Appl. Catal. B Environ. Energy
Pub Date : 2020-08-07
DOI : 10.1016/j.apcatb.2020.119396
Ding Chen , Ruihu Lu , Zonghua Pu , Jiawei Zhu , Hai-Wen Li , Fang Liu , Song Hu , Xu Luo , Jinsong Wu , Yan Zhao , Shichun Mu
裂解水制氢技术的辉煌前景使得开发高效稳定的氢/氧放出反应（HER / OER）双功能催化剂成为当务之急。在本文中，受密度函数理论（DFT）计算结果的启发，Ru掺杂物对OER和HER过程均具有爬升作用，我们在镍泡沫上构建了Ru掺杂的三维花状双金属磷化物（Ru-NiCoP / NF ）衍生自Co叶状沸石咪唑酸酯骨架（Co ZIF-L），可在1 M KOH溶液中有效驱动OER（216mV @ 20 mA cm -2）和HER（44mV @ 10 mA cm -2）。通过使用Ru-NiCoP / NF作为阳极和阴极组装的整个水分解装置显示1.515 V的超低电池电压以获得10 mA cm -2。有趣的是，对于整个水分解，法拉第收率几乎达到100％。这项工作是对探索新型过渡金属磷化物的重要补充，该新型过渡金属磷化物在通过电化学水电解制氢中具有出色的性能。
Ru-doped 3D flower-like bimetallic phosphide with a climbing effect on overall water splitting
The resplendent prospect of water splitting hydrogen production technology makes the development of efficient and stable hydrogen/oxygen evolution reactions (HER/OER) bifunctional catalysts become urgent. Herein, inspired by the density function theory (DFT) calculation result that Ru-dopants have a climbing effect on both OER and HER processes, we construct a Ru doped three-dimensional flower-like bimetallic phosphide on nickel foam (Ru-NiCoP/NF) derived from Co leaf-like zeolitic imidazolate framework (Co ZIF-L), effectively driving both OER (216mV@20 mA cm−2) and HER (44mV@10 mA cm−2) in 1 M KOH solutions. The overall water splitting device assembled by using Ru-NiCoP/NF as both anode and cathode shows an ultralow cell voltage of 1.515 V to obtain 10 mA cm−2. Interestingly, almost 100 % Faradic yield is achieved for the overall water splitting. This work represents a significant addition to exploring a new class of transition metal phosphides with outstanding performance in producing hydrogen via electrochemical water electrolysis.
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