Tan, Yeshu;
Feng, Jianrui;
Kang, Liqun;
Liu, Longxiang;
Zhao, Fangjia;
Zhao, Siyu;
Brett, Dan JL;
... Parkin, Ivan P; + view all
(2022)
Hybrid Ni₂P/CoP Nanosheets as Efficient and Robust Electrocatalysts for Domestic Wastewater Splitting.
Energy & Environmental Materials
10.1002/eem2.12398.
(In press).
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Abstract
The development of low-cost, robust and efficient non-noble metal electrocatalysts is still a pursuit for the hydrogen evolution reaction (HER). Herein, a self-standing electrocatalyst, Ni2P/CoP nanosheet, was fabricated directly on three-dimensional Ni foams by two facile steps, which illustrated both high activity and stability for HER in different electrolytes. Benefiting from the porous structures of nanosheets with large specific surface area and the hybrid Ni2P/CoP, the as-prepared electrocatalyst presented remarkable HER with overpotentials of 65.2 and 87.8 mV to reach a current density of −10 mA cm−2 in neutral and alkaline media, respectively. Density function theory calculations revealed a lower activation energy of water dissociation and efficient HER steps of hybrid Ni2P/CoP nanosheets compared with mono CoP. The self-standing electrocatalyst maintained excellent chemical stability. Additionally, the HER process in domestic wastewater was realized with more impressive performance by using Ni2P/CoP nanosheets compared with commercial Pt/C. Hydrogen was continuously generated for 20 h in mildly alkaline dishwashing wastewater. This work provides a feasible way to fabricate non-noble metal and self-standing hybrid bimetallic phosphides for HER in neutral and alkaline media, showing great potential for efficient hydrogen production by re-utilizing wastewater resources.
Type: | Article |
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Title: | Hybrid Ni₂P/CoP Nanosheets as Efficient and Robust Electrocatalysts for Domestic Wastewater Splitting |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1002/eem2.12398 |
Publisher version: | https://doi.org/10.1002/eem2.12398 |
Language: | English |
Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
Keywords: | Hybrid, hydrogen evolution reaction, Ni2P/CoP nanosheet, self-standing, wastewater splitting |
UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
URI: | https://discovery.ucl.ac.uk/id/eprint/10148534 |
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