysis
Accelerating water dissociation in bipolar membranes and for electrocatalysis
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DOI：
10.1126/science.aaz1487
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发表时间：
2020-08-28
期刊：
影响因子：
56.9
通讯作者：
Boettcher, Shannon W.
中科院分区：
文献类型：
--
作者：
Oener, Sebastian Z.;Foster, Marc J.;Boettcher, Shannon W.
催化水解离（WD）成质子和氢氧根离子对于制造可将不同pH环境耦合到单个电化学装置中的双极膜（BPM）和加速在中性至碱性介质中消耗质子的电催化反应都是重要的。我们设计了一个BPM电解槽来定量测量WD动力学，并表明，对于金属纳米颗粒，WD活性与碱性析氢反应活性相关。通过将在酸性质子交换层附近有效的金属氧化物WD催化剂与在碱性氢氧化物交换层附近有效的金属氧化物WD催化剂相结合，我们证明了BPM驱动WD的过电位为
Catalyzing water dissociation (WD) into protons and hydroxide ions is important both for fabricating bipolar membranes (BPMs) that can couple different pH environments into a single electrochemical device and for accelerating electrocatalytic reactions that consume protons in neutral to alkaline media. We designed a BPM electrolyzer to quantitatively measure WD kinetics and show that, for metal nanoparticles, WD activity correlates with alkaline hydrogen evolution reaction activity. By combining metal -oxide WD catalysts that are efficient near the acidic proton -exchange layer with those efficient near the alkaline hydroxide-exchange layer, we demonstrate a BPM driving WD with overpotentials of