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Amorphous Ni(x)Co(y)P-supported TiO(2) nanotube arrays as an efficient hydrogen evolution reaction electrocatalyst in acidic solution

Bimetallic phosphides have been attracting increasing attention due to their synergistic effect for improving the hydrogen evolution reaction as compared to monometallic phosphides. In this work, NiCoP modified hybrid electrodes were fabricated by a one-step electrodeposition process with TiO(2) nan...

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Autores principales: Li, Yong, Yang, Peng, Wang, Bin, Liu, Zhongqing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Beilstein-Institut 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6334790/
https://www.ncbi.nlm.nih.gov/pubmed/30680279
http://dx.doi.org/10.3762/bjnano.10.6
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author Li, Yong
Yang, Peng
Wang, Bin
Liu, Zhongqing
author_facet Li, Yong
Yang, Peng
Wang, Bin
Liu, Zhongqing
author_sort Li, Yong
collection PubMed
description Bimetallic phosphides have been attracting increasing attention due to their synergistic effect for improving the hydrogen evolution reaction as compared to monometallic phosphides. In this work, NiCoP modified hybrid electrodes were fabricated by a one-step electrodeposition process with TiO(2) nanotube arrays (TNAs) as a carrier. X-ray diffraction, transmission electron microscopy, UV–vis diffuse reflection spectroscopy, X-ray photoelectron spectroscopy and scanning transmission electron microscopy/energy-dispersive X-ray spectroscopy were used to characterize the physiochemical properties of the samples. The electrochemical performance was investigated by cyclic voltammetry, linear sweep voltammetry, and electrochemical impedance spectroscopy. We show that after incorporating Co into Ni–P, the resulting Ni(x)Co(y)P/TNAs present enhanced electrocatalytic activity due to the improved electron transfer and increased electrochemically active surface area (ECSA). In 0.5 mol L(−1) H(2)SO(4) electrolyte, the Ni(x)Co(y)P/TNAs (x = 3.84, y = 0.78) demonstrated an ECSA value of 52.1 mF cm(−2), which is 3.8 times that of Ni–P/TNAs (13.7 mF cm(−2)). In a two-electrode system with a Pt sheet as the anode, the Ni(x)Co(y)P/TNAs presented a bath voltage of 1.92 V at 100 mA cm(−2), which is an improvment of 79% over that of 1.07 V at 10 mA cm(−2).
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spelling pubmed-63347902019-01-24 Amorphous Ni(x)Co(y)P-supported TiO(2) nanotube arrays as an efficient hydrogen evolution reaction electrocatalyst in acidic solution Li, Yong Yang, Peng Wang, Bin Liu, Zhongqing Beilstein J Nanotechnol Full Research Paper Bimetallic phosphides have been attracting increasing attention due to their synergistic effect for improving the hydrogen evolution reaction as compared to monometallic phosphides. In this work, NiCoP modified hybrid electrodes were fabricated by a one-step electrodeposition process with TiO(2) nanotube arrays (TNAs) as a carrier. X-ray diffraction, transmission electron microscopy, UV–vis diffuse reflection spectroscopy, X-ray photoelectron spectroscopy and scanning transmission electron microscopy/energy-dispersive X-ray spectroscopy were used to characterize the physiochemical properties of the samples. The electrochemical performance was investigated by cyclic voltammetry, linear sweep voltammetry, and electrochemical impedance spectroscopy. We show that after incorporating Co into Ni–P, the resulting Ni(x)Co(y)P/TNAs present enhanced electrocatalytic activity due to the improved electron transfer and increased electrochemically active surface area (ECSA). In 0.5 mol L(−1) H(2)SO(4) electrolyte, the Ni(x)Co(y)P/TNAs (x = 3.84, y = 0.78) demonstrated an ECSA value of 52.1 mF cm(−2), which is 3.8 times that of Ni–P/TNAs (13.7 mF cm(−2)). In a two-electrode system with a Pt sheet as the anode, the Ni(x)Co(y)P/TNAs presented a bath voltage of 1.92 V at 100 mA cm(−2), which is an improvment of 79% over that of 1.07 V at 10 mA cm(−2). Beilstein-Institut 2019-01-07 /pmc/articles/PMC6334790/ /pubmed/30680279 http://dx.doi.org/10.3762/bjnano.10.6 Text en Copyright © 2019, Li et al. https://creativecommons.org/licenses/by/4.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0). Please note that the reuse, redistribution and reproduction in particular requires that the authors and source are credited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms)
spellingShingle Full Research Paper
Li, Yong
Yang, Peng
Wang, Bin
Liu, Zhongqing
Amorphous Ni(x)Co(y)P-supported TiO(2) nanotube arrays as an efficient hydrogen evolution reaction electrocatalyst in acidic solution
title Amorphous Ni(x)Co(y)P-supported TiO(2) nanotube arrays as an efficient hydrogen evolution reaction electrocatalyst in acidic solution
title_full Amorphous Ni(x)Co(y)P-supported TiO(2) nanotube arrays as an efficient hydrogen evolution reaction electrocatalyst in acidic solution
title_fullStr Amorphous Ni(x)Co(y)P-supported TiO(2) nanotube arrays as an efficient hydrogen evolution reaction electrocatalyst in acidic solution
title_full_unstemmed Amorphous Ni(x)Co(y)P-supported TiO(2) nanotube arrays as an efficient hydrogen evolution reaction electrocatalyst in acidic solution
title_short Amorphous Ni(x)Co(y)P-supported TiO(2) nanotube arrays as an efficient hydrogen evolution reaction electrocatalyst in acidic solution
title_sort amorphous ni(x)co(y)p-supported tio(2) nanotube arrays as an efficient hydrogen evolution reaction electrocatalyst in acidic solution
topic Full Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6334790/
https://www.ncbi.nlm.nih.gov/pubmed/30680279
http://dx.doi.org/10.3762/bjnano.10.6
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