Self-adaptive amorphous Co2P@Co2P/Co-polyoxometalate/nickel foam as an effective electrode for electrocatalytic water splitting in alkaline electrolyte |
| |
| Affiliation: | 1. College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, Shandong, PR China;2. Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China;1. Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, 100190, Beijing, China;2. Jacobs University, Department of Life Sciences and Chemistry, P.O. Box 750 561, 28725, Bremen, Germany;3. Zhengzhou Tobacco Research Institute of CNTC, 450001, Zhengzhou, China;1. Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, E-43007 Tarragona, Spain;2. Emerson Center for Scientific Computation and Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, GA 30322, United States;3. Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel·lí Domingo 1, 43007 Tarragona, Spain;1. Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003, PR China;2. Key Laboratory of Ecophysics, College of Science, Shihezi University, Shihezi, 832003, PR China;3. School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong, 518172, PR China;4. School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China;5. Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, PR China |
| |
| Abstract: | Noble-metal-free transition metal based phosphides (TMPs) display great potential as candidates to replace the state-of-the-art noble metal-based catalysts for electronic water splitting. In this study, amorphous Co2P was decorated on Co-polyoxometalate (POM) and conductive cobalt phosphide forming integrated Co2P@ Co2P/Co-POM/NF electrode, through in suit growth, low-temperature phosphating and electrocatalytic self-adaption pathway by the stripping of superficial Co-POM when subjected to persistent bubbles. The fantastic design simultaneously offers excellent electrical conductivity for fast electron transfer, a large surface area with numerous active edge sites and a conductive current collector facilitating mass transfer and gas release. The electrode showed high catalytic activity, requiring overpotential of 130 mV for HER to achieve a current density of 50 mA/cm2, 336 mV for OER to achieve a current density of 50 mA/cm2, affording a water-splitting current density of 10 mA/cm2 at a low cell voltage of 1.6 V. The results and facile synthesis method also offer an exciting avenue for the design of amorphous phase TMPs on a current collector with high specific area and excellent electrical conductivity for energy storage and conversion devices. |
| |
| Keywords: | Water splitting HER catalyst Self-adaption Cobalt phosphide |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
