Bimetallic sulfide interfaces: Promoting destabilization of water molecules for overall water splitting
Bimetallic sulfide interfaces: Promoting destabilization of water molecules for overall water splitting
复制标题
双金属硫化物界面：促进水分子的不稳定以实现整体水分解
DOI：
10.1016/j.jpowsour.2020.229408
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发表时间：
2021
影响因子：
9.2
通讯作者：
Liu Zhao-Qing
中科院分区：
文献类型：
--
作者：
Xiao Kang;Wei Jin-Xin;Han Wen-Kai;Liu Zhao-Qing
电化学水裂解制氢技术是一个研究热点。然而，很难开发出在相同反应介质中同时具有析氧和析氢的有效活性的催化剂。在此，我们开发了一种界面硫化镍（Ni 3S 2/FeS），以有效地运行在碱性介质中的析氧反应和析氢反应。计算和实验结果表明，Ni 3S 2/FeS纳米界面上的强电子相互作用，优化了H和OH基团的吸附能，从而改善了水电解性能。所得Ni 3S 2/FeS表现出上级的电催化性能，在30 mA cm− 2下，对OER和HER的过电位分别为295和190 mV。基于Ni 3S 2/FeS电极的碱性电解槽仅需1.61 V即可达到10 mA cm−2的电流密度。
Electrochemical water splitting has drawn tremendous research interest for scalable generation of clean hydrogen fuel from water. However, it is difficult to develop a catalyst possessing efficient activity of both oxygen and hydrogen evolution in the same reaction media. Herein, we developed an interfacial bimetallic sulfide (Ni3S2/FeS) to operate efficiently in alkaline media for both oxygen evolution reaction and hydrogen evolution reaction. Calculation and experiment results revealed a strong electron interaction on the Ni3S2/FeS nanointerfaces, optimizing the adsorption energies for H and OH groups and thus improving the water electrolysis performance. The obtained Ni3S2/FeS exhibited superior electrocatalytic performances with overpotentials of 295 and 190 mV at 30 mA cm−2toward OER and HER, respectively. An alkaline electrolyzer based on Ni3S2/FeS electrodes only 1.61 V to reach the current density of 10 mA cm−2.