Arrayed Cobalt Phosphide Electrocatalyst Achieves Low Energy Consumption and Persistent H(2)Liberation from Anodic Chemical Conversion
文献类型：期刊论文
| 作者 | Zhang, Kai ; Zhang, Gong; Ji, Qinghua; Qu, Jiuhui; Liu, Huijuan
|
| 刊名 | NANO-MICRO LETTERS
 |
| 出版日期 | 2020-07-22 |
| 卷号 | 12期号:1页码:1-14 |
| 关键词 | Electrocatalysis Cobalt phosphide Hydrogen purification Ammonia oxidation reaction Membrane-free architecture |
| ISSN号 | 2311-6706 |
| 英文摘要 | Electrochemical reduction of water to hydrogen (H-2) offers a promising strategy for production of clean energy, but the design and optimization of electrochemical apparatus present challenges in terms of H(2)recovery and energy consumption. Using cobalt phosphide nanoarrays (Co2P/CoP NAs) as a charge mediator, we effectively separated the H(2)and O(2)evolution of alkaline water electrolysis in time, thereby achieving a membrane-free pathway for H(2)purification. The hierarchical array structure and synergistic optimization of the electronic configuration of metallic Co2P and metalloid CoP make the Co2P/CoP NAs high-efficiency bifunctional electrocatalysts for both charge storage and hydrogen evolution. Theoretical investigations revealed that the introduction of Co2P into CoP leads to a moderate hydrogen adsorption free energy and low water dissociation barrier, which are beneficial for boosting HER activity. Meanwhile, Co2P/CoP NAs with high capacitance could maintain a cathodic H(2)evolution time of 1500 s at 10 mA cm(-2)driven by a low average voltage of 1.38 V. Alternatively, the energy stored in the mediator could be exhausted via coupling with the anodic oxidation of ammonia, whereby only 0.21 V was required to hold the current for 1188 s. This membrane-free architecture demonstrates the potential for developing hydrogen purification technology at low cost. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/44901]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhang, Kai,Zhang, Gong,Ji, Qinghua,et al. Arrayed Cobalt Phosphide Electrocatalyst Achieves Low Energy Consumption and Persistent H(2)Liberation from Anodic Chemical Conversion[J]. NANO-MICRO LETTERS,2020,12(1):1-14. |
| APA | Zhang, Kai,Zhang, Gong,Ji, Qinghua,Qu, Jiuhui,&Liu, Huijuan.(2020).Arrayed Cobalt Phosphide Electrocatalyst Achieves Low Energy Consumption and Persistent H(2)Liberation from Anodic Chemical Conversion.NANO-MICRO LETTERS,12(1),1-14. |
| MLA | Zhang, Kai,et al."Arrayed Cobalt Phosphide Electrocatalyst Achieves Low Energy Consumption and Persistent H(2)Liberation from Anodic Chemical Conversion".NANO-MICRO LETTERS 12.1(2020):1-14. |
入库方式： OAI收割
来源：生态环境研究中心
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